drivers/gpu/drm/i915/intel_display.c

   1 /*
   2  * Copyright © 2006-2007 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Eric Anholt <eric@anholt.net>
  25  */
  26
  27 #include <linux/dmi.h>
  28 #include <linux/module.h>
  29 #include <linux/input.h>
  30 #include <linux/i2c.h>
  31 #include <linux/kernel.h>
  32 #include <linux/slab.h>
  33 #include <linux/vgaarb.h>
  34 #include <drm/drm_edid.h>
  35 #include <drm/drmP.h>
  36 #include "intel_drv.h"
  37 #include <drm/i915_drm.h>
  38 #include "i915_drv.h"
  39 #include "i915_trace.h"
  40 #include <drm/drm_dp_helper.h>
  41 #include <drm/drm_crtc_helper.h>
  42 #include <linux/dma_remapping.h>
  43
  44 bool intel_pipe_has_type(struct drm_crtc *crtc, int type);
  45 static void intel_increase_pllclock(struct drm_crtc *crtc);
  46 static void intel_crtc_update_cursor(struct drm_crtc *crtc, bool on);
  47
  48 typedef struct {
  49         /* given values */
  50         int n;
  51         int m1, m2;
  52         int p1, p2;
  53         /* derived values */
  54         int     dot;
  55         int     vco;
  56         int     m;
  57         int     p;
  58 } intel_clock_t;
  59
  60 typedef struct {
  61         int     min, max;
  62 } intel_range_t;
  63
  64 typedef struct {
  65         int     dot_limit;
  66         int     p2_slow, p2_fast;
  67 } intel_p2_t;
  68
  69 #define INTEL_P2_NUM                  2
  70 typedef struct intel_limit intel_limit_t;
  71 struct intel_limit {
  72         intel_range_t   dot, vco, n, m, m1, m2, p, p1;
  73         intel_p2_t          p2;
  74         /**
  75          * find_pll() - Find the best values for the PLL
  76          * @limit: limits for the PLL
  77          * @crtc: current CRTC
  78          * @target: target frequency in kHz
  79          * @refclk: reference clock frequency in kHz
  80          * @match_clock: if provided, @best_clock P divider must
  81          *               match the P divider from @match_clock
  82          *               used for LVDS downclocking
  83          * @best_clock: best PLL values found
  84          *
  85          * Returns true on success, false on failure.
  86          */
  87         bool (*find_pll)(const intel_limit_t *limit,
  88                          struct drm_crtc *crtc,
  89                          int target, int refclk,
  90                          intel_clock_t *match_clock,
  91                          intel_clock_t *best_clock);
  92 };
  93
  94 /* FDI */
  95 #define IRONLAKE_FDI_FREQ               2700000 /* in kHz for mode->clock */
  96
  97 int
  98 intel_pch_rawclk(struct drm_device *dev)
  99 {
 100         struct drm_i915_private *dev_priv = dev->dev_private;
 101
 102         WARN_ON(!HAS_PCH_SPLIT(dev));
 103
 104         return I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK;
 105 }
 106
 107 static bool
 108 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 109                     int target, int refclk, intel_clock_t *match_clock,
 110                     intel_clock_t *best_clock);
 111 static bool
 112 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 113                         int target, int refclk, intel_clock_t *match_clock,
 114                         intel_clock_t *best_clock);
 115
 116 static bool
 117 intel_find_pll_g4x_dp(const intel_limit_t *, struct drm_crtc *crtc,
 118                       int target, int refclk, intel_clock_t *match_clock,
 119                       intel_clock_t *best_clock);
 120 static bool
 121 intel_find_pll_ironlake_dp(const intel_limit_t *, struct drm_crtc *crtc,
 122                            int target, int refclk, intel_clock_t *match_clock,
 123                            intel_clock_t *best_clock);
 124
 125 static bool
 126 intel_vlv_find_best_pll(const intel_limit_t *limit, struct drm_crtc *crtc,
 127                         int target, int refclk, intel_clock_t *match_clock,
 128                         intel_clock_t *best_clock);
 129
 130 static inline u32 /* units of 100MHz */
 131 intel_fdi_link_freq(struct drm_device *dev)
 132 {
 133         if (IS_GEN5(dev)) {
 134                 struct drm_i915_private *dev_priv = dev->dev_private;
 135                 return (I915_READ(FDI_PLL_BIOS_0) & FDI_PLL_FB_CLOCK_MASK) + 2;
 136         } else
 137                 return 27;
 138 }
 139
 140 static const intel_limit_t intel_limits_i8xx_dvo = {
 141         .dot = { .min = 25000, .max = 350000 },
 142         .vco = { .min = 930000, .max = 1400000 },
 143         .n = { .min = 3, .max = 16 },
 144         .m = { .min = 96, .max = 140 },
 145         .m1 = { .min = 18, .max = 26 },
 146         .m2 = { .min = 6, .max = 16 },
 147         .p = { .min = 4, .max = 128 },
 148         .p1 = { .min = 2, .max = 33 },
 149         .p2 = { .dot_limit = 165000,
 150                 .p2_slow = 4, .p2_fast = 2 },
 151         .find_pll = intel_find_best_PLL,
 152 };
 153
 154 static const intel_limit_t intel_limits_i8xx_lvds = {
 155         .dot = { .min = 25000, .max = 350000 },
 156         .vco = { .min = 930000, .max = 1400000 },
 157         .n = { .min = 3, .max = 16 },
 158         .m = { .min = 96, .max = 140 },
 159         .m1 = { .min = 18, .max = 26 },
 160         .m2 = { .min = 6, .max = 16 },
 161         .p = { .min = 4, .max = 128 },
 162         .p1 = { .min = 1, .max = 6 },
 163         .p2 = { .dot_limit = 165000,
 164                 .p2_slow = 14, .p2_fast = 7 },
 165         .find_pll = intel_find_best_PLL,
 166 };
 167
 168 static const intel_limit_t intel_limits_i9xx_sdvo = {
 169         .dot = { .min = 20000, .max = 400000 },
 170         .vco = { .min = 1400000, .max = 2800000 },
 171         .n = { .min = 1, .max = 6 },
 172         .m = { .min = 70, .max = 120 },
 173         .m1 = { .min = 8, .max = 18 },
 174         .m2 = { .min = 3, .max = 7 },
 175         .p = { .min = 5, .max = 80 },
 176         .p1 = { .min = 1, .max = 8 },
 177         .p2 = { .dot_limit = 200000,
 178                 .p2_slow = 10, .p2_fast = 5 },
 179         .find_pll = intel_find_best_PLL,
 180 };
 181
 182 static const intel_limit_t intel_limits_i9xx_lvds = {
 183         .dot = { .min = 20000, .max = 400000 },
 184         .vco = { .min = 1400000, .max = 2800000 },
 185         .n = { .min = 1, .max = 6 },
 186         .m = { .min = 70, .max = 120 },
 187         .m1 = { .min = 8, .max = 18 },
 188         .m2 = { .min = 3, .max = 7 },
 189         .p = { .min = 7, .max = 98 },
 190         .p1 = { .min = 1, .max = 8 },
 191         .p2 = { .dot_limit = 112000,
 192                 .p2_slow = 14, .p2_fast = 7 },
 193         .find_pll = intel_find_best_PLL,
 194 };
 195
 196
 197 static const intel_limit_t intel_limits_g4x_sdvo = {
 198         .dot = { .min = 25000, .max = 270000 },
 199         .vco = { .min = 1750000, .max = 3500000},
 200         .n = { .min = 1, .max = 4 },
 201         .m = { .min = 104, .max = 138 },
 202         .m1 = { .min = 17, .max = 23 },
 203         .m2 = { .min = 5, .max = 11 },
 204         .p = { .min = 10, .max = 30 },
 205         .p1 = { .min = 1, .max = 3},
 206         .p2 = { .dot_limit = 270000,
 207                 .p2_slow = 10,
 208                 .p2_fast = 10
 209         },
 210         .find_pll = intel_g4x_find_best_PLL,
 211 };
 212
 213 static const intel_limit_t intel_limits_g4x_hdmi = {
 214         .dot = { .min = 22000, .max = 400000 },
 215         .vco = { .min = 1750000, .max = 3500000},
 216         .n = { .min = 1, .max = 4 },
 217         .m = { .min = 104, .max = 138 },
 218         .m1 = { .min = 16, .max = 23 },
 219         .m2 = { .min = 5, .max = 11 },
 220         .p = { .min = 5, .max = 80 },
 221         .p1 = { .min = 1, .max = 8},
 222         .p2 = { .dot_limit = 165000,
 223                 .p2_slow = 10, .p2_fast = 5 },
 224         .find_pll = intel_g4x_find_best_PLL,
 225 };
 226
 227 static const intel_limit_t intel_limits_g4x_single_channel_lvds = {
 228         .dot = { .min = 20000, .max = 115000 },
 229         .vco = { .min = 1750000, .max = 3500000 },
 230         .n = { .min = 1, .max = 3 },
 231         .m = { .min = 104, .max = 138 },
 232         .m1 = { .min = 17, .max = 23 },
 233         .m2 = { .min = 5, .max = 11 },
 234         .p = { .min = 28, .max = 112 },
 235         .p1 = { .min = 2, .max = 8 },
 236         .p2 = { .dot_limit = 0,
 237                 .p2_slow = 14, .p2_fast = 14
 238         },
 239         .find_pll = intel_g4x_find_best_PLL,
 240 };
 241
 242 static const intel_limit_t intel_limits_g4x_dual_channel_lvds = {
 243         .dot = { .min = 80000, .max = 224000 },
 244         .vco = { .min = 1750000, .max = 3500000 },
 245         .n = { .min = 1, .max = 3 },
 246         .m = { .min = 104, .max = 138 },
 247         .m1 = { .min = 17, .max = 23 },
 248         .m2 = { .min = 5, .max = 11 },
 249         .p = { .min = 14, .max = 42 },
 250         .p1 = { .min = 2, .max = 6 },
 251         .p2 = { .dot_limit = 0,
 252                 .p2_slow = 7, .p2_fast = 7
 253         },
 254         .find_pll = intel_g4x_find_best_PLL,
 255 };
 256
 257 static const intel_limit_t intel_limits_g4x_display_port = {
 258         .dot = { .min = 161670, .max = 227000 },
 259         .vco = { .min = 1750000, .max = 3500000},
 260         .n = { .min = 1, .max = 2 },
 261         .m = { .min = 97, .max = 108 },
 262         .m1 = { .min = 0x10, .max = 0x12 },
 263         .m2 = { .min = 0x05, .max = 0x06 },
 264         .p = { .min = 10, .max = 20 },
 265         .p1 = { .min = 1, .max = 2},
 266         .p2 = { .dot_limit = 0,
 267                 .p2_slow = 10, .p2_fast = 10 },
 268         .find_pll = intel_find_pll_g4x_dp,
 269 };
 270
 271 static const intel_limit_t intel_limits_pineview_sdvo = {
 272         .dot = { .min = 20000, .max = 400000},
 273         .vco = { .min = 1700000, .max = 3500000 },
 274         /* Pineview's Ncounter is a ring counter */
 275         .n = { .min = 3, .max = 6 },
 276         .m = { .min = 2, .max = 256 },
 277         /* Pineview only has one combined m divider, which we treat as m2. */
 278         .m1 = { .min = 0, .max = 0 },
 279         .m2 = { .min = 0, .max = 254 },
 280         .p = { .min = 5, .max = 80 },
 281         .p1 = { .min = 1, .max = 8 },
 282         .p2 = { .dot_limit = 200000,
 283                 .p2_slow = 10, .p2_fast = 5 },
 284         .find_pll = intel_find_best_PLL,
 285 };
 286
 287 static const intel_limit_t intel_limits_pineview_lvds = {
 288         .dot = { .min = 20000, .max = 400000 },
 289         .vco = { .min = 1700000, .max = 3500000 },
 290         .n = { .min = 3, .max = 6 },
 291         .m = { .min = 2, .max = 256 },
 292         .m1 = { .min = 0, .max = 0 },
 293         .m2 = { .min = 0, .max = 254 },
 294         .p = { .min = 7, .max = 112 },
 295         .p1 = { .min = 1, .max = 8 },
 296         .p2 = { .dot_limit = 112000,
 297                 .p2_slow = 14, .p2_fast = 14 },
 298         .find_pll = intel_find_best_PLL,
 299 };
 300
 301 /* Ironlake / Sandybridge
 302  *
 303  * We calculate clock using (register_value + 2) for N/M1/M2, so here
 304  * the range value for them is (actual_value - 2).
 305  */
 306 static const intel_limit_t intel_limits_ironlake_dac = {
 307         .dot = { .min = 25000, .max = 350000 },
 308         .vco = { .min = 1760000, .max = 3510000 },
 309         .n = { .min = 1, .max = 5 },
 310         .m = { .min = 79, .max = 127 },
 311         .m1 = { .min = 12, .max = 22 },
 312         .m2 = { .min = 5, .max = 9 },
 313         .p = { .min = 5, .max = 80 },
 314         .p1 = { .min = 1, .max = 8 },
 315         .p2 = { .dot_limit = 225000,
 316                 .p2_slow = 10, .p2_fast = 5 },
 317         .find_pll = intel_g4x_find_best_PLL,
 318 };
 319
 320 static const intel_limit_t intel_limits_ironlake_single_lvds = {
 321         .dot = { .min = 25000, .max = 350000 },
 322         .vco = { .min = 1760000, .max = 3510000 },
 323         .n = { .min = 1, .max = 3 },
 324         .m = { .min = 79, .max = 118 },
 325         .m1 = { .min = 12, .max = 22 },
 326         .m2 = { .min = 5, .max = 9 },
 327         .p = { .min = 28, .max = 112 },
 328         .p1 = { .min = 2, .max = 8 },
 329         .p2 = { .dot_limit = 225000,
 330                 .p2_slow = 14, .p2_fast = 14 },
 331         .find_pll = intel_g4x_find_best_PLL,
 332 };
 333
 334 static const intel_limit_t intel_limits_ironlake_dual_lvds = {
 335         .dot = { .min = 25000, .max = 350000 },
 336         .vco = { .min = 1760000, .max = 3510000 },
 337         .n = { .min = 1, .max = 3 },
 338         .m = { .min = 79, .max = 127 },
 339         .m1 = { .min = 12, .max = 22 },
 340         .m2 = { .min = 5, .max = 9 },
 341         .p = { .min = 14, .max = 56 },
 342         .p1 = { .min = 2, .max = 8 },
 343         .p2 = { .dot_limit = 225000,
 344                 .p2_slow = 7, .p2_fast = 7 },
 345         .find_pll = intel_g4x_find_best_PLL,
 346 };
 347
 348 /* LVDS 100mhz refclk limits. */
 349 static const intel_limit_t intel_limits_ironlake_single_lvds_100m = {
 350         .dot = { .min = 25000, .max = 350000 },
 351         .vco = { .min = 1760000, .max = 3510000 },
 352         .n = { .min = 1, .max = 2 },
 353         .m = { .min = 79, .max = 126 },
 354         .m1 = { .min = 12, .max = 22 },
 355         .m2 = { .min = 5, .max = 9 },
 356         .p = { .min = 28, .max = 112 },
 357         .p1 = { .min = 2, .max = 8 },
 358         .p2 = { .dot_limit = 225000,
 359                 .p2_slow = 14, .p2_fast = 14 },
 360         .find_pll = intel_g4x_find_best_PLL,
 361 };
 362
 363 static const intel_limit_t intel_limits_ironlake_dual_lvds_100m = {
 364         .dot = { .min = 25000, .max = 350000 },
 365         .vco = { .min = 1760000, .max = 3510000 },
 366         .n = { .min = 1, .max = 3 },
 367         .m = { .min = 79, .max = 126 },
 368         .m1 = { .min = 12, .max = 22 },
 369         .m2 = { .min = 5, .max = 9 },
 370         .p = { .min = 14, .max = 42 },
 371         .p1 = { .min = 2, .max = 6 },
 372         .p2 = { .dot_limit = 225000,
 373                 .p2_slow = 7, .p2_fast = 7 },
 374         .find_pll = intel_g4x_find_best_PLL,
 375 };
 376
 377 static const intel_limit_t intel_limits_ironlake_display_port = {
 378         .dot = { .min = 25000, .max = 350000 },
 379         .vco = { .min = 1760000, .max = 3510000},
 380         .n = { .min = 1, .max = 2 },
 381         .m = { .min = 81, .max = 90 },
 382         .m1 = { .min = 12, .max = 22 },
 383         .m2 = { .min = 5, .max = 9 },
 384         .p = { .min = 10, .max = 20 },
 385         .p1 = { .min = 1, .max = 2},
 386         .p2 = { .dot_limit = 0,
 387                 .p2_slow = 10, .p2_fast = 10 },
 388         .find_pll = intel_find_pll_ironlake_dp,
 389 };
 390
 391 static const intel_limit_t intel_limits_vlv_dac = {
 392         .dot = { .min = 25000, .max = 270000 },
 393         .vco = { .min = 4000000, .max = 6000000 },
 394         .n = { .min = 1, .max = 7 },
 395         .m = { .min = 22, .max = 450 }, /* guess */
 396         .m1 = { .min = 2, .max = 3 },
 397         .m2 = { .min = 11, .max = 156 },
 398         .p = { .min = 10, .max = 30 },
 399         .p1 = { .min = 2, .max = 3 },
 400         .p2 = { .dot_limit = 270000,
 401                 .p2_slow = 2, .p2_fast = 20 },
 402         .find_pll = intel_vlv_find_best_pll,
 403 };
 404
 405 static const intel_limit_t intel_limits_vlv_hdmi = {
 406         .dot = { .min = 20000, .max = 165000 },
 407         .vco = { .min = 4000000, .max = 5994000},
 408         .n = { .min = 1, .max = 7 },
 409         .m = { .min = 60, .max = 300 }, /* guess */
 410         .m1 = { .min = 2, .max = 3 },
 411         .m2 = { .min = 11, .max = 156 },
 412         .p = { .min = 10, .max = 30 },
 413         .p1 = { .min = 2, .max = 3 },
 414         .p2 = { .dot_limit = 270000,
 415                 .p2_slow = 2, .p2_fast = 20 },
 416         .find_pll = intel_vlv_find_best_pll,
 417 };
 418
 419 static const intel_limit_t intel_limits_vlv_dp = {
 420         .dot = { .min = 25000, .max = 270000 },
 421         .vco = { .min = 4000000, .max = 6000000 },
 422         .n = { .min = 1, .max = 7 },
 423         .m = { .min = 22, .max = 450 },
 424         .m1 = { .min = 2, .max = 3 },
 425         .m2 = { .min = 11, .max = 156 },
 426         .p = { .min = 10, .max = 30 },
 427         .p1 = { .min = 2, .max = 3 },
 428         .p2 = { .dot_limit = 270000,
 429                 .p2_slow = 2, .p2_fast = 20 },
 430         .find_pll = intel_vlv_find_best_pll,
 431 };
 432
 433 u32 intel_dpio_read(struct drm_i915_private *dev_priv, int reg)
 434 {
 435         WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
 436
 437         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
 438                 DRM_ERROR("DPIO idle wait timed out\n");
 439                 return 0;
 440         }
 441
 442         I915_WRITE(DPIO_REG, reg);
 443         I915_WRITE(DPIO_PKT, DPIO_RID | DPIO_OP_READ | DPIO_PORTID |
 444                    DPIO_BYTE);
 445         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
 446                 DRM_ERROR("DPIO read wait timed out\n");
 447                 return 0;
 448         }
 449
 450         return I915_READ(DPIO_DATA);
 451 }
 452
 453 static void intel_dpio_write(struct drm_i915_private *dev_priv, int reg,
 454                              u32 val)
 455 {
 456         WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
 457
 458         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
 459                 DRM_ERROR("DPIO idle wait timed out\n");
 460                 return;
 461         }
 462
 463         I915_WRITE(DPIO_DATA, val);
 464         I915_WRITE(DPIO_REG, reg);
 465         I915_WRITE(DPIO_PKT, DPIO_RID | DPIO_OP_WRITE | DPIO_PORTID |
 466                    DPIO_BYTE);
 467         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100))
 468                 DRM_ERROR("DPIO write wait timed out\n");
 469 }
 470
 471 static void vlv_init_dpio(struct drm_device *dev)
 472 {
 473         struct drm_i915_private *dev_priv = dev->dev_private;
 474
 475         /* Reset the DPIO config */
 476         I915_WRITE(DPIO_CTL, 0);
 477         POSTING_READ(DPIO_CTL);
 478         I915_WRITE(DPIO_CTL, 1);
 479         POSTING_READ(DPIO_CTL);
 480 }
 481
 482 static const intel_limit_t *intel_ironlake_limit(struct drm_crtc *crtc,
 483                                                 int refclk)
 484 {
 485         struct drm_device *dev = crtc->dev;
 486         const intel_limit_t *limit;
 487
 488         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 489                 if (intel_is_dual_link_lvds(dev)) {
 490                         if (refclk == 100000)
 491                                 limit = &intel_limits_ironlake_dual_lvds_100m;
 492                         else
 493                                 limit = &intel_limits_ironlake_dual_lvds;
 494                 } else {
 495                         if (refclk == 100000)
 496                                 limit = &intel_limits_ironlake_single_lvds_100m;
 497                         else
 498                                 limit = &intel_limits_ironlake_single_lvds;
 499                 }
 500         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
 501                    intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))
 502                 limit = &intel_limits_ironlake_display_port;
 503         else
 504                 limit = &intel_limits_ironlake_dac;
 505
 506         return limit;
 507 }
 508
 509 static const intel_limit_t *intel_g4x_limit(struct drm_crtc *crtc)
 510 {
 511         struct drm_device *dev = crtc->dev;
 512         const intel_limit_t *limit;
 513
 514         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 515                 if (intel_is_dual_link_lvds(dev))
 516                         limit = &intel_limits_g4x_dual_channel_lvds;
 517                 else
 518                         limit = &intel_limits_g4x_single_channel_lvds;
 519         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI) ||
 520                    intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
 521                 limit = &intel_limits_g4x_hdmi;
 522         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
 523                 limit = &intel_limits_g4x_sdvo;
 524         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
 525                 limit = &intel_limits_g4x_display_port;
 526         } else /* The option is for other outputs */
 527                 limit = &intel_limits_i9xx_sdvo;
 528
 529         return limit;
 530 }
 531
 532 static const intel_limit_t *intel_limit(struct drm_crtc *crtc, int refclk)
 533 {
 534         struct drm_device *dev = crtc->dev;
 535         const intel_limit_t *limit;
 536
 537         if (HAS_PCH_SPLIT(dev))
 538                 limit = intel_ironlake_limit(crtc, refclk);
 539         else if (IS_G4X(dev)) {
 540                 limit = intel_g4x_limit(crtc);
 541         } else if (IS_PINEVIEW(dev)) {
 542                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 543                         limit = &intel_limits_pineview_lvds;
 544                 else
 545                         limit = &intel_limits_pineview_sdvo;
 546         } else if (IS_VALLEYVIEW(dev)) {
 547                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG))
 548                         limit = &intel_limits_vlv_dac;
 549                 else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI))
 550                         limit = &intel_limits_vlv_hdmi;
 551                 else
 552                         limit = &intel_limits_vlv_dp;
 553         } else if (!IS_GEN2(dev)) {
 554                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 555                         limit = &intel_limits_i9xx_lvds;
 556                 else
 557                         limit = &intel_limits_i9xx_sdvo;
 558         } else {
 559                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 560                         limit = &intel_limits_i8xx_lvds;
 561                 else
 562                         limit = &intel_limits_i8xx_dvo;
 563         }
 564         return limit;
 565 }
 566
 567 /* m1 is reserved as 0 in Pineview, n is a ring counter */
 568 static void pineview_clock(int refclk, intel_clock_t *clock)
 569 {
 570         clock->m = clock->m2 + 2;
 571         clock->p = clock->p1 * clock->p2;
 572         clock->vco = refclk * clock->m / clock->n;
 573         clock->dot = clock->vco / clock->p;
 574 }
 575
 576 static void intel_clock(struct drm_device *dev, int refclk, intel_clock_t *clock)
 577 {
 578         if (IS_PINEVIEW(dev)) {
 579                 pineview_clock(refclk, clock);
 580                 return;
 581         }
 582         clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
 583         clock->p = clock->p1 * clock->p2;
 584         clock->vco = refclk * clock->m / (clock->n + 2);
 585         clock->dot = clock->vco / clock->p;
 586 }
 587
 588 /**
 589  * Returns whether any output on the specified pipe is of the specified type
 590  */
 591 bool intel_pipe_has_type(struct drm_crtc *crtc, int type)
 592 {
 593         struct drm_device *dev = crtc->dev;
 594         struct intel_encoder *encoder;
 595
 596         for_each_encoder_on_crtc(dev, crtc, encoder)
 597                 if (encoder->type == type)
 598                         return true;
 599
 600         return false;
 601 }
 602
 603 #define INTELPllInvalid(s)   do { /* DRM_DEBUG(s); */ return false; } while (0)
 604 /**
 605  * Returns whether the given set of divisors are valid for a given refclk with
 606  * the given connectors.
 607  */
 608
 609 static bool intel_PLL_is_valid(struct drm_device *dev,
 610                                const intel_limit_t *limit,
 611                                const intel_clock_t *clock)
 612 {
 613         if (clock->p1  < limit->p1.min  || limit->p1.max  < clock->p1)
 614                 INTELPllInvalid("p1 out of range\n");
 615         if (clock->p   < limit->p.min   || limit->p.max   < clock->p)
 616                 INTELPllInvalid("p out of range\n");
 617         if (clock->m2  < limit->m2.min  || limit->m2.max  < clock->m2)
 618                 INTELPllInvalid("m2 out of range\n");
 619         if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
 620                 INTELPllInvalid("m1 out of range\n");
 621         if (clock->m1 <= clock->m2 && !IS_PINEVIEW(dev))
 622                 INTELPllInvalid("m1 <= m2\n");
 623         if (clock->m   < limit->m.min   || limit->m.max   < clock->m)
 624                 INTELPllInvalid("m out of range\n");
 625         if (clock->n   < limit->n.min   || limit->n.max   < clock->n)
 626                 INTELPllInvalid("n out of range\n");
 627         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
 628                 INTELPllInvalid("vco out of range\n");
 629         /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
 630          * connector, etc., rather than just a single range.
 631          */
 632         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
 633                 INTELPllInvalid("dot out of range\n");
 634
 635         return true;
 636 }
 637
 638 static bool
 639 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 640                     int target, int refclk, intel_clock_t *match_clock,
 641                     intel_clock_t *best_clock)
 642
 643 {
 644         struct drm_device *dev = crtc->dev;
 645         intel_clock_t clock;
 646         int err = target;
 647
 648         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 649                 /*
 650                  * For LVDS just rely on its current settings for dual-channel.
 651                  * We haven't figured out how to reliably set up different
 652                  * single/dual channel state, if we even can.
 653                  */
 654                 if (intel_is_dual_link_lvds(dev))
 655                         clock.p2 = limit->p2.p2_fast;
 656                 else
 657                         clock.p2 = limit->p2.p2_slow;
 658         } else {
 659                 if (target < limit->p2.dot_limit)
 660                         clock.p2 = limit->p2.p2_slow;
 661                 else
 662                         clock.p2 = limit->p2.p2_fast;
 663         }
 664
 665         memset(best_clock, 0, sizeof(*best_clock));
 666
 667         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
 668              clock.m1++) {
 669                 for (clock.m2 = limit->m2.min;
 670                      clock.m2 <= limit->m2.max; clock.m2++) {
 671                         /* m1 is always 0 in Pineview */
 672                         if (clock.m2 >= clock.m1 && !IS_PINEVIEW(dev))
 673                                 break;
 674                         for (clock.n = limit->n.min;
 675                              clock.n <= limit->n.max; clock.n++) {
 676                                 for (clock.p1 = limit->p1.min;
 677                                         clock.p1 <= limit->p1.max; clock.p1++) {
 678                                         int this_err;
 679
 680                                         intel_clock(dev, refclk, &clock);
 681                                         if (!intel_PLL_is_valid(dev, limit,
 682                                                                 &clock))
 683                                                 continue;
 684                                         if (match_clock &&
 685                                             clock.p != match_clock->p)
 686                                                 continue;
 687
 688                                         this_err = abs(clock.dot - target);
 689                                         if (this_err < err) {
 690                                                 *best_clock = clock;
 691                                                 err = this_err;
 692                                         }
 693                                 }
 694                         }
 695                 }
 696         }
 697
 698         return (err != target);
 699 }
 700
 701 static bool
 702 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 703                         int target, int refclk, intel_clock_t *match_clock,
 704                         intel_clock_t *best_clock)
 705 {
 706         struct drm_device *dev = crtc->dev;
 707         intel_clock_t clock;
 708         int max_n;
 709         bool found;
 710         /* approximately equals target * 0.00585 */
 711         int err_most = (target >> 8) + (target >> 9);
 712         found = false;
 713
 714         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 715                 int lvds_reg;
 716
 717                 if (HAS_PCH_SPLIT(dev))
 718                         lvds_reg = PCH_LVDS;
 719                 else
 720                         lvds_reg = LVDS;
 721                 if (intel_is_dual_link_lvds(dev))
 722                         clock.p2 = limit->p2.p2_fast;
 723                 else
 724                         clock.p2 = limit->p2.p2_slow;
 725         } else {
 726                 if (target < limit->p2.dot_limit)
 727                         clock.p2 = limit->p2.p2_slow;
 728                 else
 729                         clock.p2 = limit->p2.p2_fast;
 730         }
 731
 732         memset(best_clock, 0, sizeof(*best_clock));
 733         max_n = limit->n.max;
 734         /* based on hardware requirement, prefer smaller n to precision */
 735         for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
 736                 /* based on hardware requirement, prefere larger m1,m2 */
 737                 for (clock.m1 = limit->m1.max;
 738                      clock.m1 >= limit->m1.min; clock.m1--) {
 739                         for (clock.m2 = limit->m2.max;
 740                              clock.m2 >= limit->m2.min; clock.m2--) {
 741                                 for (clock.p1 = limit->p1.max;
 742                                      clock.p1 >= limit->p1.min; clock.p1--) {
 743                                         int this_err;
 744
 745                                         intel_clock(dev, refclk, &clock);
 746                                         if (!intel_PLL_is_valid(dev, limit,
 747                                                                 &clock))
 748                                                 continue;
 749                                         if (match_clock &&
 750                                             clock.p != match_clock->p)
 751                                                 continue;
 752
 753                                         this_err = abs(clock.dot - target);
 754                                         if (this_err < err_most) {
 755                                                 *best_clock = clock;
 756                                                 err_most = this_err;
 757                                                 max_n = clock.n;
 758                                                 found = true;
 759                                         }
 760                                 }
 761                         }
 762                 }
 763         }
 764         return found;
 765 }
 766
 767 static bool
 768 intel_find_pll_ironlake_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
 769                            int target, int refclk, intel_clock_t *match_clock,
 770                            intel_clock_t *best_clock)
 771 {
 772         struct drm_device *dev = crtc->dev;
 773         intel_clock_t clock;
 774
 775         if (target < 200000) {
 776                 clock.n = 1;
 777                 clock.p1 = 2;
 778                 clock.p2 = 10;
 779                 clock.m1 = 12;
 780                 clock.m2 = 9;
 781         } else {
 782                 clock.n = 2;
 783                 clock.p1 = 1;
 784                 clock.p2 = 10;
 785                 clock.m1 = 14;
 786                 clock.m2 = 8;
 787         }
 788         intel_clock(dev, refclk, &clock);
 789         memcpy(best_clock, &clock, sizeof(intel_clock_t));
 790         return true;
 791 }
 792
 793 /* DisplayPort has only two frequencies, 162MHz and 270MHz */
 794 static bool
 795 intel_find_pll_g4x_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
 796                       int target, int refclk, intel_clock_t *match_clock,
 797                       intel_clock_t *best_clock)
 798 {
 799         intel_clock_t clock;
 800         if (target < 200000) {
 801                 clock.p1 = 2;
 802                 clock.p2 = 10;
 803                 clock.n = 2;
 804                 clock.m1 = 23;
 805                 clock.m2 = 8;
 806         } else {
 807                 clock.p1 = 1;
 808                 clock.p2 = 10;
 809                 clock.n = 1;
 810                 clock.m1 = 14;
 811                 clock.m2 = 2;
 812         }
 813         clock.m = 5 * (clock.m1 + 2) + (clock.m2 + 2);
 814         clock.p = (clock.p1 * clock.p2);
 815         clock.dot = 96000 * clock.m / (clock.n + 2) / clock.p;
 816         clock.vco = 0;
 817         memcpy(best_clock, &clock, sizeof(intel_clock_t));
 818         return true;
 819 }
 820 static bool
 821 intel_vlv_find_best_pll(const intel_limit_t *limit, struct drm_crtc *crtc,
 822                         int target, int refclk, intel_clock_t *match_clock,
 823                         intel_clock_t *best_clock)
 824 {
 825         u32 p1, p2, m1, m2, vco, bestn, bestm1, bestm2, bestp1, bestp2;
 826         u32 m, n, fastclk;
 827         u32 updrate, minupdate, fracbits, p;
 828         unsigned long bestppm, ppm, absppm;
 829         int dotclk, flag;
 830
 831         flag = 0;
 832         dotclk = target * 1000;
 833         bestppm = 1000000;
 834         ppm = absppm = 0;
 835         fastclk = dotclk / (2*100);
 836         updrate = 0;
 837         minupdate = 19200;
 838         fracbits = 1;
 839         n = p = p1 = p2 = m = m1 = m2 = vco = bestn = 0;
 840         bestm1 = bestm2 = bestp1 = bestp2 = 0;
 841
 842         /* based on hardware requirement, prefer smaller n to precision */
 843         for (n = limit->n.min; n <= ((refclk) / minupdate); n++) {
 844                 updrate = refclk / n;
 845                 for (p1 = limit->p1.max; p1 > limit->p1.min; p1--) {
 846                         for (p2 = limit->p2.p2_fast+1; p2 > 0; p2--) {
 847                                 if (p2 > 10)
 848                                         p2 = p2 - 1;
 849                                 p = p1 * p2;
 850                                 /* based on hardware requirement, prefer bigger m1,m2 values */
 851                                 for (m1 = limit->m1.min; m1 <= limit->m1.max; m1++) {
 852                                         m2 = (((2*(fastclk * p * n / m1 )) +
 853                                                refclk) / (2*refclk));
 854                                         m = m1 * m2;
 855                                         vco = updrate * m;
 856                                         if (vco >= limit->vco.min && vco < limit->vco.max) {
 857                                                 ppm = 1000000 * ((vco / p) - fastclk) / fastclk;
 858                                                 absppm = (ppm > 0) ? ppm : (-ppm);
 859                                                 if (absppm < 100 && ((p1 * p2) > (bestp1 * bestp2))) {
 860                                                         bestppm = 0;
 861                                                         flag = 1;
 862                                                 }
 863                                                 if (absppm < bestppm - 10) {
 864                                                         bestppm = absppm;
 865                                                         flag = 1;
 866                                                 }
 867                                                 if (flag) {
 868                                                         bestn = n;
 869                                                         bestm1 = m1;
 870                                                         bestm2 = m2;
 871                                                         bestp1 = p1;
 872                                                         bestp2 = p2;
 873                                                         flag = 0;
 874                                                 }
 875                                         }
 876                                 }
 877                         }
 878                 }
 879         }
 880         best_clock->n = bestn;
 881         best_clock->m1 = bestm1;
 882         best_clock->m2 = bestm2;
 883         best_clock->p1 = bestp1;
 884         best_clock->p2 = bestp2;
 885
 886         return true;
 887 }
 888
 889 enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
 890                                              enum pipe pipe)
 891 {
 892         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
 893         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 894
 895         return intel_crtc->cpu_transcoder;
 896 }
 897
 898 static void ironlake_wait_for_vblank(struct drm_device *dev, int pipe)
 899 {
 900         struct drm_i915_private *dev_priv = dev->dev_private;
 901         u32 frame, frame_reg = PIPEFRAME(pipe);
 902
 903         frame = I915_READ(frame_reg);
 904
 905         if (wait_for(I915_READ_NOTRACE(frame_reg) != frame, 50))
 906                 DRM_DEBUG_KMS("vblank wait timed out\n");
 907 }
 908
 909 /**
 910  * intel_wait_for_vblank - wait for vblank on a given pipe
 911  * @dev: drm device
 912  * @pipe: pipe to wait for
 913  *
 914  * Wait for vblank to occur on a given pipe.  Needed for various bits of
 915  * mode setting code.
 916  */
 917 void intel_wait_for_vblank(struct drm_device *dev, int pipe)
 918 {
 919         struct drm_i915_private *dev_priv = dev->dev_private;
 920         int pipestat_reg = PIPESTAT(pipe);
 921
 922         if (INTEL_INFO(dev)->gen >= 5) {
 923                 ironlake_wait_for_vblank(dev, pipe);
 924                 return;
 925         }
 926
 927         /* Clear existing vblank status. Note this will clear any other
 928          * sticky status fields as well.
 929          *
 930          * This races with i915_driver_irq_handler() with the result
 931          * that either function could miss a vblank event.  Here it is not
 932          * fatal, as we will either wait upon the next vblank interrupt or
 933          * timeout.  Generally speaking intel_wait_for_vblank() is only
 934          * called during modeset at which time the GPU should be idle and
 935          * should *not* be performing page flips and thus not waiting on
 936          * vblanks...
 937          * Currently, the result of us stealing a vblank from the irq
 938          * handler is that a single frame will be skipped during swapbuffers.
 939          */
 940         I915_WRITE(pipestat_reg,
 941                    I915_READ(pipestat_reg) | PIPE_VBLANK_INTERRUPT_STATUS);
 942
 943         /* Wait for vblank interrupt bit to set */
 944         if (wait_for(I915_READ(pipestat_reg) &
 945                      PIPE_VBLANK_INTERRUPT_STATUS,
 946                      50))
 947                 DRM_DEBUG_KMS("vblank wait timed out\n");
 948 }
 949
 950 /*
 951  * intel_wait_for_pipe_off - wait for pipe to turn off
 952  * @dev: drm device
 953  * @pipe: pipe to wait for
 954  *
 955  * After disabling a pipe, we can't wait for vblank in the usual way,
 956  * spinning on the vblank interrupt status bit, since we won't actually
 957  * see an interrupt when the pipe is disabled.
 958  *
 959  * On Gen4 and above:
 960  *   wait for the pipe register state bit to turn off
 961  *
 962  * Otherwise:
 963  *   wait for the display line value to settle (it usually
 964  *   ends up stopping at the start of the next frame).
 965  *
 966  */
 967 void intel_wait_for_pipe_off(struct drm_device *dev, int pipe)
 968 {
 969         struct drm_i915_private *dev_priv = dev->dev_private;
 970         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
 971                                                                       pipe);
 972
 973         if (INTEL_INFO(dev)->gen >= 4) {
 974                 int reg = PIPECONF(cpu_transcoder);
 975
 976                 /* Wait for the Pipe State to go off */
 977                 if (wait_for((I915_READ(reg) & I965_PIPECONF_ACTIVE) == 0,
 978                              100))
 979                         WARN(1, "pipe_off wait timed out\n");
 980         } else {
 981                 u32 last_line, line_mask;
 982                 int reg = PIPEDSL(pipe);
 983                 unsigned long timeout = jiffies + msecs_to_jiffies(100);
 984
 985                 if (IS_GEN2(dev))
 986                         line_mask = DSL_LINEMASK_GEN2;
 987                 else
 988                         line_mask = DSL_LINEMASK_GEN3;
 989
 990                 /* Wait for the display line to settle */
 991                 do {
 992                         last_line = I915_READ(reg) & line_mask;
 993                         mdelay(5);
 994                 } while (((I915_READ(reg) & line_mask) != last_line) &&
 995                          time_after(timeout, jiffies));
 996                 if (time_after(jiffies, timeout))
 997                         WARN(1, "pipe_off wait timed out\n");
 998         }
 999 }
1000
1001 /*
1002  * ibx_digital_port_connected - is the specified port connected?
1003  * @dev_priv: i915 private structure
1004  * @port: the port to test
1005  *
1006  * Returns true if @port is connected, false otherwise.
