1/*
2 * Copyright �� 2007 David Airlie
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 *     David Airlie
25 */
26
27#include <linux/async.h>
28#include <linux/console.h>
29#include <linux/delay.h>
30#include <linux/errno.h>
31#include <linux/fb.h>
32#include <linux/init.h>
33#include <linux/kernel.h>
34#include <linux/mm.h>
35#include <linux/module.h>
36#include <linux/string.h>
37#include <linux/sysrq.h>
38#include <linux/tty.h>
39#include <linux/vga_switcheroo.h>
40
41#include <drm/drm_crtc.h>
42#include <drm/drm_fb_helper.h>
43#include <drm/drm_fourcc.h>
44#include <drm/drm_gem_framebuffer_helper.h>
45
46#include "gem/i915_gem_mman.h"
47
48#include "i915_drv.h"
49#include "intel_display_types.h"
50#include "intel_fb.h"
51#include "intel_fb_pin.h"
52#include "intel_fbdev.h"
53#include "intel_fbdev_fb.h"
54#include "intel_frontbuffer.h"
55
56struct intel_fbdev {
57	struct drm_fb_helper helper;
58	struct intel_framebuffer *fb;
59	struct i915_vma *vma;
60	unsigned long vma_flags;
61	async_cookie_t cookie;
62	int preferred_bpp;
63
64	/* Whether or not fbdev hpd processing is temporarily suspended */
65	bool hpd_suspended: 1;
66	/* Set when a hotplug was received while HPD processing was suspended */
67	bool hpd_waiting: 1;
68
69	/* Protects hpd_suspended */
70	struct mutex hpd_lock;
71};
72
73static struct intel_fbdev *to_intel_fbdev(struct drm_fb_helper *fb_helper)
74{
75	return container_of(fb_helper, struct intel_fbdev, helper);
76}
77
78static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev)
79{
80	return ifbdev->fb->frontbuffer;
81}
82
83static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
84{
85	intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU);
86}
87
88FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(intel_fbdev,
89				  drm_fb_helper_damage_range,
90				  drm_fb_helper_damage_area)
91
92static int intel_fbdev_set_par(struct fb_info *info)
93{
94	struct intel_fbdev *ifbdev = to_intel_fbdev(info->par);
95	int ret;
96
97	ret = drm_fb_helper_set_par(info);
98	if (ret == 0)
99		intel_fbdev_invalidate(ifbdev);
100
101	return ret;
102}
103
104static int intel_fbdev_blank(int blank, struct fb_info *info)
105{
106	struct intel_fbdev *ifbdev = to_intel_fbdev(info->par);
107	int ret;
108
109	ret = drm_fb_helper_blank(blank, info);
110	if (ret == 0)
111		intel_fbdev_invalidate(ifbdev);
112
113	return ret;
114}
115
116static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
117				   struct fb_info *info)
118{
119	struct intel_fbdev *ifbdev = to_intel_fbdev(info->par);
120	int ret;
121
122	ret = drm_fb_helper_pan_display(var, info);
123	if (ret == 0)
124		intel_fbdev_invalidate(ifbdev);
125
126	return ret;
127}
128
129static int intel_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma)
130{
131	struct intel_fbdev *fbdev = to_intel_fbdev(info->par);
132	struct drm_gem_object *bo = drm_gem_fb_get_obj(&fbdev->fb->base, 0);
133	struct drm_i915_gem_object *obj = to_intel_bo(bo);
134
135	return i915_gem_fb_mmap(obj, vma);
136}
137
138static const struct fb_ops intelfb_ops = {
139	.owner = THIS_MODULE,
140	__FB_DEFAULT_DEFERRED_OPS_RDWR(intel_fbdev),
141	DRM_FB_HELPER_DEFAULT_OPS,
142	.fb_set_par = intel_fbdev_set_par,
143	.fb_blank = intel_fbdev_blank,
144	.fb_pan_display = intel_fbdev_pan_display,
145	__FB_DEFAULT_DEFERRED_OPS_DRAW(intel_fbdev),
146	.fb_mmap = intel_fbdev_mmap,
147};
148
149static int intelfb_create(struct drm_fb_helper *helper,
150			  struct drm_fb_helper_surface_size *sizes)
151{
152	struct intel_fbdev *ifbdev = to_intel_fbdev(helper);
153	struct intel_framebuffer *intel_fb = ifbdev->fb;
154	struct drm_device *dev = helper->dev;
155	struct drm_i915_private *dev_priv = to_i915(dev);
156	struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
157	const struct i915_gtt_view view = {
