3 * Copyright (C) 2012 Samsung Electronics Co.Ltd
5 * Inki Dae <inki.dae@samsung.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
15 #include <linux/kernel.h>
16 #include <linux/platform_device.h>
18 #include <drm/exynos_drm.h>
20 #include <drm/drm_edid.h>
21 #include <drm/drm_crtc_helper.h>
23 #include "exynos_drm_drv.h"
24 #include "exynos_drm_crtc.h"
25 #include "exynos_drm_encoder.h"
27 /* vidi has totally three virtual windows. */
30 #define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev))
32 struct vidi_win_data {
33 unsigned int offset_x;
34 unsigned int offset_y;
35 unsigned int ovl_width;
36 unsigned int ovl_height;
37 unsigned int fb_width;
38 unsigned int fb_height;
41 unsigned int buf_offsize;
42 unsigned int line_size; /* bytes */
47 struct exynos_drm_subdrv subdrv;
48 struct drm_crtc *crtc;
49 struct vidi_win_data win_data[WINDOWS_NR];
50 struct edid *raw_edid;
52 unsigned int default_win;
53 unsigned long irq_flags;
54 unsigned int connected;
58 struct work_struct work;
62 static const char fake_edid_info[] = {
63 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
64 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
65 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
66 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
67 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
68 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
69 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
70 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
71 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
72 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
73 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
74 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
75 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
76 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
77 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
78 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
79 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
80 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
81 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x06
87 static bool vidi_display_is_connected(struct device *dev)
89 struct vidi_context *ctx = get_vidi_context(dev);
92 * connection request would come from user side
93 * to do hotplug through specific ioctl.
95 return ctx->connected ? true : false;
98 static struct edid *vidi_get_edid(struct device *dev,
99 struct drm_connector *connector)
101 struct vidi_context *ctx = get_vidi_context(dev);
106 * the edid data comes from user side and it would be set
107 * to ctx->raw_edid through specific ioctl.
109 if (!ctx->raw_edid) {
110 DRM_DEBUG_KMS("raw_edid is null.\n");
111 return ERR_PTR(-EFAULT);
114 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
115 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
117 DRM_DEBUG_KMS("failed to allocate edid\n");
118 return ERR_PTR(-ENOMEM);
124 static void *vidi_get_panel(struct device *dev)
131 static int vidi_check_mode(struct device *dev, struct drm_display_mode *mode)
138 static int vidi_display_power_on(struct device *dev, int mode)
145 static struct exynos_drm_display_ops vidi_display_ops = {
146 .type = EXYNOS_DISPLAY_TYPE_VIDI,
147 .is_connected = vidi_display_is_connected,
148 .get_edid = vidi_get_edid,
149 .get_panel = vidi_get_panel,
150 .check_mode = vidi_check_mode,
151 .power_on = vidi_display_power_on,
154 static void vidi_dpms(struct device *subdrv_dev, int mode)
156 struct vidi_context *ctx = get_vidi_context(subdrv_dev);
158 DRM_DEBUG_KMS("%d\n", mode);
160 mutex_lock(&ctx->lock);
163 case DRM_MODE_DPMS_ON:
166 case DRM_MODE_DPMS_STANDBY:
167 case DRM_MODE_DPMS_SUSPEND:
168 case DRM_MODE_DPMS_OFF:
172 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
176 mutex_unlock(&ctx->lock);
179 static void vidi_apply(struct device *subdrv_dev)
181 struct vidi_context *ctx = get_vidi_context(subdrv_dev);
182 struct exynos_drm_manager *mgr = ctx->subdrv.manager;
183 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
184 struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
185 struct vidi_win_data *win_data;
188 for (i = 0; i < WINDOWS_NR; i++) {
189 win_data = &ctx->win_data[i];
190 if (win_data->enabled && (ovl_ops && ovl_ops->commit))
191 ovl_ops->commit(subdrv_dev, i);
194 if (mgr_ops && mgr_ops->commit)
