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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/init.h>
32#include <linux/kernel.h>
33#include <linux/mm.h>
34#include <linux/module.h>
35#include <linux/string.h>
36#include <linux/sysrq.h>
37#include <linux/tty.h>
38#include <linux/vga_switcheroo.h>
39
40#include <drm/drm_crtc.h>
41#include <drm/drm_fb_helper.h>
42#include <drm/drm_fourcc.h>
43
44#include "gem/i915_gem_lmem.h"
45
46#include "i915_drv.h"
47#include "intel_display_types.h"
48#include "intel_fbdev.h"
49#include "intel_frontbuffer.h"
50
51static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev)
52{
53 return ifbdev->fb->frontbuffer;
54}
55
56static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
57{
58 intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU);
59}
60
61static int intel_fbdev_set_par(struct fb_info *info)
62{
63 struct drm_fb_helper *fb_helper = info->par;
64 struct intel_fbdev *ifbdev =
65 container_of(fb_helper, struct intel_fbdev, helper);
66 int ret;
67
68 ret = drm_fb_helper_set_par(info);
69 if (ret == 0)
70 intel_fbdev_invalidate(ifbdev);
71
72 return ret;
73}
74
75static int intel_fbdev_blank(int blank, struct fb_info *info)
76{
77 struct drm_fb_helper *fb_helper = info->par;
78 struct intel_fbdev *ifbdev =
79 container_of(fb_helper, struct intel_fbdev, helper);
80 int ret;
81
82 ret = drm_fb_helper_blank(blank, info);
83 if (ret == 0)
84 intel_fbdev_invalidate(ifbdev);
85
86 return ret;
87}
88
89static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
90 struct fb_info *info)
91{
92 struct drm_fb_helper *fb_helper = info->par;
93 struct intel_fbdev *ifbdev =
94 container_of(fb_helper, struct intel_fbdev, helper);
95 int ret;
96
97 ret = drm_fb_helper_pan_display(var, info);
98 if (ret == 0)
99 intel_fbdev_invalidate(ifbdev);
100
101 return ret;
102}
103
104static const struct fb_ops intelfb_ops = {
105 .owner = THIS_MODULE,
106 DRM_FB_HELPER_DEFAULT_OPS,
107 .fb_set_par = intel_fbdev_set_par,
108 .fb_fillrect = drm_fb_helper_cfb_fillrect,
109 .fb_copyarea = drm_fb_helper_cfb_copyarea,
110 .fb_imageblit = drm_fb_helper_cfb_imageblit,
111 .fb_pan_display = intel_fbdev_pan_display,
112 .fb_blank = intel_fbdev_blank,
113};
114
115static int intelfb_alloc(struct drm_fb_helper *helper,
116 struct drm_fb_helper_surface_size *sizes)
117{
118 struct intel_fbdev *ifbdev =
119 container_of(helper, struct intel_fbdev, helper);
120 struct drm_framebuffer *fb;
121 struct drm_device *dev = helper->dev;
122 struct drm_i915_private *dev_priv = to_i915(dev);
123 struct drm_mode_fb_cmd2 mode_cmd = {};
124 struct drm_i915_gem_object *obj;
125 int size;
126
127 /* we don't do packed 24bpp */
128 if (sizes->surface_bpp == 24)
129 sizes->surface_bpp = 32;
130
131 mode_cmd.width = sizes->surface_width;
132 mode_cmd.height = sizes->surface_height;
133
134 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
135 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
136 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
137 sizes->surface_depth);
138
139 size = mode_cmd.pitches[0] * mode_cmd.height;
140 size = PAGE_ALIGN(size);
141
142 obj = ERR_PTR(-ENODEV);
143 if (HAS_LMEM(dev_priv)) {
144 obj = i915_gem_object_create_lmem(dev_priv, size,
145 I915_BO_ALLOC_CONTIGUOUS);
146 } else {
147 /*
148 * If the FB is too big, just don't use it since fbdev is not very
149 * important and we should probably use that space with FBC or other
150 * features.
