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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}
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/console.h>
28#include <linux/delay.h>
29#include <linux/errno.h>
30#include <linux/fb.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_crtc_helper.h>
42#include <drm/drm_fb_helper.h>
43#include <drm/drm_fourcc.h>
44#include <drm/drm_gem.h>
45#include <drm/drm_gem_framebuffer_helper.h>
46
47#include "i915_drv.h"
48#include "intel_bo.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 int preferred_bpp;
62
63 /* Whether or not fbdev hpd processing is temporarily suspended */
64 bool hpd_suspended: 1;
65 /* Set when a hotplug was received while HPD processing was suspended */
66 bool hpd_waiting: 1;
67
68 /* Protects hpd_suspended */
69 struct mutex hpd_lock;
70};
71
72static struct intel_fbdev *to_intel_fbdev(struct drm_fb_helper *fb_helper)
73{
74 return container_of(fb_helper, struct intel_fbdev, helper);
75}
76
77static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev)
78{
79 return ifbdev->fb->frontbuffer;
80}
81
82static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
83{
84 intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU);
85}
86
87FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(intel_fbdev,
88 drm_fb_helper_damage_range,
89 drm_fb_helper_damage_area)
90
91static int intel_fbdev_set_par(struct fb_info *info)
92{
93 struct intel_fbdev *ifbdev = to_intel_fbdev(info->par);
94 int ret;
95
96 ret = drm_fb_helper_set_par(info);
97 if (ret == 0)
98 intel_fbdev_invalidate(ifbdev);
99
100 return ret;
101}
102
103static int intel_fbdev_blank(int blank, struct fb_info *info)
104{
105 struct intel_fbdev *ifbdev = to_intel_fbdev(info->par);
106 int ret;
107
108 ret = drm_fb_helper_blank(blank, info);
109 if (ret == 0)
110 intel_fbdev_invalidate(ifbdev);
111
112 return ret;
113}
114
115static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
116 struct fb_info *info)
117{
118 struct intel_fbdev *ifbdev = to_intel_fbdev(info->par);
119 int ret;
120
121 ret = drm_fb_helper_pan_display(var, info);
122 if (ret == 0)
123 intel_fbdev_invalidate(ifbdev);
124
125 return ret;
126}
127
128static int intel_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma)
129{
130 struct intel_fbdev *fbdev = to_intel_fbdev(info->par);
131 struct drm_gem_object *obj = drm_gem_fb_get_obj(&fbdev->fb->base, 0);
132
133 return intel_bo_fb_mmap(obj, vma);
134}
135
136static void intel_fbdev_fb_destroy(struct fb_info *info)
137{
138 struct drm_fb_helper *fb_helper = info->par;
139 struct intel_fbdev *ifbdev = container_of(fb_helper, struct intel_fbdev, helper);
140
141 drm_fb_helper_fini(&ifbdev->helper);
142
143 /*
144 * We rely on the object-free to release the VMA pinning for
145 * the info->screen_base mmaping. Leaking the VMA is simpler than
146 * trying to rectify all the possible error paths leading here.
147 */
148 intel_fb_unpin_vma(ifbdev->vma, ifbdev->vma_flags);
149 drm_framebuffer_remove(&ifbdev->fb->base);
150
151 drm_client_release(&fb_helper->client);
152 drm_fb_helper_unprepare(&ifbdev->helper);
153 kfree(ifbdev);
154}
155
156__diag_push();
157__diag_ignore_all("-Woverride-init", "Allow field initialization overrides for fb ops");
158
159static const struct fb_ops intelfb_ops = {
160 .owner = THIS_MODULE,
161 __FB_DEFAULT_DEFERRED_OPS_RDWR(intel_fbdev),
162 DRM_FB_HELPER_DEFAULT_OPS,
163 .fb_set_par = intel_fbdev_set_par,
164 .fb_blank = intel_fbdev_blank,
165 .fb_pan_display = intel_fbdev_pan_display,
166 __FB_DEFAULT_DEFERRED_OPS_DRAW(intel_fbdev),
167 .fb_mmap = intel_fbdev_mmap,
168 .fb_destroy = intel_fbdev_fb_destroy,
169};
170
171__diag_pop();
172
173static int intelfb_create(struct drm_fb_helper *helper,
174 struct drm_fb_helper_surface_size *sizes)
175{
176 struct intel_fbdev *ifbdev = to_intel_fbdev(helper);