158		.type = I915_GTT_VIEW_NORMAL,
159	};
160	intel_wakeref_t wakeref;
161	struct fb_info *info;
162	struct i915_vma *vma;
163	unsigned long flags = 0;
164	bool prealloc = false;
165	struct drm_i915_gem_object *obj;
166	int ret;
167
168	mutex_lock(&ifbdev->hpd_lock);
169	ret = ifbdev->hpd_suspended ? -EAGAIN : 0;
170	mutex_unlock(&ifbdev->hpd_lock);
171	if (ret)
172		return ret;
173
174	if (intel_fb &&
175	    (sizes->fb_width > intel_fb->base.width ||
176	     sizes->fb_height > intel_fb->base.height)) {
177		drm_dbg_kms(&dev_priv->drm,
178			    "BIOS fb too small (%dx%d), we require (%dx%d),"
179			    " releasing it\n",
180			    intel_fb->base.width, intel_fb->base.height,
181			    sizes->fb_width, sizes->fb_height);
182		drm_framebuffer_put(&intel_fb->base);
183		intel_fb = ifbdev->fb = NULL;
184	}
185	if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) {
186		struct drm_framebuffer *fb;
187		drm_dbg_kms(&dev_priv->drm,
188			    "no BIOS fb, allocating a new one\n");
189		fb = intel_fbdev_fb_alloc(helper, sizes);
190		if (IS_ERR(fb))
191			return PTR_ERR(fb);
192		intel_fb = ifbdev->fb = to_intel_framebuffer(fb);
193	} else {
194		drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n");
195		prealloc = true;
196		sizes->fb_width = intel_fb->base.width;
197		sizes->fb_height = intel_fb->base.height;
198	}
199
200	wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
201
202	/* Pin the GGTT vma for our access via info->screen_base.
203	 * This also validates that any existing fb inherited from the
204	 * BIOS is suitable for own access.
205	 */
206	vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false,
207					 &view, false, &flags);
208	if (IS_ERR(vma)) {
209		ret = PTR_ERR(vma);
210		goto out_unlock;
211	}
212
213	info = drm_fb_helper_alloc_info(helper);
214	if (IS_ERR(info)) {
215		drm_err(&dev_priv->drm, "Failed to allocate fb_info (%pe)\n", info);
216		ret = PTR_ERR(info);
217		goto out_unpin;
218	}
219
220	ifbdev->helper.fb = &ifbdev->fb->base;
221
222	info->fbops = &intelfb_ops;
223
224	obj = intel_fb_obj(&intel_fb->base);
225
226	ret = intel_fbdev_fb_fill_info(dev_priv, info, obj, vma);
227	if (ret)
228		goto out_unpin;
229
230	drm_fb_helper_fill_info(info, &ifbdev->helper, sizes);
231
232	/* If the object is shmemfs backed, it will have given us zeroed pages.
233	 * If the object is stolen however, it will be full of whatever
234	 * garbage was left in there.
235	 */
236	if (!i915_gem_object_is_shmem(obj) && !prealloc)
237		memset_io(info->screen_base, 0, info->screen_size);
238
239	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
240
241	drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n",
242		    ifbdev->fb->base.width, ifbdev->fb->base.height,
243		    i915_ggtt_offset(vma));
244	ifbdev->vma = vma;
245	ifbdev->vma_flags = flags;
246
247	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
248	vga_switcheroo_client_fb_set(pdev, info);
249	return 0;
250
251out_unpin:
252	intel_unpin_fb_vma(vma, flags);
253out_unlock:
254	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
255	return ret;
256}
257
258static int intelfb_dirty(struct drm_fb_helper *helper, struct drm_clip_rect *clip)
259{
260	if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2))
261		return 0;
262
263	if (helper->fb->funcs->dirty)
264		return helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1);
265
266	return 0;
267}
268
269static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
270	.fb_probe = intelfb_create,
271	.fb_dirty = intelfb_dirty,
272};
273
274static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
275{
276	/* We rely on the object-free to release the VMA pinning for
277	 * the info->screen_base mmaping. Leaking the VMA is simpler than
278	 * trying to rectify all the possible error paths leading here.