1007  */
1008 bool ibx_digital_port_connected(struct drm_i915_private *dev_priv,
1009                                 struct intel_digital_port *port)
1010 {
1011         u32 bit;
1012
1013         if (HAS_PCH_IBX(dev_priv->dev)) {
1014                 switch(port->port) {
1015                 case PORT_B:
1016                         bit = SDE_PORTB_HOTPLUG;
1017                         break;
1018                 case PORT_C:
1019                         bit = SDE_PORTC_HOTPLUG;
1020                         break;
1021                 case PORT_D:
1022                         bit = SDE_PORTD_HOTPLUG;
1023                         break;
1024                 default:
1025                         return true;
1026                 }
1027         } else {
1028                 switch(port->port) {
1029                 case PORT_B:
1030                         bit = SDE_PORTB_HOTPLUG_CPT;
1031                         break;
1032                 case PORT_C:
1033                         bit = SDE_PORTC_HOTPLUG_CPT;
1034                         break;
1035                 case PORT_D:
1036                         bit = SDE_PORTD_HOTPLUG_CPT;
1037                         break;
1038                 default:
1039                         return true;
1040                 }
1041         }
1042
1043         return I915_READ(SDEISR) & bit;
1044 }
1045
1046 static const char *state_string(bool enabled)
1047 {
1048         return enabled ? "on" : "off";
1049 }
1050
1051 /* Only for pre-ILK configs */
1052 static void assert_pll(struct drm_i915_private *dev_priv,
1053                        enum pipe pipe, bool state)
1054 {
1055         int reg;
1056         u32 val;
1057         bool cur_state;
1058
1059         reg = DPLL(pipe);
1060         val = I915_READ(reg);
1061         cur_state = !!(val & DPLL_VCO_ENABLE);
1062         WARN(cur_state != state,
1063              "PLL state assertion failure (expected %s, current %s)\n",
1064              state_string(state), state_string(cur_state));
1065 }
1066 #define assert_pll_enabled(d, p) assert_pll(d, p, true)
1067 #define assert_pll_disabled(d, p) assert_pll(d, p, false)
1068
1069 /* For ILK+ */
1070 static void assert_pch_pll(struct drm_i915_private *dev_priv,
1071                            struct intel_pch_pll *pll,
1072                            struct intel_crtc *crtc,
1073                            bool state)
1074 {
1075         u32 val;
1076         bool cur_state;
1077
1078         if (HAS_PCH_LPT(dev_priv->dev)) {
1079                 DRM_DEBUG_DRIVER("LPT detected: skipping PCH PLL test\n");
1080                 return;
1081         }
1082
1083         if (WARN (!pll,
1084                   "asserting PCH PLL %s with no PLL\n", state_string(state)))
1085                 return;
1086
1087         val = I915_READ(pll->pll_reg);
1088         cur_state = !!(val & DPLL_VCO_ENABLE);
1089         WARN(cur_state != state,
1090              "PCH PLL state for reg %x assertion failure (expected %s, current %s), val=%08x\n",
1091              pll->pll_reg, state_string(state), state_string(cur_state), val);
1092
1093         /* Make sure the selected PLL is correctly attached to the transcoder */
1094         if (crtc && HAS_PCH_CPT(dev_priv->dev)) {
1095                 u32 pch_dpll;
1096
1097                 pch_dpll = I915_READ(PCH_DPLL_SEL);
1098                 cur_state = pll->pll_reg == _PCH_DPLL_B;
1099                 if (!WARN(((pch_dpll >> (4 * crtc->pipe)) & 1) != cur_state,
1100                           "PLL[%d] not attached to this transcoder %d: %08x\n",
1101                           cur_state, crtc->pipe, pch_dpll)) {
1102                         cur_state = !!(val >> (4*crtc->pipe + 3));
1103                         WARN(cur_state != state,
1104                              "PLL[%d] not %s on this transcoder %d: %08x\n",
1105                              pll->pll_reg == _PCH_DPLL_B,
1106                              state_string(state),
1107                              crtc->pipe,
1108                              val);
1109                 }
1110         }
1111 }
1112 #define assert_pch_pll_enabled(d, p, c) assert_pch_pll(d, p, c, true)
1113 #define assert_pch_pll_disabled(d, p, c) assert_pch_pll(d, p, c, false)
1114
1115 static void assert_fdi_tx(struct drm_i915_private *dev_priv,
1116                           enum pipe pipe, bool state)
1117 {
1118         int reg;
1119         u32 val;
1120         bool cur_state;
1121         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1122                                                                       pipe);
1123
1124         if (HAS_DDI(dev_priv->dev)) {
1125                 /* DDI does not have a specific FDI_TX register */
1126                 reg = TRANS_DDI_FUNC_CTL(cpu_transcoder);
1127                 val = I915_READ(reg);
1128                 cur_state = !!(val & TRANS_DDI_FUNC_ENABLE);
1129         } else {
1130                 reg = FDI_TX_CTL(pipe);
1131                 val = I915_READ(reg);
1132                 cur_state = !!(val & FDI_TX_ENABLE);
1133         }
1134         WARN(cur_state != state,
1135              "FDI TX state assertion failure (expected %s, current %s)\n",
1136              state_string(state), state_string(cur_state));
1137 }
1138 #define assert_fdi_tx_enabled(d, p) assert_fdi_tx(d, p, true)
1139 #define assert_fdi_tx_disabled(d, p) assert_fdi_tx(d, p, false)
1140
1141 static void assert_fdi_rx(struct drm_i915_private *dev_priv,
1142                           enum pipe pipe, bool state)
1143 {
1144         int reg;
1145         u32 val;
1146         bool cur_state;
1147
1148         reg = FDI_RX_CTL(pipe);
1149         val = I915_READ(reg);
1150         cur_state = !!(val & FDI_RX_ENABLE);
1151         WARN(cur_state != state,
1152              "FDI RX state assertion failure (expected %s, current %s)\n",
1153              state_string(state), state_string(cur_state));
1154 }
1155 #define assert_fdi_rx_enabled(d, p) assert_fdi_rx(d, p, true)
1156 #define assert_fdi_rx_disabled(d, p) assert_fdi_rx(d, p, false)
1157
1158 static void assert_fdi_tx_pll_enabled(struct drm_i915_private *dev_priv,
1159                                       enum pipe pipe)
1160 {
1161         int reg;
1162         u32 val;
1163
1164         /* ILK FDI PLL is always enabled */
1165         if (dev_priv->info->gen == 5)
1166                 return;
1167
1168         /* On Haswell, DDI ports are responsible for the FDI PLL setup */
1169         if (HAS_DDI(dev_priv->dev))
1170                 return;
1171
1172         reg = FDI_TX_CTL(pipe);
1173         val = I915_READ(reg);
1174         WARN(!(val & FDI_TX_PLL_ENABLE), "FDI TX PLL assertion failure, should be active but is disabled\n");
1175 }
1176
1177 static void assert_fdi_rx_pll_enabled(struct drm_i915_private *dev_priv,
1178                                       enum pipe pipe)
1179 {
1180         int reg;
1181         u32 val;
1182
1183         reg = FDI_RX_CTL(pipe);
1184         val = I915_READ(reg);
1185         WARN(!(val & FDI_RX_PLL_ENABLE), "FDI RX PLL assertion failure, should be active but is disabled\n");
1186 }
1187
1188 static void assert_panel_unlocked(struct drm_i915_private *dev_priv,
1189                                   enum pipe pipe)
1190 {
1191         int pp_reg, lvds_reg;
1192         u32 val;
1193         enum pipe panel_pipe = PIPE_A;
1194         bool locked = true;
1195
1196         if (HAS_PCH_SPLIT(dev_priv->dev)) {
1197                 pp_reg = PCH_PP_CONTROL;
1198                 lvds_reg = PCH_LVDS;
1199         } else {
1200                 pp_reg = PP_CONTROL;
1201                 lvds_reg = LVDS;
1202         }
1203
1204         val = I915_READ(pp_reg);
1205         if (!(val & PANEL_POWER_ON) ||
1206             ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS))
1207                 locked = false;
1208
1209         if (I915_READ(lvds_reg) & LVDS_PIPEB_SELECT)
1210                 panel_pipe = PIPE_B;
1211
1212         WARN(panel_pipe == pipe && locked,
1213              "panel assertion failure, pipe %c regs locked\n",
1214              pipe_name(pipe));
1215 }
1216
1217 void assert_pipe(struct drm_i915_private *dev_priv,
1218                  enum pipe pipe, bool state)
1219 {
1220         int reg;
1221         u32 val;
1222         bool cur_state;
1223         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1224                                                                       pipe);
1225
1226         /* if we need the pipe A quirk it must be always on */
1227         if (pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE)
1228                 state = true;
1229
1230         if (IS_HASWELL(dev_priv->dev) && cpu_transcoder != TRANSCODER_EDP &&
1231             !(I915_READ(HSW_PWR_WELL_DRIVER) & HSW_PWR_WELL_ENABLE)) {
1232                 cur_state = false;
1233         } else {
1234                 reg = PIPECONF(cpu_transcoder);
1235                 val = I915_READ(reg);
1236                 cur_state = !!(val & PIPECONF_ENABLE);
1237         }
1238
1239         WARN(cur_state != state,
1240              "pipe %c assertion failure (expected %s, current %s)\n",
1241              pipe_name(pipe), state_string(state), state_string(cur_state));
1242 }
1243
1244 static void assert_plane(struct drm_i915_private *dev_priv,
1245                          enum plane plane, bool state)
1246 {
1247         int reg;
1248         u32 val;
1249         bool cur_state;
1250
1251         reg = DSPCNTR(plane);
1252         val = I915_READ(reg);
1253         cur_state = !!(val & DISPLAY_PLANE_ENABLE);
1254         WARN(cur_state != state,
1255              "plane %c assertion failure (expected %s, current %s)\n",
1256              plane_name(plane), state_string(state), state_string(cur_state));
1257 }
1258
1259 #define assert_plane_enabled(d, p) assert_plane(d, p, true)
1260 #define assert_plane_disabled(d, p) assert_plane(d, p, false)
1261
1262 static void assert_planes_disabled(struct drm_i915_private *dev_priv,
1263                                    enum pipe pipe)
1264 {
1265         int reg, i;
1266         u32 val;
1267         int cur_pipe;
1268
1269         /* Planes are fixed to pipes on ILK+ */
1270         if (HAS_PCH_SPLIT(dev_priv->dev) || IS_VALLEYVIEW(dev_priv->dev)) {
1271                 reg = DSPCNTR(pipe);
1272                 val = I915_READ(reg);
1273                 WARN((val & DISPLAY_PLANE_ENABLE),
1274                      "plane %c assertion failure, should be disabled but not\n",
1275                      plane_name(pipe));
1276                 return;
1277         }
1278
1279         /* Need to check both planes against the pipe */
1280         for (i = 0; i < 2; i++) {
1281                 reg = DSPCNTR(i);
1282                 val = I915_READ(reg);
1283                 cur_pipe = (val & DISPPLANE_SEL_PIPE_MASK) >>
1284                         DISPPLANE_SEL_PIPE_SHIFT;
1285                 WARN((val & DISPLAY_PLANE_ENABLE) && pipe == cur_pipe,
1286                      "plane %c assertion failure, should be off on pipe %c but is still active\n",
1287                      plane_name(i), pipe_name(pipe));
1288         }
1289 }
1290
1291 static void assert_sprites_disabled(struct drm_i915_private *dev_priv,
1292                                     enum pipe pipe)
1293 {
1294         int reg, i;
1295         u32 val;
1296
1297         if (!IS_VALLEYVIEW(dev_priv->dev))
1298                 return;
1299
1300         /* Need to check both planes against the pipe */
1301         for (i = 0; i < dev_priv->num_plane; i++) {
1302                 reg = SPCNTR(pipe, i);
1303                 val = I915_READ(reg);
1304                 WARN((val & SP_ENABLE),
1305                      "sprite %d assertion failure, should be off on pipe %c but is still active\n",
1306                      pipe * 2 + i, pipe_name(pipe));
1307         }
1308 }
1309
1310 static void assert_pch_refclk_enabled(struct drm_i915_private *dev_priv)
1311 {
1312         u32 val;
1313         bool enabled;
1314
1315         if (HAS_PCH_LPT(dev_priv->dev)) {
1316                 DRM_DEBUG_DRIVER("LPT does not has PCH refclk, skipping check\n");
1317                 return;
1318         }
1319
1320         val = I915_READ(PCH_DREF_CONTROL);
1321         enabled = !!(val & (DREF_SSC_SOURCE_MASK | DREF_NONSPREAD_SOURCE_MASK |
1322                             DREF_SUPERSPREAD_SOURCE_MASK));
1323         WARN(!enabled, "PCH refclk assertion failure, should be active but is disabled\n");
1324 }
1325
1326 static void assert_transcoder_disabled(struct drm_i915_private *dev_priv,
1327                                        enum pipe pipe)
1328 {
1329         int reg;
1330         u32 val;
1331         bool enabled;
1332
1333         reg = TRANSCONF(pipe);
1334         val = I915_READ(reg);
1335         enabled = !!(val & TRANS_ENABLE);
1336         WARN(enabled,
1337              "transcoder assertion failed, should be off on pipe %c but is still active\n",
1338              pipe_name(pipe));
1339 }
1340
1341 static bool dp_pipe_enabled(struct drm_i915_private *dev_priv,
1342                             enum pipe pipe, u32 port_sel, u32 val)
1343 {
1344         if ((val & DP_PORT_EN) == 0)
1345                 return false;
1346
1347         if (HAS_PCH_CPT(dev_priv->dev)) {
1348                 u32     trans_dp_ctl_reg = TRANS_DP_CTL(pipe);
1349                 u32     trans_dp_ctl = I915_READ(trans_dp_ctl_reg);
1350                 if ((trans_dp_ctl & TRANS_DP_PORT_SEL_MASK) != port_sel)
1351                         return false;
1352         } else {
1353                 if ((val & DP_PIPE_MASK) != (pipe << 30))
1354                         return false;
1355         }
1356         return true;
1357 }
1358
1359 static bool hdmi_pipe_enabled(struct drm_i915_private *dev_priv,
1360                               enum pipe pipe, u32 val)
1361 {
1362         if ((val & SDVO_ENABLE) == 0)
1363                 return false;
1364
1365         if (HAS_PCH_CPT(dev_priv->dev)) {
1366                 if ((val & SDVO_PIPE_SEL_MASK_CPT) != SDVO_PIPE_SEL_CPT(pipe))
1367                         return false;
1368         } else {
1369                 if ((val & SDVO_PIPE_SEL_MASK) != SDVO_PIPE_SEL(pipe))
1370                         return false;
1371         }
1372         return true;
1373 }
1374
1375 static bool lvds_pipe_enabled(struct drm_i915_private *dev_priv,
1376                               enum pipe pipe, u32 val)
1377 {
1378         if ((val & LVDS_PORT_EN) == 0)
1379                 return false;
1380
1381         if (HAS_PCH_CPT(dev_priv->dev)) {
1382                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1383                         return false;
1384         } else {
1385                 if ((val & LVDS_PIPE_MASK) != LVDS_PIPE(pipe))
1386                         return false;
1387         }
1388         return true;
1389 }
1390
1391 static bool adpa_pipe_enabled(struct drm_i915_private *dev_priv,
1392                               enum pipe pipe, u32 val)
1393 {
1394         if ((val & ADPA_DAC_ENABLE) == 0)
1395                 return false;
1396         if (HAS_PCH_CPT(dev_priv->dev)) {
1397                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1398                         return false;
1399         } else {
1400                 if ((val & ADPA_PIPE_SELECT_MASK) != ADPA_PIPE_SELECT(pipe))
1401                         return false;
1402         }
1403         return true;
1404 }
1405
1406 static void assert_pch_dp_disabled(struct drm_i915_private *dev_priv,
1407                                    enum pipe pipe, int reg, u32 port_sel)
1408 {
1409         u32 val = I915_READ(reg);
1410         WARN(dp_pipe_enabled(dev_priv, pipe, port_sel, val),
1411              "PCH DP (0x%08x) enabled on transcoder %c, should be disabled\n",
1412              reg, pipe_name(pipe));
1413
1414         WARN(HAS_PCH_IBX(dev_priv->dev) && (val & DP_PORT_EN) == 0
1415              && (val & DP_PIPEB_SELECT),
1416              "IBX PCH dp port still using transcoder B\n");
1417 }
1418
1419 static void assert_pch_hdmi_disabled(struct drm_i915_private *dev_priv,
1420                                      enum pipe pipe, int reg)
1421 {
1422         u32 val = I915_READ(reg);
1423         WARN(hdmi_pipe_enabled(dev_priv, pipe, val),
1424              "PCH HDMI (0x%08x) enabled on transcoder %c, should be disabled\n",
1425              reg, pipe_name(pipe));
1426
1427         WARN(HAS_PCH_IBX(dev_priv->dev) && (val & SDVO_ENABLE) == 0
1428              && (val & SDVO_PIPE_B_SELECT),
1429              "IBX PCH hdmi port still using transcoder B\n");
1430 }
1431
1432 static void assert_pch_ports_disabled(struct drm_i915_private *dev_priv,
1433                                       enum pipe pipe)
1434 {
1435         int reg;
1436         u32 val;
1437
1438         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_B, TRANS_DP_PORT_SEL_B);
1439         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_C, TRANS_DP_PORT_SEL_C);
1440         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_D, TRANS_DP_PORT_SEL_D);
1441
1442         reg = PCH_ADPA;
1443         val = I915_READ(reg);
1444         WARN(adpa_pipe_enabled(dev_priv, pipe, val),
1445              "PCH VGA enabled on transcoder %c, should be disabled\n",
1446              pipe_name(pipe));
1447
1448         reg = PCH_LVDS;
1449         val = I915_READ(reg);
1450         WARN(lvds_pipe_enabled(dev_priv, pipe, val),
1451              "PCH LVDS enabled on transcoder %c, should be disabled\n",
1452              pipe_name(pipe));
1453
1454         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMIB);
1455         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMIC);
1456         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMID);
1457 }
1458
1459 /**
1460  * intel_enable_pll - enable a PLL
1461  * @dev_priv: i915 private structure
1462  * @pipe: pipe PLL to enable
1463  *
1464  * Enable @pipe's PLL so we can start pumping pixels from a plane.  Check to
1465  * make sure the PLL reg is writable first though, since the panel write
1466  * protect mechanism may be enabled.
1467  *
1468  * Note!  This is for pre-ILK only.
1469  *
1470  * Unfortunately needed by dvo_ns2501 since the dvo depends on it running.
1471  */
1472 static void intel_enable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1473 {
1474         int reg;
1475         u32 val;
1476
1477         /* No really, not for ILK+ */
1478         BUG_ON(!IS_VALLEYVIEW(dev_priv->dev) && dev_priv->info->gen >= 5);
1479
1480         /* PLL is protected by panel, make sure we can write it */
1481         if (IS_MOBILE(dev_priv->dev) && !IS_I830(dev_priv->dev))
1482                 assert_panel_unlocked(dev_priv, pipe);
1483
1484         reg = DPLL(pipe);
1485         val = I915_READ(reg);
1486         val |= DPLL_VCO_ENABLE;
1487
1488         /* We do this three times for luck */
1489         I915_WRITE(reg, val);
1490         POSTING_READ(reg);
1491         udelay(150); /* wait for warmup */
1492         I915_WRITE(reg, val);
1493         POSTING_READ(reg);
1494         udelay(150); /* wait for warmup */
1495         I915_WRITE(reg, val);
1496         POSTING_READ(reg);
1497         udelay(150); /* wait for warmup */
1498 }
1499
1500 /**
1501  * intel_disable_pll - disable a PLL
1502  * @dev_priv: i915 private structure
1503  * @pipe: pipe PLL to disable
1504  *
1505  * Disable the PLL for @pipe, making sure the pipe is off first.
1506  *
1507  * Note!  This is for pre-ILK only.
1508  */
1509 static void intel_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1510 {
1511         int reg;
1512         u32 val;
1513
1514         /* Don't disable pipe A or pipe A PLLs if needed */
1515         if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1516                 return;
1517
1518         /* Make sure the pipe isn't still relying on us */
1519         assert_pipe_disabled(dev_priv, pipe);
1520
1521         reg = DPLL(pipe);
1522         val = I915_READ(reg);
1523         val &= ~DPLL_VCO_ENABLE;
1524         I915_WRITE(reg, val);
1525         POSTING_READ(reg);
1526 }
1527
1528 /* SBI access */
1529 static void
1530 intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value,
1531                 enum intel_sbi_destination destination)
1532 {
1533         u32 tmp;
1534
1535         WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
1536
1537         if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
1538                                 100)) {
1539                 DRM_ERROR("timeout waiting for SBI to become ready\n");
1540                 return;
1541         }
1542
1543         I915_WRITE(SBI_ADDR, (reg << 16));
1544         I915_WRITE(SBI_DATA, value);
1545
1546         if (destination == SBI_ICLK)
1547                 tmp = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRWR;
1548         else
1549                 tmp = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IOWR;
1550         I915_WRITE(SBI_CTL_STAT, SBI_BUSY | tmp);
1551
1552         if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
1553                                 100)) {
1554                 DRM_ERROR("timeout waiting for SBI to complete write transaction\n");
1555                 return;
1556         }
1557 }
1558
1559 static u32
1560 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
1561                enum intel_sbi_destination destination)
1562 {
1563         u32 value = 0;
1564         WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
1565
1566         if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
1567                                 100)) {
1568                 DRM_ERROR("timeout waiting for SBI to become ready\n");
1569                 return 0;
1570         }
1571
1572         I915_WRITE(SBI_ADDR, (reg << 16));
1573
1574         if (destination == SBI_ICLK)
1575                 value = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRRD;
1576         else
1577                 value = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IORD;
1578         I915_WRITE(SBI_CTL_STAT, value | SBI_BUSY);
1579
1580         if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
1581                                 100)) {
1582                 DRM_ERROR("timeout waiting for SBI to complete read transaction\n");
1583                 return 0;
1584         }
1585
1586         return I915_READ(SBI_DATA);
1587 }
1588
1589 /**
1590  * ironlake_enable_pch_pll - enable PCH PLL
1591  * @dev_priv: i915 private structure
1592  * @pipe: pipe PLL to enable
1593  *
1594  * The PCH PLL needs to be enabled before the PCH transcoder, since it
1595  * drives the transcoder clock.
1596  */
1597 static void ironlake_enable_pch_pll(struct intel_crtc *intel_crtc)
1598 {
1599         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
1600         struct intel_pch_pll *pll;
1601         int reg;
1602         u32 val;
1603
1604         /* PCH PLLs only available on ILK, SNB and IVB */
1605         BUG_ON(dev_priv->info->gen < 5);
1606         pll = intel_crtc->pch_pll;
1607         if (pll == NULL)
1608                 return;
1609
1610         if (WARN_ON(pll->refcount == 0))
1611                 return;
1612
1613         DRM_DEBUG_KMS("enable PCH PLL %x (active %d, on? %d)for crtc %d\n",
1614                       pll->pll_reg, pll->active, pll->on,
1615                       intel_crtc->base.base.id);
1616
1617         /* PCH refclock must be enabled first */
1618         assert_pch_refclk_enabled(dev_priv);
1619
1620         if (pll->active++ && pll->on) {
1621                 assert_pch_pll_enabled(dev_priv, pll, NULL);
1622                 return;
1623         }
1624
1625         DRM_DEBUG_KMS("enabling PCH PLL %x\n", pll->pll_reg);
1626
1627         reg = pll->pll_reg;
1628         val = I915_READ(reg);
1629         val |= DPLL_VCO_ENABLE;
1630         I915_WRITE(reg, val);
1631         POSTING_READ(reg);
1632         udelay(200);
1633
1634         pll->on = true;
1635 }
1636
1637 static void intel_disable_pch_pll(struct intel_crtc *intel_crtc)
1638 {
1639         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
1640         struct intel_pch_pll *pll = intel_crtc->pch_pll;
1641         int reg;
1642         u32 val;
1643
1644         /* PCH only available on ILK+ */
1645         BUG_ON(dev_priv->info->gen < 5);
1646         if (pll == NULL)
1647                return;
1648
1649         if (WARN_ON(pll->refcount == 0))
1650                 return;
1651
1652         DRM_DEBUG_KMS("disable PCH PLL %x (active %d, on? %d) for crtc %d\n",
1653                       pll->pll_reg, pll->active, pll->on,
1654                       intel_crtc->base.base.id);
1655
1656         if (WARN_ON(pll->active == 0)) {
1657                 assert_pch_pll_disabled(dev_priv, pll, NULL);
1658                 return;
1659         }
1660
1661         if (--pll->active) {
1662                 assert_pch_pll_enabled(dev_priv, pll, NULL);
1663                 return;
1664         }
1665
1666         DRM_DEBUG_KMS("disabling PCH PLL %x\n", pll->pll_reg);
1667
1668         /* Make sure transcoder isn't still depending on us */
1669         assert_transcoder_disabled(dev_priv, intel_crtc->pipe);
1670
1671         reg = pll->pll_reg;
1672         val = I915_READ(reg);
1673         val &= ~DPLL_VCO_ENABLE;
1674         I915_WRITE(reg, val);
1675         POSTING_READ(reg);
1676         udelay(200);
1677
1678         pll->on = false;
1679 }
1680
1681 static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
1682                                            enum pipe pipe)
1683 {
1684         struct drm_device *dev = dev_priv->dev;
1685         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1686         uint32_t reg, val, pipeconf_val;
1687
1688         /* PCH only available on ILK+ */
1689         BUG_ON(dev_priv->info->gen < 5);
1690
1691         /* Make sure PCH DPLL is enabled */
1692         assert_pch_pll_enabled(dev_priv,
1693                                to_intel_crtc(crtc)->pch_pll,
1694                                to_intel_crtc(crtc));
1695
1696         /* FDI must be feeding us bits for PCH ports */
1697         assert_fdi_tx_enabled(dev_priv, pipe);
1698         assert_fdi_rx_enabled(dev_priv, pipe);
1699
1700         if (HAS_PCH_CPT(dev)) {
1701                 /* Workaround: Set the timing override bit before enabling the
1702                  * pch transcoder. */
1703                 reg = TRANS_CHICKEN2(pipe);
1704                 val = I915_READ(reg);
1705                 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
1706                 I915_WRITE(reg, val);
1707         }
1708
1709         reg = TRANSCONF(pipe);
1710         val = I915_READ(reg);
1711         pipeconf_val = I915_READ(PIPECONF(pipe));
1712
1713         if (HAS_PCH_IBX(dev_priv->dev)) {
1714                 /*
1715                  * make the BPC in transcoder be consistent with
1716                  * that in pipeconf reg.
1717                  */
1718                 val &= ~PIPECONF_BPC_MASK;
1719                 val |= pipeconf_val & PIPECONF_BPC_MASK;
1720         }
1721
1722         val &= ~TRANS_INTERLACE_MASK;
1723         if ((pipeconf_val & PIPECONF_INTERLACE_MASK) == PIPECONF_INTERLACED_ILK)
1724                 if (HAS_PCH_IBX(dev_priv->dev) &&
1725                     intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO))
1726                         val |= TRANS_LEGACY_INTERLACED_ILK;
1727                 else
1728                         val |= TRANS_INTERLACED;
1729         else
1730                 val |= TRANS_PROGRESSIVE;
1731
1732         I915_WRITE(reg, val | TRANS_ENABLE);
1733         if (wait_for(I915_READ(reg) & TRANS_STATE_ENABLE, 100))
1734                 DRM_ERROR("failed to enable transcoder %d\n", pipe);
1735 }
1736
1737 static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv,
1738                                       enum transcoder cpu_transcoder)
1739 {
1740         u32 val, pipeconf_val;
1741
1742         /* PCH only available on ILK+ */
1743         BUG_ON(dev_priv->info->gen < 5);
1744
1745         /* FDI must be feeding us bits for PCH ports */
1746         assert_fdi_tx_enabled(dev_priv, (enum pipe) cpu_transcoder);
1747         assert_fdi_rx_enabled(dev_priv, TRANSCODER_A);
1748
1749         /* Workaround: set timing override bit. */
1750         val = I915_READ(_TRANSA_CHICKEN2);
1751         val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
1752         I915_WRITE(_TRANSA_CHICKEN2, val);
1753
1754         val = TRANS_ENABLE;
1755         pipeconf_val = I915_READ(PIPECONF(cpu_transcoder));
1756
1757         if ((pipeconf_val & PIPECONF_INTERLACE_MASK_HSW) ==
1758             PIPECONF_INTERLACED_ILK)
1759                 val |= TRANS_INTERLACED;
1760         else
1761                 val |= TRANS_PROGRESSIVE;
1762
1763         I915_WRITE(TRANSCONF(TRANSCODER_A), val);
1764         if (wait_for(I915_READ(_TRANSACONF) & TRANS_STATE_ENABLE, 100))
1765                 DRM_ERROR("Failed to enable PCH transcoder\n");
1766 }
1767
1768 static void ironlake_disable_pch_transcoder(struct drm_i915_private *dev_priv,
1769                                             enum pipe pipe)
1770 {
1771         struct drm_device *dev = dev_priv->dev;
1772         uint32_t reg, val;
1773
1774         /* FDI relies on the transcoder */
1775         assert_fdi_tx_disabled(dev_priv, pipe);
1776         assert_fdi_rx_disabled(dev_priv, pipe);
1777
1778         /* Ports must be off as well */
1779         assert_pch_ports_disabled(dev_priv, pipe);
1780
1781         reg = TRANSCONF(pipe);
1782         val = I915_READ(reg);
1783         val &= ~TRANS_ENABLE;
1784         I915_WRITE(reg, val);
1785         /* wait for PCH transcoder off, transcoder state */
1786         if (wait_for((I915_READ(reg) & TRANS_STATE_ENABLE) == 0, 50))
1787                 DRM_ERROR("failed to disable transcoder %d\n", pipe);
1788
1789         if (!HAS_PCH_IBX(dev)) {
1790                 /* Workaround: Clear the timing override chicken bit again. */
1791                 reg = TRANS_CHICKEN2(pipe);
1792                 val = I915_READ(reg);
1793                 val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
1794                 I915_WRITE(reg, val);
1795         }
1796 }
1797
1798 static void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv)
1799 {
1800         u32 val;
1801
1802         val = I915_READ(_TRANSACONF);
1803         val &= ~TRANS_ENABLE;
1804         I915_WRITE(_TRANSACONF, val);
1805         /* wait for PCH transcoder off, transcoder state */
1806         if (wait_for((I915_READ(_TRANSACONF) & TRANS_STATE_ENABLE) == 0, 50))
1807                 DRM_ERROR("Failed to disable PCH transcoder\n");
1808
1809         /* Workaround: clear timing override bit. */
1810         val = I915_READ(_TRANSA_CHICKEN2);
1811         val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
1812         I915_WRITE(_TRANSA_CHICKEN2, val);
1813 }
1814
1815 /**
1816  * intel_enable_pipe - enable a pipe, asserting requirements
1817  * @dev_priv: i915 private structure
1818  * @pipe: pipe to enable
1819  * @pch_port: on ILK+, is this pipe driving a PCH port or not
1820  *
1821  * Enable @pipe, making sure that various hardware specific requirements
1822  * are met, if applicable, e.g. PLL enabled, LVDS pairs enabled, etc.
1823  *
1824  * @pipe should be %PIPE_A or %PIPE_B.
1825  *
1826  * Will wait until the pipe is actually running (i.e. first vblank) before
1827  * returning.
1828  */
1829 static void intel_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe,
1830                               bool pch_port)
1831 {
1832         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1833                                                                       pipe);
1834         enum pipe pch_transcoder;
1835         int reg;
1836         u32 val;
1837
1838         if (HAS_PCH_LPT(dev_priv->dev))
1839                 pch_transcoder = TRANSCODER_A;
1840         else
1841                 pch_transcoder = pipe;
1842
1843         /*
1844          * A pipe without a PLL won't actually be able to drive bits from
1845          * a plane.  On ILK+ the pipe PLLs are integrated, so we don't
1846          * need the check.
1847          */
1848         if (!HAS_PCH_SPLIT(dev_priv->dev))
1849                 assert_pll_enabled(dev_priv, pipe);
1850         else {
1851                 if (pch_port) {
1852                         /* if driving the PCH, we need FDI enabled */
1853                         assert_fdi_rx_pll_enabled(dev_priv, pch_transcoder);
1854                         assert_fdi_tx_pll_enabled(dev_priv,
1855                                                   (enum pipe) cpu_transcoder);
1856                 }
1857                 /* FIXME: assert CPU port conditions for SNB+ */
1858         }
1859
1860         reg = PIPECONF(cpu_transcoder);
1861         val = I915_READ(reg);
1862         if (val & PIPECONF_ENABLE)
1863                 return;
1864
1865         I915_WRITE(reg, val | PIPECONF_ENABLE);
1866         intel_wait_for_vblank(dev_priv->dev, pipe);
1867 }
1868
1869 /**
1870  * intel_disable_pipe - disable a pipe, asserting requirements
1871  * @dev_priv: i915 private structure
1872  * @pipe: pipe to disable
1873  *
1874  * Disable @pipe, making sure that various hardware specific requirements
1875  * are met, if applicable, e.g. plane disabled, panel fitter off, etc.
1876  *
1877  * @pipe should be %PIPE_A or %PIPE_B.
1878  *
1879  * Will wait until the pipe has shut down before returning.
1880  */
1881 static void intel_disable_pipe(struct drm_i915_private *dev_priv,
1882                                enum pipe pipe)
1883 {
1884         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1885                                                                       pipe);
1886         int reg;
1887         u32 val;
1888
1889         /*
1890          * Make sure planes won't keep trying to pump pixels to us,
1891          * or we might hang the display.
1892          */
1893         assert_planes_disabled(dev_priv, pipe);
1894         assert_sprites_disabled(dev_priv, pipe);
1895
1896         /* Don't disable pipe A or pipe A PLLs if needed */
1897         if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1898                 return;
1899
1900         reg = PIPECONF(cpu_transcoder);
1901         val = I915_READ(reg);
1902         if ((val & PIPECONF_ENABLE) == 0)
1903                 return;
1904
1905         I915_WRITE(reg, val & ~PIPECONF_ENABLE);
1906         intel_wait_for_pipe_off(dev_priv->dev, pipe);
1907 }
1908
1909 /*
1910  * Plane regs are double buffered, going from enabled->disabled needs a
1911  * trigger in order to latch.  The display address reg provides this.
1912  */
1913 void intel_flush_display_plane(struct drm_i915_private *dev_priv,
1914                                       enum plane plane)
1915 {
1916         if (dev_priv->info->gen >= 4)
1917                 I915_WRITE(DSPSURF(plane), I915_READ(DSPSURF(plane)));
1918         else
1919                 I915_WRITE(DSPADDR(plane), I915_READ(DSPADDR(plane)));
1920 }
1921
1922 /**
1923  * intel_enable_plane - enable a display plane on a given pipe
1924  * @dev_priv: i915 private structure
1925  * @plane: plane to enable
1926  * @pipe: pipe being fed
1927  *
1928  * Enable @plane on @pipe, making sure that @pipe is running first.
1929  */
1930 static void intel_enable_plane(struct drm_i915_private *dev_priv,
1931                                enum plane plane, enum pipe pipe)
1932 {
1933         int reg;
1934         u32 val;
1935
1936         /* If the pipe isn't enabled, we can't pump pixels and may hang */
1937         assert_pipe_enabled(dev_priv, pipe);
1938
1939         reg = DSPCNTR(plane);
1940         val = I915_READ(reg);
1941         if (val & DISPLAY_PLANE_ENABLE)
1942                 return;
1943
1944         I915_WRITE(reg, val | DISPLAY_PLANE_ENABLE);
1945         intel_flush_display_plane(dev_priv, plane);
1946         intel_wait_for_vblank(dev_priv->dev, pipe);
1947 }
1948
1949 /**
1950  * intel_disable_plane - disable a display plane
1951  * @dev_priv: i915 private structure
1952  * @plane: plane to disable
1953  * @pipe: pipe consuming the data
1954  *
1955  * Disable @plane; should be an independent operation.
1956  */
1957 static void intel_disable_plane(struct drm_i915_private *dev_priv,
1958                                 enum plane plane, enum pipe pipe)
1959 {
1960         int reg;
1961         u32 val;
1962
1963         reg = DSPCNTR(plane);
1964         val = I915_READ(reg);
1965         if ((val & DISPLAY_PLANE_ENABLE) == 0)
1966                 return;
1967
1968         I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
1969         intel_flush_display_plane(dev_priv, plane);
1970         intel_wait_for_vblank(dev_priv->dev, pipe);
1971 }
1972
1973 static bool need_vtd_wa(struct drm_device *dev)
1974 {
1975 #ifdef CONFIG_INTEL_IOMMU
1976         if (INTEL_INFO(dev)->gen >= 6 && intel_iommu_gfx_mapped)
1977                 return true;
1978 #endif
1979         return false;
1980 }
1981
1982 int
1983 intel_pin_and_fence_fb_obj(struct drm_device *dev,
1984                            struct drm_i915_gem_object *obj,
1985                            struct intel_ring_buffer *pipelined)
1986 {
1987         struct drm_i915_private *dev_priv = dev->dev_private;
1988         u32 alignment;
1989         int ret;
1990
1991         switch (obj->tiling_mode) {
1992         case I915_TILING_NONE:
1993                 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1994                         alignment = 128 * 1024;
1995                 else if (INTEL_INFO(dev)->gen >= 4)
1996                         alignment = 4 * 1024;
1997                 else
1998                         alignment = 64 * 1024;
1999                 break;
2000         case I915_TILING_X:
2001                 /* pin() will align the object as required by fence */
2002                 alignment = 0;
2003                 break;
2004         case I915_TILING_Y:
2005                 /* Despite that we check this in framebuffer_init userspace can
2006                  * screw us over and change the tiling after the fact. Only
2007                  * pinned buffers can't change their tiling. */
2008                 DRM_DEBUG_DRIVER("Y tiled not allowed for scan out buffers\n");
2009                 return -EINVAL;
2010         default:
2011                 BUG();
2012         }
2013
2014         /* Note that the w/a also requires 64 PTE of padding following the
2015          * bo. We currently fill all unused PTE with the shadow page and so
2016          * we should always have valid PTE following the scanout preventing
2017          * the VT-d warning.
2018          */
2019         if (need_vtd_wa(dev) && alignment < 256 * 1024)
2020                 alignment = 256 * 1024;
2021
2022         dev_priv->mm.interruptible = false;
2023         ret = i915_gem_object_pin_to_display_plane(obj, alignment, pipelined);
2024         if (ret)
2025                 goto err_interruptible;
2026
2027         /* Install a fence for tiled scan-out. Pre-i965 always needs a
2028          * fence, whereas 965+ only requires a fence if using
2029          * framebuffer compression.  For simplicity, we always install
2030          * a fence as the cost is not that onerous.
2031          */
2032         ret = i915_gem_object_get_fence(obj);
2033         if (ret)
2034                 goto err_unpin;
2035
2036         i915_gem_object_pin_fence(obj);
2037
2038         dev_priv->mm.interruptible = true;
2039         return 0;
2040
2041 err_unpin:
2042         i915_gem_object_unpin(obj);
2043 err_interruptible:
2044         dev_priv->mm.interruptible = true;
2045         return ret;
2046 }
2047
2048 void intel_unpin_fb_obj(struct drm_i915_gem_object *obj)
2049 {
2050         i915_gem_object_unpin_fence(obj);
2051         i915_gem_object_unpin(obj);
2052 }
2053
2054 /* Computes the linear offset to the base tile and adjusts x, y. bytes per pixel
2055  * is assumed to be a power-of-two. */
2056 unsigned long intel_gen4_compute_page_offset(int *x, int *y,
2057                                              unsigned int tiling_mode,
2058                                              unsigned int cpp,
2059                                              unsigned int pitch)
2060 {
2061         if (tiling_mode != I915_TILING_NONE) {
2062                 unsigned int tile_rows, tiles;
2063
2064                 tile_rows = *y / 8;
2065                 *y %= 8;
2066
2067                 tiles = *x / (512/cpp);
2068                 *x %= 512/cpp;
2069
2070                 return tile_rows * pitch * 8 + tiles * 4096;
2071         } else {
2072                 unsigned int offset;
2073
2074                 offset = *y * pitch + *x * cpp;
2075                 *y = 0;
2076                 *x = (offset & 4095) / cpp;
2077                 return offset & -4096;
2078         }
2079 }
2080
2081 static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
2082                              int x, int y)
2083 {
2084         struct drm_device *dev = crtc->dev;
2085         struct drm_i915_private *dev_priv = dev->dev_private;
2086         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2087         struct intel_framebuffer *intel_fb;
2088         struct drm_i915_gem_object *obj;
2089         int plane = intel_crtc->plane;
2090         unsigned long linear_offset;
2091         u32 dspcntr;
2092         u32 reg;
2093
2094         switch (plane) {
2095         case 0:
2096         case 1:
2097                 break;
2098         default:
2099                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
2100                 return -EINVAL;
2101         }
2102
2103         intel_fb = to_intel_framebuffer(fb);
2104         obj = intel_fb->obj;
2105
2106         reg = DSPCNTR(plane);
2107         dspcntr = I915_READ(reg);
2108         /* Mask out pixel format bits in case we change it */
2109         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
2110         switch (fb->pixel_format) {
2111         case DRM_FORMAT_C8:
2112                 dspcntr |= DISPPLANE_8BPP;
2113                 break;
2114         case DRM_FORMAT_XRGB1555:
2115         case DRM_FORMAT_ARGB1555:
2116                 dspcntr |= DISPPLANE_BGRX555;
2117                 break;
2118         case DRM_FORMAT_RGB565:
2119                 dspcntr |= DISPPLANE_BGRX565;
2120                 break;
2121         case DRM_FORMAT_XRGB8888:
2122         case DRM_FORMAT_ARGB8888:
2123                 dspcntr |= DISPPLANE_BGRX888;
2124                 break;
2125         case DRM_FORMAT_XBGR8888:
2126         case DRM_FORMAT_ABGR8888:
2127                 dspcntr |= DISPPLANE_RGBX888;
2128                 break;
2129         case DRM_FORMAT_XRGB2101010:
2130         case DRM_FORMAT_ARGB2101010:
2131                 dspcntr |= DISPPLANE_BGRX101010;
2132                 break;
2133         case DRM_FORMAT_XBGR2101010:
2134         case DRM_FORMAT_ABGR2101010:
2135                 dspcntr |= DISPPLANE_RGBX101010;
2136                 break;
2137         default:
2138                 BUG();
2139         }
2140
2141         if (INTEL_INFO(dev)->gen >= 4) {
2142                 if (obj->tiling_mode != I915_TILING_NONE)
2143                         dspcntr |= DISPPLANE_TILED;
2144                 else
2145                         dspcntr &= ~DISPPLANE_TILED;
2146         }
2147
2148         I915_WRITE(reg, dspcntr);
2149
2150         linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2151
2152         if (INTEL_INFO(dev)->gen >= 4) {
2153                 intel_crtc->dspaddr_offset =
2154                         intel_gen4_compute_page_offset(&x, &y, obj->tiling_mode,
2155                                                        fb->bits_per_pixel / 8,
2156                                                        fb->pitches[0]);
2157                 linear_offset -= intel_crtc->dspaddr_offset;
2158         } else {
2159                 intel_crtc->dspaddr_offset = linear_offset;
2160         }
2161
2162         DRM_DEBUG_KMS("Writing base %08X %08lX %d %d %d\n",
2163                       obj->gtt_offset, linear_offset, x, y, fb->pitches[0]);
2164         I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2165         if (INTEL_INFO(dev)->gen >= 4) {
2166                 I915_MODIFY_DISPBASE(DSPSURF(plane),
2167                                      obj->gtt_offset + intel_crtc->dspaddr_offset);
2168                 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2169                 I915_WRITE(DSPLINOFF(plane), linear_offset);
2170         } else
2171                 I915_WRITE(DSPADDR(plane), obj->gtt_offset + linear_offset);
2172         POSTING_READ(reg);
2173
2174         return 0;
2175 }
2176
2177 static int ironlake_update_plane(struct drm_crtc *crtc,
2178                                  struct drm_framebuffer *fb, int x, int y)
2179 {
2180         struct drm_device *dev = crtc->dev;
2181         struct drm_i915_private *dev_priv = dev->dev_private;
2182         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2183         struct intel_framebuffer *intel_fb;
2184         struct drm_i915_gem_object *obj;
2185         int plane = intel_crtc->plane;
2186         unsigned long linear_offset;
2187         u32 dspcntr;
2188         u32 reg;
2189
2190         switch (plane) {
2191         case 0:
2192         case 1:
2193         case 2:
2194                 break;
2195         default:
2196                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
2197                 return -EINVAL;
2198         }
2199
2200         intel_fb = to_intel_framebuffer(fb);
2201         obj = intel_fb->obj;
2202
2203         reg = DSPCNTR(plane);
2204         dspcntr = I915_READ(reg);
2205         /* Mask out pixel format bits in case we change it */
2206         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
2207         switch (fb->pixel_format) {
2208         case DRM_FORMAT_C8:
2209                 dspcntr |= DISPPLANE_8BPP;
2210                 break;
2211         case DRM_FORMAT_RGB565:
2212                 dspcntr |= DISPPLANE_BGRX565;
2213                 break;
2214         case DRM_FORMAT_XRGB8888:
2215         case DRM_FORMAT_ARGB8888:
2216                 dspcntr |= DISPPLANE_BGRX888;
2217                 break;
2218         case DRM_FORMAT_XBGR8888:
2219         case DRM_FORMAT_ABGR8888:
2220                 dspcntr |= DISPPLANE_RGBX888;
2221                 break;
2222         case DRM_FORMAT_XRGB2101010:
2223         case DRM_FORMAT_ARGB2101010:
2224                 dspcntr |= DISPPLANE_BGRX101010;
2225                 break;
2226         case DRM_FORMAT_XBGR2101010:
2227         case DRM_FORMAT_ABGR2101010:
2228                 dspcntr |= DISPPLANE_RGBX101010;
2229                 break;
2230         default:
2231                 BUG();
2232         }
2233
2234         if (obj->tiling_mode != I915_TILING_NONE)
2235                 dspcntr |= DISPPLANE_TILED;
2236         else
2237                 dspcntr &= ~DISPPLANE_TILED;
2238
2239         /* must disable */
2240         dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
2241
2242         I915_WRITE(reg, dspcntr);
2243
2244         linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2245         intel_crtc->dspaddr_offset =
2246                 intel_gen4_compute_page_offset(&x, &y, obj->tiling_mode,
2247                                                fb->bits_per_pixel / 8,
2248                                                fb->pitches[0]);
2249         linear_offset -= intel_crtc->dspaddr_offset;
2250
2251         DRM_DEBUG_KMS("Writing base %08X %08lX %d %d %d\n",
2252                       obj->gtt_offset, linear_offset, x, y, fb->pitches[0]);
2253         I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2254         I915_MODIFY_DISPBASE(DSPSURF(plane),
2255                              obj->gtt_offset + intel_crtc->dspaddr_offset);
2256         if (IS_HASWELL(dev)) {
2257                 I915_WRITE(DSPOFFSET(plane), (y << 16) | x);
2258         } else {
2259                 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2260                 I915_WRITE(DSPLINOFF(plane), linear_offset);
2261         }
2262         POSTING_READ(reg);
2263
2264         return 0;
2265 }
2266
2267 /* Assume fb object is pinned & idle & fenced and just update base pointers */
2268 static int
2269 intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
2270                            int x, int y, enum mode_set_atomic state)
2271 {
2272         struct drm_device *dev = crtc->dev;
2273         struct drm_i915_private *dev_priv = dev->dev_private;
2274
2275         if (dev_priv->display.disable_fbc)
2276                 dev_priv->display.disable_fbc(dev);
2277         intel_increase_pllclock(crtc);
2278
2279         return dev_priv->display.update_plane(crtc, fb, x, y);
2280 }
2281
2282 void intel_display_handle_reset(struct drm_device *dev)
2283 {
2284         struct drm_i915_private *dev_priv = dev->dev_private;
2285         struct drm_crtc *crtc;
2286
2287         /*
2288          * Flips in the rings have been nuked by the reset,
2289          * so complete all pending flips so that user space
2290          * will get its events and not get stuck.
2291          *
2292          * Also update the base address of all primary
2293          * planes to the the last fb to make sure we're
2294          * showing the correct fb after a reset.
2295          *
2296          * Need to make two loops over the crtcs so that we
2297          * don't try to grab a crtc mutex before the
2298          * pending_flip_queue really got woken up.
2299          */
2300
2301         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
2302                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2303                 enum plane plane = intel_crtc->plane;
2304
2305                 intel_prepare_page_flip(dev, plane);
2306                 intel_finish_page_flip_plane(dev, plane);
2307         }
2308
2309         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
2310                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2311
2312                 mutex_lock(&crtc->mutex);
2313                 if (intel_crtc->active)
2314                         dev_priv->display.update_plane(crtc, crtc->fb,
2315                                                        crtc->x, crtc->y);
2316                 mutex_unlock(&crtc->mutex);
2317         }
2318 }
2319
2320 static int
2321 intel_finish_fb(struct drm_framebuffer *old_fb)
2322 {
2323         struct drm_i915_gem_object *obj = to_intel_framebuffer(old_fb)->obj;
2324         struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2325         bool was_interruptible = dev_priv->mm.interruptible;
2326         int ret;
2327
2328         /* Big Hammer, we also need to ensure that any pending
2329          * MI_WAIT_FOR_EVENT inside a user batch buffer on the
2330          * current scanout is retired before unpinning the old
2331          * framebuffer.
2332          *
2333          * This should only fail upon a hung GPU, in which case we
2334          * can safely continue.