177 struct intel_framebuffer *fb = ifbdev->fb;
178 struct drm_device *dev = helper->dev;
179 struct drm_i915_private *dev_priv = to_i915(dev);
180 const struct i915_gtt_view view = {
181 .type = I915_GTT_VIEW_NORMAL,
182 };
183 intel_wakeref_t wakeref;
184 struct fb_info *info;
185 struct i915_vma *vma;
186 unsigned long flags = 0;
187 bool prealloc = false;
188 struct drm_gem_object *obj;
189 int ret;
190
191 mutex_lock(&ifbdev->hpd_lock);
192 ret = ifbdev->hpd_suspended ? -EAGAIN : 0;
193 mutex_unlock(&ifbdev->hpd_lock);
194 if (ret)
195 return ret;
196
197 ifbdev->fb = NULL;
198
199 if (fb &&
200 (sizes->fb_width > fb->base.width ||
201 sizes->fb_height > fb->base.height)) {
202 drm_dbg_kms(&dev_priv->drm,
203 "BIOS fb too small (%dx%d), we require (%dx%d),"
204 " releasing it\n",
205 fb->base.width, fb->base.height,
206 sizes->fb_width, sizes->fb_height);
207 drm_framebuffer_put(&fb->base);
208 fb = NULL;
209 }
210 if (!fb || drm_WARN_ON(dev, !intel_fb_bo(&fb->base))) {
211 drm_dbg_kms(&dev_priv->drm,
212 "no BIOS fb, allocating a new one\n");
213 fb = intel_fbdev_fb_alloc(helper, sizes);
214 if (IS_ERR(fb))
215 return PTR_ERR(fb);
216 } else {
217 drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n");
218 prealloc = true;
219 sizes->fb_width = fb->base.width;
220 sizes->fb_height = fb->base.height;
221 }
222
223 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
224
225 /* Pin the GGTT vma for our access via info->screen_base.
226 * This also validates that any existing fb inherited from the
227 * BIOS is suitable for own access.
228 */
229 vma = intel_fb_pin_to_ggtt(&fb->base, &view,
230 fb->min_alignment, 0,
231 false, &flags);
232 if (IS_ERR(vma)) {
233 ret = PTR_ERR(vma);
234 goto out_unlock;
235 }
236
237 info = drm_fb_helper_alloc_info(helper);
238 if (IS_ERR(info)) {
239 drm_err(&dev_priv->drm, "Failed to allocate fb_info (%pe)\n", info);
240 ret = PTR_ERR(info);
241 goto out_unpin;
242 }
243
244 ifbdev->helper.fb = &fb->base;
245
246 info->fbops = &intelfb_ops;
247
248 obj = intel_fb_bo(&fb->base);
249
250 ret = intel_fbdev_fb_fill_info(dev_priv, info, obj, vma);
251 if (ret)
252 goto out_unpin;
253
254 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes);
255
256 /* If the object is shmemfs backed, it will have given us zeroed pages.
257 * If the object is stolen however, it will be full of whatever
258 * garbage was left in there.
259 */
260 if (!intel_bo_is_shmem(obj) && !prealloc)
261 memset_io(info->screen_base, 0, info->screen_size);
262
263 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
264
265 drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n",
266 fb->base.width, fb->base.height,
267 i915_ggtt_offset(vma));
268 ifbdev->fb = fb;
269 ifbdev->vma = vma;
270 ifbdev->vma_flags = flags;
271
272 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
273
274 return 0;
275
276out_unpin:
277 intel_fb_unpin_vma(vma, flags);
278out_unlock:
279 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
280 return ret;
281}
282
283static int intelfb_dirty(struct drm_fb_helper *helper, struct drm_clip_rect *clip)
284{
285 if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2))
286 return 0;
287
288 if (helper->fb->funcs->dirty)
289 return helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1);
290
291 return 0;
292}
293
294static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
295 .fb_probe = intelfb_create,
296 .fb_dirty = intelfb_dirty,
297};
298
299/*
300 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
301 * The core display code will have read out the current plane configuration,
302 * so we use that to figure out if there's an object for us to use as the
303 * fb, and if so, we re-use it for the fbdev configuration.
304 *
305 * Note we only support a single fb shared across pipes for boot (mostly for
306 * fbcon), so we just find the biggest and use that.
