2 * Copyright © 2007 David Airlie
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:
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
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.
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/errno.h>
30 #include <linux/string.h>
32 #include <linux/tty.h>
33 #include <linux/sysrq.h>
34 #include <linux/delay.h>
36 #include <linux/init.h>
37 #include <linux/vga_switcheroo.h>
40 #include <drm/drm_crtc.h>
41 #include <drm/drm_fb_helper.h>
42 #include "intel_drv.h"
43 #include <drm/i915_drm.h>
46 static struct fb_ops intelfb_ops = {
48 .fb_check_var = drm_fb_helper_check_var,
49 .fb_set_par = drm_fb_helper_set_par,
50 .fb_fillrect = cfb_fillrect,
51 .fb_copyarea = cfb_copyarea,
52 .fb_imageblit = cfb_imageblit,
53 .fb_pan_display = drm_fb_helper_pan_display,
54 .fb_blank = drm_fb_helper_blank,
55 .fb_setcmap = drm_fb_helper_setcmap,
56 .fb_debug_enter = drm_fb_helper_debug_enter,
57 .fb_debug_leave = drm_fb_helper_debug_leave,
60 static int intelfb_create(struct intel_fbdev *ifbdev,
61 struct drm_fb_helper_surface_size *sizes)
63 struct drm_device *dev = ifbdev->helper.dev;
64 struct drm_i915_private *dev_priv = dev->dev_private;
66 struct drm_framebuffer *fb;
67 struct drm_mode_fb_cmd2 mode_cmd = {};
68 struct drm_i915_gem_object *obj;
69 struct device *device = &dev->pdev->dev;
72 /* we don't do packed 24bpp */
73 if (sizes->surface_bpp == 24)
74 sizes->surface_bpp = 32;
76 mode_cmd.width = sizes->surface_width;
77 mode_cmd.height = sizes->surface_height;
79 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((sizes->surface_bpp + 7) /
81 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
82 sizes->surface_depth);
84 size = mode_cmd.pitches[0] * mode_cmd.height;
85 size = ALIGN(size, PAGE_SIZE);
86 obj = i915_gem_object_create_stolen(dev, size);
88 obj = i915_gem_alloc_object(dev, size);
90 DRM_ERROR("failed to allocate framebuffer\n");
95 mutex_lock(&dev->struct_mutex);
97 /* Flush everything out, we'll be doing GTT only from now on */
98 ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
100 DRM_ERROR("failed to pin fb: %d\n", ret);
104 info = framebuffer_alloc(0, device);
112 ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
116 fb = &ifbdev->ifb.base;
118 ifbdev->helper.fb = fb;
119 ifbdev->helper.fbdev = info;
121 strcpy(info->fix.id, "inteldrmfb");
123 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
124 info->fbops = &intelfb_ops;
126 ret = fb_alloc_cmap(&info->cmap, 256, 0);
131 /* setup aperture base/size for vesafb takeover */
132 info->apertures = alloc_apertures(1);
133 if (!info->apertures) {
137 info->apertures->ranges[0].base = dev->mode_config.fb_base;
138 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
140 info->fix.smem_start = dev->mode_config.fb_base + obj->gtt_offset;
141 info->fix.smem_len = size;
144 ioremap_wc(dev_priv->gtt.mappable_base + obj->gtt_offset,
146 if (!info->screen_base) {
150 info->screen_size = size;
152 // memset(info->screen_base, 0, size);
154 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
155 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
157 /* If the object is shmemfs backed, it will have given us zeroed pages.
158 * If the object is stolen however, it will be full of whatever
159 * garbage was left in there.
161 if (ifbdev->ifb.obj->stolen)
162 memset_io(info->screen_base, 0, info->screen_size);
164 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
166 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
167 fb->width, fb->height,
168 obj->gtt_offset, obj);
171 mutex_unlock(&dev->struct_mutex);
172 vga_switcheroo_client_fb_set(dev->pdev, info);
176 i915_gem_object_unpin(obj);
178 drm_gem_object_unreference(&obj->base);
179 mutex_unlock(&dev->struct_mutex);
184 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
185 struct drm_fb_helper_surface_size *sizes)
187 struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
192 ret = intelfb_create(ifbdev, sizes);
200 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
201 .gamma_set = intel_crtc_fb_gamma_set,
202 .gamma_get = intel_crtc_fb_gamma_get,
203 .fb_probe = intel_fb_find_or_create_single,
206 static void intel_fbdev_destroy(struct drm_device *dev,
207 struct intel_fbdev *ifbdev)
209 struct fb_info *info;
210 struct intel_framebuffer *ifb = &ifbdev->ifb;
212 if (ifbdev->helper.fbdev) {
213 info = ifbdev->helper.fbdev;
214 unregister_framebuffer(info);
215 iounmap(info->screen_base);
217 fb_dealloc_cmap(&info->cmap);
218 framebuffer_release(info);
221 drm_fb_helper_fini(&ifbdev->helper);
223 drm_framebuffer_cleanup(&ifb->base);
225 drm_gem_object_unreference_unlocked(&ifb->obj->base);
230 int intel_fbdev_init(struct drm_device *dev)
232 struct intel_fbdev *ifbdev;
233 drm_i915_private_t *dev_priv = dev->dev_private;
236 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
240 dev_priv->fbdev = ifbdev;
241 ifbdev->helper.funcs = &intel_fb_helper_funcs;
243 ret = drm_fb_helper_init(dev, &ifbdev->helper,
251 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
256 void intel_fbdev_initial_config(struct drm_device *dev)
258 drm_i915_private_t *dev_priv = dev->dev_private;
260 /* Due to peculiar init order wrt to hpd handling this is separate. */
261 drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
264 void intel_fbdev_fini(struct drm_device *dev)
266 drm_i915_private_t *dev_priv = dev->dev_private;
267 if (!dev_priv->fbdev)
270 intel_fbdev_destroy(dev, dev_priv->fbdev);
271 kfree(dev_priv->fbdev);
272 dev_priv->fbdev = NULL;
275 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
277 drm_i915_private_t *dev_priv = dev->dev_private;
278 if (!dev_priv->fbdev)
281 fb_set_suspend(dev_priv->fbdev->helper.fbdev, state);
284 MODULE_LICENSE("GPL and additional rights");
286 void intel_fb_output_poll_changed(struct drm_device *dev)
288 drm_i915_private_t *dev_priv = dev->dev_private;
289 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
292 void intel_fb_restore_mode(struct drm_device *dev)
295 drm_i915_private_t *dev_priv = dev->dev_private;
296 struct drm_mode_config *config = &dev->mode_config;
297 struct drm_plane *plane;
299 mutex_lock(&dev->mode_config.mutex);
301 ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
303 DRM_DEBUG("failed to restore crtc mode\n");
305 /* Be sure to shut off any planes that may be active */
306 list_for_each_entry(plane, &config->plane_list, head)
308 plane->funcs->disable_plane(plane);
310 mutex_unlock(&dev->mode_config.mutex);