2335          */
2336         dev_priv->mm.interruptible = false;
2337         ret = i915_gem_object_finish_gpu(obj);
2338         dev_priv->mm.interruptible = was_interruptible;
2339
2340         return ret;
2341 }
2342
2343 static void intel_crtc_update_sarea_pos(struct drm_crtc *crtc, int x, int y)
2344 {
2345         struct drm_device *dev = crtc->dev;
2346         struct drm_i915_master_private *master_priv;
2347         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2348
2349         if (!dev->primary->master)
2350                 return;
2351
2352         master_priv = dev->primary->master->driver_priv;
2353         if (!master_priv->sarea_priv)
2354                 return;
2355
2356         switch (intel_crtc->pipe) {
2357         case 0:
2358                 master_priv->sarea_priv->pipeA_x = x;
2359                 master_priv->sarea_priv->pipeA_y = y;
2360                 break;
2361         case 1:
2362                 master_priv->sarea_priv->pipeB_x = x;
2363                 master_priv->sarea_priv->pipeB_y = y;
2364                 break;
2365         default:
2366                 break;
2367         }
2368 }
2369
2370 static int
2371 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
2372                     struct drm_framebuffer *fb)
2373 {
2374         struct drm_device *dev = crtc->dev;
2375         struct drm_i915_private *dev_priv = dev->dev_private;
2376         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2377         struct drm_framebuffer *old_fb;
2378         int ret;
2379
2380         /* no fb bound */
2381         if (!fb) {
2382                 DRM_ERROR("No FB bound\n");
2383                 return 0;
2384         }
2385
2386         if (intel_crtc->plane > INTEL_INFO(dev)->num_pipes) {
2387                 DRM_ERROR("no plane for crtc: plane %d, num_pipes %d\n",
2388                                 intel_crtc->plane,
2389                                 INTEL_INFO(dev)->num_pipes);
2390                 return -EINVAL;
2391         }
2392
2393         mutex_lock(&dev->struct_mutex);
2394         ret = intel_pin_and_fence_fb_obj(dev,
2395                                          to_intel_framebuffer(fb)->obj,
2396                                          NULL);
2397         if (ret != 0) {
2398                 mutex_unlock(&dev->struct_mutex);
2399                 DRM_ERROR("pin & fence failed\n");
2400                 return ret;
2401         }
2402
2403         ret = dev_priv->display.update_plane(crtc, fb, x, y);
2404         if (ret) {
2405                 intel_unpin_fb_obj(to_intel_framebuffer(fb)->obj);
2406                 mutex_unlock(&dev->struct_mutex);
2407                 DRM_ERROR("failed to update base address\n");
2408                 return ret;
2409         }
2410
2411         old_fb = crtc->fb;
2412         crtc->fb = fb;
2413         crtc->x = x;
2414         crtc->y = y;
2415
2416         if (old_fb) {
2417                 intel_wait_for_vblank(dev, intel_crtc->pipe);
2418                 intel_unpin_fb_obj(to_intel_framebuffer(old_fb)->obj);
2419         }
2420
2421         intel_update_fbc(dev);
2422         mutex_unlock(&dev->struct_mutex);
2423
2424         intel_crtc_update_sarea_pos(crtc, x, y);
2425
2426         return 0;
2427 }
2428
2429 static void intel_fdi_normal_train(struct drm_crtc *crtc)
2430 {
2431         struct drm_device *dev = crtc->dev;
2432         struct drm_i915_private *dev_priv = dev->dev_private;
2433         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2434         int pipe = intel_crtc->pipe;
2435         u32 reg, temp;
2436
2437         /* enable normal train */
2438         reg = FDI_TX_CTL(pipe);
2439         temp = I915_READ(reg);
2440         if (IS_IVYBRIDGE(dev)) {
2441                 temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2442                 temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
2443         } else {
2444                 temp &= ~FDI_LINK_TRAIN_NONE;
2445                 temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
2446         }
2447         I915_WRITE(reg, temp);
2448
2449         reg = FDI_RX_CTL(pipe);
2450         temp = I915_READ(reg);
2451         if (HAS_PCH_CPT(dev)) {
2452                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2453                 temp |= FDI_LINK_TRAIN_NORMAL_CPT;
2454         } else {
2455                 temp &= ~FDI_LINK_TRAIN_NONE;
2456                 temp |= FDI_LINK_TRAIN_NONE;
2457         }
2458         I915_WRITE(reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
2459
2460         /* wait one idle pattern time */
2461         POSTING_READ(reg);
2462         udelay(1000);
2463
2464         /* IVB wants error correction enabled */
2465         if (IS_IVYBRIDGE(dev))
2466                 I915_WRITE(reg, I915_READ(reg) | FDI_FS_ERRC_ENABLE |
2467                            FDI_FE_ERRC_ENABLE);
2468 }
2469
2470 static void ivb_modeset_global_resources(struct drm_device *dev)
2471 {
2472         struct drm_i915_private *dev_priv = dev->dev_private;
2473         struct intel_crtc *pipe_B_crtc =
2474                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_B]);
2475         struct intel_crtc *pipe_C_crtc =
2476                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_C]);
2477         uint32_t temp;
2478
2479         /* When everything is off disable fdi C so that we could enable fdi B
2480          * with all lanes. XXX: This misses the case where a pipe is not using
2481          * any pch resources and so doesn't need any fdi lanes. */
2482         if (!pipe_B_crtc->base.enabled && !pipe_C_crtc->base.enabled) {
2483                 WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
2484                 WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
2485
2486                 temp = I915_READ(SOUTH_CHICKEN1);
2487                 temp &= ~FDI_BC_BIFURCATION_SELECT;
2488                 DRM_DEBUG_KMS("disabling fdi C rx\n");
2489                 I915_WRITE(SOUTH_CHICKEN1, temp);
2490         }
2491 }
2492
2493 /* The FDI link training functions for ILK/Ibexpeak. */
2494 static void ironlake_fdi_link_train(struct drm_crtc *crtc)
2495 {
2496         struct drm_device *dev = crtc->dev;
2497         struct drm_i915_private *dev_priv = dev->dev_private;
2498         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2499         int pipe = intel_crtc->pipe;
2500         int plane = intel_crtc->plane;
2501         u32 reg, temp, tries;
2502
2503         /* FDI needs bits from pipe & plane first */
2504         assert_pipe_enabled(dev_priv, pipe);
2505         assert_plane_enabled(dev_priv, plane);
2506
2507         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2508            for train result */
2509         reg = FDI_RX_IMR(pipe);
2510         temp = I915_READ(reg);
2511         temp &= ~FDI_RX_SYMBOL_LOCK;
2512         temp &= ~FDI_RX_BIT_LOCK;
2513         I915_WRITE(reg, temp);
2514         I915_READ(reg);
2515         udelay(150);
2516
2517         /* enable CPU FDI TX and PCH FDI RX */
2518         reg = FDI_TX_CTL(pipe);
2519         temp = I915_READ(reg);
2520         temp &= ~(7 << 19);
2521         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2522         temp &= ~FDI_LINK_TRAIN_NONE;
2523         temp |= FDI_LINK_TRAIN_PATTERN_1;
2524         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2525
2526         reg = FDI_RX_CTL(pipe);
2527         temp = I915_READ(reg);
2528         temp &= ~FDI_LINK_TRAIN_NONE;
2529         temp |= FDI_LINK_TRAIN_PATTERN_1;
2530         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2531
2532         POSTING_READ(reg);
2533         udelay(150);
2534
2535         /* Ironlake workaround, enable clock pointer after FDI enable*/
2536         I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2537         I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR |
2538                    FDI_RX_PHASE_SYNC_POINTER_EN);
2539
2540         reg = FDI_RX_IIR(pipe);
2541         for (tries = 0; tries < 5; tries++) {
2542                 temp = I915_READ(reg);
2543                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2544
2545                 if ((temp & FDI_RX_BIT_LOCK)) {
2546                         DRM_DEBUG_KMS("FDI train 1 done.\n");
2547                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2548                         break;
2549                 }
2550         }
2551         if (tries == 5)
2552                 DRM_ERROR("FDI train 1 fail!\n");
2553
2554         /* Train 2 */
2555         reg = FDI_TX_CTL(pipe);
2556         temp = I915_READ(reg);
2557         temp &= ~FDI_LINK_TRAIN_NONE;
2558         temp |= FDI_LINK_TRAIN_PATTERN_2;
2559         I915_WRITE(reg, temp);
2560
2561         reg = FDI_RX_CTL(pipe);
2562         temp = I915_READ(reg);
2563         temp &= ~FDI_LINK_TRAIN_NONE;
2564         temp |= FDI_LINK_TRAIN_PATTERN_2;
2565         I915_WRITE(reg, temp);
2566
2567         POSTING_READ(reg);
2568         udelay(150);
2569
2570         reg = FDI_RX_IIR(pipe);
2571         for (tries = 0; tries < 5; tries++) {
2572                 temp = I915_READ(reg);
2573                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2574
2575                 if (temp & FDI_RX_SYMBOL_LOCK) {
2576                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2577                         DRM_DEBUG_KMS("FDI train 2 done.\n");
2578                         break;
2579                 }
2580         }
2581         if (tries == 5)
2582                 DRM_ERROR("FDI train 2 fail!\n");
2583
2584         DRM_DEBUG_KMS("FDI train done\n");
2585
2586 }
2587
2588 static const int snb_b_fdi_train_param[] = {
2589         FDI_LINK_TRAIN_400MV_0DB_SNB_B,
2590         FDI_LINK_TRAIN_400MV_6DB_SNB_B,
2591         FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
2592         FDI_LINK_TRAIN_800MV_0DB_SNB_B,
2593 };
2594
2595 /* The FDI link training functions for SNB/Cougarpoint. */
2596 static void gen6_fdi_link_train(struct drm_crtc *crtc)
2597 {
2598         struct drm_device *dev = crtc->dev;
2599         struct drm_i915_private *dev_priv = dev->dev_private;
2600         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2601         int pipe = intel_crtc->pipe;
2602         u32 reg, temp, i, retry;
2603
2604         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2605            for train result */
2606         reg = FDI_RX_IMR(pipe);
2607         temp = I915_READ(reg);
2608         temp &= ~FDI_RX_SYMBOL_LOCK;
2609         temp &= ~FDI_RX_BIT_LOCK;
2610         I915_WRITE(reg, temp);
2611
2612         POSTING_READ(reg);
2613         udelay(150);
2614
2615         /* enable CPU FDI TX and PCH FDI RX */
2616         reg = FDI_TX_CTL(pipe);
2617         temp = I915_READ(reg);
2618         temp &= ~(7 << 19);
2619         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2620         temp &= ~FDI_LINK_TRAIN_NONE;
2621         temp |= FDI_LINK_TRAIN_PATTERN_1;
2622         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2623         /* SNB-B */
2624         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2625         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2626
2627         I915_WRITE(FDI_RX_MISC(pipe),
2628                    FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
2629
2630         reg = FDI_RX_CTL(pipe);
2631         temp = I915_READ(reg);
2632         if (HAS_PCH_CPT(dev)) {
2633                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2634                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2635         } else {
2636                 temp &= ~FDI_LINK_TRAIN_NONE;
2637                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2638         }
2639         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2640
2641         POSTING_READ(reg);
2642         udelay(150);
2643
2644         for (i = 0; i < 4; i++) {
2645                 reg = FDI_TX_CTL(pipe);
2646                 temp = I915_READ(reg);
2647                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2648                 temp |= snb_b_fdi_train_param[i];
2649                 I915_WRITE(reg, temp);
2650
2651                 POSTING_READ(reg);
2652                 udelay(500);
2653
2654                 for (retry = 0; retry < 5; retry++) {
2655                         reg = FDI_RX_IIR(pipe);
2656                         temp = I915_READ(reg);
2657                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2658                         if (temp & FDI_RX_BIT_LOCK) {
2659                                 I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2660                                 DRM_DEBUG_KMS("FDI train 1 done.\n");
2661                                 break;
2662                         }
2663                         udelay(50);
2664                 }
2665                 if (retry < 5)
2666                         break;
2667         }
2668         if (i == 4)
2669                 DRM_ERROR("FDI train 1 fail!\n");
2670
2671         /* Train 2 */
2672         reg = FDI_TX_CTL(pipe);
2673         temp = I915_READ(reg);
2674         temp &= ~FDI_LINK_TRAIN_NONE;
2675         temp |= FDI_LINK_TRAIN_PATTERN_2;
2676         if (IS_GEN6(dev)) {
2677                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2678                 /* SNB-B */
2679                 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2680         }
2681         I915_WRITE(reg, temp);
2682
2683         reg = FDI_RX_CTL(pipe);
2684         temp = I915_READ(reg);
2685         if (HAS_PCH_CPT(dev)) {
2686                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2687                 temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2688         } else {
2689                 temp &= ~FDI_LINK_TRAIN_NONE;
2690                 temp |= FDI_LINK_TRAIN_PATTERN_2;
2691         }
2692         I915_WRITE(reg, temp);
2693
2694         POSTING_READ(reg);
2695         udelay(150);
2696
2697         for (i = 0; i < 4; i++) {
2698                 reg = FDI_TX_CTL(pipe);
2699                 temp = I915_READ(reg);
2700                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2701                 temp |= snb_b_fdi_train_param[i];
2702                 I915_WRITE(reg, temp);
2703
2704                 POSTING_READ(reg);
2705                 udelay(500);
2706
2707                 for (retry = 0; retry < 5; retry++) {
2708                         reg = FDI_RX_IIR(pipe);
2709                         temp = I915_READ(reg);
2710                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2711                         if (temp & FDI_RX_SYMBOL_LOCK) {
2712                                 I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2713                                 DRM_DEBUG_KMS("FDI train 2 done.\n");
2714                                 break;
2715                         }
2716                         udelay(50);
2717                 }
2718                 if (retry < 5)
2719                         break;
2720         }
2721         if (i == 4)
2722                 DRM_ERROR("FDI train 2 fail!\n");
2723
2724         DRM_DEBUG_KMS("FDI train done.\n");
2725 }
2726
2727 /* Manual link training for Ivy Bridge A0 parts */
2728 static void ivb_manual_fdi_link_train(struct drm_crtc *crtc)
2729 {
2730         struct drm_device *dev = crtc->dev;
2731         struct drm_i915_private *dev_priv = dev->dev_private;
2732         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2733         int pipe = intel_crtc->pipe;
2734         u32 reg, temp, i;
2735
2736         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2737            for train result */
2738         reg = FDI_RX_IMR(pipe);
2739         temp = I915_READ(reg);
2740         temp &= ~FDI_RX_SYMBOL_LOCK;
2741         temp &= ~FDI_RX_BIT_LOCK;
2742         I915_WRITE(reg, temp);
2743
2744         POSTING_READ(reg);
2745         udelay(150);
2746
2747         DRM_DEBUG_KMS("FDI_RX_IIR before link train 0x%x\n",
2748                       I915_READ(FDI_RX_IIR(pipe)));
2749
2750         /* enable CPU FDI TX and PCH FDI RX */
2751         reg = FDI_TX_CTL(pipe);
2752         temp = I915_READ(reg);
2753         temp &= ~(7 << 19);
2754         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2755         temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
2756         temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
2757         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2758         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2759         temp |= FDI_COMPOSITE_SYNC;
2760         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2761
2762         I915_WRITE(FDI_RX_MISC(pipe),
2763                    FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
2764
2765         reg = FDI_RX_CTL(pipe);
2766         temp = I915_READ(reg);
2767         temp &= ~FDI_LINK_TRAIN_AUTO;
2768         temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2769         temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2770         temp |= FDI_COMPOSITE_SYNC;
2771         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2772
2773         POSTING_READ(reg);
2774         udelay(150);
2775
2776         for (i = 0; i < 4; i++) {
2777                 reg = FDI_TX_CTL(pipe);
2778                 temp = I915_READ(reg);
2779                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2780                 temp |= snb_b_fdi_train_param[i];
2781                 I915_WRITE(reg, temp);
2782
2783                 POSTING_READ(reg);
2784                 udelay(500);
2785
2786                 reg = FDI_RX_IIR(pipe);
2787                 temp = I915_READ(reg);
2788                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2789
2790                 if (temp & FDI_RX_BIT_LOCK ||
2791                     (I915_READ(reg) & FDI_RX_BIT_LOCK)) {
2792                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2793                         DRM_DEBUG_KMS("FDI train 1 done, level %i.\n", i);
2794                         break;
2795                 }
2796         }
2797         if (i == 4)
2798                 DRM_ERROR("FDI train 1 fail!\n");
2799
2800         /* Train 2 */
2801         reg = FDI_TX_CTL(pipe);
2802         temp = I915_READ(reg);
2803         temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2804         temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
2805         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2806         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2807         I915_WRITE(reg, temp);
2808
2809         reg = FDI_RX_CTL(pipe);
2810         temp = I915_READ(reg);
2811         temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2812         temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2813         I915_WRITE(reg, temp);
2814
2815         POSTING_READ(reg);
2816         udelay(150);
2817
2818         for (i = 0; i < 4; i++) {
2819                 reg = FDI_TX_CTL(pipe);
2820                 temp = I915_READ(reg);
2821                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2822                 temp |= snb_b_fdi_train_param[i];
2823                 I915_WRITE(reg, temp);
2824
2825                 POSTING_READ(reg);
2826                 udelay(500);
2827
2828                 reg = FDI_RX_IIR(pipe);
2829                 temp = I915_READ(reg);
2830                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2831
2832                 if (temp & FDI_RX_SYMBOL_LOCK) {
2833                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2834                         DRM_DEBUG_KMS("FDI train 2 done, level %i.\n", i);
2835                         break;
2836                 }
2837         }
2838         if (i == 4)
2839                 DRM_ERROR("FDI train 2 fail!\n");
2840
2841         DRM_DEBUG_KMS("FDI train done.\n");
2842 }
2843
2844 static void ironlake_fdi_pll_enable(struct intel_crtc *intel_crtc)
2845 {
2846         struct drm_device *dev = intel_crtc->base.dev;
2847         struct drm_i915_private *dev_priv = dev->dev_private;
2848         int pipe = intel_crtc->pipe;
2849         u32 reg, temp;
2850
2851
2852         /* enable PCH FDI RX PLL, wait warmup plus DMI latency */
2853         reg = FDI_RX_CTL(pipe);
2854         temp = I915_READ(reg);
2855         temp &= ~((0x7 << 19) | (0x7 << 16));
2856         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2857         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2858         I915_WRITE(reg, temp | FDI_RX_PLL_ENABLE);
2859
2860         POSTING_READ(reg);
2861         udelay(200);
2862
2863         /* Switch from Rawclk to PCDclk */
2864         temp = I915_READ(reg);
2865         I915_WRITE(reg, temp | FDI_PCDCLK);
2866
2867         POSTING_READ(reg);
2868         udelay(200);
2869
2870         /* Enable CPU FDI TX PLL, always on for Ironlake */
2871         reg = FDI_TX_CTL(pipe);
2872         temp = I915_READ(reg);
2873         if ((temp & FDI_TX_PLL_ENABLE) == 0) {
2874                 I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);
2875
2876                 POSTING_READ(reg);
2877                 udelay(100);
2878         }
2879 }
2880
2881 static void ironlake_fdi_pll_disable(struct intel_crtc *intel_crtc)
2882 {
2883         struct drm_device *dev = intel_crtc->base.dev;
2884         struct drm_i915_private *dev_priv = dev->dev_private;
2885         int pipe = intel_crtc->pipe;
2886         u32 reg, temp;
2887
2888         /* Switch from PCDclk to Rawclk */
2889         reg = FDI_RX_CTL(pipe);
2890         temp = I915_READ(reg);
2891         I915_WRITE(reg, temp & ~FDI_PCDCLK);
2892
2893         /* Disable CPU FDI TX PLL */
2894         reg = FDI_TX_CTL(pipe);
2895         temp = I915_READ(reg);
2896         I915_WRITE(reg, temp & ~FDI_TX_PLL_ENABLE);
2897
2898         POSTING_READ(reg);
2899         udelay(100);
2900
2901         reg = FDI_RX_CTL(pipe);
2902         temp = I915_READ(reg);
2903         I915_WRITE(reg, temp & ~FDI_RX_PLL_ENABLE);
2904
2905         /* Wait for the clocks to turn off. */
2906         POSTING_READ(reg);
2907         udelay(100);
2908 }
2909
2910 static void ironlake_fdi_disable(struct drm_crtc *crtc)
2911 {
2912         struct drm_device *dev = crtc->dev;
2913         struct drm_i915_private *dev_priv = dev->dev_private;
2914         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2915         int pipe = intel_crtc->pipe;
2916         u32 reg, temp;
2917
2918         /* disable CPU FDI tx and PCH FDI rx */
2919         reg = FDI_TX_CTL(pipe);
2920         temp = I915_READ(reg);
2921         I915_WRITE(reg, temp & ~FDI_TX_ENABLE);
2922         POSTING_READ(reg);
2923
2924         reg = FDI_RX_CTL(pipe);
2925         temp = I915_READ(reg);
2926         temp &= ~(0x7 << 16);
2927         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2928         I915_WRITE(reg, temp & ~FDI_RX_ENABLE);
2929
2930         POSTING_READ(reg);
2931         udelay(100);
2932
2933         /* Ironlake workaround, disable clock pointer after downing FDI */
2934         if (HAS_PCH_IBX(dev)) {
2935                 I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2936         }
2937
2938         /* still set train pattern 1 */
2939         reg = FDI_TX_CTL(pipe);
2940         temp = I915_READ(reg);
2941         temp &= ~FDI_LINK_TRAIN_NONE;
2942         temp |= FDI_LINK_TRAIN_PATTERN_1;
2943         I915_WRITE(reg, temp);
2944
2945         reg = FDI_RX_CTL(pipe);
2946         temp = I915_READ(reg);
2947         if (HAS_PCH_CPT(dev)) {
2948                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2949                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2950         } else {
2951                 temp &= ~FDI_LINK_TRAIN_NONE;
2952                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2953         }
2954         /* BPC in FDI rx is consistent with that in PIPECONF */
2955         temp &= ~(0x07 << 16);
2956         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2957         I915_WRITE(reg, temp);
2958
2959         POSTING_READ(reg);
2960         udelay(100);
2961 }
2962
2963 static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc)
2964 {
2965         struct drm_device *dev = crtc->dev;
2966         struct drm_i915_private *dev_priv = dev->dev_private;
2967         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2968         unsigned long flags;
2969         bool pending;
2970
2971         if (i915_reset_in_progress(&dev_priv->gpu_error) ||
2972             intel_crtc->reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter))
2973                 return false;
2974
2975         spin_lock_irqsave(&dev->event_lock, flags);
2976         pending = to_intel_crtc(crtc)->unpin_work != NULL;
2977         spin_unlock_irqrestore(&dev->event_lock, flags);
2978
2979         return pending;
2980 }
2981
2982 static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
2983 {
2984         struct drm_device *dev = crtc->dev;
2985         struct drm_i915_private *dev_priv = dev->dev_private;
2986
2987         if (crtc->fb == NULL)
2988                 return;
2989
2990         WARN_ON(waitqueue_active(&dev_priv->pending_flip_queue));
2991
2992         wait_event(dev_priv->pending_flip_queue,
2993                    !intel_crtc_has_pending_flip(crtc));
2994
2995         mutex_lock(&dev->struct_mutex);
2996         intel_finish_fb(crtc->fb);
2997         mutex_unlock(&dev->struct_mutex);
2998 }
2999
3000 /* Program iCLKIP clock to the desired frequency */
3001 static void lpt_program_iclkip(struct drm_crtc *crtc)
3002 {
3003         struct drm_device *dev = crtc->dev;
3004         struct drm_i915_private *dev_priv = dev->dev_private;
3005         u32 divsel, phaseinc, auxdiv, phasedir = 0;
3006         u32 temp;
3007
3008         mutex_lock(&dev_priv->dpio_lock);
3009
3010         /* It is necessary to ungate the pixclk gate prior to programming
3011          * the divisors, and gate it back when it is done.
3012          */
3013         I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_GATE);
3014
3015         /* Disable SSCCTL */
3016         intel_sbi_write(dev_priv, SBI_SSCCTL6,
3017                         intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK) |
3018                                 SBI_SSCCTL_DISABLE,
3019                         SBI_ICLK);
3020
3021         /* 20MHz is a corner case which is out of range for the 7-bit divisor */
3022         if (crtc->mode.clock == 20000) {
3023                 auxdiv = 1;
3024                 divsel = 0x41;
3025                 phaseinc = 0x20;
3026         } else {
3027                 /* The iCLK virtual clock root frequency is in MHz,
3028                  * but the crtc->mode.clock in in KHz. To get the divisors,
3029                  * it is necessary to divide one by another, so we
3030                  * convert the virtual clock precision to KHz here for higher
3031                  * precision.
3032                  */
3033                 u32 iclk_virtual_root_freq = 172800 * 1000;
3034                 u32 iclk_pi_range = 64;
3035                 u32 desired_divisor, msb_divisor_value, pi_value;
3036
3037                 desired_divisor = (iclk_virtual_root_freq / crtc->mode.clock);
3038                 msb_divisor_value = desired_divisor / iclk_pi_range;
3039                 pi_value = desired_divisor % iclk_pi_range;
3040
3041                 auxdiv = 0;
3042                 divsel = msb_divisor_value - 2;
3043                 phaseinc = pi_value;
3044         }
3045
3046         /* This should not happen with any sane values */
3047         WARN_ON(SBI_SSCDIVINTPHASE_DIVSEL(divsel) &
3048                 ~SBI_SSCDIVINTPHASE_DIVSEL_MASK);
3049         WARN_ON(SBI_SSCDIVINTPHASE_DIR(phasedir) &
3050                 ~SBI_SSCDIVINTPHASE_INCVAL_MASK);
3051
3052         DRM_DEBUG_KMS("iCLKIP clock: found settings for %dKHz refresh rate: auxdiv=%x, divsel=%x, phasedir=%x, phaseinc=%x\n",
3053                         crtc->mode.clock,
3054                         auxdiv,
3055                         divsel,
3056                         phasedir,
3057                         phaseinc);
3058
3059         /* Program SSCDIVINTPHASE6 */
3060         temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6, SBI_ICLK);
3061         temp &= ~SBI_SSCDIVINTPHASE_DIVSEL_MASK;
3062         temp |= SBI_SSCDIVINTPHASE_DIVSEL(divsel);
3063         temp &= ~SBI_SSCDIVINTPHASE_INCVAL_MASK;
3064         temp |= SBI_SSCDIVINTPHASE_INCVAL(phaseinc);
3065         temp |= SBI_SSCDIVINTPHASE_DIR(phasedir);
3066         temp |= SBI_SSCDIVINTPHASE_PROPAGATE;
3067         intel_sbi_write(dev_priv, SBI_SSCDIVINTPHASE6, temp, SBI_ICLK);
3068
3069         /* Program SSCAUXDIV */
3070         temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6, SBI_ICLK);
3071         temp &= ~SBI_SSCAUXDIV_FINALDIV2SEL(1);
3072         temp |= SBI_SSCAUXDIV_FINALDIV2SEL(auxdiv);
3073         intel_sbi_write(dev_priv, SBI_SSCAUXDIV6, temp, SBI_ICLK);
3074
3075         /* Enable modulator and associated divider */
3076         temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
3077         temp &= ~SBI_SSCCTL_DISABLE;
3078         intel_sbi_write(dev_priv, SBI_SSCCTL6, temp, SBI_ICLK);
3079
3080         /* Wait for initialization time */
3081         udelay(24);
3082
3083         I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_UNGATE);
3084
3085         mutex_unlock(&dev_priv->dpio_lock);
3086 }
3087
3088 /*
3089  * Enable PCH resources required for PCH ports:
3090  *   - PCH PLLs
3091  *   - FDI training & RX/TX
3092  *   - update transcoder timings
3093  *   - DP transcoding bits
3094  *   - transcoder
3095  */
3096 static void ironlake_pch_enable(struct drm_crtc *crtc)
3097 {
3098         struct drm_device *dev = crtc->dev;
3099         struct drm_i915_private *dev_priv = dev->dev_private;
3100         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3101         int pipe = intel_crtc->pipe;
3102         u32 reg, temp;
3103
3104         assert_transcoder_disabled(dev_priv, pipe);
3105
3106         /* Write the TU size bits before fdi link training, so that error
3107          * detection works. */
3108         I915_WRITE(FDI_RX_TUSIZE1(pipe),
3109                    I915_READ(PIPE_DATA_M1(pipe)) & TU_SIZE_MASK);
3110
3111         /* For PCH output, training FDI link */
3112         dev_priv->display.fdi_link_train(crtc);
3113
3114         /* XXX: pch pll's can be enabled any time before we enable the PCH
3115          * transcoder, and we actually should do this to not upset any PCH
3116          * transcoder that already use the clock when we share it.
3117          *
3118          * Note that enable_pch_pll tries to do the right thing, but get_pch_pll
3119          * unconditionally resets the pll - we need that to have the right LVDS
3120          * enable sequence. */
3121         ironlake_enable_pch_pll(intel_crtc);
3122
3123         if (HAS_PCH_CPT(dev)) {
3124                 u32 sel;
3125
3126                 temp = I915_READ(PCH_DPLL_SEL);
3127                 switch (pipe) {
3128                 default:
3129                 case 0:
3130                         temp |= TRANSA_DPLL_ENABLE;
3131                         sel = TRANSA_DPLLB_SEL;
3132                         break;
3133                 case 1:
3134                         temp |= TRANSB_DPLL_ENABLE;
3135                         sel = TRANSB_DPLLB_SEL;
3136                         break;
3137                 case 2:
3138                         temp |= TRANSC_DPLL_ENABLE;
3139                         sel = TRANSC_DPLLB_SEL;
3140                         break;
3141                 }
3142                 if (intel_crtc->pch_pll->pll_reg == _PCH_DPLL_B)
3143                         temp |= sel;
3144                 else
3145                         temp &= ~sel;
3146                 I915_WRITE(PCH_DPLL_SEL, temp);
3147         }
3148
3149         /* set transcoder timing, panel must allow it */
3150         assert_panel_unlocked(dev_priv, pipe);
3151         I915_WRITE(TRANS_HTOTAL(pipe), I915_READ(HTOTAL(pipe)));
3152         I915_WRITE(TRANS_HBLANK(pipe), I915_READ(HBLANK(pipe)));
3153         I915_WRITE(TRANS_HSYNC(pipe),  I915_READ(HSYNC(pipe)));
3154
3155         I915_WRITE(TRANS_VTOTAL(pipe), I915_READ(VTOTAL(pipe)));
3156         I915_WRITE(TRANS_VBLANK(pipe), I915_READ(VBLANK(pipe)));
3157         I915_WRITE(TRANS_VSYNC(pipe),  I915_READ(VSYNC(pipe)));
3158         I915_WRITE(TRANS_VSYNCSHIFT(pipe),  I915_READ(VSYNCSHIFT(pipe)));
3159
3160         intel_fdi_normal_train(crtc);
3161
3162         /* For PCH DP, enable TRANS_DP_CTL */
3163         if (HAS_PCH_CPT(dev) &&
3164             (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
3165              intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
3166                 u32 bpc = (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) >> 5;
3167                 reg = TRANS_DP_CTL(pipe);
3168                 temp = I915_READ(reg);
3169                 temp &= ~(TRANS_DP_PORT_SEL_MASK |
3170                           TRANS_DP_SYNC_MASK |
3171                           TRANS_DP_BPC_MASK);
3172                 temp |= (TRANS_DP_OUTPUT_ENABLE |
3173                          TRANS_DP_ENH_FRAMING);
3174                 temp |= bpc << 9; /* same format but at 11:9 */
3175
3176                 if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
3177                         temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
3178                 if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
3179                         temp |= TRANS_DP_VSYNC_ACTIVE_HIGH;
3180
3181                 switch (intel_trans_dp_port_sel(crtc)) {
3182                 case PCH_DP_B:
3183                         temp |= TRANS_DP_PORT_SEL_B;
3184                         break;
3185                 case PCH_DP_C:
3186                         temp |= TRANS_DP_PORT_SEL_C;
3187                         break;
3188                 case PCH_DP_D:
3189                         temp |= TRANS_DP_PORT_SEL_D;
3190                         break;
3191                 default:
3192                         BUG();
3193                 }
3194
3195                 I915_WRITE(reg, temp);
3196         }
3197
3198         ironlake_enable_pch_transcoder(dev_priv, pipe);
3199 }
3200
3201 static void lpt_pch_enable(struct drm_crtc *crtc)
3202 {
3203         struct drm_device *dev = crtc->dev;
3204         struct drm_i915_private *dev_priv = dev->dev_private;
3205         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3206         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
3207
3208         assert_transcoder_disabled(dev_priv, TRANSCODER_A);
3209
3210         lpt_program_iclkip(crtc);
3211
3212         /* Set transcoder timing. */
3213         I915_WRITE(_TRANS_HTOTAL_A, I915_READ(HTOTAL(cpu_transcoder)));
3214         I915_WRITE(_TRANS_HBLANK_A, I915_READ(HBLANK(cpu_transcoder)));
3215         I915_WRITE(_TRANS_HSYNC_A,  I915_READ(HSYNC(cpu_transcoder)));
3216
3217         I915_WRITE(_TRANS_VTOTAL_A, I915_READ(VTOTAL(cpu_transcoder)));
3218         I915_WRITE(_TRANS_VBLANK_A, I915_READ(VBLANK(cpu_transcoder)));
3219         I915_WRITE(_TRANS_VSYNC_A,  I915_READ(VSYNC(cpu_transcoder)));
3220         I915_WRITE(_TRANS_VSYNCSHIFT_A, I915_READ(VSYNCSHIFT(cpu_transcoder)));
3221
3222         lpt_enable_pch_transcoder(dev_priv, cpu_transcoder);
3223 }
3224
3225 static void intel_put_pch_pll(struct intel_crtc *intel_crtc)
3226 {
3227         struct intel_pch_pll *pll = intel_crtc->pch_pll;
3228
3229         if (pll == NULL)
3230                 return;
3231
3232         if (pll->refcount == 0) {
3233                 WARN(1, "bad PCH PLL refcount\n");
3234                 return;
3235         }
3236
3237         --pll->refcount;
3238         intel_crtc->pch_pll = NULL;
3239 }
3240
3241 static struct intel_pch_pll *intel_get_pch_pll(struct intel_crtc *intel_crtc, u32 dpll, u32 fp)
3242 {
3243         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
3244         struct intel_pch_pll *pll;
3245         int i;
3246
3247         pll = intel_crtc->pch_pll;
3248         if (pll) {
3249                 DRM_DEBUG_KMS("CRTC:%d reusing existing PCH PLL %x\n",
3250                               intel_crtc->base.base.id, pll->pll_reg);
3251                 goto prepare;
3252         }
3253
3254         if (HAS_PCH_IBX(dev_priv->dev)) {
3255                 /* Ironlake PCH has a fixed PLL->PCH pipe mapping. */
3256                 i = intel_crtc->pipe;
3257                 pll = &dev_priv->pch_plls[i];
3258
3259                 DRM_DEBUG_KMS("CRTC:%d using pre-allocated PCH PLL %x\n",
3260                               intel_crtc->base.base.id, pll->pll_reg);
3261
3262                 goto found;
3263         }
3264
3265         for (i = 0; i < dev_priv->num_pch_pll; i++) {
3266                 pll = &dev_priv->pch_plls[i];
3267
3268                 /* Only want to check enabled timings first */
3269                 if (pll->refcount == 0)
3270                         continue;
3271
3272                 if (dpll == (I915_READ(pll->pll_reg) & 0x7fffffff) &&
3273                     fp == I915_READ(pll->fp0_reg)) {
3274                         DRM_DEBUG_KMS("CRTC:%d sharing existing PCH PLL %x (refcount %d, ative %d)\n",
3275                                       intel_crtc->base.base.id,
3276                                       pll->pll_reg, pll->refcount, pll->active);
3277
3278                         goto found;
3279                 }
3280         }
3281
3282         /* Ok no matching timings, maybe there's a free one? */
3283         for (i = 0; i < dev_priv->num_pch_pll; i++) {
3284                 pll = &dev_priv->pch_plls[i];
3285                 if (pll->refcount == 0) {
3286                         DRM_DEBUG_KMS("CRTC:%d allocated PCH PLL %x\n",
3287                                       intel_crtc->base.base.id, pll->pll_reg);
3288                         goto found;
3289                 }
3290         }
3291
3292         return NULL;
3293
3294 found:
3295         intel_crtc->pch_pll = pll;
3296         pll->refcount++;
3297         DRM_DEBUG_DRIVER("using pll %d for pipe %d\n", i, intel_crtc->pipe);
3298 prepare: /* separate function? */
3299         DRM_DEBUG_DRIVER("switching PLL %x off\n", pll->pll_reg);
3300
3301         /* Wait for the clocks to stabilize before rewriting the regs */
3302         I915_WRITE(pll->pll_reg, dpll & ~DPLL_VCO_ENABLE);
3303         POSTING_READ(pll->pll_reg);
3304         udelay(150);
3305
3306         I915_WRITE(pll->fp0_reg, fp);
3307         I915_WRITE(pll->pll_reg, dpll & ~DPLL_VCO_ENABLE);
3308         pll->on = false;
3309         return pll;
3310 }
3311
3312 void intel_cpt_verify_modeset(struct drm_device *dev, int pipe)
3313 {
3314         struct drm_i915_private *dev_priv = dev->dev_private;
3315         int dslreg = PIPEDSL(pipe);
3316         u32 temp;
3317
3318         temp = I915_READ(dslreg);
3319         udelay(500);
3320         if (wait_for(I915_READ(dslreg) != temp, 5)) {
3321                 if (wait_for(I915_READ(dslreg) != temp, 5))
3322                         DRM_ERROR("mode set failed: pipe %d stuck\n", pipe);
3323         }
3324 }
3325
3326 static void ironlake_crtc_enable(struct drm_crtc *crtc)
3327 {
3328         struct drm_device *dev = crtc->dev;
3329         struct drm_i915_private *dev_priv = dev->dev_private;
3330         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3331         struct intel_encoder *encoder;
3332         int pipe = intel_crtc->pipe;
3333         int plane = intel_crtc->plane;
3334         u32 temp;
3335
3336         WARN_ON(!crtc->enabled);
3337
3338         if (intel_crtc->active)
3339                 return;
3340
3341         intel_crtc->active = true;
3342         intel_update_watermarks(dev);
3343
3344         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
3345                 temp = I915_READ(PCH_LVDS);
3346                 if ((temp & LVDS_PORT_EN) == 0)
3347                         I915_WRITE(PCH_LVDS, temp | LVDS_PORT_EN);
3348         }
3349
3350
3351         if (intel_crtc->config.has_pch_encoder) {
3352                 /* Note: FDI PLL enabling _must_ be done before we enable the
3353                  * cpu pipes, hence this is separate from all the other fdi/pch
3354                  * enabling. */
3355                 ironlake_fdi_pll_enable(intel_crtc);
3356         } else {
3357                 assert_fdi_tx_disabled(dev_priv, pipe);
3358                 assert_fdi_rx_disabled(dev_priv, pipe);
3359         }
3360
3361         for_each_encoder_on_crtc(dev, crtc, encoder)
3362                 if (encoder->pre_enable)
3363                         encoder->pre_enable(encoder);
3364
3365         /* Enable panel fitting for LVDS */
3366         if (dev_priv->pch_pf_size &&
3367             (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) ||
3368              intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
3369                 /* Force use of hard-coded filter coefficients
3370                  * as some pre-programmed values are broken,
3371                  * e.g. x201.
3372                  */
3373                 if (IS_IVYBRIDGE(dev))
3374                         I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3 |
3375                                                  PF_PIPE_SEL_IVB(pipe));
3376                 else
3377                         I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3);
3378                 I915_WRITE(PF_WIN_POS(pipe), dev_priv->pch_pf_pos);
3379                 I915_WRITE(PF_WIN_SZ(pipe), dev_priv->pch_pf_size);
3380         }
3381
3382         /*
3383          * On ILK+ LUT must be loaded before the pipe is running but with
3384          * clocks enabled
3385          */
3386         intel_crtc_load_lut(crtc);
3387
3388         intel_enable_pipe(dev_priv, pipe,
3389                           intel_crtc->config.has_pch_encoder);
3390         intel_enable_plane(dev_priv, plane, pipe);
3391
3392         if (intel_crtc->config.has_pch_encoder)
3393                 ironlake_pch_enable(crtc);
3394
3395         mutex_lock(&dev->struct_mutex);
3396         intel_update_fbc(dev);
3397         mutex_unlock(&dev->struct_mutex);
3398
3399         intel_crtc_update_cursor(crtc, true);
3400
3401         for_each_encoder_on_crtc(dev, crtc, encoder)
3402                 encoder->enable(encoder);
3403
3404         if (HAS_PCH_CPT(dev))
3405                 intel_cpt_verify_modeset(dev, intel_crtc->pipe);
3406
3407         /*
3408          * There seems to be a race in PCH platform hw (at least on some
3409          * outputs) where an enabled pipe still completes any pageflip right
3410          * away (as if the pipe is off) instead of waiting for vblank. As soon
3411          * as the first vblank happend, everything works as expected. Hence just
3412          * wait for one vblank before returning to avoid strange things
3413          * happening.
3414          */
3415         intel_wait_for_vblank(dev, intel_crtc->pipe);
3416 }
3417
3418 static void haswell_crtc_enable(struct drm_crtc *crtc)
3419 {
3420         struct drm_device *dev = crtc->dev;
3421         struct drm_i915_private *dev_priv = dev->dev_private;
3422         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3423         struct intel_encoder *encoder;
3424         int pipe = intel_crtc->pipe;
3425         int plane = intel_crtc->plane;
3426
3427         WARN_ON(!crtc->enabled);
3428
3429         if (intel_crtc->active)
3430                 return;
3431
3432         intel_crtc->active = true;
3433         intel_update_watermarks(dev);
3434
3435         if (intel_crtc->config.has_pch_encoder)
3436                 dev_priv->display.fdi_link_train(crtc);
3437
3438         for_each_encoder_on_crtc(dev, crtc, encoder)
3439                 if (encoder->pre_enable)
3440                         encoder->pre_enable(encoder);
3441
3442         intel_ddi_enable_pipe_clock(intel_crtc);
3443
3444         /* Enable panel fitting for eDP */
3445         if (dev_priv->pch_pf_size &&
3446             intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
3447                 /* Force use of hard-coded filter coefficients
3448                  * as some pre-programmed values are broken,
3449                  * e.g. x201.
3450                  */
3451                 I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3 |
3452                                          PF_PIPE_SEL_IVB(pipe));
3453                 I915_WRITE(PF_WIN_POS(pipe), dev_priv->pch_pf_pos);
3454                 I915_WRITE(PF_WIN_SZ(pipe), dev_priv->pch_pf_size);
3455         }
3456
3457         /*
3458          * On ILK+ LUT must be loaded before the pipe is running but with
3459          * clocks enabled
3460          */
3461         intel_crtc_load_lut(crtc);
3462
3463         intel_ddi_set_pipe_settings(crtc);
3464         intel_ddi_enable_transcoder_func(crtc);
3465
3466         intel_enable_pipe(dev_priv, pipe,
3467                           intel_crtc->config.has_pch_encoder);
3468         intel_enable_plane(dev_priv, plane, pipe);
3469
3470         if (intel_crtc->config.has_pch_encoder)
3471                 lpt_pch_enable(crtc);
3472
3473         mutex_lock(&dev->struct_mutex);
3474         intel_update_fbc(dev);
3475         mutex_unlock(&dev->struct_mutex);
3476
3477         intel_crtc_update_cursor(crtc, true);
3478
3479         for_each_encoder_on_crtc(dev, crtc, encoder)
3480                 encoder->enable(encoder);
3481
3482         /*
3483          * There seems to be a race in PCH platform hw (at least on some
3484          * outputs) where an enabled pipe still completes any pageflip right
3485          * away (as if the pipe is off) instead of waiting for vblank. As soon
3486          * as the first vblank happend, everything works as expected. Hence just
3487          * wait for one vblank before returning to avoid strange things
3488          * happening.
3489          */
3490         intel_wait_for_vblank(dev, intel_crtc->pipe);
3491 }
3492
3493 static void ironlake_crtc_disable(struct drm_crtc *crtc)
3494 {
3495         struct drm_device *dev = crtc->dev;
3496         struct drm_i915_private *dev_priv = dev->dev_private;
3497         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3498         struct intel_encoder *encoder;
3499         int pipe = intel_crtc->pipe;
3500         int plane = intel_crtc->plane;
3501         u32 reg, temp;
3502
3503
3504         if (!intel_crtc->active)
3505                 return;
3506
3507         for_each_encoder_on_crtc(dev, crtc, encoder)
3508                 encoder->disable(encoder);
3509
3510         intel_crtc_wait_for_pending_flips(crtc);
3511         drm_vblank_off(dev, pipe);
3512         intel_crtc_update_cursor(crtc, false);
3513
3514         intel_disable_plane(dev_priv, plane, pipe);
3515
3516         if (dev_priv->cfb_plane == plane)
3517                 intel_disable_fbc(dev);
3518
3519         intel_disable_pipe(dev_priv, pipe);
3520
3521         /* Disable PF */
3522         I915_WRITE(PF_CTL(pipe), 0);
3523         I915_WRITE(PF_WIN_SZ(pipe), 0);
3524
3525         for_each_encoder_on_crtc(dev, crtc, encoder)
3526                 if (encoder->post_disable)
3527                         encoder->post_disable(encoder);
3528
3529         ironlake_fdi_disable(crtc);
3530
3531         ironlake_disable_pch_transcoder(dev_priv, pipe);
3532
3533         if (HAS_PCH_CPT(dev)) {
3534                 /* disable TRANS_DP_CTL */
3535                 reg = TRANS_DP_CTL(pipe);
3536                 temp = I915_READ(reg);
3537                 temp &= ~(TRANS_DP_OUTPUT_ENABLE | TRANS_DP_PORT_SEL_MASK);
3538                 temp |= TRANS_DP_PORT_SEL_NONE;
3539                 I915_WRITE(reg, temp);
3540
3541                 /* disable DPLL_SEL */
3542                 temp = I915_READ(PCH_DPLL_SEL);
3543                 switch (pipe) {
3544                 case 0:
3545                         temp &= ~(TRANSA_DPLL_ENABLE | TRANSA_DPLLB_SEL);
3546                         break;
3547                 case 1:
3548                         temp &= ~(TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
3549                         break;
3550                 case 2:
3551                         /* C shares PLL A or B */
3552                         temp &= ~(TRANSC_DPLL_ENABLE | TRANSC_DPLLB_SEL);
3553                         break;
3554                 default:
3555                         BUG(); /* wtf */
3556                 }
3557                 I915_WRITE(PCH_DPLL_SEL, temp);
3558         }
3559
3560         /* disable PCH DPLL */
3561         intel_disable_pch_pll(intel_crtc);
3562
3563         ironlake_fdi_pll_disable(intel_crtc);
3564
3565         intel_crtc->active = false;
3566         intel_update_watermarks(dev);
3567
3568         mutex_lock(&dev->struct_mutex);
3569         intel_update_fbc(dev);
3570         mutex_unlock(&dev->struct_mutex);
3571 }
3572
3573 static void haswell_crtc_disable(struct drm_crtc *crtc)
3574 {
3575         struct drm_device *dev = crtc->dev;
3576         struct drm_i915_private *dev_priv = dev->dev_private;
3577         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3578         struct intel_encoder *encoder;
3579         int pipe = intel_crtc->pipe;
3580         int plane = intel_crtc->plane;
3581         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
3582
3583         if (!intel_crtc->active)
3584                 return;
3585
3586         for_each_encoder_on_crtc(dev, crtc, encoder)
3587                 encoder->disable(encoder);
3588
3589         intel_crtc_wait_for_pending_flips(crtc);
3590         drm_vblank_off(dev, pipe);
3591         intel_crtc_update_cursor(crtc, false);
3592
3593         intel_disable_plane(dev_priv, plane, pipe);
3594
3595         if (dev_priv->cfb_plane == plane)
3596                 intel_disable_fbc(dev);
3597
3598         intel_disable_pipe(dev_priv, pipe);
3599
3600         intel_ddi_disable_transcoder_func(dev_priv, cpu_transcoder);
3601
3602         /* Disable PF */
3603         I915_WRITE(PF_CTL(pipe), 0);
3604         I915_WRITE(PF_WIN_SZ(pipe), 0);
3605
3606         intel_ddi_disable_pipe_clock(intel_crtc);
3607
3608         for_each_encoder_on_crtc(dev, crtc, encoder)
3609                 if (encoder->post_disable)
3610                         encoder->post_disable(encoder);
3611
3612         if (intel_crtc->config.has_pch_encoder) {
3613                 lpt_disable_pch_transcoder(dev_priv);
3614                 intel_ddi_fdi_disable(crtc);
3615         }
3616
3617         intel_crtc->active = false;
3618         intel_update_watermarks(dev);
3619
3620         mutex_lock(&dev->struct_mutex);
3621         intel_update_fbc(dev);
3622         mutex_unlock(&dev->struct_mutex);
3623 }
3624
3625 static void ironlake_crtc_off(struct drm_crtc *crtc)
3626 {
3627         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3628         intel_put_pch_pll(intel_crtc);
3629 }
3630
3631 static void haswell_crtc_off(struct drm_crtc *crtc)
3632 {
3633         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3634
3635         /* Stop saying we're using TRANSCODER_EDP because some other CRTC might
3636          * start using it. */
3637         intel_crtc->cpu_transcoder = (enum transcoder) intel_crtc->pipe;
3638
3639         intel_ddi_put_crtc_pll(crtc);
3640 }
3641
3642 static void intel_crtc_dpms_overlay(struct intel_crtc *intel_crtc, bool enable)
3643 {
3644         if (!enable && intel_crtc->overlay) {
3645                 struct drm_device *dev = intel_crtc->base.dev;
3646                 struct drm_i915_private *dev_priv = dev->dev_private;
3647
3648                 mutex_lock(&dev->struct_mutex);
3649                 dev_priv->mm.interruptible = false;
3650                 (void) intel_overlay_switch_off(intel_crtc->overlay);
3651                 dev_priv->mm.interruptible = true;
3652                 mutex_unlock(&dev->struct_mutex);
3653         }
3654
3655         /* Let userspace switch the overlay on again. In most cases userspace
3656          * has to recompute where to put it anyway.