307 */
308static bool intel_fbdev_init_bios(struct drm_device *dev,
309 struct intel_fbdev *ifbdev)
310{
311 struct drm_i915_private *i915 = to_i915(dev);
312 struct intel_framebuffer *fb = NULL;
313 struct intel_crtc *crtc;
314 unsigned int max_size = 0;
315
316 /* Find the largest fb */
317 for_each_intel_crtc(dev, crtc) {
318 struct intel_crtc_state *crtc_state =
319 to_intel_crtc_state(crtc->base.state);
320 struct intel_plane *plane =
321 to_intel_plane(crtc->base.primary);
322 struct intel_plane_state *plane_state =
323 to_intel_plane_state(plane->base.state);
324 struct drm_gem_object *obj = intel_fb_bo(plane_state->uapi.fb);
325
326 if (!crtc_state->uapi.active) {
327 drm_dbg_kms(&i915->drm,
328 "[CRTC:%d:%s] not active, skipping\n",
329 crtc->base.base.id, crtc->base.name);
330 continue;
331 }
332
333 if (!obj) {
334 drm_dbg_kms(&i915->drm,
335 "[PLANE:%d:%s] no fb, skipping\n",
336 plane->base.base.id, plane->base.name);
337 continue;
338 }
339
340 if (obj->size > max_size) {
341 drm_dbg_kms(&i915->drm,
342 "found possible fb from [PLANE:%d:%s]\n",
343 plane->base.base.id, plane->base.name);
344 fb = to_intel_framebuffer(plane_state->uapi.fb);
345 max_size = obj->size;
346 }
347 }
348
349 if (!fb) {
350 drm_dbg_kms(&i915->drm,
351 "no active fbs found, not using BIOS config\n");
352 goto out;
353 }
354
355 /* Now make sure all the pipes will fit into it */
356 for_each_intel_crtc(dev, crtc) {
357 struct intel_crtc_state *crtc_state =
358 to_intel_crtc_state(crtc->base.state);
359 struct intel_plane *plane =
360 to_intel_plane(crtc->base.primary);
361 unsigned int cur_size;
362
363 if (!crtc_state->uapi.active) {
364 drm_dbg_kms(&i915->drm,
365 "[CRTC:%d:%s] not active, skipping\n",
366 crtc->base.base.id, crtc->base.name);
367 continue;
368 }
369
370 drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n",
371 plane->base.base.id, plane->base.name);
372
373 /*
374 * See if the plane fb we found above will fit on this
375 * pipe. Note we need to use the selected fb's pitch and bpp
376 * rather than the current pipe's, since they differ.
377 */
378 cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay;
379 cur_size = cur_size * fb->base.format->cpp[0];
380 if (fb->base.pitches[0] < cur_size) {
381 drm_dbg_kms(&i915->drm,
382 "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n",
383 plane->base.base.id, plane->base.name,
384 cur_size, fb->base.pitches[0]);
385 fb = NULL;
386 break;
387 }
388
389 cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay;
390 cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
391 cur_size *= fb->base.pitches[0];
392 drm_dbg_kms(&i915->drm,
393 "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n",
394 crtc->base.base.id, crtc->base.name,
395 crtc_state->uapi.adjusted_mode.crtc_hdisplay,
396 crtc_state->uapi.adjusted_mode.crtc_vdisplay,
397 fb->base.format->cpp[0] * 8,
398 cur_size);
399
400 if (cur_size > max_size) {
401 drm_dbg_kms(&i915->drm,
402 "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n",
403 plane->base.base.id, plane->base.name,
404 cur_size, max_size);
405 fb = NULL;
406 break;
407 }
408
409 drm_dbg_kms(&i915->drm,
410 "fb big enough [PLANE:%d:%s] (%d >= %d)\n",
411 plane->base.base.id, plane->base.name,
412 max_size, cur_size);
413 }
414
415 if (!fb) {
416 drm_dbg_kms(&i915->drm,
417 "BIOS fb not suitable for all pipes, not using\n");
418 goto out;
419 }
420
421 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
422 ifbdev->fb = fb;
423
424 drm_framebuffer_get(&ifbdev->fb->base);
425
426 /* Final pass to check if any active pipes don't have fbs */
427 for_each_intel_crtc(dev, crtc) {
428 struct intel_crtc_state *crtc_state =
429 to_intel_crtc_state(crtc->base.state);
430 struct intel_plane *plane =
431 to_intel_plane(crtc->base.primary);
432 struct intel_plane_state *plane_state =
433 to_intel_plane_state(plane->base.state);
434
435 if (!crtc_state->uapi.active)
436 continue;
437
438 drm_WARN(dev, !plane_state->uapi.fb,
439 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n",
440 plane->base.base.id, plane->base.name);
441 }
442
443
444 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n");
445 return true;
446
447out:
448
449 return false;
450}
451
452static void intel_fbdev_suspend_worker(struct work_struct *work)
453{
454 intel_fbdev_set_suspend(&container_of(work,
455 struct drm_i915_private,
456 display.fbdev.suspend_work)->drm,
457 FBINFO_STATE_RUNNING,
458 true);
459}
460
461/* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
462 * processing, fbdev will perform a full connector reprobe if a hotplug event
463 * was received while HPD was suspended.