151 */
152 if (size * 2 < dev_priv->stolen_usable_size)
153 obj = i915_gem_object_create_stolen(dev_priv, size);
154 if (IS_ERR(obj))
155 obj = i915_gem_object_create_shmem(dev_priv, size);
156 }
157
158 if (IS_ERR(obj)) {
159 drm_err(&dev_priv->drm, "failed to allocate framebuffer\n");
160 return PTR_ERR(obj);
161 }
162
163 fb = intel_framebuffer_create(obj, &mode_cmd);
164 i915_gem_object_put(obj);
165 if (IS_ERR(fb))
166 return PTR_ERR(fb);
167
168 ifbdev->fb = to_intel_framebuffer(fb);
169 return 0;
170}
171
172static int intelfb_create(struct drm_fb_helper *helper,
173 struct drm_fb_helper_surface_size *sizes)
174{
175 struct intel_fbdev *ifbdev =
176 container_of(helper, struct intel_fbdev, helper);
177 struct intel_framebuffer *intel_fb = ifbdev->fb;
178 struct drm_device *dev = helper->dev;
179 struct drm_i915_private *dev_priv = to_i915(dev);
180 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
181 struct i915_ggtt *ggtt = &dev_priv->ggtt;
182 const struct i915_ggtt_view view = {
183 .type = I915_GGTT_VIEW_NORMAL,
184 };
185 intel_wakeref_t wakeref;
186 struct fb_info *info;
187 struct i915_vma *vma;
188 unsigned long flags = 0;
189 bool prealloc = false;
190 void __iomem *vaddr;
191 struct drm_i915_gem_object *obj;
192 int ret;
193
194 if (intel_fb &&
195 (sizes->fb_width > intel_fb->base.width ||
196 sizes->fb_height > intel_fb->base.height)) {
197 drm_dbg_kms(&dev_priv->drm,
198 "BIOS fb too small (%dx%d), we require (%dx%d),"
199 " releasing it\n",
200 intel_fb->base.width, intel_fb->base.height,
201 sizes->fb_width, sizes->fb_height);
202 drm_framebuffer_put(&intel_fb->base);
203 intel_fb = ifbdev->fb = NULL;
204 }
205 if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) {
206 drm_dbg_kms(&dev_priv->drm,
207 "no BIOS fb, allocating a new one\n");
208 ret = intelfb_alloc(helper, sizes);
209 if (ret)
210 return ret;
211 intel_fb = ifbdev->fb;
212 } else {
213 drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n");
214 prealloc = true;
215 sizes->fb_width = intel_fb->base.width;
216 sizes->fb_height = intel_fb->base.height;
217 }
218
219 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
220
221 /* Pin the GGTT vma for our access via info->screen_base.
222 * This also validates that any existing fb inherited from the
223 * BIOS is suitable for own access.
224 */
225 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false,
226 &view, false, &flags);
227 if (IS_ERR(vma)) {
228 ret = PTR_ERR(vma);
229 goto out_unlock;
230 }
231
232 intel_frontbuffer_flush(to_frontbuffer(ifbdev), ORIGIN_DIRTYFB);
233
234 info = drm_fb_helper_alloc_fbi(helper);
235 if (IS_ERR(info)) {
236 drm_err(&dev_priv->drm, "Failed to allocate fb_info\n");
237 ret = PTR_ERR(info);
238 goto out_unpin;
239 }
240
241 ifbdev->helper.fb = &ifbdev->fb->base;
242
243 info->fbops = &intelfb_ops;
244
245 /* setup aperture base/size for vesafb takeover */
246 obj = intel_fb_obj(&intel_fb->base);
247 if (i915_gem_object_is_lmem(obj)) {
248 struct intel_memory_region *mem = obj->mm.region;
249
250 info->apertures->ranges[0].base = mem->io_start;
251 info->apertures->ranges[0].size = mem->total;
252
253 /* Use fbdev's framebuffer from lmem for discrete */
254 info->fix.smem_start =
255 (unsigned long)(mem->io_start +
256 i915_gem_object_get_dma_address(obj, 0));
257 info->fix.smem_len = obj->base.size;
258 } else {
259 info->apertures->ranges[0].base = ggtt->gmadr.start;
260 info->apertures->ranges[0].size = ggtt->mappable_end;
261
262 /* Our framebuffer is the entirety of fbdev's system memory */
263 info->fix.smem_start =
264 (unsigned long)(ggtt->gmadr.start + vma->node.start);
265 info->fix.smem_len = vma->node.size;
266 }
267
268 vaddr = i915_vma_pin_iomap(vma);
269 if (IS_ERR(vaddr)) {
270 drm_err(&dev_priv->drm,
271 "Failed to remap framebuffer into virtual memory\n");
272 ret = PTR_ERR(vaddr);
273 goto out_unpin;
274 }
275 info->screen_base = vaddr;
276 info->screen_size = vma->node.size;
277
278 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes);
279
280 /* If the object is shmemfs backed, it will have given us zeroed pages.