3657          */
3658 }
3659
3660 /**
3661  * i9xx_fixup_plane - ugly workaround for G45 to fire up the hardware
3662  * cursor plane briefly if not already running after enabling the display
3663  * plane.
3664  * This workaround avoids occasional blank screens when self refresh is
3665  * enabled.
3666  */
3667 static void
3668 g4x_fixup_plane(struct drm_i915_private *dev_priv, enum pipe pipe)
3669 {
3670         u32 cntl = I915_READ(CURCNTR(pipe));
3671
3672         if ((cntl & CURSOR_MODE) == 0) {
3673                 u32 fw_bcl_self = I915_READ(FW_BLC_SELF);
3674
3675                 I915_WRITE(FW_BLC_SELF, fw_bcl_self & ~FW_BLC_SELF_EN);
3676                 I915_WRITE(CURCNTR(pipe), CURSOR_MODE_64_ARGB_AX);
3677                 intel_wait_for_vblank(dev_priv->dev, pipe);
3678                 I915_WRITE(CURCNTR(pipe), cntl);
3679                 I915_WRITE(CURBASE(pipe), I915_READ(CURBASE(pipe)));
3680                 I915_WRITE(FW_BLC_SELF, fw_bcl_self);
3681         }
3682 }
3683
3684 static void i9xx_crtc_enable(struct drm_crtc *crtc)
3685 {
3686         struct drm_device *dev = crtc->dev;
3687         struct drm_i915_private *dev_priv = dev->dev_private;
3688         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3689         struct intel_encoder *encoder;
3690         int pipe = intel_crtc->pipe;
3691         int plane = intel_crtc->plane;
3692
3693         WARN_ON(!crtc->enabled);
3694
3695         if (intel_crtc->active)
3696                 return;
3697
3698         intel_crtc->active = true;
3699         intel_update_watermarks(dev);
3700
3701         intel_enable_pll(dev_priv, pipe);
3702
3703         for_each_encoder_on_crtc(dev, crtc, encoder)
3704                 if (encoder->pre_enable)
3705                         encoder->pre_enable(encoder);
3706
3707         intel_enable_pipe(dev_priv, pipe, false);
3708         intel_enable_plane(dev_priv, plane, pipe);
3709         if (IS_G4X(dev))
3710                 g4x_fixup_plane(dev_priv, pipe);
3711
3712         intel_crtc_load_lut(crtc);
3713         intel_update_fbc(dev);
3714
3715         /* Give the overlay scaler a chance to enable if it's on this pipe */
3716         intel_crtc_dpms_overlay(intel_crtc, true);
3717         intel_crtc_update_cursor(crtc, true);
3718
3719         for_each_encoder_on_crtc(dev, crtc, encoder)
3720                 encoder->enable(encoder);
3721 }
3722
3723 static void i9xx_crtc_disable(struct drm_crtc *crtc)
3724 {
3725         struct drm_device *dev = crtc->dev;
3726         struct drm_i915_private *dev_priv = dev->dev_private;
3727         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3728         struct intel_encoder *encoder;
3729         int pipe = intel_crtc->pipe;
3730         int plane = intel_crtc->plane;
3731         u32 pctl;
3732
3733
3734         if (!intel_crtc->active)
3735                 return;
3736
3737         for_each_encoder_on_crtc(dev, crtc, encoder)
3738                 encoder->disable(encoder);
3739
3740         /* Give the overlay scaler a chance to disable if it's on this pipe */
3741         intel_crtc_wait_for_pending_flips(crtc);
3742         drm_vblank_off(dev, pipe);
3743         intel_crtc_dpms_overlay(intel_crtc, false);
3744         intel_crtc_update_cursor(crtc, false);
3745
3746         if (dev_priv->cfb_plane == plane)
3747                 intel_disable_fbc(dev);
3748
3749         intel_disable_plane(dev_priv, plane, pipe);
3750         intel_disable_pipe(dev_priv, pipe);
3751
3752         /* Disable pannel fitter if it is on this pipe. */
3753         pctl = I915_READ(PFIT_CONTROL);
3754         if ((pctl & PFIT_ENABLE) &&
3755             ((pctl & PFIT_PIPE_MASK) >> PFIT_PIPE_SHIFT) == pipe)
3756                 I915_WRITE(PFIT_CONTROL, 0);
3757
3758         intel_disable_pll(dev_priv, pipe);
3759
3760         intel_crtc->active = false;
3761         intel_update_fbc(dev);
3762         intel_update_watermarks(dev);
3763 }
3764
3765 static void i9xx_crtc_off(struct drm_crtc *crtc)
3766 {
3767 }
3768
3769 static void intel_crtc_update_sarea(struct drm_crtc *crtc,
3770                                     bool enabled)
3771 {
3772         struct drm_device *dev = crtc->dev;
3773         struct drm_i915_master_private *master_priv;
3774         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3775         int pipe = intel_crtc->pipe;
3776
3777         if (!dev->primary->master)
3778                 return;
3779
3780         master_priv = dev->primary->master->driver_priv;
3781         if (!master_priv->sarea_priv)
3782                 return;
3783
3784         switch (pipe) {
3785         case 0:
3786                 master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
3787                 master_priv->sarea_priv->pipeA_h = enabled ? crtc->mode.vdisplay : 0;
3788                 break;
3789         case 1:
3790                 master_priv->sarea_priv->pipeB_w = enabled ? crtc->mode.hdisplay : 0;
3791                 master_priv->sarea_priv->pipeB_h = enabled ? crtc->mode.vdisplay : 0;
3792                 break;
3793         default:
3794                 DRM_ERROR("Can't update pipe %c in SAREA\n", pipe_name(pipe));
3795                 break;
3796         }
3797 }
3798
3799 /**
3800  * Sets the power management mode of the pipe and plane.
3801  */
3802 void intel_crtc_update_dpms(struct drm_crtc *crtc)
3803 {
3804         struct drm_device *dev = crtc->dev;
3805         struct drm_i915_private *dev_priv = dev->dev_private;
3806         struct intel_encoder *intel_encoder;
3807         bool enable = false;
3808
3809         for_each_encoder_on_crtc(dev, crtc, intel_encoder)
3810                 enable |= intel_encoder->connectors_active;
3811
3812         if (enable)
3813                 dev_priv->display.crtc_enable(crtc);
3814         else
3815                 dev_priv->display.crtc_disable(crtc);
3816
3817         intel_crtc_update_sarea(crtc, enable);
3818 }
3819
3820 static void intel_crtc_disable(struct drm_crtc *crtc)
3821 {
3822         struct drm_device *dev = crtc->dev;
3823         struct drm_connector *connector;
3824         struct drm_i915_private *dev_priv = dev->dev_private;
3825         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3826
3827         /* crtc should still be enabled when we disable it. */
3828         WARN_ON(!crtc->enabled);
3829
3830         intel_crtc->eld_vld = false;
3831         dev_priv->display.crtc_disable(crtc);
3832         intel_crtc_update_sarea(crtc, false);
3833         dev_priv->display.off(crtc);
3834
3835         assert_plane_disabled(dev->dev_private, to_intel_crtc(crtc)->plane);
3836         assert_pipe_disabled(dev->dev_private, to_intel_crtc(crtc)->pipe);
3837
3838         if (crtc->fb) {
3839                 mutex_lock(&dev->struct_mutex);
3840                 intel_unpin_fb_obj(to_intel_framebuffer(crtc->fb)->obj);
3841                 mutex_unlock(&dev->struct_mutex);
3842                 crtc->fb = NULL;
3843         }
3844
3845         /* Update computed state. */
3846         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
3847                 if (!connector->encoder || !connector->encoder->crtc)
3848                         continue;
3849
3850                 if (connector->encoder->crtc != crtc)
3851                         continue;
3852
3853                 connector->dpms = DRM_MODE_DPMS_OFF;
3854                 to_intel_encoder(connector->encoder)->connectors_active = false;
3855         }
3856 }
3857
3858 void intel_modeset_disable(struct drm_device *dev)
3859 {
3860         struct drm_crtc *crtc;
3861
3862         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
3863                 if (crtc->enabled)
3864                         intel_crtc_disable(crtc);
3865         }
3866 }
3867
3868 void intel_encoder_destroy(struct drm_encoder *encoder)
3869 {
3870         struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
3871
3872         drm_encoder_cleanup(encoder);
3873         kfree(intel_encoder);
3874 }
3875
3876 /* Simple dpms helper for encodres with just one connector, no cloning and only
3877  * one kind of off state. It clamps all !ON modes to fully OFF and changes the
3878  * state of the entire output pipe. */
3879 void intel_encoder_dpms(struct intel_encoder *encoder, int mode)
3880 {
3881         if (mode == DRM_MODE_DPMS_ON) {
3882                 encoder->connectors_active = true;
3883
3884                 intel_crtc_update_dpms(encoder->base.crtc);
3885         } else {
3886                 encoder->connectors_active = false;
3887
3888                 intel_crtc_update_dpms(encoder->base.crtc);
3889         }
3890 }
3891
3892 /* Cross check the actual hw state with our own modeset state tracking (and it's
3893  * internal consistency). */
3894 static void intel_connector_check_state(struct intel_connector *connector)
3895 {
3896         if (connector->get_hw_state(connector)) {
3897                 struct intel_encoder *encoder = connector->encoder;
3898                 struct drm_crtc *crtc;
3899                 bool encoder_enabled;
3900                 enum pipe pipe;
3901
3902                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
3903                               connector->base.base.id,
3904                               drm_get_connector_name(&connector->base));
3905
3906                 WARN(connector->base.dpms == DRM_MODE_DPMS_OFF,
3907                      "wrong connector dpms state\n");
3908                 WARN(connector->base.encoder != &encoder->base,
3909                      "active connector not linked to encoder\n");
3910                 WARN(!encoder->connectors_active,
3911                      "encoder->connectors_active not set\n");
3912
3913                 encoder_enabled = encoder->get_hw_state(encoder, &pipe);
3914                 WARN(!encoder_enabled, "encoder not enabled\n");
3915                 if (WARN_ON(!encoder->base.crtc))
3916                         return;
3917
3918                 crtc = encoder->base.crtc;
3919
3920                 WARN(!crtc->enabled, "crtc not enabled\n");
3921                 WARN(!to_intel_crtc(crtc)->active, "crtc not active\n");
3922                 WARN(pipe != to_intel_crtc(crtc)->pipe,
3923                      "encoder active on the wrong pipe\n");
3924         }
3925 }
3926
3927 /* Even simpler default implementation, if there's really no special case to
3928  * consider. */
3929 void intel_connector_dpms(struct drm_connector *connector, int mode)
3930 {
3931         struct intel_encoder *encoder = intel_attached_encoder(connector);
3932
3933         /* All the simple cases only support two dpms states. */
3934         if (mode != DRM_MODE_DPMS_ON)
3935                 mode = DRM_MODE_DPMS_OFF;
3936
3937         if (mode == connector->dpms)
3938                 return;
3939
3940         connector->dpms = mode;
3941
3942         /* Only need to change hw state when actually enabled */
3943         if (encoder->base.crtc)
3944                 intel_encoder_dpms(encoder, mode);
3945         else
3946                 WARN_ON(encoder->connectors_active != false);
3947
3948         intel_modeset_check_state(connector->dev);
3949 }
3950
3951 /* Simple connector->get_hw_state implementation for encoders that support only
3952  * one connector and no cloning and hence the encoder state determines the state
3953  * of the connector. */
3954 bool intel_connector_get_hw_state(struct intel_connector *connector)
3955 {
3956         enum pipe pipe = 0;
3957         struct intel_encoder *encoder = connector->encoder;
3958
3959         return encoder->get_hw_state(encoder, &pipe);
3960 }
3961
3962 static bool intel_crtc_compute_config(struct drm_crtc *crtc,
3963                                       struct intel_crtc_config *pipe_config)
3964 {
3965         struct drm_device *dev = crtc->dev;
3966         struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
3967
3968         if (HAS_PCH_SPLIT(dev)) {
3969                 /* FDI link clock is fixed at 2.7G */
3970                 if (pipe_config->requested_mode.clock * 3
3971                     > IRONLAKE_FDI_FREQ * 4)
3972                         return false;
3973         }
3974
3975         /* All interlaced capable intel hw wants timings in frames. Note though
3976          * that intel_lvds_mode_fixup does some funny tricks with the crtc
3977          * timings, so we need to be careful not to clobber these.*/
3978         if (!pipe_config->timings_set)
3979                 drm_mode_set_crtcinfo(adjusted_mode, 0);
3980
3981         /* WaPruneModeWithIncorrectHsyncOffset: Cantiga+ cannot handle modes
3982          * with a hsync front porch of 0.
3983          */
3984         if ((INTEL_INFO(dev)->gen > 4 || IS_G4X(dev)) &&
3985                 adjusted_mode->hsync_start == adjusted_mode->hdisplay)
3986                 return false;
3987
3988         if ((IS_G4X(dev) || IS_VALLEYVIEW(dev)) && pipe_config->pipe_bpp > 10) {
3989                 pipe_config->pipe_bpp = 10*3; /* 12bpc is gen5+ */
3990         } else if (INTEL_INFO(dev)->gen <= 4 && pipe_config->pipe_bpp > 8) {
3991                 /* only a 8bpc pipe, with 6bpc dither through the panel fitter
3992                  * for lvds. */
3993                 pipe_config->pipe_bpp = 8*3;
3994         }
3995
3996         return true;
3997 }
3998
3999 static int valleyview_get_display_clock_speed(struct drm_device *dev)
4000 {
4001         return 400000; /* FIXME */
4002 }
4003
4004 static int i945_get_display_clock_speed(struct drm_device *dev)
4005 {
4006         return 400000;
4007 }
4008
4009 static int i915_get_display_clock_speed(struct drm_device *dev)
4010 {
4011         return 333000;
4012 }
4013
4014 static int i9xx_misc_get_display_clock_speed(struct drm_device *dev)
4015 {
4016         return 200000;
4017 }
4018
4019 static int i915gm_get_display_clock_speed(struct drm_device *dev)
4020 {
4021         u16 gcfgc = 0;
4022
4023         pci_read_config_word(dev->pdev, GCFGC, &gcfgc);
4024
4025         if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
4026                 return 133000;
4027         else {
4028                 switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
4029                 case GC_DISPLAY_CLOCK_333_MHZ:
4030                         return 333000;
4031                 default:
4032                 case GC_DISPLAY_CLOCK_190_200_MHZ:
4033                         return 190000;
4034                 }
4035         }
4036 }
4037
4038 static int i865_get_display_clock_speed(struct drm_device *dev)
4039 {
4040         return 266000;
4041 }
4042
4043 static int i855_get_display_clock_speed(struct drm_device *dev)
4044 {
4045         u16 hpllcc = 0;
4046         /* Assume that the hardware is in the high speed state.  This
4047          * should be the default.
4048          */
4049         switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
4050         case GC_CLOCK_133_200:
4051         case GC_CLOCK_100_200:
4052                 return 200000;
4053         case GC_CLOCK_166_250:
4054                 return 250000;
4055         case GC_CLOCK_100_133:
4056                 return 133000;
4057         }
4058
4059         /* Shouldn't happen */
4060         return 0;
4061 }
4062
4063 static int i830_get_display_clock_speed(struct drm_device *dev)
4064 {
4065         return 133000;
4066 }
4067
4068 static void
4069 intel_reduce_ratio(uint32_t *num, uint32_t *den)
4070 {
4071         while (*num > 0xffffff || *den > 0xffffff) {
4072                 *num >>= 1;
4073                 *den >>= 1;
4074         }
4075 }
4076
4077 void
4078 intel_link_compute_m_n(int bits_per_pixel, int nlanes,
4079                        int pixel_clock, int link_clock,
4080                        struct intel_link_m_n *m_n)
4081 {
4082         m_n->tu = 64;
4083         m_n->gmch_m = bits_per_pixel * pixel_clock;
4084         m_n->gmch_n = link_clock * nlanes * 8;
4085         intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
4086         m_n->link_m = pixel_clock;
4087         m_n->link_n = link_clock;
4088         intel_reduce_ratio(&m_n->link_m, &m_n->link_n);
4089 }
4090
4091 static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
4092 {
4093         if (i915_panel_use_ssc >= 0)
4094                 return i915_panel_use_ssc != 0;
4095         return dev_priv->lvds_use_ssc
4096                 && !(dev_priv->quirks & QUIRK_LVDS_SSC_DISABLE);
4097 }
4098
4099 static int vlv_get_refclk(struct drm_crtc *crtc)
4100 {
4101         struct drm_device *dev = crtc->dev;
4102         struct drm_i915_private *dev_priv = dev->dev_private;
4103         int refclk = 27000; /* for DP & HDMI */
4104
4105         return 100000; /* only one validated so far */
4106
4107         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
4108                 refclk = 96000;
4109         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
4110                 if (intel_panel_use_ssc(dev_priv))
4111                         refclk = 100000;
4112                 else
4113                         refclk = 96000;
4114         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
4115                 refclk = 100000;
4116         }
4117
4118         return refclk;
4119 }
4120
4121 static int i9xx_get_refclk(struct drm_crtc *crtc, int num_connectors)
4122 {
4123         struct drm_device *dev = crtc->dev;
4124         struct drm_i915_private *dev_priv = dev->dev_private;
4125         int refclk;
4126
4127         if (IS_VALLEYVIEW(dev)) {
4128                 refclk = vlv_get_refclk(crtc);
4129         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
4130             intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
4131                 refclk = dev_priv->lvds_ssc_freq * 1000;
4132                 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
4133                               refclk / 1000);
4134         } else if (!IS_GEN2(dev)) {
4135                 refclk = 96000;
4136         } else {
4137                 refclk = 48000;
4138         }
4139
4140         return refclk;
4141 }
4142
4143 static void i9xx_adjust_sdvo_tv_clock(struct intel_crtc *crtc)
4144 {
4145         unsigned dotclock = crtc->config.adjusted_mode.clock;
4146         struct dpll *clock = &crtc->config.dpll;
4147
4148         /* SDVO TV has fixed PLL values depend on its clock range,
4149            this mirrors vbios setting. */
4150         if (dotclock >= 100000 && dotclock < 140500) {
4151                 clock->p1 = 2;
4152                 clock->p2 = 10;
4153                 clock->n = 3;
4154                 clock->m1 = 16;
4155                 clock->m2 = 8;
4156         } else if (dotclock >= 140500 && dotclock <= 200000) {
4157                 clock->p1 = 1;
4158                 clock->p2 = 10;
4159                 clock->n = 6;
4160                 clock->m1 = 12;
4161                 clock->m2 = 8;
4162         }
4163
4164         crtc->config.clock_set = true;
4165 }
4166
4167 static void i9xx_update_pll_dividers(struct intel_crtc *crtc,
4168                                      intel_clock_t *reduced_clock)
4169 {
4170         struct drm_device *dev = crtc->base.dev;
4171         struct drm_i915_private *dev_priv = dev->dev_private;
4172         int pipe = crtc->pipe;
4173         u32 fp, fp2 = 0;
4174         struct dpll *clock = &crtc->config.dpll;
4175
4176         if (IS_PINEVIEW(dev)) {
4177                 fp = (1 << clock->n) << 16 | clock->m1 << 8 | clock->m2;
4178                 if (reduced_clock)
4179                         fp2 = (1 << reduced_clock->n) << 16 |
4180                                 reduced_clock->m1 << 8 | reduced_clock->m2;
4181         } else {
4182                 fp = clock->n << 16 | clock->m1 << 8 | clock->m2;
4183                 if (reduced_clock)
4184                         fp2 = reduced_clock->n << 16 | reduced_clock->m1 << 8 |
4185                                 reduced_clock->m2;
4186         }
4187
4188         I915_WRITE(FP0(pipe), fp);
4189
4190         crtc->lowfreq_avail = false;
4191         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
4192             reduced_clock && i915_powersave) {
4193                 I915_WRITE(FP1(pipe), fp2);
4194                 crtc->lowfreq_avail = true;
4195         } else {
4196                 I915_WRITE(FP1(pipe), fp);
4197         }
4198 }
4199
4200 static void intel_dp_set_m_n(struct intel_crtc *crtc)
4201 {
4202         if (crtc->config.has_pch_encoder)
4203                 intel_pch_transcoder_set_m_n(crtc, &crtc->config.dp_m_n);
4204         else
4205                 intel_cpu_transcoder_set_m_n(crtc, &crtc->config.dp_m_n);
4206 }
4207
4208 static void vlv_update_pll(struct intel_crtc *crtc)
4209 {
4210         struct drm_device *dev = crtc->base.dev;
4211         struct drm_i915_private *dev_priv = dev->dev_private;
4212         int pipe = crtc->pipe;
4213         u32 dpll, mdiv, pdiv;
4214         u32 bestn, bestm1, bestm2, bestp1, bestp2;
4215         bool is_sdvo;
4216         u32 temp;
4217
4218         mutex_lock(&dev_priv->dpio_lock);
4219
4220         is_sdvo = intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_SDVO) ||
4221                 intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_HDMI);
4222
4223         dpll = DPLL_VGA_MODE_DIS;
4224         dpll |= DPLL_EXT_BUFFER_ENABLE_VLV;
4225         dpll |= DPLL_REFA_CLK_ENABLE_VLV;
4226         dpll |= DPLL_INTEGRATED_CLOCK_VLV;
4227
4228         I915_WRITE(DPLL(pipe), dpll);
4229         POSTING_READ(DPLL(pipe));
4230
4231         bestn = crtc->config.dpll.n;
4232         bestm1 = crtc->config.dpll.m1;
4233         bestm2 = crtc->config.dpll.m2;
4234         bestp1 = crtc->config.dpll.p1;
4235         bestp2 = crtc->config.dpll.p2;
4236
4237         /*
4238          * In Valleyview PLL and program lane counter registers are exposed
4239          * through DPIO interface
4240          */
4241         mdiv = ((bestm1 << DPIO_M1DIV_SHIFT) | (bestm2 & DPIO_M2DIV_MASK));
4242         mdiv |= ((bestp1 << DPIO_P1_SHIFT) | (bestp2 << DPIO_P2_SHIFT));
4243         mdiv |= ((bestn << DPIO_N_SHIFT));
4244         mdiv |= (1 << DPIO_POST_DIV_SHIFT);
4245         mdiv |= (1 << DPIO_K_SHIFT);
4246         mdiv |= DPIO_ENABLE_CALIBRATION;
4247         intel_dpio_write(dev_priv, DPIO_DIV(pipe), mdiv);
4248
4249         intel_dpio_write(dev_priv, DPIO_CORE_CLK(pipe), 0x01000000);
4250
4251         pdiv = (1 << DPIO_REFSEL_OVERRIDE) | (5 << DPIO_PLL_MODESEL_SHIFT) |
4252                 (3 << DPIO_BIAS_CURRENT_CTL_SHIFT) | (1<<20) |
4253                 (7 << DPIO_PLL_REFCLK_SEL_SHIFT) | (8 << DPIO_DRIVER_CTL_SHIFT) |
4254                 (5 << DPIO_CLK_BIAS_CTL_SHIFT);
4255         intel_dpio_write(dev_priv, DPIO_REFSFR(pipe), pdiv);
4256
4257         intel_dpio_write(dev_priv, DPIO_LFP_COEFF(pipe), 0x005f003b);
4258
4259         dpll |= DPLL_VCO_ENABLE;
4260         I915_WRITE(DPLL(pipe), dpll);
4261         POSTING_READ(DPLL(pipe));
4262         if (wait_for(((I915_READ(DPLL(pipe)) & DPLL_LOCK_VLV) == DPLL_LOCK_VLV), 1))
4263                 DRM_ERROR("DPLL %d failed to lock\n", pipe);
4264
4265         intel_dpio_write(dev_priv, DPIO_FASTCLK_DISABLE, 0x620);
4266
4267         if (crtc->config.has_dp_encoder)
4268                 intel_dp_set_m_n(crtc);
4269
4270         I915_WRITE(DPLL(pipe), dpll);
4271
4272         /* Wait for the clocks to stabilize. */
4273         POSTING_READ(DPLL(pipe));
4274         udelay(150);
4275
4276         temp = 0;
4277         if (is_sdvo) {
4278                 temp = 0;
4279                 if (crtc->config.pixel_multiplier > 1) {
4280                         temp = (crtc->config.pixel_multiplier - 1)
4281                                 << DPLL_MD_UDI_MULTIPLIER_SHIFT;
4282                 }
4283         }
4284         I915_WRITE(DPLL_MD(pipe), temp);
4285         POSTING_READ(DPLL_MD(pipe));
4286
4287         /* Now program lane control registers */
4288         if(intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_DISPLAYPORT)
4289            || intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_HDMI)) {
4290                 temp = 0x1000C4;
4291                 if(pipe == 1)
4292                         temp |= (1 << 21);
4293                 intel_dpio_write(dev_priv, DPIO_DATA_CHANNEL1, temp);
4294         }
4295
4296         if(intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_EDP)) {
4297                 temp = 0x1000C4;
4298                 if(pipe == 1)
4299                         temp |= (1 << 21);
4300                 intel_dpio_write(dev_priv, DPIO_DATA_CHANNEL2, temp);
4301         }
4302
4303         mutex_unlock(&dev_priv->dpio_lock);
4304 }
4305
4306 static void i9xx_update_pll(struct intel_crtc *crtc,
4307                             intel_clock_t *reduced_clock,
4308                             int num_connectors)
4309 {
4310         struct drm_device *dev = crtc->base.dev;
4311         struct drm_i915_private *dev_priv = dev->dev_private;
4312         struct intel_encoder *encoder;
4313         int pipe = crtc->pipe;
4314         u32 dpll;
4315         bool is_sdvo;
4316         struct dpll *clock = &crtc->config.dpll;
4317
4318         i9xx_update_pll_dividers(crtc, reduced_clock);
4319
4320         is_sdvo = intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_SDVO) ||
4321                 intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_HDMI);
4322
4323         dpll = DPLL_VGA_MODE_DIS;
4324
4325         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS))
4326                 dpll |= DPLLB_MODE_LVDS;
4327         else
4328                 dpll |= DPLLB_MODE_DAC_SERIAL;
4329
4330         if (is_sdvo) {
4331                 if ((crtc->config.pixel_multiplier > 1) &&
4332                     (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))) {
4333                         dpll |= (crtc->config.pixel_multiplier - 1)
4334                                 << SDVO_MULTIPLIER_SHIFT_HIRES;
4335                 }
4336                 dpll |= DPLL_DVO_HIGH_SPEED;
4337         }
4338         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_DISPLAYPORT))
4339                 dpll |= DPLL_DVO_HIGH_SPEED;
4340
4341         /* compute bitmask from p1 value */
4342         if (IS_PINEVIEW(dev))
4343                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
4344         else {
4345                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4346                 if (IS_G4X(dev) && reduced_clock)
4347                         dpll |= (1 << (reduced_clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
4348         }
4349         switch (clock->p2) {
4350         case 5:
4351                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
4352                 break;
4353         case 7:
4354                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
4355                 break;
4356         case 10:
4357                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
4358                 break;
4359         case 14:
4360                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
4361                 break;
4362         }
4363         if (INTEL_INFO(dev)->gen >= 4)
4364                 dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
4365
4366         if (is_sdvo && intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_TVOUT))
4367                 dpll |= PLL_REF_INPUT_TVCLKINBC;
4368         else if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_TVOUT))
4369                 /* XXX: just matching BIOS for now */
4370                 /*      dpll |= PLL_REF_INPUT_TVCLKINBC; */
4371                 dpll |= 3;
4372         else if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
4373                  intel_panel_use_ssc(dev_priv) && num_connectors < 2)
4374                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
4375         else
4376                 dpll |= PLL_REF_INPUT_DREFCLK;
4377
4378         dpll |= DPLL_VCO_ENABLE;
4379         I915_WRITE(DPLL(pipe), dpll & ~DPLL_VCO_ENABLE);
4380         POSTING_READ(DPLL(pipe));
4381         udelay(150);
4382
4383         for_each_encoder_on_crtc(dev, &crtc->base, encoder)
4384                 if (encoder->pre_pll_enable)
4385                         encoder->pre_pll_enable(encoder);
4386
4387         if (crtc->config.has_dp_encoder)
4388                 intel_dp_set_m_n(crtc);
4389
4390         I915_WRITE(DPLL(pipe), dpll);
4391
4392         /* Wait for the clocks to stabilize. */
4393         POSTING_READ(DPLL(pipe));
4394         udelay(150);
4395
4396         if (INTEL_INFO(dev)->gen >= 4) {
4397                 u32 temp = 0;
4398                 if (is_sdvo) {
4399                         temp = 0;
4400                         if (crtc->config.pixel_multiplier > 1) {
4401                                 temp = (crtc->config.pixel_multiplier - 1)
4402                                         << DPLL_MD_UDI_MULTIPLIER_SHIFT;
4403                         }
4404                 }
4405                 I915_WRITE(DPLL_MD(pipe), temp);
4406         } else {
4407                 /* The pixel multiplier can only be updated once the
4408                  * DPLL is enabled and the clocks are stable.
4409                  *
4410                  * So write it again.
4411                  */
4412                 I915_WRITE(DPLL(pipe), dpll);
4413         }
4414 }
4415
4416 static void i8xx_update_pll(struct intel_crtc *crtc,
4417                             struct drm_display_mode *adjusted_mode,
4418                             intel_clock_t *reduced_clock,
4419                             int num_connectors)
4420 {
4421         struct drm_device *dev = crtc->base.dev;
4422         struct drm_i915_private *dev_priv = dev->dev_private;
4423         struct intel_encoder *encoder;
4424         int pipe = crtc->pipe;
4425         u32 dpll;
4426         struct dpll *clock = &crtc->config.dpll;
4427
4428         i9xx_update_pll_dividers(crtc, reduced_clock);
4429
4430         dpll = DPLL_VGA_MODE_DIS;
4431
4432         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS)) {
4433                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4434         } else {
4435                 if (clock->p1 == 2)
4436                         dpll |= PLL_P1_DIVIDE_BY_TWO;
4437                 else
4438                         dpll |= (clock->p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4439                 if (clock->p2 == 4)
4440                         dpll |= PLL_P2_DIVIDE_BY_4;
4441         }
4442
4443         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
4444                  intel_panel_use_ssc(dev_priv) && num_connectors < 2)
4445                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
4446         else
4447                 dpll |= PLL_REF_INPUT_DREFCLK;
4448
4449         dpll |= DPLL_VCO_ENABLE;
4450         I915_WRITE(DPLL(pipe), dpll & ~DPLL_VCO_ENABLE);
4451         POSTING_READ(DPLL(pipe));
4452         udelay(150);
4453
4454         for_each_encoder_on_crtc(dev, &crtc->base, encoder)
4455                 if (encoder->pre_pll_enable)
4456                         encoder->pre_pll_enable(encoder);
4457
4458         I915_WRITE(DPLL(pipe), dpll);
4459
4460         /* Wait for the clocks to stabilize. */
4461         POSTING_READ(DPLL(pipe));
4462         udelay(150);
4463
4464         /* The pixel multiplier can only be updated once the
4465          * DPLL is enabled and the clocks are stable.
4466          *
4467          * So write it again.
4468          */
4469         I915_WRITE(DPLL(pipe), dpll);
4470 }
4471
4472 static void intel_set_pipe_timings(struct intel_crtc *intel_crtc,
4473                                    struct drm_display_mode *mode,
4474                                    struct drm_display_mode *adjusted_mode)
4475 {
4476         struct drm_device *dev = intel_crtc->base.dev;
4477         struct drm_i915_private *dev_priv = dev->dev_private;
4478         enum pipe pipe = intel_crtc->pipe;
4479         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
4480         uint32_t vsyncshift;
4481
4482         if (!IS_GEN2(dev) && adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
4483                 /* the chip adds 2 halflines automatically */
4484                 adjusted_mode->crtc_vtotal -= 1;
4485                 adjusted_mode->crtc_vblank_end -= 1;
4486                 vsyncshift = adjusted_mode->crtc_hsync_start
4487                              - adjusted_mode->crtc_htotal / 2;
4488         } else {
4489                 vsyncshift = 0;
4490         }
4491
4492         if (INTEL_INFO(dev)->gen > 3)
4493                 I915_WRITE(VSYNCSHIFT(cpu_transcoder), vsyncshift);
4494
4495         I915_WRITE(HTOTAL(cpu_transcoder),
4496                    (adjusted_mode->crtc_hdisplay - 1) |
4497                    ((adjusted_mode->crtc_htotal - 1) << 16));
4498         I915_WRITE(HBLANK(cpu_transcoder),
4499                    (adjusted_mode->crtc_hblank_start - 1) |
4500                    ((adjusted_mode->crtc_hblank_end - 1) << 16));
4501         I915_WRITE(HSYNC(cpu_transcoder),
4502                    (adjusted_mode->crtc_hsync_start - 1) |
4503                    ((adjusted_mode->crtc_hsync_end - 1) << 16));
4504
4505         I915_WRITE(VTOTAL(cpu_transcoder),
4506                    (adjusted_mode->crtc_vdisplay - 1) |
4507                    ((adjusted_mode->crtc_vtotal - 1) << 16));
4508         I915_WRITE(VBLANK(cpu_transcoder),
4509                    (adjusted_mode->crtc_vblank_start - 1) |
4510                    ((adjusted_mode->crtc_vblank_end - 1) << 16));
4511         I915_WRITE(VSYNC(cpu_transcoder),
4512                    (adjusted_mode->crtc_vsync_start - 1) |
4513                    ((adjusted_mode->crtc_vsync_end - 1) << 16));
4514
4515         /* Workaround: when the EDP input selection is B, the VTOTAL_B must be
4516          * programmed with the VTOTAL_EDP value. Same for VTOTAL_C. This is
4517          * documented on the DDI_FUNC_CTL register description, EDP Input Select
4518          * bits. */
4519         if (IS_HASWELL(dev) && cpu_transcoder == TRANSCODER_EDP &&
4520             (pipe == PIPE_B || pipe == PIPE_C))
4521                 I915_WRITE(VTOTAL(pipe), I915_READ(VTOTAL(cpu_transcoder)));
4522
4523         /* pipesrc controls the size that is scaled from, which should
4524          * always be the user's requested size.
4525          */
4526         I915_WRITE(PIPESRC(pipe),
4527                    ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
4528 }
4529
4530 static void i9xx_set_pipeconf(struct intel_crtc *intel_crtc)
4531 {
4532         struct drm_device *dev = intel_crtc->base.dev;
4533         struct drm_i915_private *dev_priv = dev->dev_private;
4534         uint32_t pipeconf;
4535
4536         pipeconf = I915_READ(PIPECONF(intel_crtc->pipe));
4537
4538         if (intel_crtc->pipe == 0 && INTEL_INFO(dev)->gen < 4) {
4539                 /* Enable pixel doubling when the dot clock is > 90% of the (display)
4540                  * core speed.
4541                  *
4542                  * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
4543                  * pipe == 0 check?
4544                  */
4545                 if (intel_crtc->config.requested_mode.clock >
4546                     dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
4547                         pipeconf |= PIPECONF_DOUBLE_WIDE;
4548                 else
4549                         pipeconf &= ~PIPECONF_DOUBLE_WIDE;
4550         }
4551
4552         /* default to 8bpc */
4553         pipeconf &= ~(PIPECONF_BPC_MASK | PIPECONF_DITHER_EN);
4554         if (intel_crtc->config.has_dp_encoder) {
4555                 if (intel_crtc->config.dither) {
4556                         pipeconf |= PIPECONF_6BPC |
4557                                     PIPECONF_DITHER_EN |
4558                                     PIPECONF_DITHER_TYPE_SP;
4559                 }
4560         }
4561
4562         if (IS_VALLEYVIEW(dev) && intel_pipe_has_type(&intel_crtc->base,
4563                                                       INTEL_OUTPUT_EDP)) {
4564                 if (intel_crtc->config.dither) {
4565                         pipeconf |= PIPECONF_6BPC |
4566                                         PIPECONF_ENABLE |
4567                                         I965_PIPECONF_ACTIVE;
4568                 }
4569         }
4570
4571         if (HAS_PIPE_CXSR(dev)) {
4572                 if (intel_crtc->lowfreq_avail) {
4573                         DRM_DEBUG_KMS("enabling CxSR downclocking\n");
4574                         pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
4575                 } else {
4576                         DRM_DEBUG_KMS("disabling CxSR downclocking\n");
4577                         pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
4578                 }
4579         }
4580
4581         pipeconf &= ~PIPECONF_INTERLACE_MASK;
4582         if (!IS_GEN2(dev) &&
4583             intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
4584                 pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
4585         else
4586                 pipeconf |= PIPECONF_PROGRESSIVE;
4587
4588         if (IS_VALLEYVIEW(dev)) {
4589                 if (intel_crtc->config.limited_color_range)
4590                         pipeconf |= PIPECONF_COLOR_RANGE_SELECT;
4591                 else
4592                         pipeconf &= ~PIPECONF_COLOR_RANGE_SELECT;
4593         }
4594
4595         I915_WRITE(PIPECONF(intel_crtc->pipe), pipeconf);
4596         POSTING_READ(PIPECONF(intel_crtc->pipe));
4597 }
4598
4599 static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
4600                               int x, int y,
4601                               struct drm_framebuffer *fb)
4602 {
4603         struct drm_device *dev = crtc->dev;
4604         struct drm_i915_private *dev_priv = dev->dev_private;
4605         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4606         struct drm_display_mode *adjusted_mode =
4607                 &intel_crtc->config.adjusted_mode;
4608         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
4609         int pipe = intel_crtc->pipe;
4610         int plane = intel_crtc->plane;
4611         int refclk, num_connectors = 0;
4612         intel_clock_t clock, reduced_clock;
4613         u32 dspcntr;
4614         bool ok, has_reduced_clock = false, is_sdvo = false;
4615         bool is_lvds = false, is_tv = false;
4616         struct intel_encoder *encoder;
4617         const intel_limit_t *limit;
4618         int ret;
4619
4620         for_each_encoder_on_crtc(dev, crtc, encoder) {
4621                 switch (encoder->type) {
4622                 case INTEL_OUTPUT_LVDS:
4623                         is_lvds = true;
4624                         break;
4625                 case INTEL_OUTPUT_SDVO:
4626                 case INTEL_OUTPUT_HDMI:
4627                         is_sdvo = true;
4628                         if (encoder->needs_tv_clock)
4629                                 is_tv = true;
4630                         break;
4631                 case INTEL_OUTPUT_TVOUT:
4632                         is_tv = true;
4633                         break;
4634                 }
4635
4636                 num_connectors++;
4637         }
4638
4639         refclk = i9xx_get_refclk(crtc, num_connectors);
4640
4641         /*
4642          * Returns a set of divisors for the desired target clock with the given
4643          * refclk, or FALSE.  The returned values represent the clock equation:
4644          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
4645          */
4646         limit = intel_limit(crtc, refclk);
4647         ok = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, NULL,
4648                              &clock);
4649         if (!ok) {
4650                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
4651                 return -EINVAL;
4652         }
4653
4654         /* Ensure that the cursor is valid for the new mode before changing... */
4655         intel_crtc_update_cursor(crtc, true);
4656
4657         if (is_lvds && dev_priv->lvds_downclock_avail) {
4658                 /*
4659                  * Ensure we match the reduced clock's P to the target clock.
4660                  * If the clocks don't match, we can't switch the display clock
4661                  * by using the FP0/FP1. In such case we will disable the LVDS
4662                  * downclock feature.
4663                 */
4664                 has_reduced_clock = limit->find_pll(limit, crtc,
4665                                                     dev_priv->lvds_downclock,
4666                                                     refclk,
4667                                                     &clock,
4668                                                     &reduced_clock);
4669         }
4670         /* Compat-code for transition, will disappear. */
4671         if (!intel_crtc->config.clock_set) {
4672                 intel_crtc->config.dpll.n = clock.n;
4673                 intel_crtc->config.dpll.m1 = clock.m1;
4674                 intel_crtc->config.dpll.m2 = clock.m2;
4675                 intel_crtc->config.dpll.p1 = clock.p1;
4676                 intel_crtc->config.dpll.p2 = clock.p2;
4677         }
4678
4679         if (is_sdvo && is_tv)
4680                 i9xx_adjust_sdvo_tv_clock(intel_crtc);
4681
4682         if (IS_GEN2(dev))
4683                 i8xx_update_pll(intel_crtc, adjusted_mode,
4684                                 has_reduced_clock ? &reduced_clock : NULL,
4685                                 num_connectors);
4686         else if (IS_VALLEYVIEW(dev))
4687                 vlv_update_pll(intel_crtc);
4688         else
4689                 i9xx_update_pll(intel_crtc,
4690                                 has_reduced_clock ? &reduced_clock : NULL,
4691                                 num_connectors);
4692
4693         /* Set up the display plane register */
4694         dspcntr = DISPPLANE_GAMMA_ENABLE;
4695
4696         if (!IS_VALLEYVIEW(dev)) {
4697                 if (pipe == 0)
4698                         dspcntr &= ~DISPPLANE_SEL_PIPE_MASK;
4699                 else
4700                         dspcntr |= DISPPLANE_SEL_PIPE_B;
4701         }
4702
4703         DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
4704         drm_mode_debug_printmodeline(mode);
4705
4706         intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
4707
4708         /* pipesrc and dspsize control the size that is scaled from,
4709          * which should always be the user's requested size.
4710          */
4711         I915_WRITE(DSPSIZE(plane),
4712                    ((mode->vdisplay - 1) << 16) |
4713                    (mode->hdisplay - 1));
4714         I915_WRITE(DSPPOS(plane), 0);
4715
4716         i9xx_set_pipeconf(intel_crtc);
4717
4718         intel_enable_pipe(dev_priv, pipe, false);
4719
4720         intel_wait_for_vblank(dev, pipe);
4721
4722         I915_WRITE(DSPCNTR(plane), dspcntr);
4723         POSTING_READ(DSPCNTR(plane));
4724
4725         ret = intel_pipe_set_base(crtc, x, y, fb);
4726
4727         intel_update_watermarks(dev);
4728
4729         return ret;
4730 }
4731
4732 static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
4733                                  struct intel_crtc_config *pipe_config)
4734 {
4735         struct drm_device *dev = crtc->base.dev;
4736         struct drm_i915_private *dev_priv = dev->dev_private;
4737         uint32_t tmp;
4738
4739         tmp = I915_READ(PIPECONF(crtc->pipe));
4740         if (!(tmp & PIPECONF_ENABLE))
4741                 return false;
4742
4743         return true;
4744 }
4745
4746 static void ironlake_init_pch_refclk(struct drm_device *dev)
4747 {
4748         struct drm_i915_private *dev_priv = dev->dev_private;
4749         struct drm_mode_config *mode_config = &dev->mode_config;
4750         struct intel_encoder *encoder;
4751         u32 val, final;
4752         bool has_lvds = false;
4753         bool has_cpu_edp = false;
4754         bool has_pch_edp = false;
4755         bool has_panel = false;
4756         bool has_ck505 = false;
4757         bool can_ssc = false;
4758
4759         /* We need to take the global config into account */
4760         list_for_each_entry(encoder, &mode_config->encoder_list,
4761                             base.head) {
4762                 switch (encoder->type) {
4763                 case INTEL_OUTPUT_LVDS:
4764                         has_panel = true;
4765                         has_lvds = true;
4766                         break;
4767                 case INTEL_OUTPUT_EDP:
4768                         has_panel = true;
4769                         if (intel_encoder_is_pch_edp(&encoder->base))
4770                                 has_pch_edp = true;
4771                         else
4772                                 has_cpu_edp = true;
4773                         break;
4774                 }
4775         }
4776
4777         if (HAS_PCH_IBX(dev)) {
4778                 has_ck505 = dev_priv->display_clock_mode;
4779                 can_ssc = has_ck505;
4780         } else {
4781                 has_ck505 = false;
4782                 can_ssc = true;
4783         }
4784
4785         DRM_DEBUG_KMS("has_panel %d has_lvds %d has_pch_edp %d has_cpu_edp %d has_ck505 %d\n",
4786                       has_panel, has_lvds, has_pch_edp, has_cpu_edp,
4787                       has_ck505);
4788
4789         /* Ironlake: try to setup display ref clock before DPLL
4790          * enabling. This is only under driver's control after
4791          * PCH B stepping, previous chipset stepping should be
4792          * ignoring this setting.