195 mgr_ops->commit(subdrv_dev);
198 static void vidi_commit(struct device *dev)
200 struct vidi_context *ctx = get_vidi_context(dev);
206 static int vidi_enable_vblank(struct device *dev)
208 struct vidi_context *ctx = get_vidi_context(dev);
213 if (!test_and_set_bit(0, &ctx->irq_flags))
214 ctx->vblank_on = true;
216 ctx->direct_vblank = true;
219 * in case of page flip request, vidi_finish_pageflip function
220 * will not be called because direct_vblank is true and then
221 * that function will be called by overlay_ops->commit callback
223 schedule_work(&ctx->work);
228 static void vidi_disable_vblank(struct device *dev)
230 struct vidi_context *ctx = get_vidi_context(dev);
235 if (test_and_clear_bit(0, &ctx->irq_flags))
236 ctx->vblank_on = false;
239 static struct exynos_drm_manager_ops vidi_manager_ops = {
242 .commit = vidi_commit,
243 .enable_vblank = vidi_enable_vblank,
244 .disable_vblank = vidi_disable_vblank,
247 static void vidi_win_mode_set(struct device *dev,
248 struct exynos_drm_overlay *overlay)
250 struct vidi_context *ctx = get_vidi_context(dev);
251 struct vidi_win_data *win_data;
253 unsigned long offset;
256 dev_err(dev, "overlay is NULL\n");
261 if (win == DEFAULT_ZPOS)
262 win = ctx->default_win;
264 if (win < 0 || win >= WINDOWS_NR)
267 offset = overlay->fb_x * (overlay->bpp >> 3);
268 offset += overlay->fb_y * overlay->pitch;
270 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
272 win_data = &ctx->win_data[win];
274 win_data->offset_x = overlay->crtc_x;
275 win_data->offset_y = overlay->crtc_y;
276 win_data->ovl_width = overlay->crtc_width;
277 win_data->ovl_height = overlay->crtc_height;
278 win_data->fb_width = overlay->fb_width;
279 win_data->fb_height = overlay->fb_height;
280 win_data->dma_addr = overlay->dma_addr[0] + offset;
281 win_data->bpp = overlay->bpp;
282 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
284 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
287 * some parts of win_data should be transferred to user side
288 * through specific ioctl.
291 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
292 win_data->offset_x, win_data->offset_y);
293 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
294 win_data->ovl_width, win_data->ovl_height);
295 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
296 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
297 overlay->fb_width, overlay->crtc_width);
300 static void vidi_win_commit(struct device *dev, int zpos)
302 struct vidi_context *ctx = get_vidi_context(dev);
303 struct vidi_win_data *win_data;
309 if (win == DEFAULT_ZPOS)
310 win = ctx->default_win;
312 if (win < 0 || win >= WINDOWS_NR)
315 win_data = &ctx->win_data[win];
317 win_data->enabled = true;
319 DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
322 schedule_work(&ctx->work);
325 static void vidi_win_disable(struct device *dev, int zpos)
327 struct vidi_context *ctx = get_vidi_context(dev);
328 struct vidi_win_data *win_data;
331 if (win == DEFAULT_ZPOS)
332 win = ctx->default_win;
334 if (win < 0 || win >= WINDOWS_NR)
337 win_data = &ctx->win_data[win];
338 win_data->enabled = false;
343 static struct exynos_drm_overlay_ops vidi_overlay_ops = {
344 .mode_set = vidi_win_mode_set,
345 .commit = vidi_win_commit,
346 .disable = vidi_win_disable,
349 static struct exynos_drm_manager vidi_manager = {
351 .ops = &vidi_manager_ops,
352 .overlay_ops = &vidi_overlay_ops,
353 .display_ops = &vidi_display_ops,
356 static void vidi_fake_vblank_handler(struct work_struct *work)
358 struct vidi_context *ctx = container_of(work, struct vidi_context,
360 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
361 struct exynos_drm_manager *manager = subdrv->manager;
363 if (manager->pipe < 0)
366 /* refresh rate is about 50Hz. */
367 usleep_range(16000, 20000);
369 mutex_lock(&ctx->lock);
371 if (ctx->direct_vblank) {
372 drm_handle_vblank(subdrv->drm_dev, manager->pipe);
373 ctx->direct_vblank = false;
374 mutex_unlock(&ctx->lock);
378 mutex_unlock(&ctx->lock);
380 exynos_drm_crtc_finish_pageflip(subdrv->drm_dev, manager->pipe);
383 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
386 * enable drm irq mode.
387 * - with irq_enabled = 1, we can use the vblank feature.
389 * P.S. note that we wouldn't use drm irq handler but
390 * just specific driver own one instead because
391 * drm framework supports only one irq handler.