279	 */
280
281	drm_fb_helper_fini(&ifbdev->helper);
282
283	if (ifbdev->vma)
284		intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags);
285
286	if (ifbdev->fb)
287		drm_framebuffer_remove(&ifbdev->fb->base);
288
289	drm_fb_helper_unprepare(&ifbdev->helper);
290	kfree(ifbdev);
291}
292
293/*
294 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
295 * The core display code will have read out the current plane configuration,
296 * so we use that to figure out if there's an object for us to use as the
297 * fb, and if so, we re-use it for the fbdev configuration.
298 *
299 * Note we only support a single fb shared across pipes for boot (mostly for
300 * fbcon), so we just find the biggest and use that.
301 */
302static bool intel_fbdev_init_bios(struct drm_device *dev,
303				  struct intel_fbdev *ifbdev)
304{
305	struct drm_i915_private *i915 = to_i915(dev);
306	struct intel_framebuffer *fb = NULL;
307	struct intel_crtc *crtc;
308	unsigned int max_size = 0;
309
310	/* Find the largest fb */
311	for_each_intel_crtc(dev, crtc) {
312		struct intel_crtc_state *crtc_state =
313			to_intel_crtc_state(crtc->base.state);
314		struct intel_plane *plane =
315			to_intel_plane(crtc->base.primary);
316		struct intel_plane_state *plane_state =
317			to_intel_plane_state(plane->base.state);
318		struct drm_i915_gem_object *obj =
319			intel_fb_obj(plane_state->uapi.fb);
320
321		if (!crtc_state->uapi.active) {
322			drm_dbg_kms(&i915->drm,
323				    "[CRTC:%d:%s] not active, skipping\n",
324				    crtc->base.base.id, crtc->base.name);
325			continue;
326		}
327
328		if (!obj) {
329			drm_dbg_kms(&i915->drm,
330				    "[PLANE:%d:%s] no fb, skipping\n",
331				    plane->base.base.id, plane->base.name);
332			continue;
333		}
334
335		if (intel_bo_to_drm_bo(obj)->size > max_size) {
336			drm_dbg_kms(&i915->drm,
337				    "found possible fb from [PLANE:%d:%s]\n",
338				    plane->base.base.id, plane->base.name);
339			fb = to_intel_framebuffer(plane_state->uapi.fb);
340			max_size = intel_bo_to_drm_bo(obj)->size;
341		}
342	}
343
344	if (!fb) {
345		drm_dbg_kms(&i915->drm,
346			    "no active fbs found, not using BIOS config\n");
347		goto out;
348	}
349
350	/* Now make sure all the pipes will fit into it */
351	for_each_intel_crtc(dev, crtc) {
352		struct intel_crtc_state *crtc_state =
353			to_intel_crtc_state(crtc->base.state);
354		struct intel_plane *plane =
355			to_intel_plane(crtc->base.primary);
356		unsigned int cur_size;
357
358		if (!crtc_state->uapi.active) {
359			drm_dbg_kms(&i915->drm,
360				    "[CRTC:%d:%s] not active, skipping\n",
361				    crtc->base.base.id, crtc->base.name);
362			continue;
363		}
364
365		drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n",
366			    plane->base.base.id, plane->base.name);
367
368		/*
369		 * See if the plane fb we found above will fit on this
370		 * pipe.  Note we need to use the selected fb's pitch and bpp
371		 * rather than the current pipe's, since they differ.