4793          */
4794         val = I915_READ(PCH_DREF_CONTROL);
4795
4796         /* As we must carefully and slowly disable/enable each source in turn,
4797          * compute the final state we want first and check if we need to
4798          * make any changes at all.
4799          */
4800         final = val;
4801         final &= ~DREF_NONSPREAD_SOURCE_MASK;
4802         if (has_ck505)
4803                 final |= DREF_NONSPREAD_CK505_ENABLE;
4804         else
4805                 final |= DREF_NONSPREAD_SOURCE_ENABLE;
4806
4807         final &= ~DREF_SSC_SOURCE_MASK;
4808         final &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
4809         final &= ~DREF_SSC1_ENABLE;
4810
4811         if (has_panel) {
4812                 final |= DREF_SSC_SOURCE_ENABLE;
4813
4814                 if (intel_panel_use_ssc(dev_priv) && can_ssc)
4815                         final |= DREF_SSC1_ENABLE;
4816
4817                 if (has_cpu_edp) {
4818                         if (intel_panel_use_ssc(dev_priv) && can_ssc)
4819                                 final |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
4820                         else
4821                                 final |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
4822                 } else
4823                         final |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
4824         } else {
4825                 final |= DREF_SSC_SOURCE_DISABLE;
4826                 final |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
4827         }
4828
4829         if (final == val)
4830                 return;
4831
4832         /* Always enable nonspread source */
4833         val &= ~DREF_NONSPREAD_SOURCE_MASK;
4834
4835         if (has_ck505)
4836                 val |= DREF_NONSPREAD_CK505_ENABLE;
4837         else
4838                 val |= DREF_NONSPREAD_SOURCE_ENABLE;
4839
4840         if (has_panel) {
4841                 val &= ~DREF_SSC_SOURCE_MASK;
4842                 val |= DREF_SSC_SOURCE_ENABLE;
4843
4844                 /* SSC must be turned on before enabling the CPU output  */
4845                 if (intel_panel_use_ssc(dev_priv) && can_ssc) {
4846                         DRM_DEBUG_KMS("Using SSC on panel\n");
4847                         val |= DREF_SSC1_ENABLE;
4848                 } else
4849                         val &= ~DREF_SSC1_ENABLE;
4850
4851                 /* Get SSC going before enabling the outputs */
4852                 I915_WRITE(PCH_DREF_CONTROL, val);
4853                 POSTING_READ(PCH_DREF_CONTROL);
4854                 udelay(200);
4855
4856                 val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
4857
4858                 /* Enable CPU source on CPU attached eDP */
4859                 if (has_cpu_edp) {
4860                         if (intel_panel_use_ssc(dev_priv) && can_ssc) {
4861                                 DRM_DEBUG_KMS("Using SSC on eDP\n");
4862                                 val |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
4863                         }
4864                         else
4865                                 val |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
4866                 } else
4867                         val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
4868
4869                 I915_WRITE(PCH_DREF_CONTROL, val);
4870                 POSTING_READ(PCH_DREF_CONTROL);
4871                 udelay(200);
4872         } else {
4873                 DRM_DEBUG_KMS("Disabling SSC entirely\n");
4874
4875                 val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
4876
4877                 /* Turn off CPU output */
4878                 val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
4879
4880                 I915_WRITE(PCH_DREF_CONTROL, val);
4881                 POSTING_READ(PCH_DREF_CONTROL);
4882                 udelay(200);
4883
4884                 /* Turn off the SSC source */
4885                 val &= ~DREF_SSC_SOURCE_MASK;
4886                 val |= DREF_SSC_SOURCE_DISABLE;
4887
4888                 /* Turn off SSC1 */
4889                 val &= ~DREF_SSC1_ENABLE;
4890
4891                 I915_WRITE(PCH_DREF_CONTROL, val);
4892                 POSTING_READ(PCH_DREF_CONTROL);
4893                 udelay(200);
4894         }
4895
4896         BUG_ON(val != final);
4897 }
4898
4899 /* Sequence to enable CLKOUT_DP for FDI usage and configure PCH FDI I/O. */
4900 static void lpt_init_pch_refclk(struct drm_device *dev)
4901 {
4902         struct drm_i915_private *dev_priv = dev->dev_private;
4903         struct drm_mode_config *mode_config = &dev->mode_config;
4904         struct intel_encoder *encoder;
4905         bool has_vga = false;
4906         bool is_sdv = false;
4907         u32 tmp;
4908
4909         list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
4910                 switch (encoder->type) {
4911                 case INTEL_OUTPUT_ANALOG:
4912                         has_vga = true;
4913                         break;
4914                 }
4915         }
4916
4917         if (!has_vga)
4918                 return;
4919
4920         mutex_lock(&dev_priv->dpio_lock);
4921
4922         /* XXX: Rip out SDV support once Haswell ships for real. */
4923         if (IS_HASWELL(dev) && (dev->pci_device & 0xFF00) == 0x0C00)
4924                 is_sdv = true;
4925
4926         tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
4927         tmp &= ~SBI_SSCCTL_DISABLE;
4928         tmp |= SBI_SSCCTL_PATHALT;
4929         intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
4930
4931         udelay(24);
4932
4933         tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
4934         tmp &= ~SBI_SSCCTL_PATHALT;
4935         intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
4936
4937         if (!is_sdv) {
4938                 tmp = I915_READ(SOUTH_CHICKEN2);
4939                 tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
4940                 I915_WRITE(SOUTH_CHICKEN2, tmp);
4941
4942                 if (wait_for_atomic_us(I915_READ(SOUTH_CHICKEN2) &
4943                                        FDI_MPHY_IOSFSB_RESET_STATUS, 100))
4944                         DRM_ERROR("FDI mPHY reset assert timeout\n");
4945
4946                 tmp = I915_READ(SOUTH_CHICKEN2);
4947                 tmp &= ~FDI_MPHY_IOSFSB_RESET_CTL;
4948                 I915_WRITE(SOUTH_CHICKEN2, tmp);
4949
4950                 if (wait_for_atomic_us((I915_READ(SOUTH_CHICKEN2) &
4951                                         FDI_MPHY_IOSFSB_RESET_STATUS) == 0,
4952                                        100))
4953                         DRM_ERROR("FDI mPHY reset de-assert timeout\n");
4954         }
4955
4956         tmp = intel_sbi_read(dev_priv, 0x8008, SBI_MPHY);
4957         tmp &= ~(0xFF << 24);
4958         tmp |= (0x12 << 24);
4959         intel_sbi_write(dev_priv, 0x8008, tmp, SBI_MPHY);
4960
4961         if (is_sdv) {
4962                 tmp = intel_sbi_read(dev_priv, 0x800C, SBI_MPHY);
4963                 tmp |= 0x7FFF;
4964                 intel_sbi_write(dev_priv, 0x800C, tmp, SBI_MPHY);
4965         }
4966
4967         tmp = intel_sbi_read(dev_priv, 0x2008, SBI_MPHY);
4968         tmp |= (1 << 11);
4969         intel_sbi_write(dev_priv, 0x2008, tmp, SBI_MPHY);
4970
4971         tmp = intel_sbi_read(dev_priv, 0x2108, SBI_MPHY);
4972         tmp |= (1 << 11);
4973         intel_sbi_write(dev_priv, 0x2108, tmp, SBI_MPHY);
4974
4975         if (is_sdv) {
4976                 tmp = intel_sbi_read(dev_priv, 0x2038, SBI_MPHY);
4977                 tmp |= (0x3F << 24) | (0xF << 20) | (0xF << 16);
4978                 intel_sbi_write(dev_priv, 0x2038, tmp, SBI_MPHY);
4979
4980                 tmp = intel_sbi_read(dev_priv, 0x2138, SBI_MPHY);
4981                 tmp |= (0x3F << 24) | (0xF << 20) | (0xF << 16);
4982                 intel_sbi_write(dev_priv, 0x2138, tmp, SBI_MPHY);
4983
4984                 tmp = intel_sbi_read(dev_priv, 0x203C, SBI_MPHY);
4985                 tmp |= (0x3F << 8);
4986                 intel_sbi_write(dev_priv, 0x203C, tmp, SBI_MPHY);
4987
4988                 tmp = intel_sbi_read(dev_priv, 0x213C, SBI_MPHY);
4989                 tmp |= (0x3F << 8);
4990                 intel_sbi_write(dev_priv, 0x213C, tmp, SBI_MPHY);
4991         }
4992
4993         tmp = intel_sbi_read(dev_priv, 0x206C, SBI_MPHY);
4994         tmp |= (1 << 24) | (1 << 21) | (1 << 18);
4995         intel_sbi_write(dev_priv, 0x206C, tmp, SBI_MPHY);
4996
4997         tmp = intel_sbi_read(dev_priv, 0x216C, SBI_MPHY);
4998         tmp |= (1 << 24) | (1 << 21) | (1 << 18);
4999         intel_sbi_write(dev_priv, 0x216C, tmp, SBI_MPHY);
5000
5001         if (!is_sdv) {
5002                 tmp = intel_sbi_read(dev_priv, 0x2080, SBI_MPHY);
5003                 tmp &= ~(7 << 13);
5004                 tmp |= (5 << 13);
5005                 intel_sbi_write(dev_priv, 0x2080, tmp, SBI_MPHY);
5006
5007                 tmp = intel_sbi_read(dev_priv, 0x2180, SBI_MPHY);
5008                 tmp &= ~(7 << 13);
5009                 tmp |= (5 << 13);
5010                 intel_sbi_write(dev_priv, 0x2180, tmp, SBI_MPHY);
5011         }
5012
5013         tmp = intel_sbi_read(dev_priv, 0x208C, SBI_MPHY);
5014         tmp &= ~0xFF;
5015         tmp |= 0x1C;
5016         intel_sbi_write(dev_priv, 0x208C, tmp, SBI_MPHY);
5017
5018         tmp = intel_sbi_read(dev_priv, 0x218C, SBI_MPHY);
5019         tmp &= ~0xFF;
5020         tmp |= 0x1C;
5021         intel_sbi_write(dev_priv, 0x218C, tmp, SBI_MPHY);
5022
5023         tmp = intel_sbi_read(dev_priv, 0x2098, SBI_MPHY);
5024         tmp &= ~(0xFF << 16);
5025         tmp |= (0x1C << 16);
5026         intel_sbi_write(dev_priv, 0x2098, tmp, SBI_MPHY);
5027
5028         tmp = intel_sbi_read(dev_priv, 0x2198, SBI_MPHY);
5029         tmp &= ~(0xFF << 16);
5030         tmp |= (0x1C << 16);
5031         intel_sbi_write(dev_priv, 0x2198, tmp, SBI_MPHY);
5032
5033         if (!is_sdv) {
5034                 tmp = intel_sbi_read(dev_priv, 0x20C4, SBI_MPHY);
5035                 tmp |= (1 << 27);
5036                 intel_sbi_write(dev_priv, 0x20C4, tmp, SBI_MPHY);
5037
5038                 tmp = intel_sbi_read(dev_priv, 0x21C4, SBI_MPHY);
5039                 tmp |= (1 << 27);
5040                 intel_sbi_write(dev_priv, 0x21C4, tmp, SBI_MPHY);
5041
5042                 tmp = intel_sbi_read(dev_priv, 0x20EC, SBI_MPHY);
5043                 tmp &= ~(0xF << 28);
5044                 tmp |= (4 << 28);
5045                 intel_sbi_write(dev_priv, 0x20EC, tmp, SBI_MPHY);
5046
5047                 tmp = intel_sbi_read(dev_priv, 0x21EC, SBI_MPHY);
5048                 tmp &= ~(0xF << 28);
5049                 tmp |= (4 << 28);
5050                 intel_sbi_write(dev_priv, 0x21EC, tmp, SBI_MPHY);
5051         }
5052
5053         /* ULT uses SBI_GEN0, but ULT doesn't have VGA, so we don't care. */
5054         tmp = intel_sbi_read(dev_priv, SBI_DBUFF0, SBI_ICLK);
5055         tmp |= SBI_DBUFF0_ENABLE;
5056         intel_sbi_write(dev_priv, SBI_DBUFF0, tmp, SBI_ICLK);
5057
5058         mutex_unlock(&dev_priv->dpio_lock);
5059 }
5060
5061 /*
5062  * Initialize reference clocks when the driver loads
5063  */
5064 void intel_init_pch_refclk(struct drm_device *dev)
5065 {
5066         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
5067                 ironlake_init_pch_refclk(dev);
5068         else if (HAS_PCH_LPT(dev))
5069                 lpt_init_pch_refclk(dev);
5070 }
5071
5072 static int ironlake_get_refclk(struct drm_crtc *crtc)
5073 {
5074         struct drm_device *dev = crtc->dev;
5075         struct drm_i915_private *dev_priv = dev->dev_private;
5076         struct intel_encoder *encoder;
5077         struct intel_encoder *edp_encoder = NULL;
5078         int num_connectors = 0;
5079         bool is_lvds = false;
5080
5081         for_each_encoder_on_crtc(dev, crtc, encoder) {
5082                 switch (encoder->type) {
5083                 case INTEL_OUTPUT_LVDS:
5084                         is_lvds = true;
5085                         break;
5086                 case INTEL_OUTPUT_EDP:
5087                         edp_encoder = encoder;
5088                         break;
5089                 }
5090                 num_connectors++;
5091         }
5092
5093         if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
5094                 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
5095                               dev_priv->lvds_ssc_freq);
5096                 return dev_priv->lvds_ssc_freq * 1000;
5097         }
5098
5099         return 120000;
5100 }
5101
5102 static void ironlake_set_pipeconf(struct drm_crtc *crtc,
5103                                   struct drm_display_mode *adjusted_mode,
5104                                   bool dither)
5105 {
5106         struct drm_i915_private *dev_priv = crtc->dev->dev_private;
5107         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5108         int pipe = intel_crtc->pipe;
5109         uint32_t val;
5110
5111         val = I915_READ(PIPECONF(pipe));
5112
5113         val &= ~PIPECONF_BPC_MASK;
5114         switch (intel_crtc->config.pipe_bpp) {
5115         case 18:
5116                 val |= PIPECONF_6BPC;
5117                 break;
5118         case 24:
5119                 val |= PIPECONF_8BPC;
5120                 break;
5121         case 30:
5122                 val |= PIPECONF_10BPC;
5123                 break;
5124         case 36:
5125                 val |= PIPECONF_12BPC;
5126                 break;
5127         default:
5128                 /* Case prevented by intel_choose_pipe_bpp_dither. */
5129                 BUG();
5130         }
5131
5132         val &= ~(PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_MASK);
5133         if (dither)
5134                 val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
5135
5136         val &= ~PIPECONF_INTERLACE_MASK;
5137         if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
5138                 val |= PIPECONF_INTERLACED_ILK;
5139         else
5140                 val |= PIPECONF_PROGRESSIVE;
5141
5142         if (intel_crtc->config.limited_color_range)
5143                 val |= PIPECONF_COLOR_RANGE_SELECT;
5144         else
5145                 val &= ~PIPECONF_COLOR_RANGE_SELECT;
5146
5147         I915_WRITE(PIPECONF(pipe), val);
5148         POSTING_READ(PIPECONF(pipe));
5149 }
5150
5151 /*
5152  * Set up the pipe CSC unit.
5153  *
5154  * Currently only full range RGB to limited range RGB conversion
5155  * is supported, but eventually this should handle various
5156  * RGB<->YCbCr scenarios as well.
5157  */
5158 static void intel_set_pipe_csc(struct drm_crtc *crtc)
5159 {
5160         struct drm_device *dev = crtc->dev;
5161         struct drm_i915_private *dev_priv = dev->dev_private;
5162         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5163         int pipe = intel_crtc->pipe;
5164         uint16_t coeff = 0x7800; /* 1.0 */
5165
5166         /*
5167          * TODO: Check what kind of values actually come out of the pipe
5168          * with these coeff/postoff values and adjust to get the best
5169          * accuracy. Perhaps we even need to take the bpc value into
5170          * consideration.
5171          */
5172
5173         if (intel_crtc->config.limited_color_range)
5174                 coeff = ((235 - 16) * (1 << 12) / 255) & 0xff8; /* 0.xxx... */
5175
5176         /*
5177          * GY/GU and RY/RU should be the other way around according
5178          * to BSpec, but reality doesn't agree. Just set them up in
5179          * a way that results in the correct picture.
5180          */
5181         I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), coeff << 16);
5182         I915_WRITE(PIPE_CSC_COEFF_BY(pipe), 0);
5183
5184         I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), coeff);
5185         I915_WRITE(PIPE_CSC_COEFF_BU(pipe), 0);
5186
5187         I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), 0);
5188         I915_WRITE(PIPE_CSC_COEFF_BV(pipe), coeff << 16);
5189
5190         I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0);
5191         I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0);
5192         I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), 0);
5193
5194         if (INTEL_INFO(dev)->gen > 6) {
5195                 uint16_t postoff = 0;
5196
5197                 if (intel_crtc->config.limited_color_range)
5198                         postoff = (16 * (1 << 13) / 255) & 0x1fff;
5199
5200                 I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), postoff);
5201                 I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), postoff);
5202                 I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), postoff);
5203
5204                 I915_WRITE(PIPE_CSC_MODE(pipe), 0);
5205         } else {
5206                 uint32_t mode = CSC_MODE_YUV_TO_RGB;
5207
5208                 if (intel_crtc->config.limited_color_range)
5209                         mode |= CSC_BLACK_SCREEN_OFFSET;
5210
5211                 I915_WRITE(PIPE_CSC_MODE(pipe), mode);
5212         }
5213 }
5214
5215 static void haswell_set_pipeconf(struct drm_crtc *crtc,
5216                                  struct drm_display_mode *adjusted_mode,
5217                                  bool dither)
5218 {
5219         struct drm_i915_private *dev_priv = crtc->dev->dev_private;
5220         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5221         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
5222         uint32_t val;
5223
5224         val = I915_READ(PIPECONF(cpu_transcoder));
5225
5226         val &= ~(PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_MASK);
5227         if (dither)
5228                 val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
5229
5230         val &= ~PIPECONF_INTERLACE_MASK_HSW;
5231         if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
5232                 val |= PIPECONF_INTERLACED_ILK;
5233         else
5234                 val |= PIPECONF_PROGRESSIVE;
5235
5236         I915_WRITE(PIPECONF(cpu_transcoder), val);
5237         POSTING_READ(PIPECONF(cpu_transcoder));
5238 }
5239
5240 static bool ironlake_compute_clocks(struct drm_crtc *crtc,
5241                                     struct drm_display_mode *adjusted_mode,
5242                                     intel_clock_t *clock,
5243                                     bool *has_reduced_clock,
5244                                     intel_clock_t *reduced_clock)
5245 {
5246         struct drm_device *dev = crtc->dev;
5247         struct drm_i915_private *dev_priv = dev->dev_private;
5248         struct intel_encoder *intel_encoder;
5249         int refclk;
5250         const intel_limit_t *limit;
5251         bool ret, is_sdvo = false, is_tv = false, is_lvds = false;
5252
5253         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
5254                 switch (intel_encoder->type) {
5255                 case INTEL_OUTPUT_LVDS:
5256                         is_lvds = true;
5257                         break;
5258                 case INTEL_OUTPUT_SDVO:
5259                 case INTEL_OUTPUT_HDMI:
5260                         is_sdvo = true;
5261                         if (intel_encoder->needs_tv_clock)
5262                                 is_tv = true;
5263                         break;
5264                 case INTEL_OUTPUT_TVOUT:
5265                         is_tv = true;
5266                         break;
5267                 }
5268         }
5269
5270         refclk = ironlake_get_refclk(crtc);
5271
5272         /*
5273          * Returns a set of divisors for the desired target clock with the given
5274          * refclk, or FALSE.  The returned values represent the clock equation:
5275          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
5276          */
5277         limit = intel_limit(crtc, refclk);
5278         ret = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, NULL,
5279                               clock);
5280         if (!ret)
5281                 return false;
5282
5283         if (is_lvds && dev_priv->lvds_downclock_avail) {
5284                 /*
5285                  * Ensure we match the reduced clock's P to the target clock.
5286                  * If the clocks don't match, we can't switch the display clock
5287                  * by using the FP0/FP1. In such case we will disable the LVDS
5288                  * downclock feature.
5289                 */
5290                 *has_reduced_clock = limit->find_pll(limit, crtc,
5291                                                      dev_priv->lvds_downclock,
5292                                                      refclk,
5293                                                      clock,
5294                                                      reduced_clock);
5295         }
5296
5297         if (is_sdvo && is_tv)
5298                 i9xx_adjust_sdvo_tv_clock(to_intel_crtc(crtc));
5299
5300         return true;
5301 }
5302
5303 static void cpt_enable_fdi_bc_bifurcation(struct drm_device *dev)
5304 {
5305         struct drm_i915_private *dev_priv = dev->dev_private;
5306         uint32_t temp;
5307
5308         temp = I915_READ(SOUTH_CHICKEN1);
5309         if (temp & FDI_BC_BIFURCATION_SELECT)
5310                 return;
5311
5312         WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
5313         WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
5314
5315         temp |= FDI_BC_BIFURCATION_SELECT;
5316         DRM_DEBUG_KMS("enabling fdi C rx\n");
5317         I915_WRITE(SOUTH_CHICKEN1, temp);
5318         POSTING_READ(SOUTH_CHICKEN1);
5319 }
5320
5321 static bool ironlake_check_fdi_lanes(struct intel_crtc *intel_crtc)
5322 {
5323         struct drm_device *dev = intel_crtc->base.dev;
5324         struct drm_i915_private *dev_priv = dev->dev_private;
5325         struct intel_crtc *pipe_B_crtc =
5326                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_B]);
5327
5328         DRM_DEBUG_KMS("checking fdi config on pipe %i, lanes %i\n",
5329                       intel_crtc->pipe, intel_crtc->fdi_lanes);
5330         if (intel_crtc->fdi_lanes > 4) {
5331                 DRM_DEBUG_KMS("invalid fdi lane config on pipe %i: %i lanes\n",
5332                               intel_crtc->pipe, intel_crtc->fdi_lanes);
5333                 /* Clamp lanes to avoid programming the hw with bogus values. */
5334                 intel_crtc->fdi_lanes = 4;
5335
5336                 return false;
5337         }
5338
5339         if (INTEL_INFO(dev)->num_pipes == 2)
5340                 return true;
5341
5342         switch (intel_crtc->pipe) {
5343         case PIPE_A:
5344                 return true;
5345         case PIPE_B:
5346                 if (dev_priv->pipe_to_crtc_mapping[PIPE_C]->enabled &&
5347                     intel_crtc->fdi_lanes > 2) {
5348                         DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %i: %i lanes\n",
5349                                       intel_crtc->pipe, intel_crtc->fdi_lanes);
5350                         /* Clamp lanes to avoid programming the hw with bogus values. */
5351                         intel_crtc->fdi_lanes = 2;
5352
5353                         return false;
5354                 }
5355
5356                 if (intel_crtc->fdi_lanes > 2)
5357                         WARN_ON(I915_READ(SOUTH_CHICKEN1) & FDI_BC_BIFURCATION_SELECT);
5358                 else
5359                         cpt_enable_fdi_bc_bifurcation(dev);
5360
5361                 return true;
5362         case PIPE_C:
5363                 if (!pipe_B_crtc->base.enabled || pipe_B_crtc->fdi_lanes <= 2) {
5364                         if (intel_crtc->fdi_lanes > 2) {
5365                                 DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %i: %i lanes\n",
5366                                               intel_crtc->pipe, intel_crtc->fdi_lanes);
5367                                 /* Clamp lanes to avoid programming the hw with bogus values. */
5368                                 intel_crtc->fdi_lanes = 2;
5369
5370                                 return false;
5371                         }
5372                 } else {
5373                         DRM_DEBUG_KMS("fdi link B uses too many lanes to enable link C\n");
5374                         return false;
5375                 }
5376
5377                 cpt_enable_fdi_bc_bifurcation(dev);
5378
5379                 return true;
5380         default:
5381                 BUG();
5382         }
5383 }
5384
5385 int ironlake_get_lanes_required(int target_clock, int link_bw, int bpp)
5386 {
5387         /*
5388          * Account for spread spectrum to avoid
5389          * oversubscribing the link. Max center spread
5390          * is 2.5%; use 5% for safety's sake.
5391          */
5392         u32 bps = target_clock * bpp * 21 / 20;
5393         return bps / (link_bw * 8) + 1;
5394 }
5395
5396 void intel_pch_transcoder_set_m_n(struct intel_crtc *crtc,
5397                                   struct intel_link_m_n *m_n)
5398 {
5399         struct drm_device *dev = crtc->base.dev;
5400         struct drm_i915_private *dev_priv = dev->dev_private;
5401         int pipe = crtc->pipe;
5402
5403         I915_WRITE(TRANSDATA_M1(pipe), TU_SIZE(m_n->tu) | m_n->gmch_m);
5404         I915_WRITE(TRANSDATA_N1(pipe), m_n->gmch_n);
5405         I915_WRITE(TRANSDPLINK_M1(pipe), m_n->link_m);
5406         I915_WRITE(TRANSDPLINK_N1(pipe), m_n->link_n);
5407 }
5408
5409 void intel_cpu_transcoder_set_m_n(struct intel_crtc *crtc,
5410                                   struct intel_link_m_n *m_n)
5411 {
5412         struct drm_device *dev = crtc->base.dev;
5413         struct drm_i915_private *dev_priv = dev->dev_private;
5414         int pipe = crtc->pipe;
5415         enum transcoder transcoder = crtc->cpu_transcoder;
5416
5417         if (INTEL_INFO(dev)->gen >= 5) {
5418                 I915_WRITE(PIPE_DATA_M1(transcoder), TU_SIZE(m_n->tu) | m_n->gmch_m);
5419                 I915_WRITE(PIPE_DATA_N1(transcoder), m_n->gmch_n);
5420                 I915_WRITE(PIPE_LINK_M1(transcoder), m_n->link_m);
5421                 I915_WRITE(PIPE_LINK_N1(transcoder), m_n->link_n);
5422         } else {
5423                 I915_WRITE(PIPE_GMCH_DATA_M(pipe), TU_SIZE(m_n->tu) | m_n->gmch_m);
5424                 I915_WRITE(PIPE_GMCH_DATA_N(pipe), m_n->gmch_n);
5425                 I915_WRITE(PIPE_DP_LINK_M(pipe), m_n->link_m);
5426                 I915_WRITE(PIPE_DP_LINK_N(pipe), m_n->link_n);
5427         }
5428 }
5429
5430 static void ironlake_fdi_set_m_n(struct drm_crtc *crtc)
5431 {
5432         struct drm_device *dev = crtc->dev;
5433         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5434         struct drm_display_mode *adjusted_mode =
5435                 &intel_crtc->config.adjusted_mode;
5436         struct intel_link_m_n m_n = {0};
5437         int target_clock, lane, link_bw;
5438
5439         /* FDI is a binary signal running at ~2.7GHz, encoding
5440          * each output octet as 10 bits. The actual frequency
5441          * is stored as a divider into a 100MHz clock, and the
5442          * mode pixel clock is stored in units of 1KHz.
5443          * Hence the bw of each lane in terms of the mode signal
5444          * is:
5445          */
5446         link_bw = intel_fdi_link_freq(dev) * MHz(100)/KHz(1)/10;
5447
5448         if (intel_crtc->config.pixel_target_clock)
5449                 target_clock = intel_crtc->config.pixel_target_clock;
5450         else
5451                 target_clock = adjusted_mode->clock;
5452
5453         lane = ironlake_get_lanes_required(target_clock, link_bw,
5454                                            intel_crtc->config.pipe_bpp);
5455
5456         intel_crtc->fdi_lanes = lane;
5457
5458         if (intel_crtc->config.pixel_multiplier > 1)
5459                 link_bw *= intel_crtc->config.pixel_multiplier;
5460         intel_link_compute_m_n(intel_crtc->config.pipe_bpp, lane, target_clock,
5461                                link_bw, &m_n);
5462
5463         intel_cpu_transcoder_set_m_n(intel_crtc, &m_n);
5464 }
5465
5466 static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
5467                                       intel_clock_t *clock, u32 *fp,
5468                                       intel_clock_t *reduced_clock, u32 *fp2)
5469 {
5470         struct drm_crtc *crtc = &intel_crtc->base;
5471         struct drm_device *dev = crtc->dev;
5472         struct drm_i915_private *dev_priv = dev->dev_private;
5473         struct intel_encoder *intel_encoder;
5474         uint32_t dpll;
5475         int factor, num_connectors = 0;
5476         bool is_lvds = false, is_sdvo = false, is_tv = false;
5477
5478         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
5479                 switch (intel_encoder->type) {
5480                 case INTEL_OUTPUT_LVDS:
5481                         is_lvds = true;
5482                         break;
5483                 case INTEL_OUTPUT_SDVO:
5484                 case INTEL_OUTPUT_HDMI:
5485                         is_sdvo = true;
5486                         if (intel_encoder->needs_tv_clock)
5487                                 is_tv = true;
5488                         break;
5489                 case INTEL_OUTPUT_TVOUT:
5490                         is_tv = true;
5491                         break;
5492                 }
5493
5494                 num_connectors++;
5495         }
5496
5497         /* Enable autotuning of the PLL clock (if permissible) */
5498         factor = 21;
5499         if (is_lvds) {
5500                 if ((intel_panel_use_ssc(dev_priv) &&
5501                      dev_priv->lvds_ssc_freq == 100) ||
5502                     (HAS_PCH_IBX(dev) && intel_is_dual_link_lvds(dev)))
5503                         factor = 25;
5504         } else if (is_sdvo && is_tv)
5505                 factor = 20;
5506
5507         if (clock->m < factor * clock->n)
5508                 *fp |= FP_CB_TUNE;
5509
5510         if (fp2 && (reduced_clock->m < factor * reduced_clock->n))
5511                 *fp2 |= FP_CB_TUNE;
5512
5513         dpll = 0;
5514
5515         if (is_lvds)
5516                 dpll |= DPLLB_MODE_LVDS;
5517         else
5518                 dpll |= DPLLB_MODE_DAC_SERIAL;
5519         if (is_sdvo) {
5520                 if (intel_crtc->config.pixel_multiplier > 1) {
5521                         dpll |= (intel_crtc->config.pixel_multiplier - 1)
5522                                 << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
5523                 }
5524                 dpll |= DPLL_DVO_HIGH_SPEED;
5525         }
5526         if (intel_crtc->config.has_dp_encoder &&
5527             intel_crtc->config.has_pch_encoder)
5528                 dpll |= DPLL_DVO_HIGH_SPEED;
5529
5530         /* compute bitmask from p1 value */
5531         dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
5532         /* also FPA1 */
5533         dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
5534
5535         switch (clock->p2) {
5536         case 5:
5537                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
5538                 break;
5539         case 7:
5540                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
5541                 break;
5542         case 10:
5543                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
5544                 break;
5545         case 14:
5546                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
5547                 break;
5548         }
5549
5550         if (is_sdvo && is_tv)
5551                 dpll |= PLL_REF_INPUT_TVCLKINBC;
5552         else if (is_tv)
5553                 /* XXX: just matching BIOS for now */
5554                 /*      dpll |= PLL_REF_INPUT_TVCLKINBC; */
5555                 dpll |= 3;
5556         else if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
5557                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
5558         else
5559                 dpll |= PLL_REF_INPUT_DREFCLK;
5560
5561         return dpll;
5562 }
5563
5564 static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
5565                                   int x, int y,
5566                                   struct drm_framebuffer *fb)
5567 {
5568         struct drm_device *dev = crtc->dev;
5569         struct drm_i915_private *dev_priv = dev->dev_private;
5570         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5571         struct drm_display_mode *adjusted_mode =
5572                 &intel_crtc->config.adjusted_mode;
5573         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
5574         int pipe = intel_crtc->pipe;
5575         int plane = intel_crtc->plane;
5576         int num_connectors = 0;
5577         intel_clock_t clock, reduced_clock;
5578         u32 dpll, fp = 0, fp2 = 0;
5579         bool ok, has_reduced_clock = false;
5580         bool is_lvds = false;
5581         struct intel_encoder *encoder;
5582         int ret;
5583         bool dither, fdi_config_ok;
5584
5585         for_each_encoder_on_crtc(dev, crtc, encoder) {
5586                 switch (encoder->type) {
5587                 case INTEL_OUTPUT_LVDS:
5588                         is_lvds = true;
5589                         break;
5590                 }
5591
5592                 num_connectors++;
5593         }
5594
5595         WARN(!(HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)),
5596              "Unexpected PCH type %d\n", INTEL_PCH_TYPE(dev));
5597
5598         intel_crtc->cpu_transcoder = pipe;
5599
5600         ok = ironlake_compute_clocks(crtc, adjusted_mode, &clock,
5601                                      &has_reduced_clock, &reduced_clock);
5602         if (!ok) {
5603                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
5604                 return -EINVAL;
5605         }
5606         /* Compat-code for transition, will disappear. */
5607         if (!intel_crtc->config.clock_set) {
5608                 intel_crtc->config.dpll.n = clock.n;
5609                 intel_crtc->config.dpll.m1 = clock.m1;
5610                 intel_crtc->config.dpll.m2 = clock.m2;
5611                 intel_crtc->config.dpll.p1 = clock.p1;
5612                 intel_crtc->config.dpll.p2 = clock.p2;
5613         }
5614
5615         /* Ensure that the cursor is valid for the new mode before changing... */
5616         intel_crtc_update_cursor(crtc, true);
5617
5618         /* determine panel color depth */
5619         dither = intel_crtc->config.dither;
5620         if (is_lvds && dev_priv->lvds_dither)
5621                 dither = true;
5622
5623         fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
5624         if (has_reduced_clock)
5625                 fp2 = reduced_clock.n << 16 | reduced_clock.m1 << 8 |
5626                         reduced_clock.m2;
5627
5628         dpll = ironlake_compute_dpll(intel_crtc, &clock, &fp, &reduced_clock,
5629                                      has_reduced_clock ? &fp2 : NULL);
5630
5631         DRM_DEBUG_KMS("Mode for pipe %d:\n", pipe);
5632         drm_mode_debug_printmodeline(mode);
5633
5634         /* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
5635         if (intel_crtc->config.has_pch_encoder) {
5636                 struct intel_pch_pll *pll;
5637
5638                 pll = intel_get_pch_pll(intel_crtc, dpll, fp);
5639                 if (pll == NULL) {
5640                         DRM_DEBUG_DRIVER("failed to find PLL for pipe %d\n",
5641                                          pipe);
5642                         return -EINVAL;
5643                 }
5644         } else
5645                 intel_put_pch_pll(intel_crtc);
5646
5647         if (intel_crtc->config.has_dp_encoder)
5648                 intel_dp_set_m_n(intel_crtc);
5649
5650         for_each_encoder_on_crtc(dev, crtc, encoder)
5651                 if (encoder->pre_pll_enable)
5652                         encoder->pre_pll_enable(encoder);
5653
5654         if (intel_crtc->pch_pll) {
5655                 I915_WRITE(intel_crtc->pch_pll->pll_reg, dpll);
5656
5657                 /* Wait for the clocks to stabilize. */
5658                 POSTING_READ(intel_crtc->pch_pll->pll_reg);
5659                 udelay(150);
5660
5661                 /* The pixel multiplier can only be updated once the
5662                  * DPLL is enabled and the clocks are stable.
5663                  *
5664                  * So write it again.
5665                  */
5666                 I915_WRITE(intel_crtc->pch_pll->pll_reg, dpll);
5667         }
5668
5669         intel_crtc->lowfreq_avail = false;
5670         if (intel_crtc->pch_pll) {
5671                 if (is_lvds && has_reduced_clock && i915_powersave) {
5672                         I915_WRITE(intel_crtc->pch_pll->fp1_reg, fp2);
5673                         intel_crtc->lowfreq_avail = true;
5674                 } else {
5675                         I915_WRITE(intel_crtc->pch_pll->fp1_reg, fp);
5676                 }
5677         }
5678
5679         intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
5680
5681         /* Note, this also computes intel_crtc->fdi_lanes which is used below in
5682          * ironlake_check_fdi_lanes. */
5683         intel_crtc->fdi_lanes = 0;
5684         if (intel_crtc->config.has_pch_encoder)
5685                 ironlake_fdi_set_m_n(crtc);
5686
5687         fdi_config_ok = ironlake_check_fdi_lanes(intel_crtc);
5688
5689         ironlake_set_pipeconf(crtc, adjusted_mode, dither);
5690
5691         intel_wait_for_vblank(dev, pipe);
5692
5693         /* Set up the display plane register */
5694         I915_WRITE(DSPCNTR(plane), DISPPLANE_GAMMA_ENABLE);
5695         POSTING_READ(DSPCNTR(plane));
5696
5697         ret = intel_pipe_set_base(crtc, x, y, fb);
5698
5699         intel_update_watermarks(dev);
5700
5701         intel_update_linetime_watermarks(dev, pipe, adjusted_mode);
5702
5703         return fdi_config_ok ? ret : -EINVAL;
5704 }
5705
5706 static bool ironlake_get_pipe_config(struct intel_crtc *crtc,
5707                                      struct intel_crtc_config *pipe_config)
5708 {
5709         struct drm_device *dev = crtc->base.dev;
5710         struct drm_i915_private *dev_priv = dev->dev_private;
5711         uint32_t tmp;
5712
5713         tmp = I915_READ(PIPECONF(crtc->pipe));
5714         if (!(tmp & PIPECONF_ENABLE))
5715                 return false;
5716
5717         if (I915_READ(TRANSCONF(crtc->pipe)) & TRANS_ENABLE)
5718                 pipe_config->has_pch_encoder = true;
5719
5720         return true;
5721 }
5722
5723 static void haswell_modeset_global_resources(struct drm_device *dev)
5724 {
5725         struct drm_i915_private *dev_priv = dev->dev_private;
5726         bool enable = false;
5727         struct intel_crtc *crtc;
5728         struct intel_encoder *encoder;
5729
5730         list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head) {
5731                 if (crtc->pipe != PIPE_A && crtc->base.enabled)
5732                         enable = true;
5733                 /* XXX: Should check for edp transcoder here, but thanks to init
5734                  * sequence that's not yet available. Just in case desktop eDP
5735                  * on PORT D is possible on haswell, too. */
5736         }
5737
5738         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
5739                             base.head) {
5740                 if (encoder->type != INTEL_OUTPUT_EDP &&
5741                     encoder->connectors_active)
5742                         enable = true;
5743         }
5744
5745         /* Even the eDP panel fitter is outside the always-on well. */
5746         if (dev_priv->pch_pf_size)
5747                 enable = true;
5748
5749         intel_set_power_well(dev, enable);
5750 }
5751
5752 static int haswell_crtc_mode_set(struct drm_crtc *crtc,
5753                                  int x, int y,
5754                                  struct drm_framebuffer *fb)
5755 {
5756         struct drm_device *dev = crtc->dev;
5757         struct drm_i915_private *dev_priv = dev->dev_private;
5758         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5759         struct drm_display_mode *adjusted_mode =
5760                 &intel_crtc->config.adjusted_mode;
5761         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
5762         int pipe = intel_crtc->pipe;
5763         int plane = intel_crtc->plane;
5764         int num_connectors = 0;
5765         bool is_cpu_edp = false;
5766         struct intel_encoder *encoder;
5767         int ret;
5768         bool dither;
5769
5770         for_each_encoder_on_crtc(dev, crtc, encoder) {
5771                 switch (encoder->type) {
5772                 case INTEL_OUTPUT_EDP:
5773                         if (!intel_encoder_is_pch_edp(&encoder->base))
5774                                 is_cpu_edp = true;
5775                         break;
5776                 }
5777
5778                 num_connectors++;
5779         }
5780
5781         if (is_cpu_edp)
5782                 intel_crtc->cpu_transcoder = TRANSCODER_EDP;
5783         else
5784                 intel_crtc->cpu_transcoder = pipe;
5785
5786         /* We are not sure yet this won't happen. */
5787         WARN(!HAS_PCH_LPT(dev), "Unexpected PCH type %d\n",
5788              INTEL_PCH_TYPE(dev));
5789
5790         WARN(num_connectors != 1, "%d connectors attached to pipe %c\n",
5791              num_connectors, pipe_name(pipe));
5792
5793         WARN_ON(I915_READ(PIPECONF(intel_crtc->cpu_transcoder)) &
5794                 (PIPECONF_ENABLE | I965_PIPECONF_ACTIVE));
5795
5796         WARN_ON(I915_READ(DSPCNTR(plane)) & DISPLAY_PLANE_ENABLE);
5797
5798         if (!intel_ddi_pll_mode_set(crtc, adjusted_mode->clock))
5799                 return -EINVAL;
5800
5801         /* Ensure that the cursor is valid for the new mode before changing... */
5802         intel_crtc_update_cursor(crtc, true);
5803
5804         /* determine panel color depth */
5805         dither = intel_crtc->config.dither;
5806
5807         DRM_DEBUG_KMS("Mode for pipe %d:\n", pipe);
5808         drm_mode_debug_printmodeline(mode);
5809
5810         if (intel_crtc->config.has_dp_encoder)
5811                 intel_dp_set_m_n(intel_crtc);
5812
5813         intel_crtc->lowfreq_avail = false;
5814
5815         intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
5816
5817         if (intel_crtc->config.has_pch_encoder)
5818                 ironlake_fdi_set_m_n(crtc);
5819
5820         haswell_set_pipeconf(crtc, adjusted_mode, dither);
5821
5822         intel_set_pipe_csc(crtc);
5823
5824         /* Set up the display plane register */
5825         I915_WRITE(DSPCNTR(plane), DISPPLANE_GAMMA_ENABLE | DISPPLANE_PIPE_CSC_ENABLE);
5826         POSTING_READ(DSPCNTR(plane));
5827
5828         ret = intel_pipe_set_base(crtc, x, y, fb);
5829
5830         intel_update_watermarks(dev);
5831
5832         intel_update_linetime_watermarks(dev, pipe, adjusted_mode);
5833
5834         return ret;
5835 }
5836
5837 static bool haswell_get_pipe_config(struct intel_crtc *crtc,
5838                                     struct intel_crtc_config *pipe_config)
5839 {
5840         struct drm_device *dev = crtc->base.dev;
5841         struct drm_i915_private *dev_priv = dev->dev_private;
5842         uint32_t tmp;
5843
5844         tmp = I915_READ(PIPECONF(crtc->cpu_transcoder));
5845         if (!(tmp & PIPECONF_ENABLE))
5846                 return false;
5847
5848         /*
5849          * aswell has only FDI/PCH transcoder A. It is which is connected to
5850          * DDI E. So just check whether this pipe is wired to DDI E and whether
5851          * the PCH transcoder is on.