393 drm_dev->irq_enabled = 1;
396 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
397 * by drm timer once a current process gives up ownership of
398 * vblank event.(after drm_vblank_put function is called)
400 drm_dev->vblank_disable_allowed = 1;
405 static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
410 static int vidi_power_on(struct vidi_context *ctx, bool enable)
412 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
413 struct device *dev = subdrv->dev;
416 ctx->suspended = false;
418 /* if vblank was enabled status, enable it again. */
419 if (test_and_clear_bit(0, &ctx->irq_flags))
420 vidi_enable_vblank(dev);
424 ctx->suspended = true;
430 static int vidi_show_connection(struct device *dev,
431 struct device_attribute *attr, char *buf)
434 struct vidi_context *ctx = get_vidi_context(dev);
436 mutex_lock(&ctx->lock);
438 rc = sprintf(buf, "%d\n", ctx->connected);
440 mutex_unlock(&ctx->lock);
445 static int vidi_store_connection(struct device *dev,
446 struct device_attribute *attr,
447 const char *buf, size_t len)
449 struct vidi_context *ctx = get_vidi_context(dev);
452 ret = kstrtoint(buf, 0, &ctx->connected);
456 if (ctx->connected > 1)
459 /* use fake edid data for test. */
461 ctx->raw_edid = (struct edid *)fake_edid_info;
463 /* if raw_edid isn't same as fake data then it can't be tested. */
464 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
465 DRM_DEBUG_KMS("edid data is not fake data.\n");
469 DRM_DEBUG_KMS("requested connection.\n");
471 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
476 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
477 vidi_store_connection);
479 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
480 struct drm_file *file_priv)
482 struct vidi_context *ctx = NULL;
483 struct drm_encoder *encoder;
484 struct exynos_drm_manager *manager;
485 struct exynos_drm_display_ops *display_ops;
486 struct drm_exynos_vidi_connection *vidi = data;
490 DRM_DEBUG_KMS("user data for vidi is null.\n");
494 if (vidi->connection > 1) {
495 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
499 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
501 manager = exynos_drm_get_manager(encoder);
502 display_ops = manager->display_ops;
504 if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
505 ctx = get_vidi_context(manager->dev);
511 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
515 if (ctx->connected == vidi->connection) {
516 DRM_DEBUG_KMS("same connection request.\n");
520 if (vidi->connection) {
521 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
522 if (!drm_edid_is_valid(raw_edid)) {
523 DRM_DEBUG_KMS("edid data is invalid.\n");
526 edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
527 ctx->raw_edid = kmemdup(raw_edid, edid_len, GFP_KERNEL);
528 if (!ctx->raw_edid) {
529 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
534 * with connection = 0, free raw_edid
535 * only if raw edid data isn't same as fake data.
537 if (ctx->raw_edid && ctx->raw_edid !=
538 (struct edid *)fake_edid_info) {
539 kfree(ctx->raw_edid);
540 ctx->raw_edid = NULL;
544 ctx->connected = vidi->connection;
545 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
550 static int vidi_probe(struct platform_device *pdev)
552 struct device *dev = &pdev->dev;
553 struct vidi_context *ctx;
554 struct exynos_drm_subdrv *subdrv;
557 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
561 ctx->default_win = 0;
563 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
565 subdrv = &ctx->subdrv;
567 subdrv->manager = &vidi_manager;
568 subdrv->probe = vidi_subdrv_probe;
569 subdrv->remove = vidi_subdrv_remove;
571 mutex_init(&ctx->lock);
573 platform_set_drvdata(pdev, ctx);
575 ret = device_create_file(dev, &dev_attr_connection);
577 DRM_INFO("failed to create connection sysfs.\n");
579 exynos_drm_subdrv_register(subdrv);
584 static int vidi_remove(struct platform_device *pdev)
586 struct vidi_context *ctx = platform_get_drvdata(pdev);
588 exynos_drm_subdrv_unregister(&ctx->subdrv);
590 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
591 kfree(ctx->raw_edid);
592 ctx->raw_edid = NULL;
598 #ifdef CONFIG_PM_SLEEP
599 static int vidi_suspend(struct device *dev)
601 struct vidi_context *ctx = get_vidi_context(dev);
603 return vidi_power_on(ctx, false);
606 static int vidi_resume(struct device *dev)
608 struct vidi_context *ctx = get_vidi_context(dev);
610 return vidi_power_on(ctx, true);
614 static const struct dev_pm_ops vidi_pm_ops = {
615 SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
618 struct platform_driver vidi_driver = {
620 .remove = vidi_remove,
622 .name = "exynos-drm-vidi",
623 .owner = THIS_MODULE,