281 * If the object is stolen however, it will be full of whatever
282 * garbage was left in there.
283 */
284 if (!i915_gem_object_is_shmem(vma->obj) && !prealloc)
285 memset_io(info->screen_base, 0, info->screen_size);
286
287 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
288
289 drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n",
290 ifbdev->fb->base.width, ifbdev->fb->base.height,
291 i915_ggtt_offset(vma));
292 ifbdev->vma = vma;
293 ifbdev->vma_flags = flags;
294
295 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
296 vga_switcheroo_client_fb_set(pdev, info);
297 return 0;
298
299out_unpin:
300 intel_unpin_fb_vma(vma, flags);
301out_unlock:
302 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
303 return ret;
304}
305
306static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
307 .fb_probe = intelfb_create,
308};
309
310static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
311{
312 /* We rely on the object-free to release the VMA pinning for
313 * the info->screen_base mmaping. Leaking the VMA is simpler than
314 * trying to rectify all the possible error paths leading here.
315 */
316
317 drm_fb_helper_fini(&ifbdev->helper);
318
319 if (ifbdev->vma)
320 intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags);
321
322 if (ifbdev->fb)
323 drm_framebuffer_remove(&ifbdev->fb->base);
324
325 kfree(ifbdev);
326}
327
328/*
329 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
330 * The core display code will have read out the current plane configuration,
331 * so we use that to figure out if there's an object for us to use as the
332 * fb, and if so, we re-use it for the fbdev configuration.
333 *
334 * Note we only support a single fb shared across pipes for boot (mostly for
335 * fbcon), so we just find the biggest and use that.
336 */
337static bool intel_fbdev_init_bios(struct drm_device *dev,
338 struct intel_fbdev *ifbdev)
339{
340 struct drm_i915_private *i915 = to_i915(dev);
341 struct intel_framebuffer *fb = NULL;
342 struct drm_crtc *crtc;
343 struct intel_crtc *intel_crtc;
344 unsigned int max_size = 0;
345
346 /* Find the largest fb */
347 for_each_crtc(dev, crtc) {
348 struct drm_i915_gem_object *obj =
349 intel_fb_obj(crtc->primary->state->fb);
350 intel_crtc = to_intel_crtc(crtc);
351
352 if (!crtc->state->active || !obj) {
353 drm_dbg_kms(&i915->drm,
354 "pipe %c not active or no fb, skipping\n",
355 pipe_name(intel_crtc->pipe));
356 continue;
357 }
358
359 if (obj->base.size > max_size) {
360 drm_dbg_kms(&i915->drm,
361 "found possible fb from plane %c\n",
362 pipe_name(intel_crtc->pipe));
363 fb = to_intel_framebuffer(crtc->primary->state->fb);
364 max_size = obj->base.size;
365 }
366 }
367
368 if (!fb) {
369 drm_dbg_kms(&i915->drm,
370 "no active fbs found, not using BIOS config\n");
371 goto out;
372 }
373
374 /* Now make sure all the pipes will fit into it */
375 for_each_crtc(dev, crtc) {
376 unsigned int cur_size;
377
378 intel_crtc = to_intel_crtc(crtc);
379
380 if (!crtc->state->active) {
381 drm_dbg_kms(&i915->drm,
382 "pipe %c not active, skipping\n",
383 pipe_name(intel_crtc->pipe));
384 continue;
385 }
386
387 drm_dbg_kms(&i915->drm, "checking plane %c for BIOS fb\n",
388 pipe_name(intel_crtc->pipe));
389
390 /*
391 * See if the plane fb we found above will fit on this
392 * pipe. Note we need to use the selected fb's pitch and bpp
393 * rather than the current pipe's, since they differ.