5852          */
5853         tmp = I915_READ(TRANS_DDI_FUNC_CTL(crtc->pipe));
5854         if ((tmp & TRANS_DDI_PORT_MASK) == TRANS_DDI_SELECT_PORT(PORT_E) &&
5855             I915_READ(TRANSCONF(PIPE_A)) & TRANS_ENABLE)
5856                 pipe_config->has_pch_encoder = true;
5857
5858
5859         return true;
5860 }
5861
5862 static int intel_crtc_mode_set(struct drm_crtc *crtc,
5863                                int x, int y,
5864                                struct drm_framebuffer *fb)
5865 {
5866         struct drm_device *dev = crtc->dev;
5867         struct drm_i915_private *dev_priv = dev->dev_private;
5868         struct drm_encoder_helper_funcs *encoder_funcs;
5869         struct intel_encoder *encoder;
5870         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5871         struct drm_display_mode *adjusted_mode =
5872                 &intel_crtc->config.adjusted_mode;
5873         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
5874         int pipe = intel_crtc->pipe;
5875         int ret;
5876
5877         drm_vblank_pre_modeset(dev, pipe);
5878
5879         ret = dev_priv->display.crtc_mode_set(crtc, x, y, fb);
5880
5881         drm_vblank_post_modeset(dev, pipe);
5882
5883         if (ret != 0)
5884                 return ret;
5885
5886         for_each_encoder_on_crtc(dev, crtc, encoder) {
5887                 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
5888                         encoder->base.base.id,
5889                         drm_get_encoder_name(&encoder->base),
5890                         mode->base.id, mode->name);
5891                 if (encoder->mode_set) {
5892                         encoder->mode_set(encoder);
5893                 } else {
5894                         encoder_funcs = encoder->base.helper_private;
5895                         encoder_funcs->mode_set(&encoder->base, mode, adjusted_mode);
5896                 }
5897         }
5898
5899         return 0;
5900 }
5901
5902 static bool intel_eld_uptodate(struct drm_connector *connector,
5903                                int reg_eldv, uint32_t bits_eldv,
5904                                int reg_elda, uint32_t bits_elda,
5905                                int reg_edid)
5906 {
5907         struct drm_i915_private *dev_priv = connector->dev->dev_private;
5908         uint8_t *eld = connector->eld;
5909         uint32_t i;
5910
5911         i = I915_READ(reg_eldv);
5912         i &= bits_eldv;
5913
5914         if (!eld[0])
5915                 return !i;
5916
5917         if (!i)
5918                 return false;
5919
5920         i = I915_READ(reg_elda);
5921         i &= ~bits_elda;
5922         I915_WRITE(reg_elda, i);
5923
5924         for (i = 0; i < eld[2]; i++)
5925                 if (I915_READ(reg_edid) != *((uint32_t *)eld + i))
5926                         return false;
5927
5928         return true;
5929 }
5930
5931 static void g4x_write_eld(struct drm_connector *connector,
5932                           struct drm_crtc *crtc)
5933 {
5934         struct drm_i915_private *dev_priv = connector->dev->dev_private;
5935         uint8_t *eld = connector->eld;
5936         uint32_t eldv;
5937         uint32_t len;
5938         uint32_t i;
5939
5940         i = I915_READ(G4X_AUD_VID_DID);
5941
5942         if (i == INTEL_AUDIO_DEVBLC || i == INTEL_AUDIO_DEVCL)
5943                 eldv = G4X_ELDV_DEVCL_DEVBLC;
5944         else
5945                 eldv = G4X_ELDV_DEVCTG;
5946
5947         if (intel_eld_uptodate(connector,
5948                                G4X_AUD_CNTL_ST, eldv,
5949                                G4X_AUD_CNTL_ST, G4X_ELD_ADDR,
5950                                G4X_HDMIW_HDMIEDID))
5951                 return;
5952
5953         i = I915_READ(G4X_AUD_CNTL_ST);
5954         i &= ~(eldv | G4X_ELD_ADDR);
5955         len = (i >> 9) & 0x1f;          /* ELD buffer size */
5956         I915_WRITE(G4X_AUD_CNTL_ST, i);
5957
5958         if (!eld[0])
5959                 return;
5960
5961         len = min_t(uint8_t, eld[2], len);
5962         DRM_DEBUG_DRIVER("ELD size %d\n", len);
5963         for (i = 0; i < len; i++)
5964                 I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i));
5965
5966         i = I915_READ(G4X_AUD_CNTL_ST);
5967         i |= eldv;
5968         I915_WRITE(G4X_AUD_CNTL_ST, i);
5969 }
5970
5971 static void haswell_write_eld(struct drm_connector *connector,
5972                                      struct drm_crtc *crtc)
5973 {
5974         struct drm_i915_private *dev_priv = connector->dev->dev_private;
5975         uint8_t *eld = connector->eld;
5976         struct drm_device *dev = crtc->dev;
5977         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5978         uint32_t eldv;
5979         uint32_t i;
5980         int len;
5981         int pipe = to_intel_crtc(crtc)->pipe;
5982         int tmp;
5983
5984         int hdmiw_hdmiedid = HSW_AUD_EDID_DATA(pipe);
5985         int aud_cntl_st = HSW_AUD_DIP_ELD_CTRL(pipe);
5986         int aud_config = HSW_AUD_CFG(pipe);
5987         int aud_cntrl_st2 = HSW_AUD_PIN_ELD_CP_VLD;
5988
5989
5990         DRM_DEBUG_DRIVER("HDMI: Haswell Audio initialize....\n");
5991
5992         /* Audio output enable */
5993         DRM_DEBUG_DRIVER("HDMI audio: enable codec\n");
5994         tmp = I915_READ(aud_cntrl_st2);
5995         tmp |= (AUDIO_OUTPUT_ENABLE_A << (pipe * 4));
5996         I915_WRITE(aud_cntrl_st2, tmp);
5997
5998         /* Wait for 1 vertical blank */
5999         intel_wait_for_vblank(dev, pipe);
6000
6001         /* Set ELD valid state */
6002         tmp = I915_READ(aud_cntrl_st2);
6003         DRM_DEBUG_DRIVER("HDMI audio: pin eld vld status=0x%8x\n", tmp);
6004         tmp |= (AUDIO_ELD_VALID_A << (pipe * 4));
6005         I915_WRITE(aud_cntrl_st2, tmp);
6006         tmp = I915_READ(aud_cntrl_st2);
6007         DRM_DEBUG_DRIVER("HDMI audio: eld vld status=0x%8x\n", tmp);
6008
6009         /* Enable HDMI mode */
6010         tmp = I915_READ(aud_config);
6011         DRM_DEBUG_DRIVER("HDMI audio: audio conf: 0x%8x\n", tmp);
6012         /* clear N_programing_enable and N_value_index */
6013         tmp &= ~(AUD_CONFIG_N_VALUE_INDEX | AUD_CONFIG_N_PROG_ENABLE);
6014         I915_WRITE(aud_config, tmp);
6015
6016         DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe));
6017
6018         eldv = AUDIO_ELD_VALID_A << (pipe * 4);
6019         intel_crtc->eld_vld = true;
6020
6021         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
6022                 DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");
6023                 eld[5] |= (1 << 2);     /* Conn_Type, 0x1 = DisplayPort */
6024                 I915_WRITE(aud_config, AUD_CONFIG_N_VALUE_INDEX); /* 0x1 = DP */
6025         } else
6026                 I915_WRITE(aud_config, 0);
6027
6028         if (intel_eld_uptodate(connector,
6029                                aud_cntrl_st2, eldv,
6030                                aud_cntl_st, IBX_ELD_ADDRESS,
6031                                hdmiw_hdmiedid))
6032                 return;
6033
6034         i = I915_READ(aud_cntrl_st2);
6035         i &= ~eldv;
6036         I915_WRITE(aud_cntrl_st2, i);
6037
6038         if (!eld[0])
6039                 return;
6040
6041         i = I915_READ(aud_cntl_st);
6042         i &= ~IBX_ELD_ADDRESS;
6043         I915_WRITE(aud_cntl_st, i);
6044         i = (i >> 29) & DIP_PORT_SEL_MASK;              /* DIP_Port_Select, 0x1 = PortB */
6045         DRM_DEBUG_DRIVER("port num:%d\n", i);
6046
6047         len = min_t(uint8_t, eld[2], 21);       /* 84 bytes of hw ELD buffer */
6048         DRM_DEBUG_DRIVER("ELD size %d\n", len);
6049         for (i = 0; i < len; i++)
6050                 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
6051
6052         i = I915_READ(aud_cntrl_st2);
6053         i |= eldv;
6054         I915_WRITE(aud_cntrl_st2, i);
6055
6056 }
6057
6058 static void ironlake_write_eld(struct drm_connector *connector,
6059                                      struct drm_crtc *crtc)
6060 {
6061         struct drm_i915_private *dev_priv = connector->dev->dev_private;
6062         uint8_t *eld = connector->eld;
6063         uint32_t eldv;
6064         uint32_t i;
6065         int len;
6066         int hdmiw_hdmiedid;
6067         int aud_config;
6068         int aud_cntl_st;
6069         int aud_cntrl_st2;
6070         int pipe = to_intel_crtc(crtc)->pipe;
6071
6072         if (HAS_PCH_IBX(connector->dev)) {
6073                 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
6074                 aud_config = IBX_AUD_CFG(pipe);
6075                 aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
6076                 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
6077         } else {
6078                 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
6079                 aud_config = CPT_AUD_CFG(pipe);
6080                 aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
6081                 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
6082         }
6083
6084         DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe));
6085
6086         i = I915_READ(aud_cntl_st);
6087         i = (i >> 29) & DIP_PORT_SEL_MASK;              /* DIP_Port_Select, 0x1 = PortB */
6088         if (!i) {
6089                 DRM_DEBUG_DRIVER("Audio directed to unknown port\n");
6090                 /* operate blindly on all ports */
6091                 eldv = IBX_ELD_VALIDB;
6092                 eldv |= IBX_ELD_VALIDB << 4;
6093                 eldv |= IBX_ELD_VALIDB << 8;
6094         } else {
6095                 DRM_DEBUG_DRIVER("ELD on port %c\n", 'A' + i);
6096                 eldv = IBX_ELD_VALIDB << ((i - 1) * 4);
6097         }
6098
6099         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
6100                 DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");
6101                 eld[5] |= (1 << 2);     /* Conn_Type, 0x1 = DisplayPort */
6102                 I915_WRITE(aud_config, AUD_CONFIG_N_VALUE_INDEX); /* 0x1 = DP */
6103         } else
6104                 I915_WRITE(aud_config, 0);
6105
6106         if (intel_eld_uptodate(connector,
6107                                aud_cntrl_st2, eldv,
6108                                aud_cntl_st, IBX_ELD_ADDRESS,
6109                                hdmiw_hdmiedid))
6110                 return;
6111
6112         i = I915_READ(aud_cntrl_st2);
6113         i &= ~eldv;
6114         I915_WRITE(aud_cntrl_st2, i);
6115
6116         if (!eld[0])
6117                 return;
6118
6119         i = I915_READ(aud_cntl_st);
6120         i &= ~IBX_ELD_ADDRESS;
6121         I915_WRITE(aud_cntl_st, i);
6122
6123         len = min_t(uint8_t, eld[2], 21);       /* 84 bytes of hw ELD buffer */
6124         DRM_DEBUG_DRIVER("ELD size %d\n", len);
6125         for (i = 0; i < len; i++)
6126                 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
6127
6128         i = I915_READ(aud_cntrl_st2);
6129         i |= eldv;
6130         I915_WRITE(aud_cntrl_st2, i);
6131 }
6132
6133 void intel_write_eld(struct drm_encoder *encoder,
6134                      struct drm_display_mode *mode)
6135 {
6136         struct drm_crtc *crtc = encoder->crtc;
6137         struct drm_connector *connector;
6138         struct drm_device *dev = encoder->dev;
6139         struct drm_i915_private *dev_priv = dev->dev_private;
6140
6141         connector = drm_select_eld(encoder, mode);
6142         if (!connector)
6143                 return;
6144
6145         DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6146                          connector->base.id,
6147                          drm_get_connector_name(connector),
6148                          connector->encoder->base.id,
6149                          drm_get_encoder_name(connector->encoder));
6150
6151         connector->eld[6] = drm_av_sync_delay(connector, mode) / 2;
6152
6153         if (dev_priv->display.write_eld)
6154                 dev_priv->display.write_eld(connector, crtc);
6155 }
6156
6157 /** Loads the palette/gamma unit for the CRTC with the prepared values */
6158 void intel_crtc_load_lut(struct drm_crtc *crtc)
6159 {
6160         struct drm_device *dev = crtc->dev;
6161         struct drm_i915_private *dev_priv = dev->dev_private;
6162         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6163         int palreg = PALETTE(intel_crtc->pipe);
6164         int i;
6165
6166         /* The clocks have to be on to load the palette. */
6167         if (!crtc->enabled || !intel_crtc->active)
6168                 return;
6169
6170         /* use legacy palette for Ironlake */
6171         if (HAS_PCH_SPLIT(dev))
6172                 palreg = LGC_PALETTE(intel_crtc->pipe);
6173
6174         for (i = 0; i < 256; i++) {
6175                 I915_WRITE(palreg + 4 * i,
6176                            (intel_crtc->lut_r[i] << 16) |
6177                            (intel_crtc->lut_g[i] << 8) |
6178                            intel_crtc->lut_b[i]);
6179         }
6180 }
6181
6182 static void i845_update_cursor(struct drm_crtc *crtc, u32 base)
6183 {
6184         struct drm_device *dev = crtc->dev;
6185         struct drm_i915_private *dev_priv = dev->dev_private;
6186         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6187         bool visible = base != 0;
6188         u32 cntl;
6189
6190         if (intel_crtc->cursor_visible == visible)
6191                 return;
6192
6193         cntl = I915_READ(_CURACNTR);
6194         if (visible) {
6195                 /* On these chipsets we can only modify the base whilst
6196                  * the cursor is disabled.
6197                  */
6198                 I915_WRITE(_CURABASE, base);
6199
6200                 cntl &= ~(CURSOR_FORMAT_MASK);
6201                 /* XXX width must be 64, stride 256 => 0x00 << 28 */
6202                 cntl |= CURSOR_ENABLE |
6203                         CURSOR_GAMMA_ENABLE |
6204                         CURSOR_FORMAT_ARGB;
6205         } else
6206                 cntl &= ~(CURSOR_ENABLE | CURSOR_GAMMA_ENABLE);
6207         I915_WRITE(_CURACNTR, cntl);
6208
6209         intel_crtc->cursor_visible = visible;
6210 }
6211
6212 static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
6213 {
6214         struct drm_device *dev = crtc->dev;
6215         struct drm_i915_private *dev_priv = dev->dev_private;
6216         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6217         int pipe = intel_crtc->pipe;
6218         bool visible = base != 0;
6219
6220         if (intel_crtc->cursor_visible != visible) {
6221                 uint32_t cntl = I915_READ(CURCNTR(pipe));
6222                 if (base) {
6223                         cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
6224                         cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
6225                         cntl |= pipe << 28; /* Connect to correct pipe */
6226                 } else {
6227                         cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
6228                         cntl |= CURSOR_MODE_DISABLE;
6229                 }
6230                 I915_WRITE(CURCNTR(pipe), cntl);
6231
6232                 intel_crtc->cursor_visible = visible;
6233         }
6234         /* and commit changes on next vblank */
6235         I915_WRITE(CURBASE(pipe), base);
6236 }
6237
6238 static void ivb_update_cursor(struct drm_crtc *crtc, u32 base)
6239 {
6240         struct drm_device *dev = crtc->dev;
6241         struct drm_i915_private *dev_priv = dev->dev_private;
6242         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6243         int pipe = intel_crtc->pipe;
6244         bool visible = base != 0;
6245
6246         if (intel_crtc->cursor_visible != visible) {
6247                 uint32_t cntl = I915_READ(CURCNTR_IVB(pipe));
6248                 if (base) {
6249                         cntl &= ~CURSOR_MODE;
6250                         cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
6251                 } else {
6252                         cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
6253                         cntl |= CURSOR_MODE_DISABLE;
6254                 }
6255                 if (IS_HASWELL(dev))
6256                         cntl |= CURSOR_PIPE_CSC_ENABLE;
6257                 I915_WRITE(CURCNTR_IVB(pipe), cntl);
6258
6259                 intel_crtc->cursor_visible = visible;
6260         }
6261         /* and commit changes on next vblank */
6262         I915_WRITE(CURBASE_IVB(pipe), base);
6263 }
6264
6265 /* If no-part of the cursor is visible on the framebuffer, then the GPU may hang... */
6266 static void intel_crtc_update_cursor(struct drm_crtc *crtc,
6267                                      bool on)
6268 {
6269         struct drm_device *dev = crtc->dev;
6270         struct drm_i915_private *dev_priv = dev->dev_private;
6271         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6272         int pipe = intel_crtc->pipe;
6273         int x = intel_crtc->cursor_x;
6274         int y = intel_crtc->cursor_y;
6275         u32 base, pos;
6276         bool visible;
6277
6278         pos = 0;
6279
6280         if (on && crtc->enabled && crtc->fb) {
6281                 base = intel_crtc->cursor_addr;
6282                 if (x > (int) crtc->fb->width)
6283                         base = 0;
6284
6285                 if (y > (int) crtc->fb->height)
6286                         base = 0;
6287         } else
6288                 base = 0;
6289
6290         if (x < 0) {
6291                 if (x + intel_crtc->cursor_width < 0)
6292                         base = 0;
6293
6294                 pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
6295                 x = -x;
6296         }
6297         pos |= x << CURSOR_X_SHIFT;
6298
6299         if (y < 0) {
6300                 if (y + intel_crtc->cursor_height < 0)
6301                         base = 0;
6302
6303                 pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;
6304                 y = -y;
6305         }
6306         pos |= y << CURSOR_Y_SHIFT;
6307
6308         visible = base != 0;
6309         if (!visible && !intel_crtc->cursor_visible)
6310                 return;
6311
6312         if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
6313                 I915_WRITE(CURPOS_IVB(pipe), pos);
6314                 ivb_update_cursor(crtc, base);
6315         } else {
6316                 I915_WRITE(CURPOS(pipe), pos);
6317                 if (IS_845G(dev) || IS_I865G(dev))
6318                         i845_update_cursor(crtc, base);
6319                 else
6320                         i9xx_update_cursor(crtc, base);
6321         }
6322 }
6323
6324 static int intel_crtc_cursor_set(struct drm_crtc *crtc,
6325                                  struct drm_file *file,
6326                                  uint32_t handle,
6327                                  uint32_t width, uint32_t height)
6328 {
6329         struct drm_device *dev = crtc->dev;
6330         struct drm_i915_private *dev_priv = dev->dev_private;
6331         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6332         struct drm_i915_gem_object *obj;
6333         uint32_t addr;
6334         int ret;
6335
6336         /* if we want to turn off the cursor ignore width and height */
6337         if (!handle) {
6338                 DRM_DEBUG_KMS("cursor off\n");
6339                 addr = 0;
6340                 obj = NULL;
6341                 mutex_lock(&dev->struct_mutex);
6342                 goto finish;
6343         }
6344
6345         /* Currently we only support 64x64 cursors */
6346         if (width != 64 || height != 64) {
6347                 DRM_ERROR("we currently only support 64x64 cursors\n");
6348                 return -EINVAL;
6349         }
6350
6351         obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
6352         if (&obj->base == NULL)
6353                 return -ENOENT;
6354
6355         if (obj->base.size < width * height * 4) {
6356                 DRM_ERROR("buffer is to small\n");
6357                 ret = -ENOMEM;
6358                 goto fail;
6359         }
6360
6361         /* we only need to pin inside GTT if cursor is non-phy */
6362         mutex_lock(&dev->struct_mutex);
6363         if (!dev_priv->info->cursor_needs_physical) {
6364                 unsigned alignment;
6365
6366                 if (obj->tiling_mode) {
6367                         DRM_ERROR("cursor cannot be tiled\n");
6368                         ret = -EINVAL;
6369                         goto fail_locked;
6370                 }
6371
6372                 /* Note that the w/a also requires 2 PTE of padding following
6373                  * the bo. We currently fill all unused PTE with the shadow
6374                  * page and so we should always have valid PTE following the
6375                  * cursor preventing the VT-d warning.
6376                  */
6377                 alignment = 0;
6378                 if (need_vtd_wa(dev))
6379                         alignment = 64*1024;
6380
6381                 ret = i915_gem_object_pin_to_display_plane(obj, alignment, NULL);
6382                 if (ret) {
6383                         DRM_ERROR("failed to move cursor bo into the GTT\n");
6384                         goto fail_locked;
6385                 }
6386
6387                 ret = i915_gem_object_put_fence(obj);
6388                 if (ret) {
6389                         DRM_ERROR("failed to release fence for cursor");
6390                         goto fail_unpin;
6391                 }
6392
6393                 addr = obj->gtt_offset;
6394         } else {
6395                 int align = IS_I830(dev) ? 16 * 1024 : 256;
6396                 ret = i915_gem_attach_phys_object(dev, obj,
6397                                                   (intel_crtc->pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1,
6398                                                   align);
6399                 if (ret) {
6400                         DRM_ERROR("failed to attach phys object\n");
6401                         goto fail_locked;
6402                 }
6403                 addr = obj->phys_obj->handle->busaddr;
6404         }
6405
6406         if (IS_GEN2(dev))
6407                 I915_WRITE(CURSIZE, (height << 12) | width);
6408
6409  finish:
6410         if (intel_crtc->cursor_bo) {
6411                 if (dev_priv->info->cursor_needs_physical) {
6412                         if (intel_crtc->cursor_bo != obj)
6413                                 i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
6414                 } else
6415                         i915_gem_object_unpin(intel_crtc->cursor_bo);
6416                 drm_gem_object_unreference(&intel_crtc->cursor_bo->base);
6417         }
6418
6419         mutex_unlock(&dev->struct_mutex);
6420
6421         intel_crtc->cursor_addr = addr;
6422         intel_crtc->cursor_bo = obj;
6423         intel_crtc->cursor_width = width;
6424         intel_crtc->cursor_height = height;
6425
6426         intel_crtc_update_cursor(crtc, true);
6427
6428         return 0;
6429 fail_unpin:
6430         i915_gem_object_unpin(obj);
6431 fail_locked:
6432         mutex_unlock(&dev->struct_mutex);
6433 fail:
6434         drm_gem_object_unreference_unlocked(&obj->base);
6435         return ret;
6436 }
6437
6438 static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
6439 {
6440         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6441
6442         intel_crtc->cursor_x = x;
6443         intel_crtc->cursor_y = y;
6444
6445         intel_crtc_update_cursor(crtc, true);
6446
6447         return 0;
6448 }
6449
6450 /** Sets the color ramps on behalf of RandR */
6451 void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
6452                                  u16 blue, int regno)
6453 {
6454         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6455
6456         intel_crtc->lut_r[regno] = red >> 8;
6457         intel_crtc->lut_g[regno] = green >> 8;
6458         intel_crtc->lut_b[regno] = blue >> 8;
6459 }
6460
6461 void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
6462                              u16 *blue, int regno)
6463 {
6464         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6465
6466         *red = intel_crtc->lut_r[regno] << 8;
6467         *green = intel_crtc->lut_g[regno] << 8;
6468         *blue = intel_crtc->lut_b[regno] << 8;
6469 }
6470
6471 static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
6472                                  u16 *blue, uint32_t start, uint32_t size)
6473 {
6474         int end = (start + size > 256) ? 256 : start + size, i;
6475         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6476
6477         for (i = start; i < end; i++) {
6478                 intel_crtc->lut_r[i] = red[i] >> 8;
6479                 intel_crtc->lut_g[i] = green[i] >> 8;
6480                 intel_crtc->lut_b[i] = blue[i] >> 8;
6481         }
6482
6483         intel_crtc_load_lut(crtc);
6484 }
6485
6486 /* VESA 640x480x72Hz mode to set on the pipe */
6487 static struct drm_display_mode load_detect_mode = {
6488         DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
6489                  704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
6490 };
6491
6492 static struct drm_framebuffer *
6493 intel_framebuffer_create(struct drm_device *dev,
6494                          struct drm_mode_fb_cmd2 *mode_cmd,
6495                          struct drm_i915_gem_object *obj)
6496 {
6497         struct intel_framebuffer *intel_fb;
6498         int ret;
6499
6500         intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
6501         if (!intel_fb) {
6502                 drm_gem_object_unreference_unlocked(&obj->base);
6503                 return ERR_PTR(-ENOMEM);
6504         }
6505
6506         ret = intel_framebuffer_init(dev, intel_fb, mode_cmd, obj);
6507         if (ret) {
6508                 drm_gem_object_unreference_unlocked(&obj->base);
6509                 kfree(intel_fb);
6510                 return ERR_PTR(ret);
6511         }
6512
6513         return &intel_fb->base;
6514 }
6515
6516 static u32
6517 intel_framebuffer_pitch_for_width(int width, int bpp)
6518 {
6519         u32 pitch = DIV_ROUND_UP(width * bpp, 8);
6520         return ALIGN(pitch, 64);
6521 }
6522
6523 static u32
6524 intel_framebuffer_size_for_mode(struct drm_display_mode *mode, int bpp)
6525 {
6526         u32 pitch = intel_framebuffer_pitch_for_width(mode->hdisplay, bpp);
6527         return ALIGN(pitch * mode->vdisplay, PAGE_SIZE);
6528 }
6529
6530 static struct drm_framebuffer *
6531 intel_framebuffer_create_for_mode(struct drm_device *dev,
6532                                   struct drm_display_mode *mode,
6533                                   int depth, int bpp)
6534 {
6535         struct drm_i915_gem_object *obj;
6536         struct drm_mode_fb_cmd2 mode_cmd = { 0 };
6537
6538         obj = i915_gem_alloc_object(dev,
6539                                     intel_framebuffer_size_for_mode(mode, bpp));
6540         if (obj == NULL)
6541                 return ERR_PTR(-ENOMEM);
6542
6543         mode_cmd.width = mode->hdisplay;
6544         mode_cmd.height = mode->vdisplay;
6545         mode_cmd.pitches[0] = intel_framebuffer_pitch_for_width(mode_cmd.width,
6546                                                                 bpp);
6547         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
6548
6549         return intel_framebuffer_create(dev, &mode_cmd, obj);
6550 }
6551
6552 static struct drm_framebuffer *
6553 mode_fits_in_fbdev(struct drm_device *dev,
6554                    struct drm_display_mode *mode)
6555 {
6556         struct drm_i915_private *dev_priv = dev->dev_private;
6557         struct drm_i915_gem_object *obj;
6558         struct drm_framebuffer *fb;
6559
6560         if (dev_priv->fbdev == NULL)
6561                 return NULL;
6562
6563         obj = dev_priv->fbdev->ifb.obj;
6564         if (obj == NULL)
6565                 return NULL;
6566
6567         fb = &dev_priv->fbdev->ifb.base;
6568         if (fb->pitches[0] < intel_framebuffer_pitch_for_width(mode->hdisplay,
6569                                                                fb->bits_per_pixel))
6570                 return NULL;
6571
6572         if (obj->base.size < mode->vdisplay * fb->pitches[0])
6573                 return NULL;
6574
6575         return fb;
6576 }
6577
6578 bool intel_get_load_detect_pipe(struct drm_connector *connector,
6579                                 struct drm_display_mode *mode,
6580                                 struct intel_load_detect_pipe *old)
6581 {
6582         struct intel_crtc *intel_crtc;
6583         struct intel_encoder *intel_encoder =
6584                 intel_attached_encoder(connector);
6585         struct drm_crtc *possible_crtc;
6586         struct drm_encoder *encoder = &intel_encoder->base;
6587         struct drm_crtc *crtc = NULL;
6588         struct drm_device *dev = encoder->dev;
6589         struct drm_framebuffer *fb;
6590         int i = -1;
6591
6592         DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6593                       connector->base.id, drm_get_connector_name(connector),
6594                       encoder->base.id, drm_get_encoder_name(encoder));
6595
6596         /*
6597          * Algorithm gets a little messy:
6598          *
6599          *   - if the connector already has an assigned crtc, use it (but make
6600          *     sure it's on first)
6601          *
6602          *   - try to find the first unused crtc that can drive this connector,
6603          *     and use that if we find one
6604          */
6605
6606         /* See if we already have a CRTC for this connector */
6607         if (encoder->crtc) {
6608                 crtc = encoder->crtc;
6609
6610                 mutex_lock(&crtc->mutex);
6611
6612                 old->dpms_mode = connector->dpms;
6613                 old->load_detect_temp = false;
6614
6615                 /* Make sure the crtc and connector are running */
6616                 if (connector->dpms != DRM_MODE_DPMS_ON)
6617                         connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
6618
6619                 return true;
6620         }
6621
6622         /* Find an unused one (if possible) */
6623         list_for_each_entry(possible_crtc, &dev->mode_config.crtc_list, head) {
6624                 i++;
6625                 if (!(encoder->possible_crtcs & (1 << i)))
6626                         continue;
6627                 if (!possible_crtc->enabled) {
6628                         crtc = possible_crtc;
6629                         break;
6630                 }
6631         }
6632
6633         /*
6634          * If we didn't find an unused CRTC, don't use any.
6635          */
6636         if (!crtc) {
6637                 DRM_DEBUG_KMS("no pipe available for load-detect\n");
6638                 return false;
6639         }
6640
6641         mutex_lock(&crtc->mutex);
6642         intel_encoder->new_crtc = to_intel_crtc(crtc);
6643         to_intel_connector(connector)->new_encoder = intel_encoder;
6644
6645         intel_crtc = to_intel_crtc(crtc);
6646         old->dpms_mode = connector->dpms;
6647         old->load_detect_temp = true;
6648         old->release_fb = NULL;
6649
6650         if (!mode)
6651                 mode = &load_detect_mode;
6652
6653         /* We need a framebuffer large enough to accommodate all accesses
6654          * that the plane may generate whilst we perform load detection.
6655          * We can not rely on the fbcon either being present (we get called
6656          * during its initialisation to detect all boot displays, or it may
6657          * not even exist) or that it is large enough to satisfy the
6658          * requested mode.
6659          */
6660         fb = mode_fits_in_fbdev(dev, mode);
6661         if (fb == NULL) {
6662                 DRM_DEBUG_KMS("creating tmp fb for load-detection\n");
6663                 fb = intel_framebuffer_create_for_mode(dev, mode, 24, 32);
6664                 old->release_fb = fb;
6665         } else
6666                 DRM_DEBUG_KMS("reusing fbdev for load-detection framebuffer\n");
6667         if (IS_ERR(fb)) {
6668                 DRM_DEBUG_KMS("failed to allocate framebuffer for load-detection\n");
6669                 mutex_unlock(&crtc->mutex);
6670                 return false;
6671         }
6672
6673         if (intel_set_mode(crtc, mode, 0, 0, fb)) {
6674                 DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
6675                 if (old->release_fb)
6676                         old->release_fb->funcs->destroy(old->release_fb);
6677                 mutex_unlock(&crtc->mutex);
6678                 return false;
6679         }
6680
6681         /* let the connector get through one full cycle before testing */
6682         intel_wait_for_vblank(dev, intel_crtc->pipe);
6683         return true;
6684 }
6685
6686 void intel_release_load_detect_pipe(struct drm_connector *connector,
6687                                     struct intel_load_detect_pipe *old)
6688 {
6689         struct intel_encoder *intel_encoder =
6690                 intel_attached_encoder(connector);
6691         struct drm_encoder *encoder = &intel_encoder->base;
6692         struct drm_crtc *crtc = encoder->crtc;
6693
6694         DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6695                       connector->base.id, drm_get_connector_name(connector),
6696                       encoder->base.id, drm_get_encoder_name(encoder));
6697
6698         if (old->load_detect_temp) {
6699                 to_intel_connector(connector)->new_encoder = NULL;
6700                 intel_encoder->new_crtc = NULL;
6701                 intel_set_mode(crtc, NULL, 0, 0, NULL);
6702
6703                 if (old->release_fb) {
6704                         drm_framebuffer_unregister_private(old->release_fb);
6705                         drm_framebuffer_unreference(old->release_fb);
6706                 }
6707
6708                 mutex_unlock(&crtc->mutex);
6709                 return;
6710         }
6711
6712         /* Switch crtc and encoder back off if necessary */
6713         if (old->dpms_mode != DRM_MODE_DPMS_ON)
6714                 connector->funcs->dpms(connector, old->dpms_mode);
6715
6716         mutex_unlock(&crtc->mutex);
6717 }
6718
6719 /* Returns the clock of the currently programmed mode of the given pipe. */
6720 static int intel_crtc_clock_get(struct drm_device *dev, struct drm_crtc *crtc)
6721 {
6722         struct drm_i915_private *dev_priv = dev->dev_private;
6723         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6724         int pipe = intel_crtc->pipe;
6725         u32 dpll = I915_READ(DPLL(pipe));
6726         u32 fp;
6727         intel_clock_t clock;
6728
6729         if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
6730                 fp = I915_READ(FP0(pipe));
6731         else
6732                 fp = I915_READ(FP1(pipe));
6733
6734         clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
6735         if (IS_PINEVIEW(dev)) {
6736                 clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
6737                 clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
6738         } else {
6739                 clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
6740                 clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
6741         }
6742
6743         if (!IS_GEN2(dev)) {
6744                 if (IS_PINEVIEW(dev))
6745                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
6746                                 DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
6747                 else
6748                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
6749                                DPLL_FPA01_P1_POST_DIV_SHIFT);
6750
6751                 switch (dpll & DPLL_MODE_MASK) {
6752                 case DPLLB_MODE_DAC_SERIAL:
6753                         clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
6754                                 5 : 10;
6755                         break;
6756                 case DPLLB_MODE_LVDS:
6757                         clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
6758                                 7 : 14;
6759                         break;
6760                 default:
6761                         DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
6762                                   "mode\n", (int)(dpll & DPLL_MODE_MASK));
6763                         return 0;
6764                 }
6765
6766                 /* XXX: Handle the 100Mhz refclk */
6767                 intel_clock(dev, 96000, &clock);
6768         } else {
6769                 bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
6770
6771                 if (is_lvds) {
6772                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
6773                                        DPLL_FPA01_P1_POST_DIV_SHIFT);
6774                         clock.p2 = 14;
6775
6776                         if ((dpll & PLL_REF_INPUT_MASK) ==
6777                             PLLB_REF_INPUT_SPREADSPECTRUMIN) {
6778                                 /* XXX: might not be 66MHz */
6779                                 intel_clock(dev, 66000, &clock);
6780                         } else
6781                                 intel_clock(dev, 48000, &clock);
6782                 } else {
6783                         if (dpll & PLL_P1_DIVIDE_BY_TWO)
6784                                 clock.p1 = 2;
6785                         else {
6786                                 clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
6787                                             DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
6788                         }
6789                         if (dpll & PLL_P2_DIVIDE_BY_4)
6790                                 clock.p2 = 4;
6791                         else
6792                                 clock.p2 = 2;
6793
6794                         intel_clock(dev, 48000, &clock);
6795                 }
6796         }
6797
6798         /* XXX: It would be nice to validate the clocks, but we can't reuse
6799          * i830PllIsValid() because it relies on the xf86_config connector
6800          * configuration being accurate, which it isn't necessarily.
6801          */
6802
6803         return clock.dot;
6804 }
6805
6806 /** Returns the currently programmed mode of the given pipe. */
6807 struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
6808                                              struct drm_crtc *crtc)
6809 {
6810         struct drm_i915_private *dev_priv = dev->dev_private;
6811         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6812         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
6813         struct drm_display_mode *mode;
6814         int htot = I915_READ(HTOTAL(cpu_transcoder));
6815         int hsync = I915_READ(HSYNC(cpu_transcoder));
6816         int vtot = I915_READ(VTOTAL(cpu_transcoder));
6817         int vsync = I915_READ(VSYNC(cpu_transcoder));
6818
6819         mode = kzalloc(sizeof(*mode), GFP_KERNEL);
6820         if (!mode)
6821                 return NULL;
6822
6823         mode->clock = intel_crtc_clock_get(dev, crtc);
6824         mode->hdisplay = (htot & 0xffff) + 1;
6825         mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
6826         mode->hsync_start = (hsync & 0xffff) + 1;
6827         mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
6828         mode->vdisplay = (vtot & 0xffff) + 1;
6829         mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
6830         mode->vsync_start = (vsync & 0xffff) + 1;
6831         mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
6832
6833         drm_mode_set_name(mode);
6834
6835         return mode;
6836 }
6837
6838 static void intel_increase_pllclock(struct drm_crtc *crtc)
6839 {
6840         struct drm_device *dev = crtc->dev;
6841         drm_i915_private_t *dev_priv = dev->dev_private;
6842         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6843         int pipe = intel_crtc->pipe;
6844         int dpll_reg = DPLL(pipe);
6845         int dpll;
6846
6847         if (HAS_PCH_SPLIT(dev))
6848                 return;
6849
6850         if (!dev_priv->lvds_downclock_avail)
6851                 return;
6852
6853         dpll = I915_READ(dpll_reg);
6854         if (!HAS_PIPE_CXSR(dev) && (dpll & DISPLAY_RATE_SELECT_FPA1)) {
6855                 DRM_DEBUG_DRIVER("upclocking LVDS\n");
6856
6857                 assert_panel_unlocked(dev_priv, pipe);
6858
6859                 dpll &= ~DISPLAY_RATE_SELECT_FPA1;
6860                 I915_WRITE(dpll_reg, dpll);
6861                 intel_wait_for_vblank(dev, pipe);
6862
6863                 dpll = I915_READ(dpll_reg);
6864                 if (dpll & DISPLAY_RATE_SELECT_FPA1)
6865                         DRM_DEBUG_DRIVER("failed to upclock LVDS!\n");
6866         }
6867 }
6868
6869 static void intel_decrease_pllclock(struct drm_crtc *crtc)
6870 {
6871         struct drm_device *dev = crtc->dev;
6872         drm_i915_private_t *dev_priv = dev->dev_private;
6873         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6874
6875         if (HAS_PCH_SPLIT(dev))
6876                 return;
6877
6878         if (!dev_priv->lvds_downclock_avail)
6879                 return;
6880
6881         /*
6882          * Since this is called by a timer, we should never get here in
6883          * the manual case.
6884          */
6885         if (!HAS_PIPE_CXSR(dev) && intel_crtc->lowfreq_avail) {
6886                 int pipe = intel_crtc->pipe;
6887                 int dpll_reg = DPLL(pipe);
6888                 int dpll;
6889
6890                 DRM_DEBUG_DRIVER("downclocking LVDS\n");
6891
6892                 assert_panel_unlocked(dev_priv, pipe);
6893
6894                 dpll = I915_READ(dpll_reg);
6895                 dpll |= DISPLAY_RATE_SELECT_FPA1;
6896                 I915_WRITE(dpll_reg, dpll);
6897                 intel_wait_for_vblank(dev, pipe);
6898                 dpll = I915_READ(dpll_reg);
6899                 if (!(dpll & DISPLAY_RATE_SELECT_FPA1))
6900                         DRM_DEBUG_DRIVER("failed to downclock LVDS!\n");
6901         }
6902
6903 }
6904
6905 void intel_mark_busy(struct drm_device *dev)
6906 {
6907         i915_update_gfx_val(dev->dev_private);
6908 }
6909
6910 void intel_mark_idle(struct drm_device *dev)
6911 {
6912         struct drm_crtc *crtc;
6913
6914         if (!i915_powersave)
6915                 return;
6916
6917         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6918                 if (!crtc->fb)
6919                         continue;
6920
6921                 intel_decrease_pllclock(crtc);
6922         }
6923 }
6924
6925 void intel_mark_fb_busy(struct drm_i915_gem_object *obj)
6926 {
6927         struct drm_device *dev = obj->base.dev;
6928         struct drm_crtc *crtc;
6929
6930         if (!i915_powersave)
6931                 return;
6932
6933         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6934                 if (!crtc->fb)
6935                         continue;
6936
6937                 if (to_intel_framebuffer(crtc->fb)->obj == obj)
6938                         intel_increase_pllclock(crtc);
6939         }
6940 }
6941
6942 static void intel_crtc_destroy(struct drm_crtc *crtc)
6943 {
6944         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6945         struct drm_device *dev = crtc->dev;
6946         struct intel_unpin_work *work;
6947         unsigned long flags;
6948
6949         spin_lock_irqsave(&dev->event_lock, flags);
6950         work = intel_crtc->unpin_work;
6951         intel_crtc->unpin_work = NULL;
6952         spin_unlock_irqrestore(&dev->event_lock, flags);
6953
6954         if (work) {
6955                 cancel_work_sync(&work->work);
6956                 kfree(work);
6957         }
6958
6959         drm_crtc_cleanup(crtc);
6960
6961         kfree(intel_crtc);
6962 }
6963
6964 static void intel_unpin_work_fn(struct work_struct *__work)
6965 {
6966         struct intel_unpin_work *work =
6967                 container_of(__work, struct intel_unpin_work, work);
6968         struct drm_device *dev = work->crtc->dev;
6969
6970         mutex_lock(&dev->struct_mutex);
6971         intel_unpin_fb_obj(work->old_fb_obj);
6972         drm_gem_object_unreference(&work->pending_flip_obj->base);
6973         drm_gem_object_unreference(&work->old_fb_obj->base);
6974
6975         intel_update_fbc(dev);
6976         mutex_unlock(&dev->struct_mutex);
6977
6978         BUG_ON(atomic_read(&to_intel_crtc(work->crtc)->unpin_work_count) == 0);
6979         atomic_dec(&to_intel_crtc(work->crtc)->unpin_work_count);
6980
6981         kfree(work);
6982 }
6983
6984 static void do_intel_finish_page_flip(struct drm_device *dev,
6985                                       struct drm_crtc *crtc)
6986 {
6987         drm_i915_private_t *dev_priv = dev->dev_private;
6988         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6989         struct intel_unpin_work *work;
6990         unsigned long flags;
6991
6992         /* Ignore early vblank irqs */
6993         if (intel_crtc == NULL)
6994                 return;
6995
6996         spin_lock_irqsave(&dev->event_lock, flags);
6997         work = intel_crtc->unpin_work;
6998
6999         /* Ensure we don't miss a work->pending update ... */
7000         smp_rmb();
7001
7002         if (work == NULL || atomic_read(&work->pending) < INTEL_FLIP_COMPLETE) {
7003                 spin_unlock_irqrestore(&dev->event_lock, flags);
7004                 return;
7005         }
7006
7007         /* and that the unpin work is consistent wrt ->pending. */
7008         smp_rmb();
7009
7010         intel_crtc->unpin_work = NULL;
7011
7012         if (work->event)
7013                 drm_send_vblank_event(dev, intel_crtc->pipe, work->event);
7014
7015         drm_vblank_put(dev, intel_crtc->pipe);
7016
7017         spin_unlock_irqrestore(&dev->event_lock, flags);
7018
7019         wake_up_all(&dev_priv->pending_flip_queue);
7020
7021         queue_work(dev_priv->wq, &work->work);
7022
7023         trace_i915_flip_complete(intel_crtc->plane, work->pending_flip_obj);
7024 }
7025
7026 void intel_finish_page_flip(struct drm_device *dev, int pipe)
7027 {
7028         drm_i915_private_t *dev_priv = dev->dev_private;
7029         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
7030
7031         do_intel_finish_page_flip(dev, crtc);
7032 }
7033
7034 void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
7035 {
7036         drm_i915_private_t *dev_priv = dev->dev_private;
7037         struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane];
7038
7039         do_intel_finish_page_flip(dev, crtc);
7040 }
7041
7042 void intel_prepare_page_flip(struct drm_device *dev, int plane)
7043 {
7044         drm_i915_private_t *dev_priv = dev->dev_private;
7045         struct intel_crtc *intel_crtc =
7046                 to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]);
7047         unsigned long flags;
7048
7049         /* NB: An MMIO update of the plane base pointer will also
7050          * generate a page-flip completion irq, i.e. every modeset
7051          * is also accompanied by a spurious intel_prepare_page_flip().
7052          */
7053         spin_lock_irqsave(&dev->event_lock, flags);
7054         if (intel_crtc->unpin_work)
7055                 atomic_inc_not_zero(&intel_crtc->unpin_work->pending);
7056         spin_unlock_irqrestore(&dev->event_lock, flags);
7057 }
7058
7059 inline static void intel_mark_page_flip_active(struct intel_crtc *intel_crtc)
7060 {
7061         /* Ensure that the work item is consistent when activating it ... */
7062         smp_wmb();
7063         atomic_set(&intel_crtc->unpin_work->pending, INTEL_FLIP_PENDING);
7064         /* and that it is marked active as soon as the irq could fire. */
7065         smp_wmb();
7066 }
7067
7068 static int intel_gen2_queue_flip(struct drm_device *dev,
7069                                  struct drm_crtc *crtc,
7070                                  struct drm_framebuffer *fb,
7071                                  struct drm_i915_gem_object *obj)
7072 {
7073         struct drm_i915_private *dev_priv = dev->dev_private;
7074         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7075         u32 flip_mask;
7076         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7077         int ret;
7078
7079         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7080         if (ret)
7081                 goto err;
7082
7083         ret = intel_ring_begin(ring, 6);
7084         if (ret)
7085                 goto err_unpin;
7086
7087         /* Can't queue multiple flips, so wait for the previous
7088          * one to finish before executing the next.
7089          */
7090         if (intel_crtc->plane)
7091                 flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
7092         else
7093                 flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
7094         intel_ring_emit(ring, MI_WAIT_FOR_EVENT | flip_mask);
7095         intel_ring_emit(ring, MI_NOOP);
7096         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7097                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7098         intel_ring_emit(ring, fb->pitches[0]);
7099         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7100         intel_ring_emit(ring, 0); /* aux display base address, unused */
7101
7102         intel_mark_page_flip_active(intel_crtc);
7103         intel_ring_advance(ring);
7104         return 0;
7105
7106 err_unpin:
7107         intel_unpin_fb_obj(obj);
7108 err:
7109         return ret;
7110 }
7111
7112 static int intel_gen3_queue_flip(struct drm_device *dev,
7113                                  struct drm_crtc *crtc,
7114                                  struct drm_framebuffer *fb,
7115                                  struct drm_i915_gem_object *obj)
7116 {
7117         struct drm_i915_private *dev_priv = dev->dev_private;
7118         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7119         u32 flip_mask;
7120         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7121         int ret;
7122
7123         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7124         if (ret)
7125                 goto err;
7126
7127         ret = intel_ring_begin(ring, 6);
7128         if (ret)
7129                 goto err_unpin;
7130
7131         if (intel_crtc->plane)
7132                 flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
7133         else
7134                 flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
7135         intel_ring_emit(ring, MI_WAIT_FOR_EVENT | flip_mask);
7136         intel_ring_emit(ring, MI_NOOP);
7137         intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 |
7138                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7139         intel_ring_emit(ring, fb->pitches[0]);
7140         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7141         intel_ring_emit(ring, MI_NOOP);
7142
7143         intel_mark_page_flip_active(intel_crtc);
7144         intel_ring_advance(ring);
7145         return 0;
7146
7147 err_unpin:
7148         intel_unpin_fb_obj(obj);
7149 err:
7150         return ret;
7151 }
7152
7153 static int intel_gen4_queue_flip(struct drm_device *dev,
7154                                  struct drm_crtc *crtc,
7155                                  struct drm_framebuffer *fb,
7156                                  struct drm_i915_gem_object *obj)
7157 {
7158         struct drm_i915_private *dev_priv = dev->dev_private;
7159         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7160         uint32_t pf, pipesrc;
7161         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7162         int ret;
7163
7164         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7165         if (ret)
7166                 goto err;
7167
7168         ret = intel_ring_begin(ring, 4);
7169         if (ret)
7170                 goto err_unpin;
7171
7172         /* i965+ uses the linear or tiled offsets from the
7173          * Display Registers (which do not change across a page-flip)
7174          * so we need only reprogram the base address.