372		 */
373		cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay;
374		cur_size = cur_size * fb->base.format->cpp[0];
375		if (fb->base.pitches[0] < cur_size) {
376			drm_dbg_kms(&i915->drm,
377				    "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n",
378				    plane->base.base.id, plane->base.name,
379				    cur_size, fb->base.pitches[0]);
380			fb = NULL;
381			break;
382		}
383
384		cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay;
385		cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
386		cur_size *= fb->base.pitches[0];
387		drm_dbg_kms(&i915->drm,
388			    "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n",
389			    crtc->base.base.id, crtc->base.name,
390			    crtc_state->uapi.adjusted_mode.crtc_hdisplay,
391			    crtc_state->uapi.adjusted_mode.crtc_vdisplay,
392			    fb->base.format->cpp[0] * 8,
393			    cur_size);
394
395		if (cur_size > max_size) {
396			drm_dbg_kms(&i915->drm,
397				    "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n",
398				    plane->base.base.id, plane->base.name,
399				    cur_size, max_size);
400			fb = NULL;
401			break;
402		}
403
404		drm_dbg_kms(&i915->drm,
405			    "fb big enough [PLANE:%d:%s] (%d >= %d)\n",
406			    plane->base.base.id, plane->base.name,
407			    max_size, cur_size);
408	}
409
410	if (!fb) {
411		drm_dbg_kms(&i915->drm,
412			    "BIOS fb not suitable for all pipes, not using\n");
413		goto out;
414	}
415
416	ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
417	ifbdev->fb = fb;
418
419	drm_framebuffer_get(&ifbdev->fb->base);
420
421	/* Final pass to check if any active pipes don't have fbs */
422	for_each_intel_crtc(dev, crtc) {
423		struct intel_crtc_state *crtc_state =
424			to_intel_crtc_state(crtc->base.state);
425		struct intel_plane *plane =
426			to_intel_plane(crtc->base.primary);
427		struct intel_plane_state *plane_state =
428			to_intel_plane_state(plane->base.state);
429
430		if (!crtc_state->uapi.active)
431			continue;
432
433		drm_WARN(dev, !plane_state->uapi.fb,
434			 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n",
435			 plane->base.base.id, plane->base.name);
436	}
437
438
439	drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n");
440	return true;
441
442out:
443
444	return false;
445}
446
447static void intel_fbdev_suspend_worker(struct work_struct *work)
448{
449	intel_fbdev_set_suspend(&container_of(work,
450					      struct drm_i915_private,
451					      display.fbdev.suspend_work)->drm,
452				FBINFO_STATE_RUNNING,
453				true);
454}
455
456int intel_fbdev_init(struct drm_device *dev)
457{
458	struct drm_i915_private *dev_priv = to_i915(dev);
459	struct intel_fbdev *ifbdev;
460	int ret;
461
462	if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv)))
463		return -ENODEV;
464
465	ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
466	if (ifbdev == NULL)
467		return -ENOMEM;
468
469	mutex_init(&ifbdev->hpd_lock);
470	drm_fb_helper_prepare(dev, &ifbdev->helper, 32, &intel_fb_helper_funcs);
471
472	if (intel_fbdev_init_bios(dev, ifbdev))
473		ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp;
474	else
475		ifbdev->preferred_bpp = ifbdev->helper.preferred_bpp;
476
477	ret = drm_fb_helper_init(dev, &ifbdev->helper);
478	if (ret) {
479		kfree(ifbdev);
480		return ret;
481	}
482
483	dev_priv->display.fbdev.fbdev = ifbdev;
484	INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker);
485
486	return 0;
487}
488
489static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
490{
491	struct intel_fbdev *ifbdev = data;
492
493	/* Due to peculiar init order wrt to hpd handling this is separate. */
494	if (drm_fb_helper_initial_config(&ifbdev->helper))
495		intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
496}
497
498void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv)
499{
500	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
501
502	if (!ifbdev)
503		return;
504
505	ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
506}
507
508static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
509{
510	if (!ifbdev->cookie)
511		return;
512
513	/* Only serialises with all preceding async calls, hence +1 */
514	async_synchronize_cookie(ifbdev->cookie + 1);
515	ifbdev->cookie = 0;
516}
517
518void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
519{
520	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
521
522	if (!ifbdev)
523		return;
524
525	intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true);
526
527	if (!current_is_async())
528		intel_fbdev_sync(ifbdev);
529
530	drm_fb_helper_unregister_info(&ifbdev->helper);
531}
532
533void intel_fbdev_fini(struct drm_i915_private *dev_priv)
534{
535	struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev);
536
537	if (!ifbdev)
538		return;
539
540	intel_fbdev_destroy(ifbdev);
541}
542
543/* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
544 * processing, fbdev will perform a full connector reprobe if a hotplug event
545 * was received while HPD was suspended.