394 */
395 cur_size = crtc->state->adjusted_mode.crtc_hdisplay;
396 cur_size = cur_size * fb->base.format->cpp[0];
397 if (fb->base.pitches[0] < cur_size) {
398 drm_dbg_kms(&i915->drm,
399 "fb not wide enough for plane %c (%d vs %d)\n",
400 pipe_name(intel_crtc->pipe),
401 cur_size, fb->base.pitches[0]);
402 fb = NULL;
403 break;
404 }
405
406 cur_size = crtc->state->adjusted_mode.crtc_vdisplay;
407 cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
408 cur_size *= fb->base.pitches[0];
409 drm_dbg_kms(&i915->drm,
410 "pipe %c area: %dx%d, bpp: %d, size: %d\n",
411 pipe_name(intel_crtc->pipe),
412 crtc->state->adjusted_mode.crtc_hdisplay,
413 crtc->state->adjusted_mode.crtc_vdisplay,
414 fb->base.format->cpp[0] * 8,
415 cur_size);
416
417 if (cur_size > max_size) {
418 drm_dbg_kms(&i915->drm,
419 "fb not big enough for plane %c (%d vs %d)\n",
420 pipe_name(intel_crtc->pipe),
421 cur_size, max_size);
422 fb = NULL;
423 break;
424 }
425
426 drm_dbg_kms(&i915->drm,
427 "fb big enough for plane %c (%d >= %d)\n",
428 pipe_name(intel_crtc->pipe),
429 max_size, cur_size);
430 }
431
432 if (!fb) {
433 drm_dbg_kms(&i915->drm,
434 "BIOS fb not suitable for all pipes, not using\n");
435 goto out;
436 }
437
438 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
439 ifbdev->fb = fb;
440
441 drm_framebuffer_get(&ifbdev->fb->base);
442
443 /* Final pass to check if any active pipes don't have fbs */
444 for_each_crtc(dev, crtc) {
445 intel_crtc = to_intel_crtc(crtc);
446
447 if (!crtc->state->active)
448 continue;
449
450 drm_WARN(dev, !crtc->primary->state->fb,
451 "re-used BIOS config but lost an fb on crtc %d\n",
452 crtc->base.id);
453 }
454
455
456 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n");
457 return true;
458
459out:
460
461 return false;
462}
463
464static void intel_fbdev_suspend_worker(struct work_struct *work)
465{
466 intel_fbdev_set_suspend(&container_of(work,
467 struct drm_i915_private,
468 fbdev_suspend_work)->drm,
469 FBINFO_STATE_RUNNING,
470 true);
471}
472
473int intel_fbdev_init(struct drm_device *dev)
474{
475 struct drm_i915_private *dev_priv = to_i915(dev);
476 struct intel_fbdev *ifbdev;
477 int ret;
478
479 if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv)))
480 return -ENODEV;
481
482 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
483 if (ifbdev == NULL)
484 return -ENOMEM;
485
486 mutex_init(&ifbdev->hpd_lock);
487 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
488
489 if (!intel_fbdev_init_bios(dev, ifbdev))
490 ifbdev->preferred_bpp = 32;
491
492 ret = drm_fb_helper_init(dev, &ifbdev->helper);
493 if (ret) {
494 kfree(ifbdev);
495 return ret;
496 }
497
498 dev_priv->fbdev = ifbdev;
499 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
500
501 return 0;
502}
503
504static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
505{
506 struct intel_fbdev *ifbdev = data;
507
508 /* Due to peculiar init order wrt to hpd handling this is separate. */
509 if (drm_fb_helper_initial_config(&ifbdev->helper,
510 ifbdev->preferred_bpp))
511 intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
512}
513
514void intel_fbdev_initial_config_async(struct drm_device *dev)
515{
516 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
517
518 if (!ifbdev)
519 return;
520
521 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
522}
523
524static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
525{
526 if (!ifbdev->cookie)
527 return;
528
529 /* Only serialises with all preceding async calls, hence +1 */
530 async_synchronize_cookie(ifbdev->cookie + 1);
531 ifbdev->cookie = 0;
532}
533
534void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
535{
536 struct intel_fbdev *ifbdev = dev_priv->fbdev;
537
538 if (!ifbdev)
539 return;
540
541 cancel_work_sync(&dev_priv->fbdev_suspend_work);
542 if (!current_is_async())
543 intel_fbdev_sync(ifbdev);
544
545 drm_fb_helper_unregister_fbi(&ifbdev->helper);
546}
547
548void intel_fbdev_fini(struct drm_i915_private *dev_priv)
549{
550 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev);
551
552 if (!ifbdev)
553 return;
554
555 intel_fbdev_destroy(ifbdev);
556}
557
558/* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
559 * processing, fbdev will perform a full connector reprobe if a hotplug event
560 * was received while HPD was suspended.