7175          */
7176         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7177                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7178         intel_ring_emit(ring, fb->pitches[0]);
7179         intel_ring_emit(ring,
7180                         (obj->gtt_offset + intel_crtc->dspaddr_offset) |
7181                         obj->tiling_mode);
7182
7183         /* XXX Enabling the panel-fitter across page-flip is so far
7184          * untested on non-native modes, so ignore it for now.
7185          * pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
7186          */
7187         pf = 0;
7188         pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
7189         intel_ring_emit(ring, pf | pipesrc);
7190
7191         intel_mark_page_flip_active(intel_crtc);
7192         intel_ring_advance(ring);
7193         return 0;
7194
7195 err_unpin:
7196         intel_unpin_fb_obj(obj);
7197 err:
7198         return ret;
7199 }
7200
7201 static int intel_gen6_queue_flip(struct drm_device *dev,
7202                                  struct drm_crtc *crtc,
7203                                  struct drm_framebuffer *fb,
7204                                  struct drm_i915_gem_object *obj)
7205 {
7206         struct drm_i915_private *dev_priv = dev->dev_private;
7207         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7208         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7209         uint32_t pf, pipesrc;
7210         int ret;
7211
7212         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7213         if (ret)
7214                 goto err;
7215
7216         ret = intel_ring_begin(ring, 4);
7217         if (ret)
7218                 goto err_unpin;
7219
7220         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7221                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7222         intel_ring_emit(ring, fb->pitches[0] | obj->tiling_mode);
7223         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7224
7225         /* Contrary to the suggestions in the documentation,
7226          * "Enable Panel Fitter" does not seem to be required when page
7227          * flipping with a non-native mode, and worse causes a normal
7228          * modeset to fail.
7229          * pf = I915_READ(PF_CTL(intel_crtc->pipe)) & PF_ENABLE;
7230          */
7231         pf = 0;
7232         pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
7233         intel_ring_emit(ring, pf | pipesrc);
7234
7235         intel_mark_page_flip_active(intel_crtc);
7236         intel_ring_advance(ring);
7237         return 0;
7238
7239 err_unpin:
7240         intel_unpin_fb_obj(obj);
7241 err:
7242         return ret;
7243 }
7244
7245 /*
7246  * On gen7 we currently use the blit ring because (in early silicon at least)
7247  * the render ring doesn't give us interrpts for page flip completion, which
7248  * means clients will hang after the first flip is queued.  Fortunately the
7249  * blit ring generates interrupts properly, so use it instead.
7250  */
7251 static int intel_gen7_queue_flip(struct drm_device *dev,
7252                                  struct drm_crtc *crtc,
7253                                  struct drm_framebuffer *fb,
7254                                  struct drm_i915_gem_object *obj)
7255 {
7256         struct drm_i915_private *dev_priv = dev->dev_private;
7257         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7258         struct intel_ring_buffer *ring = &dev_priv->ring[BCS];
7259         uint32_t plane_bit = 0;
7260         int ret;
7261
7262         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7263         if (ret)
7264                 goto err;
7265
7266         switch(intel_crtc->plane) {
7267         case PLANE_A:
7268                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_A;
7269                 break;
7270         case PLANE_B:
7271                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_B;
7272                 break;
7273         case PLANE_C:
7274                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_C;
7275                 break;
7276         default:
7277                 WARN_ONCE(1, "unknown plane in flip command\n");
7278                 ret = -ENODEV;
7279                 goto err_unpin;
7280         }
7281
7282         ret = intel_ring_begin(ring, 4);
7283         if (ret)
7284                 goto err_unpin;
7285
7286         intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 | plane_bit);
7287         intel_ring_emit(ring, (fb->pitches[0] | obj->tiling_mode));
7288         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7289         intel_ring_emit(ring, (MI_NOOP));
7290
7291         intel_mark_page_flip_active(intel_crtc);
7292         intel_ring_advance(ring);
7293         return 0;
7294
7295 err_unpin:
7296         intel_unpin_fb_obj(obj);
7297 err:
7298         return ret;
7299 }
7300
7301 static int intel_default_queue_flip(struct drm_device *dev,
7302                                     struct drm_crtc *crtc,
7303                                     struct drm_framebuffer *fb,
7304                                     struct drm_i915_gem_object *obj)
7305 {
7306         return -ENODEV;
7307 }
7308
7309 static int intel_crtc_page_flip(struct drm_crtc *crtc,
7310                                 struct drm_framebuffer *fb,
7311                                 struct drm_pending_vblank_event *event)
7312 {
7313         struct drm_device *dev = crtc->dev;
7314         struct drm_i915_private *dev_priv = dev->dev_private;
7315         struct drm_framebuffer *old_fb = crtc->fb;
7316         struct drm_i915_gem_object *obj = to_intel_framebuffer(fb)->obj;
7317         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7318         struct intel_unpin_work *work;
7319         unsigned long flags;
7320         int ret;
7321
7322         /* Can't change pixel format via MI display flips. */
7323         if (fb->pixel_format != crtc->fb->pixel_format)
7324                 return -EINVAL;
7325
7326         /*
7327          * TILEOFF/LINOFF registers can't be changed via MI display flips.
7328          * Note that pitch changes could also affect these register.
7329          */
7330         if (INTEL_INFO(dev)->gen > 3 &&
7331             (fb->offsets[0] != crtc->fb->offsets[0] ||
7332              fb->pitches[0] != crtc->fb->pitches[0]))
7333                 return -EINVAL;
7334
7335         work = kzalloc(sizeof *work, GFP_KERNEL);
7336         if (work == NULL)
7337                 return -ENOMEM;
7338
7339         work->event = event;
7340         work->crtc = crtc;
7341         work->old_fb_obj = to_intel_framebuffer(old_fb)->obj;
7342         INIT_WORK(&work->work, intel_unpin_work_fn);
7343
7344         ret = drm_vblank_get(dev, intel_crtc->pipe);
7345         if (ret)
7346                 goto free_work;
7347
7348         /* We borrow the event spin lock for protecting unpin_work */
7349         spin_lock_irqsave(&dev->event_lock, flags);
7350         if (intel_crtc->unpin_work) {
7351                 spin_unlock_irqrestore(&dev->event_lock, flags);
7352                 kfree(work);
7353                 drm_vblank_put(dev, intel_crtc->pipe);
7354
7355                 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
7356                 return -EBUSY;
7357         }
7358         intel_crtc->unpin_work = work;
7359         spin_unlock_irqrestore(&dev->event_lock, flags);
7360
7361         if (atomic_read(&intel_crtc->unpin_work_count) >= 2)
7362                 flush_workqueue(dev_priv->wq);
7363
7364         ret = i915_mutex_lock_interruptible(dev);
7365         if (ret)
7366                 goto cleanup;
7367
7368         /* Reference the objects for the scheduled work. */
7369         drm_gem_object_reference(&work->old_fb_obj->base);
7370         drm_gem_object_reference(&obj->base);
7371
7372         crtc->fb = fb;
7373
7374         work->pending_flip_obj = obj;
7375
7376         work->enable_stall_check = true;
7377
7378         atomic_inc(&intel_crtc->unpin_work_count);
7379         intel_crtc->reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
7380
7381         ret = dev_priv->display.queue_flip(dev, crtc, fb, obj);
7382         if (ret)
7383                 goto cleanup_pending;
7384
7385         intel_disable_fbc(dev);
7386         intel_mark_fb_busy(obj);
7387         mutex_unlock(&dev->struct_mutex);
7388
7389         trace_i915_flip_request(intel_crtc->plane, obj);
7390
7391         return 0;
7392
7393 cleanup_pending:
7394         atomic_dec(&intel_crtc->unpin_work_count);
7395         crtc->fb = old_fb;
7396         drm_gem_object_unreference(&work->old_fb_obj->base);
7397         drm_gem_object_unreference(&obj->base);
7398         mutex_unlock(&dev->struct_mutex);
7399
7400 cleanup:
7401         spin_lock_irqsave(&dev->event_lock, flags);
7402         intel_crtc->unpin_work = NULL;
7403         spin_unlock_irqrestore(&dev->event_lock, flags);
7404
7405         drm_vblank_put(dev, intel_crtc->pipe);
7406 free_work:
7407         kfree(work);
7408
7409         return ret;
7410 }
7411
7412 static struct drm_crtc_helper_funcs intel_helper_funcs = {
7413         .mode_set_base_atomic = intel_pipe_set_base_atomic,
7414         .load_lut = intel_crtc_load_lut,
7415 };
7416
7417 bool intel_encoder_check_is_cloned(struct intel_encoder *encoder)
7418 {
7419         struct intel_encoder *other_encoder;
7420         struct drm_crtc *crtc = &encoder->new_crtc->base;
7421
7422         if (WARN_ON(!crtc))
7423                 return false;
7424
7425         list_for_each_entry(other_encoder,
7426                             &crtc->dev->mode_config.encoder_list,
7427                             base.head) {
7428
7429                 if (&other_encoder->new_crtc->base != crtc ||
7430                     encoder == other_encoder)
7431                         continue;
7432                 else
7433                         return true;
7434         }
7435
7436         return false;
7437 }
7438
7439 static bool intel_encoder_crtc_ok(struct drm_encoder *encoder,
7440                                   struct drm_crtc *crtc)
7441 {
7442         struct drm_device *dev;
7443         struct drm_crtc *tmp;
7444         int crtc_mask = 1;
7445
7446         WARN(!crtc, "checking null crtc?\n");
7447
7448         dev = crtc->dev;
7449
7450         list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
7451                 if (tmp == crtc)
7452                         break;
7453                 crtc_mask <<= 1;
7454         }
7455
7456         if (encoder->possible_crtcs & crtc_mask)
7457                 return true;
7458         return false;
7459 }
7460
7461 /**
7462  * intel_modeset_update_staged_output_state
7463  *
7464  * Updates the staged output configuration state, e.g. after we've read out the
7465  * current hw state.
7466  */
7467 static void intel_modeset_update_staged_output_state(struct drm_device *dev)
7468 {
7469         struct intel_encoder *encoder;
7470         struct intel_connector *connector;
7471
7472         list_for_each_entry(connector, &dev->mode_config.connector_list,
7473                             base.head) {
7474                 connector->new_encoder =
7475                         to_intel_encoder(connector->base.encoder);
7476         }
7477
7478         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7479                             base.head) {
7480                 encoder->new_crtc =
7481                         to_intel_crtc(encoder->base.crtc);
7482         }
7483 }
7484
7485 /**
7486  * intel_modeset_commit_output_state
7487  *
7488  * This function copies the stage display pipe configuration to the real one.
7489  */
7490 static void intel_modeset_commit_output_state(struct drm_device *dev)
7491 {
7492         struct intel_encoder *encoder;
7493         struct intel_connector *connector;
7494
7495         list_for_each_entry(connector, &dev->mode_config.connector_list,
7496                             base.head) {
7497                 connector->base.encoder = &connector->new_encoder->base;
7498         }
7499
7500         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7501                             base.head) {
7502                 encoder->base.crtc = &encoder->new_crtc->base;
7503         }
7504 }
7505
7506 static int
7507 pipe_config_set_bpp(struct drm_crtc *crtc,
7508                     struct drm_framebuffer *fb,
7509                     struct intel_crtc_config *pipe_config)
7510 {
7511         struct drm_device *dev = crtc->dev;
7512         struct drm_connector *connector;
7513         int bpp;
7514
7515         switch (fb->pixel_format) {
7516         case DRM_FORMAT_C8:
7517                 bpp = 8*3; /* since we go through a colormap */
7518                 break;
7519         case DRM_FORMAT_XRGB1555:
7520         case DRM_FORMAT_ARGB1555:
7521                 /* checked in intel_framebuffer_init already */
7522                 if (WARN_ON(INTEL_INFO(dev)->gen > 3))
7523                         return -EINVAL;
7524         case DRM_FORMAT_RGB565:
7525                 bpp = 6*3; /* min is 18bpp */
7526                 break;
7527         case DRM_FORMAT_XBGR8888:
7528         case DRM_FORMAT_ABGR8888:
7529                 /* checked in intel_framebuffer_init already */
7530                 if (WARN_ON(INTEL_INFO(dev)->gen < 4))
7531                         return -EINVAL;
7532         case DRM_FORMAT_XRGB8888:
7533         case DRM_FORMAT_ARGB8888:
7534                 bpp = 8*3;
7535                 break;
7536         case DRM_FORMAT_XRGB2101010:
7537         case DRM_FORMAT_ARGB2101010:
7538         case DRM_FORMAT_XBGR2101010:
7539         case DRM_FORMAT_ABGR2101010:
7540                 /* checked in intel_framebuffer_init already */
7541                 if (WARN_ON(INTEL_INFO(dev)->gen < 4))
7542                         return -EINVAL;
7543                 bpp = 10*3;
7544                 break;
7545         /* TODO: gen4+ supports 16 bpc floating point, too. */
7546         default:
7547                 DRM_DEBUG_KMS("unsupported depth\n");
7548                 return -EINVAL;
7549         }
7550
7551         pipe_config->pipe_bpp = bpp;
7552
7553         /* Clamp display bpp to EDID value */
7554         list_for_each_entry(connector, &dev->mode_config.connector_list,
7555                             head) {
7556                 if (connector->encoder && connector->encoder->crtc != crtc)
7557                         continue;
7558
7559                 /* Don't use an invalid EDID bpc value */
7560                 if (connector->display_info.bpc &&
7561                     connector->display_info.bpc * 3 < bpp) {
7562                         DRM_DEBUG_KMS("clamping display bpp (was %d) to EDID reported max of %d\n",
7563                                       bpp, connector->display_info.bpc*3);
7564                         pipe_config->pipe_bpp = connector->display_info.bpc*3;
7565                 }
7566         }
7567
7568         return bpp;
7569 }
7570
7571 static struct intel_crtc_config *
7572 intel_modeset_pipe_config(struct drm_crtc *crtc,
7573                           struct drm_framebuffer *fb,
7574                           struct drm_display_mode *mode)
7575 {
7576         struct drm_device *dev = crtc->dev;
7577         struct drm_encoder_helper_funcs *encoder_funcs;
7578         struct intel_encoder *encoder;
7579         struct intel_crtc_config *pipe_config;
7580         int plane_bpp;
7581
7582         pipe_config = kzalloc(sizeof(*pipe_config), GFP_KERNEL);
7583         if (!pipe_config)
7584                 return ERR_PTR(-ENOMEM);
7585
7586         drm_mode_copy(&pipe_config->adjusted_mode, mode);
7587         drm_mode_copy(&pipe_config->requested_mode, mode);
7588
7589         plane_bpp = pipe_config_set_bpp(crtc, fb, pipe_config);
7590         if (plane_bpp < 0)
7591                 goto fail;
7592
7593         /* Pass our mode to the connectors and the CRTC to give them a chance to
7594          * adjust it according to limitations or connector properties, and also
7595          * a chance to reject the mode entirely.
7596          */
7597         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7598                             base.head) {
7599
7600                 if (&encoder->new_crtc->base != crtc)
7601                         continue;
7602
7603                 if (encoder->compute_config) {
7604                         if (!(encoder->compute_config(encoder, pipe_config))) {
7605                                 DRM_DEBUG_KMS("Encoder config failure\n");
7606                                 goto fail;
7607                         }
7608
7609                         continue;
7610                 }
7611
7612                 encoder_funcs = encoder->base.helper_private;
7613                 if (!(encoder_funcs->mode_fixup(&encoder->base,
7614                                                 &pipe_config->requested_mode,
7615                                                 &pipe_config->adjusted_mode))) {
7616                         DRM_DEBUG_KMS("Encoder fixup failed\n");
7617                         goto fail;
7618                 }
7619         }
7620
7621         if (!(intel_crtc_compute_config(crtc, pipe_config))) {
7622                 DRM_DEBUG_KMS("CRTC fixup failed\n");
7623                 goto fail;
7624         }
7625         DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
7626
7627         pipe_config->dither = pipe_config->pipe_bpp != plane_bpp;
7628         DRM_DEBUG_KMS("plane bpp: %i, pipe bpp: %i, dithering: %i\n",
7629                       plane_bpp, pipe_config->pipe_bpp, pipe_config->dither);
7630
7631         return pipe_config;
7632 fail:
7633         kfree(pipe_config);
7634         return ERR_PTR(-EINVAL);
7635 }
7636
7637 /* Computes which crtcs are affected and sets the relevant bits in the mask. For
7638  * simplicity we use the crtc's pipe number (because it's easier to obtain). */
7639 static void
7640 intel_modeset_affected_pipes(struct drm_crtc *crtc, unsigned *modeset_pipes,
7641                              unsigned *prepare_pipes, unsigned *disable_pipes)
7642 {
7643         struct intel_crtc *intel_crtc;
7644         struct drm_device *dev = crtc->dev;
7645         struct intel_encoder *encoder;
7646         struct intel_connector *connector;
7647         struct drm_crtc *tmp_crtc;
7648
7649         *disable_pipes = *modeset_pipes = *prepare_pipes = 0;
7650
7651         /* Check which crtcs have changed outputs connected to them, these need
7652          * to be part of the prepare_pipes mask. We don't (yet) support global
7653          * modeset across multiple crtcs, so modeset_pipes will only have one
7654          * bit set at most. */
7655         list_for_each_entry(connector, &dev->mode_config.connector_list,
7656                             base.head) {
7657                 if (connector->base.encoder == &connector->new_encoder->base)
7658                         continue;
7659
7660                 if (connector->base.encoder) {
7661                         tmp_crtc = connector->base.encoder->crtc;
7662
7663                         *prepare_pipes |= 1 << to_intel_crtc(tmp_crtc)->pipe;
7664                 }
7665
7666                 if (connector->new_encoder)
7667                         *prepare_pipes |=
7668                                 1 << connector->new_encoder->new_crtc->pipe;
7669         }
7670
7671         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7672                             base.head) {
7673                 if (encoder->base.crtc == &encoder->new_crtc->base)
7674                         continue;
7675
7676                 if (encoder->base.crtc) {
7677                         tmp_crtc = encoder->base.crtc;
7678
7679                         *prepare_pipes |= 1 << to_intel_crtc(tmp_crtc)->pipe;
7680                 }
7681
7682                 if (encoder->new_crtc)
7683                         *prepare_pipes |= 1 << encoder->new_crtc->pipe;
7684         }
7685
7686         /* Check for any pipes that will be fully disabled ... */
7687         list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list,
7688                             base.head) {
7689                 bool used = false;
7690
7691                 /* Don't try to disable disabled crtcs. */
7692                 if (!intel_crtc->base.enabled)
7693                         continue;
7694
7695                 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7696                                     base.head) {
7697                         if (encoder->new_crtc == intel_crtc)
7698                                 used = true;
7699                 }
7700
7701                 if (!used)
7702                         *disable_pipes |= 1 << intel_crtc->pipe;
7703         }
7704
7705
7706         /* set_mode is also used to update properties on life display pipes. */
7707         intel_crtc = to_intel_crtc(crtc);
7708         if (crtc->enabled)
7709                 *prepare_pipes |= 1 << intel_crtc->pipe;
7710
7711         /* We only support modeset on one single crtc, hence we need to do that
7712          * only for the passed in crtc iff we change anything else than just
7713          * disable crtcs.
7714          *
7715          * This is actually not true, to be fully compatible with the old crtc
7716          * helper we automatically disable _any_ output (i.e. doesn't need to be
7717          * connected to the crtc we're modesetting on) if it's disconnected.
7718          * Which is a rather nutty api (since changed the output configuration
7719          * without userspace's explicit request can lead to confusion), but
7720          * alas. Hence we currently need to modeset on all pipes we prepare. */
7721         if (*prepare_pipes)
7722                 *modeset_pipes = *prepare_pipes;
7723
7724         /* ... and mask these out. */
7725         *modeset_pipes &= ~(*disable_pipes);
7726         *prepare_pipes &= ~(*disable_pipes);
7727 }
7728
7729 static bool intel_crtc_in_use(struct drm_crtc *crtc)
7730 {
7731         struct drm_encoder *encoder;
7732         struct drm_device *dev = crtc->dev;
7733
7734         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
7735                 if (encoder->crtc == crtc)
7736                         return true;
7737
7738         return false;
7739 }
7740
7741 static void
7742 intel_modeset_update_state(struct drm_device *dev, unsigned prepare_pipes)
7743 {
7744         struct intel_encoder *intel_encoder;
7745         struct intel_crtc *intel_crtc;
7746         struct drm_connector *connector;
7747
7748         list_for_each_entry(intel_encoder, &dev->mode_config.encoder_list,
7749                             base.head) {
7750                 if (!intel_encoder->base.crtc)
7751                         continue;
7752
7753                 intel_crtc = to_intel_crtc(intel_encoder->base.crtc);
7754
7755                 if (prepare_pipes & (1 << intel_crtc->pipe))
7756                         intel_encoder->connectors_active = false;
7757         }
7758
7759         intel_modeset_commit_output_state(dev);
7760
7761         /* Update computed state. */
7762         list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list,
7763                             base.head) {
7764                 intel_crtc->base.enabled = intel_crtc_in_use(&intel_crtc->base);
7765         }
7766
7767         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
7768                 if (!connector->encoder || !connector->encoder->crtc)
7769                         continue;
7770
7771                 intel_crtc = to_intel_crtc(connector->encoder->crtc);
7772
7773                 if (prepare_pipes & (1 << intel_crtc->pipe)) {
7774                         struct drm_property *dpms_property =
7775                                 dev->mode_config.dpms_property;
7776
7777                         connector->dpms = DRM_MODE_DPMS_ON;
7778                         drm_object_property_set_value(&connector->base,
7779                                                          dpms_property,
7780                                                          DRM_MODE_DPMS_ON);
7781
7782                         intel_encoder = to_intel_encoder(connector->encoder);
7783                         intel_encoder->connectors_active = true;
7784                 }
7785         }
7786
7787 }
7788
7789 #define for_each_intel_crtc_masked(dev, mask, intel_crtc) \
7790         list_for_each_entry((intel_crtc), \
7791                             &(dev)->mode_config.crtc_list, \
7792                             base.head) \
7793                 if (mask & (1 <<(intel_crtc)->pipe)) \
7794
7795 static bool
7796 intel_pipe_config_compare(struct intel_crtc_config *current_config,
7797                           struct intel_crtc_config *pipe_config)
7798 {
7799         if (current_config->has_pch_encoder != pipe_config->has_pch_encoder) {
7800                 DRM_ERROR("mismatch in has_pch_encoder "
7801                           "(expected %i, found %i)\n",
7802                           current_config->has_pch_encoder,
7803                           pipe_config->has_pch_encoder);
7804                 return false;
7805         }
7806
7807         return true;
7808 }
7809
7810 void
7811 intel_modeset_check_state(struct drm_device *dev)
7812 {
7813         drm_i915_private_t *dev_priv = dev->dev_private;
7814         struct intel_crtc *crtc;
7815         struct intel_encoder *encoder;
7816         struct intel_connector *connector;
7817         struct intel_crtc_config pipe_config;
7818
7819         list_for_each_entry(connector, &dev->mode_config.connector_list,
7820                             base.head) {
7821                 /* This also checks the encoder/connector hw state with the
7822                  * ->get_hw_state callbacks. */
7823                 intel_connector_check_state(connector);
7824
7825                 WARN(&connector->new_encoder->base != connector->base.encoder,
7826                      "connector's staged encoder doesn't match current encoder\n");
7827         }
7828
7829         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7830                             base.head) {
7831                 bool enabled = false;
7832                 bool active = false;
7833                 enum pipe pipe, tracked_pipe;
7834
7835                 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n",
7836                               encoder->base.base.id,
7837                               drm_get_encoder_name(&encoder->base));
7838
7839                 WARN(&encoder->new_crtc->base != encoder->base.crtc,
7840                      "encoder's stage crtc doesn't match current crtc\n");
7841                 WARN(encoder->connectors_active && !encoder->base.crtc,
7842                      "encoder's active_connectors set, but no crtc\n");
7843
7844                 list_for_each_entry(connector, &dev->mode_config.connector_list,
7845                                     base.head) {
7846                         if (connector->base.encoder != &encoder->base)
7847                                 continue;
7848                         enabled = true;
7849                         if (connector->base.dpms != DRM_MODE_DPMS_OFF)
7850                                 active = true;
7851                 }
7852                 WARN(!!encoder->base.crtc != enabled,
7853                      "encoder's enabled state mismatch "
7854                      "(expected %i, found %i)\n",
7855                      !!encoder->base.crtc, enabled);
7856                 WARN(active && !encoder->base.crtc,
7857                      "active encoder with no crtc\n");
7858
7859                 WARN(encoder->connectors_active != active,
7860                      "encoder's computed active state doesn't match tracked active state "
7861                      "(expected %i, found %i)\n", active, encoder->connectors_active);
7862
7863                 active = encoder->get_hw_state(encoder, &pipe);
7864                 WARN(active != encoder->connectors_active,
7865                      "encoder's hw state doesn't match sw tracking "
7866                      "(expected %i, found %i)\n",
7867                      encoder->connectors_active, active);
7868
7869                 if (!encoder->base.crtc)
7870                         continue;
7871
7872                 tracked_pipe = to_intel_crtc(encoder->base.crtc)->pipe;
7873                 WARN(active && pipe != tracked_pipe,
7874                      "active encoder's pipe doesn't match"
7875                      "(expected %i, found %i)\n",
7876                      tracked_pipe, pipe);
7877
7878         }
7879
7880         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
7881                             base.head) {
7882                 bool enabled = false;
7883                 bool active = false;
7884
7885                 DRM_DEBUG_KMS("[CRTC:%d]\n",
7886                               crtc->base.base.id);
7887
7888                 WARN(crtc->active && !crtc->base.enabled,
7889                      "active crtc, but not enabled in sw tracking\n");
7890
7891                 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7892                                     base.head) {
7893                         if (encoder->base.crtc != &crtc->base)
7894                                 continue;
7895                         enabled = true;
7896                         if (encoder->connectors_active)
7897                                 active = true;
7898                 }
7899                 WARN(active != crtc->active,
7900                      "crtc's computed active state doesn't match tracked active state "
7901                      "(expected %i, found %i)\n", active, crtc->active);
7902                 WARN(enabled != crtc->base.enabled,
7903                      "crtc's computed enabled state doesn't match tracked enabled state "
7904                      "(expected %i, found %i)\n", enabled, crtc->base.enabled);
7905
7906                 memset(&pipe_config, 0, sizeof(pipe_config));
7907                 active = dev_priv->display.get_pipe_config(crtc,
7908                                                            &pipe_config);
7909                 WARN(crtc->active != active,
7910                      "crtc active state doesn't match with hw state "
7911                      "(expected %i, found %i)\n", crtc->active, active);
7912
7913                 WARN(active &&
7914                      !intel_pipe_config_compare(&crtc->config, &pipe_config),
7915                      "pipe state doesn't match!\n");
7916         }
7917 }
7918
7919 static int __intel_set_mode(struct drm_crtc *crtc,
7920                             struct drm_display_mode *mode,
7921                             int x, int y, struct drm_framebuffer *fb)
7922 {
7923         struct drm_device *dev = crtc->dev;
7924         drm_i915_private_t *dev_priv = dev->dev_private;
7925         struct drm_display_mode *saved_mode, *saved_hwmode;
7926         struct intel_crtc_config *pipe_config = NULL;
7927         struct intel_crtc *intel_crtc;
7928         unsigned disable_pipes, prepare_pipes, modeset_pipes;
7929         int ret = 0;
7930
7931         saved_mode = kmalloc(2 * sizeof(*saved_mode), GFP_KERNEL);
7932         if (!saved_mode)
7933                 return -ENOMEM;
7934         saved_hwmode = saved_mode + 1;
7935
7936         intel_modeset_affected_pipes(crtc, &modeset_pipes,
7937                                      &prepare_pipes, &disable_pipes);
7938
7939         *saved_hwmode = crtc->hwmode;
7940         *saved_mode = crtc->mode;
7941
7942         /* Hack: Because we don't (yet) support global modeset on multiple
7943          * crtcs, we don't keep track of the new mode for more than one crtc.
7944          * Hence simply check whether any bit is set in modeset_pipes in all the
7945          * pieces of code that are not yet converted to deal with mutliple crtcs
7946          * changing their mode at the same time. */
7947         if (modeset_pipes) {
7948                 pipe_config = intel_modeset_pipe_config(crtc, fb, mode);
7949                 if (IS_ERR(pipe_config)) {
7950                         ret = PTR_ERR(pipe_config);
7951                         pipe_config = NULL;
7952
7953                         goto out;
7954                 }
7955         }
7956
7957         DRM_DEBUG_KMS("set mode pipe masks: modeset: %x, prepare: %x, disable: %x\n",
7958                       modeset_pipes, prepare_pipes, disable_pipes);
7959
7960         for_each_intel_crtc_masked(dev, disable_pipes, intel_crtc)
7961                 intel_crtc_disable(&intel_crtc->base);
7962
7963         for_each_intel_crtc_masked(dev, prepare_pipes, intel_crtc) {
7964                 if (intel_crtc->base.enabled)
7965                         dev_priv->display.crtc_disable(&intel_crtc->base);
7966         }
7967
7968         /* crtc->mode is already used by the ->mode_set callbacks, hence we need
7969          * to set it here already despite that we pass it down the callchain.
7970          */
7971         if (modeset_pipes) {
7972                 crtc->mode = *mode;
7973                 /* mode_set/enable/disable functions rely on a correct pipe
7974                  * config. */
7975                 to_intel_crtc(crtc)->config = *pipe_config;
7976         }
7977
7978         /* Only after disabling all output pipelines that will be changed can we
7979          * update the the output configuration. */
7980         intel_modeset_update_state(dev, prepare_pipes);
7981
7982         if (dev_priv->display.modeset_global_resources)
7983                 dev_priv->display.modeset_global_resources(dev);
7984
7985         /* Set up the DPLL and any encoders state that needs to adjust or depend
7986          * on the DPLL.
7987          */
7988         for_each_intel_crtc_masked(dev, modeset_pipes, intel_crtc) {
7989                 ret = intel_crtc_mode_set(&intel_crtc->base,
7990                                           x, y, fb);
7991                 if (ret)
7992                         goto done;
7993         }
7994
7995         /* Now enable the clocks, plane, pipe, and connectors that we set up. */
7996         for_each_intel_crtc_masked(dev, prepare_pipes, intel_crtc)
7997                 dev_priv->display.crtc_enable(&intel_crtc->base);
7998
7999         if (modeset_pipes) {
8000                 /* Store real post-adjustment hardware mode. */
8001                 crtc->hwmode = pipe_config->adjusted_mode;
8002
8003                 /* Calculate and store various constants which
8004                  * are later needed by vblank and swap-completion
8005                  * timestamping. They are derived from true hwmode.
8006                  */
8007                 drm_calc_timestamping_constants(crtc);
8008         }
8009
8010         /* FIXME: add subpixel order */
8011 done:
8012         if (ret && crtc->enabled) {
8013                 crtc->hwmode = *saved_hwmode;
8014                 crtc->mode = *saved_mode;
8015         }
8016
8017 out:
8018         kfree(pipe_config);
8019         kfree(saved_mode);
8020         return ret;
8021 }
8022
8023 int intel_set_mode(struct drm_crtc *crtc,
8024                      struct drm_display_mode *mode,
8025                      int x, int y, struct drm_framebuffer *fb)
8026 {
8027         int ret;
8028
8029         ret = __intel_set_mode(crtc, mode, x, y, fb);
8030
8031         if (ret == 0)
8032                 intel_modeset_check_state(crtc->dev);
8033
8034         return ret;
8035 }
8036
8037 void intel_crtc_restore_mode(struct drm_crtc *crtc)
8038 {
8039         intel_set_mode(crtc, &crtc->mode, crtc->x, crtc->y, crtc->fb);
8040 }
8041
8042 #undef for_each_intel_crtc_masked
8043
8044 static void intel_set_config_free(struct intel_set_config *config)
8045 {
8046         if (!config)
8047                 return;
8048
8049         kfree(config->save_connector_encoders);
8050         kfree(config->save_encoder_crtcs);
8051         kfree(config);
8052 }
8053
8054 static int intel_set_config_save_state(struct drm_device *dev,
8055                                        struct intel_set_config *config)
8056 {
8057         struct drm_encoder *encoder;
8058         struct drm_connector *connector;
8059         int count;
8060
8061         config->save_encoder_crtcs =
8062                 kcalloc(dev->mode_config.num_encoder,
8063                         sizeof(struct drm_crtc *), GFP_KERNEL);
8064         if (!config->save_encoder_crtcs)
8065                 return -ENOMEM;
8066
8067         config->save_connector_encoders =
8068                 kcalloc(dev->mode_config.num_connector,
8069                         sizeof(struct drm_encoder *), GFP_KERNEL);
8070         if (!config->save_connector_encoders)
8071                 return -ENOMEM;
8072
8073         /* Copy data. Note that driver private data is not affected.
8074          * Should anything bad happen only the expected state is
8075          * restored, not the drivers personal bookkeeping.