546 */
547static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state)
548{
549	struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev;
550	bool send_hpd = false;
551
552	mutex_lock(&ifbdev->hpd_lock);
553	ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED;
554	send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting;
555	ifbdev->hpd_waiting = false;
556	mutex_unlock(&ifbdev->hpd_lock);
557
558	if (send_hpd) {
559		drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n");
560		drm_fb_helper_hotplug_event(&ifbdev->helper);
561	}
562}
563
564void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
565{
566	struct drm_i915_private *dev_priv = to_i915(dev);
567	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
568	struct fb_info *info;
569
570	if (!ifbdev)
571		return;
572
573	if (drm_WARN_ON(&dev_priv->drm, !HAS_DISPLAY(dev_priv)))
574		return;
575
576	if (!ifbdev->vma)
577		goto set_suspend;
578
579	info = ifbdev->helper.info;
580
581	if (synchronous) {
582		/* Flush any pending work to turn the console on, and then
583		 * wait to turn it off. It must be synchronous as we are
584		 * about to suspend or unload the driver.
585		 *
586		 * Note that from within the work-handler, we cannot flush
587		 * ourselves, so only flush outstanding work upon suspend!
588		 */
589		if (state != FBINFO_STATE_RUNNING)
590			flush_work(&dev_priv->display.fbdev.suspend_work);
591
592		console_lock();
593	} else {
594		/*
595		 * The console lock can be pretty contented on resume due
596		 * to all the printk activity.  Try to keep it out of the hot
597		 * path of resume if possible.
598		 */
599		drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING);
600		if (!console_trylock()) {
601			/* Don't block our own workqueue as this can
602			 * be run in parallel with other i915.ko tasks.
603			 */
604			queue_work(dev_priv->unordered_wq,
605				   &dev_priv->display.fbdev.suspend_work);
606			return;
607		}
608	}
609
610	/* On resume from hibernation: If the object is shmemfs backed, it has
611	 * been restored from swap. If the object is stolen however, it will be
612	 * full of whatever garbage was left in there.
613	 */
614	if (state == FBINFO_STATE_RUNNING &&
615	    !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base)))
616		memset_io(info->screen_base, 0, info->screen_size);
617
618	drm_fb_helper_set_suspend(&ifbdev->helper, state);
619	console_unlock();
620
621set_suspend:
622	intel_fbdev_hpd_set_suspend(dev_priv, state);
623}
624
625void intel_fbdev_output_poll_changed(struct drm_device *dev)
626{
627	struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev;
628	bool send_hpd;
629
630	if (!ifbdev)
631		return;
632
633	intel_fbdev_sync(ifbdev);
634
635	mutex_lock(&ifbdev->hpd_lock);
636	send_hpd = !ifbdev->hpd_suspended;
637	ifbdev->hpd_waiting = true;
638	mutex_unlock(&ifbdev->hpd_lock);
639
640	if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
641		drm_fb_helper_hotplug_event(&ifbdev->helper);
642}
643
644void intel_fbdev_restore_mode(struct drm_i915_private *dev_priv)
645{
646	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
647
648	if (!ifbdev)
649		return;
650
651	intel_fbdev_sync(ifbdev);
652	if (!ifbdev->vma)
653		return;
654
655	if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
656		intel_fbdev_invalidate(ifbdev);
657}
658
659struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev)
660{
661	if (!fbdev || !fbdev->helper.fb)
662		return NULL;
663
664	return to_intel_framebuffer(fbdev->helper.fb);
665}
666