561 */
562static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state)
563{
564 struct intel_fbdev *ifbdev = i915->fbdev;
565 bool send_hpd = false;
566
567 mutex_lock(&ifbdev->hpd_lock);
568 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED;
569 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting;
570 ifbdev->hpd_waiting = false;
571 mutex_unlock(&ifbdev->hpd_lock);
572
573 if (send_hpd) {
574 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n");
575 drm_fb_helper_hotplug_event(&ifbdev->helper);
576 }
577}
578
579void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
580{
581 struct drm_i915_private *dev_priv = to_i915(dev);
582 struct intel_fbdev *ifbdev = dev_priv->fbdev;
583 struct fb_info *info;
584
585 if (!ifbdev || !ifbdev->vma)
586 return;
587
588 info = ifbdev->helper.fbdev;
589
590 if (synchronous) {
591 /* Flush any pending work to turn the console on, and then
592 * wait to turn it off. It must be synchronous as we are
593 * about to suspend or unload the driver.
594 *
595 * Note that from within the work-handler, we cannot flush
596 * ourselves, so only flush outstanding work upon suspend!
597 */
598 if (state != FBINFO_STATE_RUNNING)
599 flush_work(&dev_priv->fbdev_suspend_work);
600
601 console_lock();
602 } else {
603 /*
604 * The console lock can be pretty contented on resume due
605 * to all the printk activity. Try to keep it out of the hot
606 * path of resume if possible.
607 */
608 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING);
609 if (!console_trylock()) {
610 /* Don't block our own workqueue as this can
611 * be run in parallel with other i915.ko tasks.
612 */
613 schedule_work(&dev_priv->fbdev_suspend_work);
614 return;
615 }
616 }
617
618 /* On resume from hibernation: If the object is shmemfs backed, it has
619 * been restored from swap. If the object is stolen however, it will be
620 * full of whatever garbage was left in there.
621 */
622 if (state == FBINFO_STATE_RUNNING &&
623 !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base)))
624 memset_io(info->screen_base, 0, info->screen_size);
625
626 drm_fb_helper_set_suspend(&ifbdev->helper, state);
627 console_unlock();
628
629 intel_fbdev_hpd_set_suspend(dev_priv, state);
630}
631
632void intel_fbdev_output_poll_changed(struct drm_device *dev)
633{
634 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
635 bool send_hpd;
636
637 if (!ifbdev)
638 return;
639
640 intel_fbdev_sync(ifbdev);
641
642 mutex_lock(&ifbdev->hpd_lock);
643 send_hpd = !ifbdev->hpd_suspended;
644 ifbdev->hpd_waiting = true;
645 mutex_unlock(&ifbdev->hpd_lock);
646
647 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
648 drm_fb_helper_hotplug_event(&ifbdev->helper);
649}
650
651void intel_fbdev_restore_mode(struct drm_device *dev)
652{
653 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
654
655 if (!ifbdev)
656 return;
657
658 intel_fbdev_sync(ifbdev);
659 if (!ifbdev->vma)
660 return;
661
662 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
663 intel_fbdev_invalidate(ifbdev);
664}