8076          */
8077         count = 0;
8078         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
8079                 config->save_encoder_crtcs[count++] = encoder->crtc;
8080         }
8081
8082         count = 0;
8083         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
8084                 config->save_connector_encoders[count++] = connector->encoder;
8085         }
8086
8087         return 0;
8088 }
8089
8090 static void intel_set_config_restore_state(struct drm_device *dev,
8091                                            struct intel_set_config *config)
8092 {
8093         struct intel_encoder *encoder;
8094         struct intel_connector *connector;
8095         int count;
8096
8097         count = 0;
8098         list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
8099                 encoder->new_crtc =
8100                         to_intel_crtc(config->save_encoder_crtcs[count++]);
8101         }
8102
8103         count = 0;
8104         list_for_each_entry(connector, &dev->mode_config.connector_list, base.head) {
8105                 connector->new_encoder =
8106                         to_intel_encoder(config->save_connector_encoders[count++]);
8107         }
8108 }
8109
8110 static void
8111 intel_set_config_compute_mode_changes(struct drm_mode_set *set,
8112                                       struct intel_set_config *config)
8113 {
8114
8115         /* We should be able to check here if the fb has the same properties
8116          * and then just flip_or_move it */
8117         if (set->crtc->fb != set->fb) {
8118                 /* If we have no fb then treat it as a full mode set */
8119                 if (set->crtc->fb == NULL) {
8120                         DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
8121                         config->mode_changed = true;
8122                 } else if (set->fb == NULL) {
8123                         config->mode_changed = true;
8124                 } else if (set->fb->pixel_format !=
8125                            set->crtc->fb->pixel_format) {
8126                         config->mode_changed = true;
8127                 } else
8128                         config->fb_changed = true;
8129         }
8130
8131         if (set->fb && (set->x != set->crtc->x || set->y != set->crtc->y))
8132                 config->fb_changed = true;
8133
8134         if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
8135                 DRM_DEBUG_KMS("modes are different, full mode set\n");
8136                 drm_mode_debug_printmodeline(&set->crtc->mode);
8137                 drm_mode_debug_printmodeline(set->mode);
8138                 config->mode_changed = true;
8139         }
8140 }
8141
8142 static int
8143 intel_modeset_stage_output_state(struct drm_device *dev,
8144                                  struct drm_mode_set *set,
8145                                  struct intel_set_config *config)
8146 {
8147         struct drm_crtc *new_crtc;
8148         struct intel_connector *connector;
8149         struct intel_encoder *encoder;
8150         int count, ro;
8151
8152         /* The upper layers ensure that we either disable a crtc or have a list
8153          * of connectors. For paranoia, double-check this. */
8154         WARN_ON(!set->fb && (set->num_connectors != 0));
8155         WARN_ON(set->fb && (set->num_connectors == 0));
8156
8157         count = 0;
8158         list_for_each_entry(connector, &dev->mode_config.connector_list,
8159                             base.head) {
8160                 /* Otherwise traverse passed in connector list and get encoders
8161                  * for them. */
8162                 for (ro = 0; ro < set->num_connectors; ro++) {
8163                         if (set->connectors[ro] == &connector->base) {
8164                                 connector->new_encoder = connector->encoder;
8165                                 break;
8166                         }
8167                 }
8168
8169                 /* If we disable the crtc, disable all its connectors. Also, if
8170                  * the connector is on the changing crtc but not on the new
8171                  * connector list, disable it. */
8172                 if ((!set->fb || ro == set->num_connectors) &&
8173                     connector->base.encoder &&
8174                     connector->base.encoder->crtc == set->crtc) {
8175                         connector->new_encoder = NULL;
8176
8177                         DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
8178                                 connector->base.base.id,
8179                                 drm_get_connector_name(&connector->base));
8180                 }
8181
8182
8183                 if (&connector->new_encoder->base != connector->base.encoder) {
8184                         DRM_DEBUG_KMS("encoder changed, full mode switch\n");
8185                         config->mode_changed = true;
8186                 }
8187         }
8188         /* connector->new_encoder is now updated for all connectors. */
8189
8190         /* Update crtc of enabled connectors. */
8191         count = 0;
8192         list_for_each_entry(connector, &dev->mode_config.connector_list,
8193                             base.head) {
8194                 if (!connector->new_encoder)
8195                         continue;
8196
8197                 new_crtc = connector->new_encoder->base.crtc;
8198
8199                 for (ro = 0; ro < set->num_connectors; ro++) {
8200                         if (set->connectors[ro] == &connector->base)
8201                                 new_crtc = set->crtc;
8202                 }
8203
8204                 /* Make sure the new CRTC will work with the encoder */
8205                 if (!intel_encoder_crtc_ok(&connector->new_encoder->base,
8206                                            new_crtc)) {
8207                         return -EINVAL;
8208                 }
8209                 connector->encoder->new_crtc = to_intel_crtc(new_crtc);
8210
8211                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
8212                         connector->base.base.id,
8213                         drm_get_connector_name(&connector->base),
8214                         new_crtc->base.id);
8215         }
8216
8217         /* Check for any encoders that needs to be disabled. */
8218         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8219                             base.head) {
8220                 list_for_each_entry(connector,
8221                                     &dev->mode_config.connector_list,
8222                                     base.head) {
8223                         if (connector->new_encoder == encoder) {
8224                                 WARN_ON(!connector->new_encoder->new_crtc);
8225
8226                                 goto next_encoder;
8227                         }
8228                 }
8229                 encoder->new_crtc = NULL;
8230 next_encoder:
8231                 /* Only now check for crtc changes so we don't miss encoders
8232                  * that will be disabled. */
8233                 if (&encoder->new_crtc->base != encoder->base.crtc) {
8234                         DRM_DEBUG_KMS("crtc changed, full mode switch\n");
8235                         config->mode_changed = true;
8236                 }
8237         }
8238         /* Now we've also updated encoder->new_crtc for all encoders. */
8239
8240         return 0;
8241 }
8242
8243 static int intel_crtc_set_config(struct drm_mode_set *set)
8244 {
8245         struct drm_device *dev;
8246         struct drm_mode_set save_set;
8247         struct intel_set_config *config;
8248         int ret;
8249
8250         BUG_ON(!set);
8251         BUG_ON(!set->crtc);
8252         BUG_ON(!set->crtc->helper_private);
8253
8254         /* Enforce sane interface api - has been abused by the fb helper. */
8255         BUG_ON(!set->mode && set->fb);
8256         BUG_ON(set->fb && set->num_connectors == 0);
8257
8258         if (set->fb) {
8259                 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
8260                                 set->crtc->base.id, set->fb->base.id,
8261                                 (int)set->num_connectors, set->x, set->y);
8262         } else {
8263                 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
8264         }
8265
8266         dev = set->crtc->dev;
8267
8268         ret = -ENOMEM;
8269         config = kzalloc(sizeof(*config), GFP_KERNEL);
8270         if (!config)
8271                 goto out_config;
8272
8273         ret = intel_set_config_save_state(dev, config);
8274         if (ret)
8275                 goto out_config;
8276
8277         save_set.crtc = set->crtc;
8278         save_set.mode = &set->crtc->mode;
8279         save_set.x = set->crtc->x;
8280         save_set.y = set->crtc->y;
8281         save_set.fb = set->crtc->fb;
8282
8283         /* Compute whether we need a full modeset, only an fb base update or no
8284          * change at all. In the future we might also check whether only the
8285          * mode changed, e.g. for LVDS where we only change the panel fitter in
8286          * such cases. */
8287         intel_set_config_compute_mode_changes(set, config);
8288
8289         ret = intel_modeset_stage_output_state(dev, set, config);
8290         if (ret)
8291                 goto fail;
8292
8293         if (config->mode_changed) {
8294                 if (set->mode) {
8295                         DRM_DEBUG_KMS("attempting to set mode from"
8296                                         " userspace\n");
8297                         drm_mode_debug_printmodeline(set->mode);
8298                 }
8299
8300                 ret = intel_set_mode(set->crtc, set->mode,
8301                                      set->x, set->y, set->fb);
8302                 if (ret) {
8303                         DRM_ERROR("failed to set mode on [CRTC:%d], err = %d\n",
8304                                   set->crtc->base.id, ret);
8305                         goto fail;
8306                 }
8307         } else if (config->fb_changed) {
8308                 intel_crtc_wait_for_pending_flips(set->crtc);
8309
8310                 ret = intel_pipe_set_base(set->crtc,
8311                                           set->x, set->y, set->fb);
8312         }
8313
8314         intel_set_config_free(config);
8315
8316         return 0;
8317
8318 fail:
8319         intel_set_config_restore_state(dev, config);
8320
8321         /* Try to restore the config */
8322         if (config->mode_changed &&
8323             intel_set_mode(save_set.crtc, save_set.mode,
8324                            save_set.x, save_set.y, save_set.fb))
8325                 DRM_ERROR("failed to restore config after modeset failure\n");
8326
8327 out_config:
8328         intel_set_config_free(config);
8329         return ret;
8330 }
8331
8332 static const struct drm_crtc_funcs intel_crtc_funcs = {
8333         .cursor_set = intel_crtc_cursor_set,
8334         .cursor_move = intel_crtc_cursor_move,
8335         .gamma_set = intel_crtc_gamma_set,
8336         .set_config = intel_crtc_set_config,
8337         .destroy = intel_crtc_destroy,
8338         .page_flip = intel_crtc_page_flip,
8339 };
8340
8341 static void intel_cpu_pll_init(struct drm_device *dev)
8342 {
8343         if (HAS_DDI(dev))
8344                 intel_ddi_pll_init(dev);
8345 }
8346
8347 static void intel_pch_pll_init(struct drm_device *dev)
8348 {
8349         drm_i915_private_t *dev_priv = dev->dev_private;
8350         int i;
8351
8352         if (dev_priv->num_pch_pll == 0) {
8353                 DRM_DEBUG_KMS("No PCH PLLs on this hardware, skipping initialisation\n");
8354                 return;
8355         }
8356
8357         for (i = 0; i < dev_priv->num_pch_pll; i++) {
8358                 dev_priv->pch_plls[i].pll_reg = _PCH_DPLL(i);
8359                 dev_priv->pch_plls[i].fp0_reg = _PCH_FP0(i);
8360                 dev_priv->pch_plls[i].fp1_reg = _PCH_FP1(i);
8361         }
8362 }
8363
8364 static void intel_crtc_init(struct drm_device *dev, int pipe)
8365 {
8366         drm_i915_private_t *dev_priv = dev->dev_private;
8367         struct intel_crtc *intel_crtc;
8368         int i;
8369
8370         intel_crtc = kzalloc(sizeof(struct intel_crtc) + (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
8371         if (intel_crtc == NULL)
8372                 return;
8373
8374         drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);
8375
8376         drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
8377         for (i = 0; i < 256; i++) {
8378                 intel_crtc->lut_r[i] = i;
8379                 intel_crtc->lut_g[i] = i;
8380                 intel_crtc->lut_b[i] = i;
8381         }
8382
8383         /* Swap pipes & planes for FBC on pre-965 */
8384         intel_crtc->pipe = pipe;
8385         intel_crtc->plane = pipe;
8386         intel_crtc->cpu_transcoder = pipe;
8387         if (IS_MOBILE(dev) && IS_GEN3(dev)) {
8388                 DRM_DEBUG_KMS("swapping pipes & planes for FBC\n");
8389                 intel_crtc->plane = !pipe;
8390         }
8391
8392         BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
8393                dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
8394         dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
8395         dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;
8396
8397         drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
8398 }
8399
8400 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
8401                                 struct drm_file *file)
8402 {
8403         struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
8404         struct drm_mode_object *drmmode_obj;
8405         struct intel_crtc *crtc;
8406
8407         if (!drm_core_check_feature(dev, DRIVER_MODESET))
8408                 return -ENODEV;
8409
8410         drmmode_obj = drm_mode_object_find(dev, pipe_from_crtc_id->crtc_id,
8411                         DRM_MODE_OBJECT_CRTC);
8412
8413         if (!drmmode_obj) {
8414                 DRM_ERROR("no such CRTC id\n");
8415                 return -EINVAL;
8416         }
8417
8418         crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
8419         pipe_from_crtc_id->pipe = crtc->pipe;
8420
8421         return 0;
8422 }
8423
8424 static int intel_encoder_clones(struct intel_encoder *encoder)
8425 {
8426         struct drm_device *dev = encoder->base.dev;
8427         struct intel_encoder *source_encoder;
8428         int index_mask = 0;
8429         int entry = 0;
8430
8431         list_for_each_entry(source_encoder,
8432                             &dev->mode_config.encoder_list, base.head) {
8433
8434                 if (encoder == source_encoder)
8435                         index_mask |= (1 << entry);
8436
8437                 /* Intel hw has only one MUX where enocoders could be cloned. */
8438                 if (encoder->cloneable && source_encoder->cloneable)
8439                         index_mask |= (1 << entry);
8440
8441                 entry++;
8442         }
8443
8444         return index_mask;
8445 }
8446
8447 static bool has_edp_a(struct drm_device *dev)
8448 {
8449         struct drm_i915_private *dev_priv = dev->dev_private;
8450
8451         if (!IS_MOBILE(dev))
8452                 return false;
8453
8454         if ((I915_READ(DP_A) & DP_DETECTED) == 0)
8455                 return false;
8456
8457         if (IS_GEN5(dev) &&
8458             (I915_READ(ILK_DISPLAY_CHICKEN_FUSES) & ILK_eDP_A_DISABLE))
8459                 return false;
8460
8461         return true;
8462 }
8463
8464 static void intel_setup_outputs(struct drm_device *dev)
8465 {
8466         struct drm_i915_private *dev_priv = dev->dev_private;
8467         struct intel_encoder *encoder;
8468         bool dpd_is_edp = false;
8469         bool has_lvds;
8470
8471         has_lvds = intel_lvds_init(dev);
8472         if (!has_lvds && !HAS_PCH_SPLIT(dev)) {
8473                 /* disable the panel fitter on everything but LVDS */
8474                 I915_WRITE(PFIT_CONTROL, 0);
8475         }
8476
8477         if (!(HAS_DDI(dev) && (I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES)))
8478                 intel_crt_init(dev);
8479
8480         if (HAS_DDI(dev)) {
8481                 int found;
8482
8483                 /* Haswell uses DDI functions to detect digital outputs */
8484                 found = I915_READ(DDI_BUF_CTL_A) & DDI_INIT_DISPLAY_DETECTED;
8485                 /* DDI A only supports eDP */
8486                 if (found)
8487                         intel_ddi_init(dev, PORT_A);
8488
8489                 /* DDI B, C and D detection is indicated by the SFUSE_STRAP
8490                  * register */
8491                 found = I915_READ(SFUSE_STRAP);
8492
8493                 if (found & SFUSE_STRAP_DDIB_DETECTED)
8494                         intel_ddi_init(dev, PORT_B);
8495                 if (found & SFUSE_STRAP_DDIC_DETECTED)
8496                         intel_ddi_init(dev, PORT_C);
8497                 if (found & SFUSE_STRAP_DDID_DETECTED)
8498                         intel_ddi_init(dev, PORT_D);
8499         } else if (HAS_PCH_SPLIT(dev)) {
8500                 int found;
8501                 dpd_is_edp = intel_dpd_is_edp(dev);
8502
8503                 if (has_edp_a(dev))
8504                         intel_dp_init(dev, DP_A, PORT_A);
8505
8506                 if (I915_READ(PCH_HDMIB) & SDVO_DETECTED) {
8507                         /* PCH SDVOB multiplex with HDMIB */
8508                         found = intel_sdvo_init(dev, PCH_SDVOB, true);
8509                         if (!found)
8510                                 intel_hdmi_init(dev, PCH_HDMIB, PORT_B);
8511                         if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
8512                                 intel_dp_init(dev, PCH_DP_B, PORT_B);
8513                 }
8514
8515                 if (I915_READ(PCH_HDMIC) & SDVO_DETECTED)
8516                         intel_hdmi_init(dev, PCH_HDMIC, PORT_C);
8517
8518                 if (!dpd_is_edp && I915_READ(PCH_HDMID) & SDVO_DETECTED)
8519                         intel_hdmi_init(dev, PCH_HDMID, PORT_D);
8520
8521                 if (I915_READ(PCH_DP_C) & DP_DETECTED)
8522                         intel_dp_init(dev, PCH_DP_C, PORT_C);
8523
8524                 if (I915_READ(PCH_DP_D) & DP_DETECTED)
8525                         intel_dp_init(dev, PCH_DP_D, PORT_D);
8526         } else if (IS_VALLEYVIEW(dev)) {
8527                 /* Check for built-in panel first. Shares lanes with HDMI on SDVOC */
8528                 if (I915_READ(VLV_DISPLAY_BASE + DP_C) & DP_DETECTED)
8529                         intel_dp_init(dev, VLV_DISPLAY_BASE + DP_C, PORT_C);
8530
8531                 if (I915_READ(VLV_DISPLAY_BASE + GEN4_HDMIB) & SDVO_DETECTED) {
8532                         intel_hdmi_init(dev, VLV_DISPLAY_BASE + GEN4_HDMIB,
8533                                         PORT_B);
8534                         if (I915_READ(VLV_DISPLAY_BASE + DP_B) & DP_DETECTED)
8535                                 intel_dp_init(dev, VLV_DISPLAY_BASE + DP_B, PORT_B);
8536                 }
8537         } else if (SUPPORTS_DIGITAL_OUTPUTS(dev)) {
8538                 bool found = false;
8539
8540                 if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
8541                         DRM_DEBUG_KMS("probing SDVOB\n");
8542                         found = intel_sdvo_init(dev, GEN3_SDVOB, true);
8543                         if (!found && SUPPORTS_INTEGRATED_HDMI(dev)) {
8544                                 DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
8545                                 intel_hdmi_init(dev, GEN4_HDMIB, PORT_B);
8546                         }
8547
8548                         if (!found && SUPPORTS_INTEGRATED_DP(dev)) {
8549                                 DRM_DEBUG_KMS("probing DP_B\n");
8550                                 intel_dp_init(dev, DP_B, PORT_B);
8551                         }
8552                 }
8553
8554                 /* Before G4X SDVOC doesn't have its own detect register */
8555
8556                 if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
8557                         DRM_DEBUG_KMS("probing SDVOC\n");
8558                         found = intel_sdvo_init(dev, GEN3_SDVOC, false);
8559                 }
8560
8561                 if (!found && (I915_READ(GEN3_SDVOC) & SDVO_DETECTED)) {
8562
8563                         if (SUPPORTS_INTEGRATED_HDMI(dev)) {
8564                                 DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
8565                                 intel_hdmi_init(dev, GEN4_HDMIC, PORT_C);
8566                         }
8567                         if (SUPPORTS_INTEGRATED_DP(dev)) {
8568                                 DRM_DEBUG_KMS("probing DP_C\n");
8569                                 intel_dp_init(dev, DP_C, PORT_C);
8570                         }
8571                 }
8572
8573                 if (SUPPORTS_INTEGRATED_DP(dev) &&
8574                     (I915_READ(DP_D) & DP_DETECTED)) {
8575                         DRM_DEBUG_KMS("probing DP_D\n");
8576                         intel_dp_init(dev, DP_D, PORT_D);
8577                 }
8578         } else if (IS_GEN2(dev))
8579                 intel_dvo_init(dev);
8580
8581         if (SUPPORTS_TV(dev))
8582                 intel_tv_init(dev);
8583
8584         list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
8585                 encoder->base.possible_crtcs = encoder->crtc_mask;
8586                 encoder->base.possible_clones =
8587                         intel_encoder_clones(encoder);
8588         }
8589
8590         intel_init_pch_refclk(dev);
8591
8592         drm_helper_move_panel_connectors_to_head(dev);
8593 }
8594
8595 static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
8596 {
8597         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
8598
8599         drm_framebuffer_cleanup(fb);
8600         drm_gem_object_unreference_unlocked(&intel_fb->obj->base);
8601
8602         kfree(intel_fb);
8603 }
8604
8605 static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
8606                                                 struct drm_file *file,
8607                                                 unsigned int *handle)
8608 {
8609         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
8610         struct drm_i915_gem_object *obj = intel_fb->obj;
8611
8612         return drm_gem_handle_create(file, &obj->base, handle);
8613 }
8614
8615 static const struct drm_framebuffer_funcs intel_fb_funcs = {
8616         .destroy = intel_user_framebuffer_destroy,
8617         .create_handle = intel_user_framebuffer_create_handle,
8618 };
8619
8620 int intel_framebuffer_init(struct drm_device *dev,
8621                            struct intel_framebuffer *intel_fb,
8622                            struct drm_mode_fb_cmd2 *mode_cmd,
8623                            struct drm_i915_gem_object *obj)
8624 {
8625         int ret;
8626
8627         if (obj->tiling_mode == I915_TILING_Y) {
8628                 DRM_DEBUG("hardware does not support tiling Y\n");
8629                 return -EINVAL;
8630         }
8631
8632         if (mode_cmd->pitches[0] & 63) {
8633                 DRM_DEBUG("pitch (%d) must be at least 64 byte aligned\n",
8634                           mode_cmd->pitches[0]);
8635                 return -EINVAL;
8636         }
8637
8638         /* FIXME <= Gen4 stride limits are bit unclear */
8639         if (mode_cmd->pitches[0] > 32768) {
8640                 DRM_DEBUG("pitch (%d) must be at less than 32768\n",
8641                           mode_cmd->pitches[0]);
8642                 return -EINVAL;
8643         }
8644
8645         if (obj->tiling_mode != I915_TILING_NONE &&
8646             mode_cmd->pitches[0] != obj->stride) {
8647                 DRM_DEBUG("pitch (%d) must match tiling stride (%d)\n",
8648                           mode_cmd->pitches[0], obj->stride);
8649                 return -EINVAL;
8650         }
8651
8652         /* Reject formats not supported by any plane early. */
8653         switch (mode_cmd->pixel_format) {
8654         case DRM_FORMAT_C8:
8655         case DRM_FORMAT_RGB565:
8656         case DRM_FORMAT_XRGB8888:
8657         case DRM_FORMAT_ARGB8888:
8658                 break;
8659         case DRM_FORMAT_XRGB1555:
8660         case DRM_FORMAT_ARGB1555:
8661                 if (INTEL_INFO(dev)->gen > 3) {
8662                         DRM_DEBUG("invalid format: 0x%08x\n", mode_cmd->pixel_format);
8663                         return -EINVAL;
8664                 }
8665                 break;
8666         case DRM_FORMAT_XBGR8888:
8667         case DRM_FORMAT_ABGR8888:
8668         case DRM_FORMAT_XRGB2101010:
8669         case DRM_FORMAT_ARGB2101010:
8670         case DRM_FORMAT_XBGR2101010:
8671         case DRM_FORMAT_ABGR2101010:
8672                 if (INTEL_INFO(dev)->gen < 4) {
8673                         DRM_DEBUG("invalid format: 0x%08x\n", mode_cmd->pixel_format);
8674                         return -EINVAL;
8675                 }
8676                 break;
8677         case DRM_FORMAT_YUYV:
8678         case DRM_FORMAT_UYVY:
8679         case DRM_FORMAT_YVYU:
8680         case DRM_FORMAT_VYUY:
8681                 if (INTEL_INFO(dev)->gen < 5) {
8682                         DRM_DEBUG("invalid format: 0x%08x\n", mode_cmd->pixel_format);
8683                         return -EINVAL;
8684                 }
8685                 break;
8686         default:
8687                 DRM_DEBUG("unsupported pixel format 0x%08x\n", mode_cmd->pixel_format);
8688                 return -EINVAL;
8689         }
8690
8691         /* FIXME need to adjust LINOFF/TILEOFF accordingly. */
8692         if (mode_cmd->offsets[0] != 0)
8693                 return -EINVAL;
8694
8695         drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
8696         intel_fb->obj = obj;
8697
8698         ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
8699         if (ret) {
8700                 DRM_ERROR("framebuffer init failed %d\n", ret);
8701                 return ret;
8702         }
8703
8704         return 0;
8705 }
8706
8707 static struct drm_framebuffer *
8708 intel_user_framebuffer_create(struct drm_device *dev,
8709                               struct drm_file *filp,
8710                               struct drm_mode_fb_cmd2 *mode_cmd)
8711 {
8712         struct drm_i915_gem_object *obj;
8713
8714         obj = to_intel_bo(drm_gem_object_lookup(dev, filp,
8715                                                 mode_cmd->handles[0]));
8716         if (&obj->base == NULL)
8717                 return ERR_PTR(-ENOENT);
8718
8719         return intel_framebuffer_create(dev, mode_cmd, obj);
8720 }
8721
8722 static const struct drm_mode_config_funcs intel_mode_funcs = {
8723         .fb_create = intel_user_framebuffer_create,
8724         .output_poll_changed = intel_fb_output_poll_changed,
8725 };
8726
8727 /* Set up chip specific display functions */
8728 static void intel_init_display(struct drm_device *dev)
8729 {
8730         struct drm_i915_private *dev_priv = dev->dev_private;
8731
8732         if (HAS_DDI(dev)) {
8733                 dev_priv->display.get_pipe_config = haswell_get_pipe_config;
8734                 dev_priv->display.crtc_mode_set = haswell_crtc_mode_set;
8735                 dev_priv->display.crtc_enable = haswell_crtc_enable;
8736                 dev_priv->display.crtc_disable = haswell_crtc_disable;
8737                 dev_priv->display.off = haswell_crtc_off;
8738                 dev_priv->display.update_plane = ironlake_update_plane;
8739         } else if (HAS_PCH_SPLIT(dev)) {
8740                 dev_priv->display.get_pipe_config = ironlake_get_pipe_config;
8741                 dev_priv->display.crtc_mode_set = ironlake_crtc_mode_set;
8742                 dev_priv->display.crtc_enable = ironlake_crtc_enable;
8743                 dev_priv->display.crtc_disable = ironlake_crtc_disable;
8744                 dev_priv->display.off = ironlake_crtc_off;
8745                 dev_priv->display.update_plane = ironlake_update_plane;
8746         } else {
8747                 dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
8748                 dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
8749                 dev_priv->display.crtc_enable = i9xx_crtc_enable;
8750                 dev_priv->display.crtc_disable = i9xx_crtc_disable;
8751                 dev_priv->display.off = i9xx_crtc_off;
8752                 dev_priv->display.update_plane = i9xx_update_plane;
8753         }
8754
8755         /* Returns the core display clock speed */
8756         if (IS_VALLEYVIEW(dev))
8757                 dev_priv->display.get_display_clock_speed =
8758                         valleyview_get_display_clock_speed;
8759         else if (IS_I945G(dev) || (IS_G33(dev) && !IS_PINEVIEW_M(dev)))
8760                 dev_priv->display.get_display_clock_speed =
8761                         i945_get_display_clock_speed;
8762         else if (IS_I915G(dev))
8763                 dev_priv->display.get_display_clock_speed =
8764                         i915_get_display_clock_speed;
8765         else if (IS_I945GM(dev) || IS_845G(dev) || IS_PINEVIEW_M(dev))
8766                 dev_priv->display.get_display_clock_speed =
8767                         i9xx_misc_get_display_clock_speed;
8768         else if (IS_I915GM(dev))
8769                 dev_priv->display.get_display_clock_speed =
8770                         i915gm_get_display_clock_speed;
8771         else if (IS_I865G(dev))
8772                 dev_priv->display.get_display_clock_speed =
8773                         i865_get_display_clock_speed;
8774         else if (IS_I85X(dev))
8775                 dev_priv->display.get_display_clock_speed =
8776                         i855_get_display_clock_speed;
8777         else /* 852, 830 */
8778                 dev_priv->display.get_display_clock_speed =
8779                         i830_get_display_clock_speed;
8780
8781         if (HAS_PCH_SPLIT(dev)) {
8782                 if (IS_GEN5(dev)) {
8783                         dev_priv->display.fdi_link_train = ironlake_fdi_link_train;
8784                         dev_priv->display.write_eld = ironlake_write_eld;
8785                 } else if (IS_GEN6(dev)) {
8786                         dev_priv->display.fdi_link_train = gen6_fdi_link_train;
8787                         dev_priv->display.write_eld = ironlake_write_eld;
8788                 } else if (IS_IVYBRIDGE(dev)) {
8789                         /* FIXME: detect B0+ stepping and use auto training */
8790                         dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
8791                         dev_priv->display.write_eld = ironlake_write_eld;
8792                         dev_priv->display.modeset_global_resources =
8793                                 ivb_modeset_global_resources;
8794                 } else if (IS_HASWELL(dev)) {
8795                         dev_priv->display.fdi_link_train = hsw_fdi_link_train;
8796                         dev_priv->display.write_eld = haswell_write_eld;
8797                         dev_priv->display.modeset_global_resources =
8798                                 haswell_modeset_global_resources;
8799                 }
8800         } else if (IS_G4X(dev)) {
8801                 dev_priv->display.write_eld = g4x_write_eld;
8802         }
8803
8804         /* Default just returns -ENODEV to indicate unsupported */
8805         dev_priv->display.queue_flip = intel_default_queue_flip;
8806
8807         switch (INTEL_INFO(dev)->gen) {
8808         case 2:
8809                 dev_priv->display.queue_flip = intel_gen2_queue_flip;
8810                 break;
8811
8812         case 3:
8813                 dev_priv->display.queue_flip = intel_gen3_queue_flip;
8814                 break;
8815
8816         case 4:
8817         case 5:
8818                 dev_priv->display.queue_flip = intel_gen4_queue_flip;
8819                 break;
8820
8821         case 6:
8822                 dev_priv->display.queue_flip = intel_gen6_queue_flip;
8823                 break;
8824         case 7:
8825                 dev_priv->display.queue_flip = intel_gen7_queue_flip;
8826                 break;
8827         }
8828 }
8829
8830 /*
8831  * Some BIOSes insist on assuming the GPU's pipe A is enabled at suspend,
8832  * resume, or other times.  This quirk makes sure that's the case for
8833  * affected systems.
8834  */
8835 static void quirk_pipea_force(struct drm_device *dev)
8836 {
8837         struct drm_i915_private *dev_priv = dev->dev_private;
8838
8839         dev_priv->quirks |= QUIRK_PIPEA_FORCE;
8840         DRM_INFO("applying pipe a force quirk\n");
8841 }
8842
8843 /*
8844  * Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
8845  */
8846 static void quirk_ssc_force_disable(struct drm_device *dev)
8847 {
8848         struct drm_i915_private *dev_priv = dev->dev_private;
8849         dev_priv->quirks |= QUIRK_LVDS_SSC_DISABLE;
8850         DRM_INFO("applying lvds SSC disable quirk\n");
8851 }
8852
8853 /*
8854  * A machine (e.g. Acer Aspire 5734Z) may need to invert the panel backlight
8855  * brightness value
8856  */
8857 static void quirk_invert_brightness(struct drm_device *dev)
8858 {
8859         struct drm_i915_private *dev_priv = dev->dev_private;
8860         dev_priv->quirks |= QUIRK_INVERT_BRIGHTNESS;
8861         DRM_INFO("applying inverted panel brightness quirk\n");
8862 }
8863
8864 struct intel_quirk {
8865         int device;
8866         int subsystem_vendor;
8867         int subsystem_device;
8868         void (*hook)(struct drm_device *dev);
8869 };
8870
8871 /* For systems that don't have a meaningful PCI subdevice/subvendor ID */
8872 struct intel_dmi_quirk {
8873         void (*hook)(struct drm_device *dev);
8874         const struct dmi_system_id (*dmi_id_list)[];
8875 };
8876
8877 static int intel_dmi_reverse_brightness(const struct dmi_system_id *id)
8878 {
8879         DRM_INFO("Backlight polarity reversed on %s\n", id->ident);
8880         return 1;
8881 }
8882
8883 static const struct intel_dmi_quirk intel_dmi_quirks[] = {
8884         {
8885                 .dmi_id_list = &(const struct dmi_system_id[]) {
8886                         {
8887                                 .callback = intel_dmi_reverse_brightness,
8888                                 .ident = "NCR Corporation",
8889                                 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "NCR Corporation"),
8890                                             DMI_MATCH(DMI_PRODUCT_NAME, ""),
8891                                 },
8892                         },
8893                         { }  /* terminating entry */
8894                 },
8895                 .hook = quirk_invert_brightness,
8896         },
8897 };
8898
8899 static struct intel_quirk intel_quirks[] = {
8900         /* HP Mini needs pipe A force quirk (LP: #322104) */
8901         { 0x27ae, 0x103c, 0x361a, quirk_pipea_force },
8902
8903         /* Toshiba Protege R-205, S-209 needs pipe A force quirk */
8904         { 0x2592, 0x1179, 0x0001, quirk_pipea_force },
8905
8906         /* ThinkPad T60 needs pipe A force quirk (bug #16494) */
8907         { 0x2782, 0x17aa, 0x201a, quirk_pipea_force },
8908
8909         /* 830/845 need to leave pipe A & dpll A up */
8910         { 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
8911         { 0x3577, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
8912
8913         /* Lenovo U160 cannot use SSC on LVDS */
8914         { 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },
8915
8916         /* Sony Vaio Y cannot use SSC on LVDS */
8917         { 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },
8918
8919         /* Acer Aspire 5734Z must invert backlight brightness */
8920         { 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
8921
8922         /* Acer/eMachines G725 */
8923         { 0x2a42, 0x1025, 0x0210, quirk_invert_brightness },
8924
8925         /* Acer/eMachines e725 */
8926         { 0x2a42, 0x1025, 0x0212, quirk_invert_brightness },
8927
8928         /* Acer/Packard Bell NCL20 */
8929         { 0x2a42, 0x1025, 0x034b, quirk_invert_brightness },
8930
8931         /* Acer Aspire 4736Z */
8932         { 0x2a42, 0x1025, 0x0260, quirk_invert_brightness },
8933 };
8934
8935 static void intel_init_quirks(struct drm_device *dev)
8936 {
8937         struct pci_dev *d = dev->pdev;
8938         int i;
8939
8940         for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
8941                 struct intel_quirk *q = &intel_quirks[i];
8942
8943                 if (d->device == q->device &&
8944                     (d->subsystem_vendor == q->subsystem_vendor ||
8945                      q->subsystem_vendor == PCI_ANY_ID) &&
8946                     (d->subsystem_device == q->subsystem_device ||
8947                      q->subsystem_device == PCI_ANY_ID))
8948                         q->hook(dev);
8949         }
8950         for (i = 0; i < ARRAY_SIZE(intel_dmi_quirks); i++) {
8951                 if (dmi_check_system(*intel_dmi_quirks[i].dmi_id_list) != 0)
8952                         intel_dmi_quirks[i].hook(dev);
8953         }
8954 }
8955
8956 /* Disable the VGA plane that we never use */
8957 static void i915_disable_vga(struct drm_device *dev)
8958 {
8959         struct drm_i915_private *dev_priv = dev->dev_private;
8960         u8 sr1;
8961         u32 vga_reg = i915_vgacntrl_reg(dev);
8962
8963         vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
8964         outb(SR01, VGA_SR_INDEX);
8965         sr1 = inb(VGA_SR_DATA);
8966         outb(sr1 | 1<<5, VGA_SR_DATA);
8967         vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
8968         udelay(300);
8969
8970         I915_WRITE(vga_reg, VGA_DISP_DISABLE);
8971         POSTING_READ(vga_reg);
8972 }
8973
8974 void intel_modeset_init_hw(struct drm_device *dev)
8975 {
8976         intel_init_power_well(dev);
8977
8978         intel_prepare_ddi(dev);
8979
8980         intel_init_clock_gating(dev);
8981
8982         mutex_lock(&dev->struct_mutex);
8983         intel_enable_gt_powersave(dev);
8984         mutex_unlock(&dev->struct_mutex);
8985 }
8986
8987 void intel_modeset_init(struct drm_device *dev)
8988 {
8989         struct drm_i915_private *dev_priv = dev->dev_private;
8990         int i, j, ret;
8991
8992         drm_mode_config_init(dev);
8993
8994         dev->mode_config.min_width = 0;
8995         dev->mode_config.min_height = 0;
8996
8997         dev->mode_config.preferred_depth = 24;
8998         dev->mode_config.prefer_shadow = 1;
8999
9000         dev->mode_config.funcs = &intel_mode_funcs;
9001
9002         intel_init_quirks(dev);
9003
9004         intel_init_pm(dev);
9005
9006         if (INTEL_INFO(dev)->num_pipes == 0)
9007                 return;
9008
9009         intel_init_display(dev);
9010
9011         if (IS_GEN2(dev)) {
9012                 dev->mode_config.max_width = 2048;
9013                 dev->mode_config.max_height = 2048;
9014         } else if (IS_GEN3(dev)) {
9015                 dev->mode_config.max_width = 4096;
9016                 dev->mode_config.max_height = 4096;
9017         } else {
9018                 dev->mode_config.max_width = 8192;
9019                 dev->mode_config.max_height = 8192;
9020         }
9021         dev->mode_config.fb_base = dev_priv->gtt.mappable_base;
9022
9023         DRM_DEBUG_KMS("%d display pipe%s available.\n",
9024                       INTEL_INFO(dev)->num_pipes,
9025                       INTEL_INFO(dev)->num_pipes > 1 ? "s" : "");
9026
9027         for (i = 0; i < INTEL_INFO(dev)->num_pipes; i++) {
9028                 intel_crtc_init(dev, i);
9029                 for (j = 0; j < dev_priv->num_plane; j++) {
9030                         ret = intel_plane_init(dev, i, j);
9031                         if (ret)
9032                                 DRM_DEBUG_KMS("pipe %d plane %d init failed: %d\n",
9033                                               i, j, ret);
9034                 }
9035         }
9036
9037         intel_cpu_pll_init(dev);
9038         intel_pch_pll_init(dev);
9039
9040         /* Just disable it once at startup */
9041         i915_disable_vga(dev);
9042         intel_setup_outputs(dev);
9043
9044         /* Just in case the BIOS is doing something questionable. */
9045         intel_disable_fbc(dev);
9046 }
9047
9048 static void
9049 intel_connector_break_all_links(struct intel_connector *connector)
9050 {
9051         connector->base.dpms = DRM_MODE_DPMS_OFF;
9052         connector->base.encoder = NULL;
9053         connector->encoder->connectors_active = false;
9054         connector->encoder->base.crtc = NULL;
9055 }
9056
9057 static void intel_enable_pipe_a(struct drm_device *dev)
9058 {
9059         struct intel_connector *connector;
9060         struct drm_connector *crt = NULL;
9061         struct intel_load_detect_pipe load_detect_temp;
9062
9063         /* We can't just switch on the pipe A, we need to set things up with a
9064          * proper mode and output configuration. As a gross hack, enable pipe A
9065          * by enabling the load detect pipe once. */
9066         list_for_each_entry(connector,
9067                             &dev->mode_config.connector_list,
9068                             base.head) {
9069                 if (connector->encoder->type == INTEL_OUTPUT_ANALOG) {
9070                         crt = &connector->base;
9071                         break;
9072                 }
9073         }
9074
9075         if (!crt)
9076                 return;
9077
9078         if (intel_get_load_detect_pipe(crt, NULL, &load_detect_temp))
9079                 intel_release_load_detect_pipe(crt, &load_detect_temp);
9080
9081
9082 }
9083
9084 static bool
9085 intel_check_plane_mapping(struct intel_crtc *crtc)
9086 {
9087         struct drm_device *dev = crtc->base.dev;
9088         struct drm_i915_private *dev_priv = dev->dev_private;
9089         u32 reg, val;
9090
9091         if (INTEL_INFO(dev)->num_pipes == 1)
9092                 return true;
9093
9094         reg = DSPCNTR(!crtc->plane);
9095         val = I915_READ(reg);
9096
9097         if ((val & DISPLAY_PLANE_ENABLE) &&
9098             (!!(val & DISPPLANE_SEL_PIPE_MASK) == crtc->pipe))
9099                 return false;
9100
9101         return true;
9102 }
9103
9104 static void intel_sanitize_crtc(struct intel_crtc *crtc)
9105 {
9106         struct drm_device *dev = crtc->base.dev;
9107         struct drm_i915_private *dev_priv = dev->dev_private;
9108         u32 reg;
9109
9110         /* Clear any frame start delays used for debugging left by the BIOS */
9111         reg = PIPECONF(crtc->cpu_transcoder);
9112         I915_WRITE(reg, I915_READ(reg) & ~PIPECONF_FRAME_START_DELAY_MASK);
9113
9114         /* We need to sanitize the plane -> pipe mapping first because this will
9115          * disable the crtc (and hence change the state) if it is wrong. Note
9116          * that gen4+ has a fixed plane -> pipe mapping.  */
9117         if (INTEL_INFO(dev)->gen < 4 && !intel_check_plane_mapping(crtc)) {
9118                 struct intel_connector *connector;
9119                 bool plane;
9120
9121                 DRM_DEBUG_KMS("[CRTC:%d] wrong plane connection detected!\n",
9122                               crtc->base.base.id);
9123
9124                 /* Pipe has the wrong plane attached and the plane is active.
9125                  * Temporarily change the plane mapping and disable everything
9126                  * ...  */
9127                 plane = crtc->plane;
9128                 crtc->plane = !plane;
9129                 dev_priv->display.crtc_disable(&crtc->base);
9130                 crtc->plane = plane;
9131
9132                 /* ... and break all links. */
9133                 list_for_each_entry(connector, &dev->mode_config.connector_list,
9134                                     base.head) {
9135                         if (connector->encoder->base.crtc != &crtc->base)
9136                                 continue;
9137
9138                         intel_connector_break_all_links(connector);
9139                 }
9140
9141                 WARN_ON(crtc->active);
9142                 crtc->base.enabled = false;
9143         }
9144
9145         if (dev_priv->quirks & QUIRK_PIPEA_FORCE &&
9146             crtc->pipe == PIPE_A && !crtc->active) {
9147                 /* BIOS forgot to enable pipe A, this mostly happens after
9148                  * resume. Force-enable the pipe to fix this, the update_dpms
9149                  * call below we restore the pipe to the right state, but leave
9150                  * the required bits on. */
9151                 intel_enable_pipe_a(dev);
9152         }
9153
9154         /* Adjust the state of the output pipe according to whether we
9155          * have active connectors/encoders. */
9156         intel_crtc_update_dpms(&crtc->base);
9157
9158         if (crtc->active != crtc->base.enabled) {
9159                 struct intel_encoder *encoder;
9160
9161                 /* This can happen either due to bugs in the get_hw_state
9162                  * functions or because the pipe is force-enabled due to the
9163                  * pipe A quirk. */
9164                 DRM_DEBUG_KMS("[CRTC:%d] hw state adjusted, was %s, now %s\n",
9165                               crtc->base.base.id,
9166                               crtc->base.enabled ? "enabled" : "disabled",
9167                               crtc->active ? "enabled" : "disabled");
9168
9169                 crtc->base.enabled = crtc->active;
9170
9171                 /* Because we only establish the connector -> encoder ->
9172                  * crtc links if something is active, this means the
9173                  * crtc is now deactivated. Break the links. connector
9174                  * -> encoder links are only establish when things are
9175                  *  actually up, hence no need to break them. */
9176                 WARN_ON(crtc->active);
9177
9178                 for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
9179                         WARN_ON(encoder->connectors_active);
9180                         encoder->base.crtc = NULL;
9181                 }
9182         }
9183 }
9184
9185 static void intel_sanitize_encoder(struct intel_encoder *encoder)
9186 {
9187         struct intel_connector *connector;
9188         struct drm_device *dev = encoder->base.dev;
9189
9190         /* We need to check both for a crtc link (meaning that the
9191          * encoder is active and trying to read from a pipe) and the
9192          * pipe itself being active. */
9193         bool has_active_crtc = encoder->base.crtc &&
9194                 to_intel_crtc(encoder->base.crtc)->active;
9195
9196         if (encoder->connectors_active && !has_active_crtc) {
9197                 DRM_DEBUG_KMS("[ENCODER:%d:%s] has active connectors but no active pipe!\n",
9198                               encoder->base.base.id,
9199                               drm_get_encoder_name(&encoder->base));
9200
9201                 /* Connector is active, but has no active pipe. This is
9202                  * fallout from our resume register restoring. Disable
9203                  * the encoder manually again. */
9204                 if (encoder->base.crtc) {
9205                         DRM_DEBUG_KMS("[ENCODER:%d:%s] manually disabled\n",
9206                                       encoder->base.base.id,
9207                                       drm_get_encoder_name(&encoder->base));
9208                         encoder->disable(encoder);
9209                 }
9210
9211                 /* Inconsistent output/port/pipe state happens presumably due to
9212                  * a bug in one of the get_hw_state functions. Or someplace else
9213                  * in our code, like the register restore mess on resume. Clamp
9214                  * things to off as a safer default. */
9215                 list_for_each_entry(connector,
9216                                     &dev->mode_config.connector_list,
9217                                     base.head) {
9218                         if (connector->encoder != encoder)
9219                                 continue;
9220
9221                         intel_connector_break_all_links(connector);
9222                 }
9223         }
9224         /* Enabled encoders without active connectors will be fixed in
9225          * the crtc fixup. */
9226 }
9227
9228 void i915_redisable_vga(struct drm_device *dev)
9229 {
9230         struct drm_i915_private *dev_priv = dev->dev_private;
9231         u32 vga_reg = i915_vgacntrl_reg(dev);
9232
9233         if (I915_READ(vga_reg) != VGA_DISP_DISABLE) {
9234                 DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
9235                 i915_disable_vga(dev);
9236         }
9237 }
9238
9239 /* Scan out the current hw modeset state, sanitizes it and maps it into the drm
9240  * and i915 state tracking structures. */
9241 void intel_modeset_setup_hw_state(struct drm_device *dev,
9242                                   bool force_restore)
9243 {
9244         struct drm_i915_private *dev_priv = dev->dev_private;
9245         enum pipe pipe;
9246         u32 tmp;
9247         struct drm_plane *plane;
9248         struct intel_crtc *crtc;
9249         struct intel_encoder *encoder;
9250         struct intel_connector *connector;
9251
9252         if (HAS_DDI(dev)) {
9253                 tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
9254
9255                 if (tmp & TRANS_DDI_FUNC_ENABLE) {
9256                         switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
9257                         case TRANS_DDI_EDP_INPUT_A_ON:
9258                         case TRANS_DDI_EDP_INPUT_A_ONOFF:
9259                                 pipe = PIPE_A;
9260                                 break;
9261                         case TRANS_DDI_EDP_INPUT_B_ONOFF:
9262                                 pipe = PIPE_B;
9263                                 break;
9264                         case TRANS_DDI_EDP_INPUT_C_ONOFF:
9265                                 pipe = PIPE_C;
9266                                 break;
9267                         default:
9268                                 /* A bogus value has been programmed, disable
9269                                  * the transcoder */
9270                                 WARN(1, "Bogus eDP source %08x\n", tmp);
9271                                 intel_ddi_disable_transcoder_func(dev_priv,
9272                                                 TRANSCODER_EDP);
9273                                 goto setup_pipes;
9274                         }
9275
9276                         crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
9277                         crtc->cpu_transcoder = TRANSCODER_EDP;
9278
9279                         DRM_DEBUG_KMS("Pipe %c using transcoder EDP\n",
9280                                       pipe_name(pipe));
9281                 }
9282         }
9283
9284 setup_pipes:
9285         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
9286                             base.head) {
9287                 memset(&crtc->config, 0, sizeof(crtc->config));
9288                 crtc->active = dev_priv->display.get_pipe_config(crtc,
9289                                                                  &crtc->config);
9290
9291                 crtc->base.enabled = crtc->active;
9292
9293                 DRM_DEBUG_KMS("[CRTC:%d] hw state readout: %s\n",
9294                               crtc->base.base.id,
9295                               crtc->active ? "enabled" : "disabled");
9296         }
9297
9298         if (HAS_DDI(dev))
9299                 intel_ddi_setup_hw_pll_state(dev);
9300
9301         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
9302                             base.head) {
9303                 pipe = 0;
9304
9305                 if (encoder->get_hw_state(encoder, &pipe)) {
9306                         encoder->base.crtc =
9307                                 dev_priv->pipe_to_crtc_mapping[pipe];
9308                 } else {
9309                         encoder->base.crtc = NULL;
9310                 }
9311
9312                 encoder->connectors_active = false;
9313                 DRM_DEBUG_KMS("[ENCODER:%d:%s] hw state readout: %s, pipe=%i\n",
9314                               encoder->base.base.id,
9315                               drm_get_encoder_name(&encoder->base),
9316                               encoder->base.crtc ? "enabled" : "disabled",
9317                               pipe);
9318         }
9319
9320         list_for_each_entry(connector, &dev->mode_config.connector_list,
9321                             base.head) {
9322                 if (connector->get_hw_state(connector)) {
9323                         connector->base.dpms = DRM_MODE_DPMS_ON;
9324                         connector->encoder->connectors_active = true;
9325                         connector->base.encoder = &connector->encoder->base;
9326                 } else {
9327                         connector->base.dpms = DRM_MODE_DPMS_OFF;
9328                         connector->base.encoder = NULL;
9329                 }
9330                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] hw state readout: %s\n",
9331                               connector->base.base.id,
9332                               drm_get_connector_name(&connector->base),
9333                               connector->base.encoder ? "enabled" : "disabled");
9334         }
9335
9336         /* HW state is read out, now we need to sanitize this mess. */
9337         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
9338                             base.head) {
9339                 intel_sanitize_encoder(encoder);
9340         }
9341
9342         for_each_pipe(pipe) {
9343                 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
9344                 intel_sanitize_crtc(crtc);
9345         }
9346
9347         if (force_restore) {
9348                 /*
9349                  * We need to use raw interfaces for restoring state to avoid
9350                  * checking (bogus) intermediate states.
9351                  */
9352                 for_each_pipe(pipe) {
9353                         struct drm_crtc *crtc =
9354                                 dev_priv->pipe_to_crtc_mapping[pipe];
9355
9356                         __intel_set_mode(crtc, &crtc->mode, crtc->x, crtc->y,
9357                                          crtc->fb);
9358                 }
9359                 list_for_each_entry(plane, &dev->mode_config.plane_list, head)
9360                         intel_plane_restore(plane);
9361
9362                 i915_redisable_vga(dev);
9363         } else {
9364                 intel_modeset_update_staged_output_state(dev);
9365         }
9366
9367         intel_modeset_check_state(dev);
9368
9369         drm_mode_config_reset(dev);
9370 }
9371
9372 void intel_modeset_gem_init(struct drm_device *dev)
9373 {
9374         intel_modeset_init_hw(dev);
9375
9376         intel_setup_overlay(dev);
9377
9378         intel_modeset_setup_hw_state(dev, false);
9379 }
9380
9381 void intel_modeset_cleanup(struct drm_device *dev)
9382 {
9383         struct drm_i915_private *dev_priv = dev->dev_private;
9384         struct drm_crtc *crtc;
9385         struct intel_crtc *intel_crtc;
9386
9387         drm_kms_helper_poll_fini(dev);
9388         mutex_lock(&dev->struct_mutex);
9389
9390         intel_unregister_dsm_handler();
9391
9392
9393         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
9394                 /* Skip inactive CRTCs */
9395                 if (!crtc->fb)
9396                         continue;
9397
9398                 intel_crtc = to_intel_crtc(crtc);
9399                 intel_increase_pllclock(crtc);
9400         }
9401
9402         intel_disable_fbc(dev);
9403
9404         intel_disable_gt_powersave(dev);
9405
9406         ironlake_teardown_rc6(dev);
9407
9408         if (IS_VALLEYVIEW(dev))
9409                 vlv_init_dpio(dev);
9410
9411         mutex_unlock(&dev->struct_mutex);
9412
9413         /* Disable the irq before mode object teardown, for the irq might
9414          * enqueue unpin/hotplug work. */
9415         drm_irq_uninstall(dev);
9416         cancel_work_sync(&dev_priv->hotplug_work);
9417         cancel_work_sync(&dev_priv->rps.work);
9418
9419         /* flush any delayed tasks or pending work */
9420         flush_scheduled_work();
9421
9422         drm_mode_config_cleanup(dev);
9423
9424         intel_cleanup_overlay(dev);
9425 }
9426
9427 /*
9428  * Return which encoder is currently attached for connector.
9429  */
9430 struct drm_encoder *intel_best_encoder(struct drm_connector *connector)
9431 {
9432         return &intel_attached_encoder(connector)->base;
9433 }
9434
9435 void intel_connector_attach_encoder(struct intel_connector *connector,
9436                                     struct intel_encoder *encoder)
9437 {
9438         connector->encoder = encoder;
9439         drm_mode_connector_attach_encoder(&connector->base,
9440                                           &encoder->base);
9441 }
9442
9443 /*
9444  * set vga decode state - true == enable VGA decode
9445  */
9446 int intel_modeset_vga_set_state(struct drm_device *dev, bool state)
9447 {
9448         struct drm_i915_private *dev_priv = dev->dev_private;
9449         u16 gmch_ctrl;
9450
9451         pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &gmch_ctrl);
9452         if (state)
9453                 gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
9454         else
9455                 gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
9456         pci_write_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, gmch_ctrl);
9457         return 0;
9458 }
9459
9460 #ifdef CONFIG_DEBUG_FS
9461 #include <linux/seq_file.h>
9462
9463 struct intel_display_error_state {
9464         struct intel_cursor_error_state {
9465                 u32 control;
9466                 u32 position;
9467                 u32 base;
9468                 u32 size;
9469         } cursor[I915_MAX_PIPES];
9470
9471         struct intel_pipe_error_state {
9472                 u32 conf;
9473                 u32 source;
9474
9475                 u32 htotal;
9476                 u32 hblank;
9477                 u32 hsync;
9478                 u32 vtotal;
9479                 u32 vblank;
9480                 u32 vsync;
9481         } pipe[I915_MAX_PIPES];
9482
9483         struct intel_plane_error_state {
9484                 u32 control;
9485                 u32 stride;
9486                 u32 size;
9487                 u32 pos;
9488                 u32 addr;
9489                 u32 surface;
9490                 u32 tile_offset;
9491         } plane[I915_MAX_PIPES];
9492 };
9493
9494 struct intel_display_error_state *
9495 intel_display_capture_error_state(struct drm_device *dev)
9496 {
9497         drm_i915_private_t *dev_priv = dev->dev_private;
9498         struct intel_display_error_state *error;
9499         enum transcoder cpu_transcoder;
9500         int i;
9501
9502         error = kmalloc(sizeof(*error), GFP_ATOMIC);
9503         if (error == NULL)
9504                 return NULL;
9505
9506         for_each_pipe(i) {
9507                 cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv, i);
9508
9509                 if (INTEL_INFO(dev)->gen <= 6 || IS_VALLEYVIEW(dev)) {
9510                         error->cursor[i].control = I915_READ(CURCNTR(i));
9511                         error->cursor[i].position = I915_READ(CURPOS(i));
9512                         error->cursor[i].base = I915_READ(CURBASE(i));
9513                 } else {
9514                         error->cursor[i].control = I915_READ(CURCNTR_IVB(i));
9515                         error->cursor[i].position = I915_READ(CURPOS_IVB(i));
9516                         error->cursor[i].base = I915_READ(CURBASE_IVB(i));
9517                 }
9518
9519                 error->plane[i].control = I915_READ(DSPCNTR(i));
9520                 error->plane[i].stride = I915_READ(DSPSTRIDE(i));
9521                 if (INTEL_INFO(dev)->gen <= 3) {
9522                         error->plane[i].size = I915_READ(DSPSIZE(i));
9523                         error->plane[i].pos = I915_READ(DSPPOS(i));
9524                 }
9525                 if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
9526                         error->plane[i].addr = I915_READ(DSPADDR(i));
9527                 if (INTEL_INFO(dev)->gen >= 4) {
9528                         error->plane[i].surface = I915_READ(DSPSURF(i));
9529                         error->plane[i].tile_offset = I915_READ(DSPTILEOFF(i));
9530                 }
9531
9532                 error->pipe[i].conf = I915_READ(PIPECONF(cpu_transcoder));
9533                 error->pipe[i].source = I915_READ(PIPESRC(i));
9534                 error->pipe[i].htotal = I915_READ(HTOTAL(cpu_transcoder));
9535                 error->pipe[i].hblank = I915_READ(HBLANK(cpu_transcoder));
9536                 error->pipe[i].hsync = I915_READ(HSYNC(cpu_transcoder));
9537                 error->pipe[i].vtotal = I915_READ(VTOTAL(cpu_transcoder));
9538                 error->pipe[i].vblank = I915_READ(VBLANK(cpu_transcoder));
9539                 error->pipe[i].vsync = I915_READ(VSYNC(cpu_transcoder));
9540         }
9541
9542         return error;
9543 }
9544
9545 void
9546 intel_display_print_error_state(struct seq_file *m,
9547                                 struct drm_device *dev,
9548                                 struct intel_display_error_state *error)
9549 {
9550         int i;
9551
9552         seq_printf(m, "Num Pipes: %d\n", INTEL_INFO(dev)->num_pipes);
9553         for_each_pipe(i) {
9554                 seq_printf(m, "Pipe [%d]:\n", i);
9555                 seq_printf(m, "  CONF: %08x\n", error->pipe[i].conf);
9556                 seq_printf(m, "  SRC: %08x\n", error->pipe[i].source);
9557                 seq_printf(m, "  HTOTAL: %08x\n", error->pipe[i].htotal);
9558                 seq_printf(m, "  HBLANK: %08x\n", error->pipe[i].hblank);
9559                 seq_printf(m, "  HSYNC: %08x\n", error->pipe[i].hsync);
9560                 seq_printf(m, "  VTOTAL: %08x\n", error->pipe[i].vtotal);
9561                 seq_printf(m, "  VBLANK: %08x\n", error->pipe[i].vblank);
9562                 seq_printf(m, "  VSYNC: %08x\n", error->pipe[i].vsync);
9563
9564                 seq_printf(m, "Plane [%d]:\n", i);
9565                 seq_printf(m, "  CNTR: %08x\n", error->plane[i].control);
9566                 seq_printf(m, "  STRIDE: %08x\n", error->plane[i].stride);
9567                 if (INTEL_INFO(dev)->gen <= 3) {
9568                         seq_printf(m, "  SIZE: %08x\n", error->plane[i].size);
9569                         seq_printf(m, "  POS: %08x\n", error->plane[i].pos);
9570                 }
9571                 if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
9572                         seq_printf(m, "  ADDR: %08x\n", error->plane[i].addr);
9573                 if (INTEL_INFO(dev)->gen >= 4) {
9574                         seq_printf(m, "  SURF: %08x\n", error->plane[i].surface);
9575                         seq_printf(m, "  TILEOFF: %08x\n", error->plane[i].tile_offset);
9576                 }
9577
9578                 seq_printf(m, "Cursor [%d]:\n", i);
9579                 seq_printf(m, "  CNTR: %08x\n", error->cursor[i].control);
9580                 seq_printf(m, "  POS: %08x\n", error->cursor[i].position);
9581                 seq_printf(m, "  BASE: %08x\n", error->cursor[i].base);
9582         }
9583 }
9584 #endif