464 */
465static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state)
466{
467 struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev;
468 bool send_hpd = false;
469
470 mutex_lock(&ifbdev->hpd_lock);
471 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED;
472 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting;
473 ifbdev->hpd_waiting = false;
474 mutex_unlock(&ifbdev->hpd_lock);
475
476 if (send_hpd) {
477 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n");
478 drm_fb_helper_hotplug_event(&ifbdev->helper);
479 }
480}
481
482void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
483{
484 struct drm_i915_private *dev_priv = to_i915(dev);
485 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
486 struct fb_info *info;
487
488 if (!ifbdev)
489 return;
490
491 if (drm_WARN_ON(&dev_priv->drm, !HAS_DISPLAY(dev_priv)))
492 return;
493
494 if (!ifbdev->vma)
495 goto set_suspend;
496
497 info = ifbdev->helper.info;
498
499 if (synchronous) {
500 /* Flush any pending work to turn the console on, and then
501 * wait to turn it off. It must be synchronous as we are
502 * about to suspend or unload the driver.
503 *
504 * Note that from within the work-handler, we cannot flush
505 * ourselves, so only flush outstanding work upon suspend!
506 */
507 if (state != FBINFO_STATE_RUNNING)
508 flush_work(&dev_priv->display.fbdev.suspend_work);
509
510 console_lock();
511 } else {
512 /*
513 * The console lock can be pretty contented on resume due
514 * to all the printk activity. Try to keep it out of the hot
515 * path of resume if possible.
516 */
517 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING);
518 if (!console_trylock()) {
519 /* Don't block our own workqueue as this can
520 * be run in parallel with other i915.ko tasks.
521 */
522 queue_work(dev_priv->unordered_wq,
523 &dev_priv->display.fbdev.suspend_work);
524 return;
525 }
526 }
527
528 /* On resume from hibernation: If the object is shmemfs backed, it has
529 * been restored from swap. If the object is stolen however, it will be
530 * full of whatever garbage was left in there.
531 */
532 if (state == FBINFO_STATE_RUNNING &&
533 !intel_bo_is_shmem(intel_fb_bo(&ifbdev->fb->base)))
534 memset_io(info->screen_base, 0, info->screen_size);
535
536 drm_fb_helper_set_suspend(&ifbdev->helper, state);
537 console_unlock();
538
539set_suspend:
540 intel_fbdev_hpd_set_suspend(dev_priv, state);
541}
542
543static int intel_fbdev_output_poll_changed(struct drm_device *dev)
544{
545 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev;
546 bool send_hpd;
547
548 if (!ifbdev)
549 return -EINVAL;
550
551 mutex_lock(&ifbdev->hpd_lock);
552 send_hpd = !ifbdev->hpd_suspended;
553 ifbdev->hpd_waiting = true;
554 mutex_unlock(&ifbdev->hpd_lock);
555
556 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
557 drm_fb_helper_hotplug_event(&ifbdev->helper);
558
559 return 0;
560}
561
562static int intel_fbdev_restore_mode(struct drm_i915_private *dev_priv)
563{
564 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
565 int ret;
566
567 if (!ifbdev)
568 return -EINVAL;
569
570 if (!ifbdev->vma)
571 return -ENOMEM;
572
573 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper);
574 if (ret)
575 return ret;
576
577 intel_fbdev_invalidate(ifbdev);
578
579 return 0;
580}
581
582/*
583 * Fbdev client and struct drm_client_funcs
584 */
585
586static void intel_fbdev_client_unregister(struct drm_client_dev *client)
587{
588 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
589 struct drm_device *dev = fb_helper->dev;
590 struct pci_dev *pdev = to_pci_dev(dev->dev);
591
592 if (fb_helper->info) {
593 vga_switcheroo_client_fb_set(pdev, NULL);
594 drm_fb_helper_unregister_info(fb_helper);
595 } else {
596 drm_fb_helper_unprepare(fb_helper);
597 drm_client_release(&fb_helper->client);
598 kfree(fb_helper);
599 }
600}
601
602static int intel_fbdev_client_restore(struct drm_client_dev *client)
603{
604 struct drm_i915_private *dev_priv = to_i915(client->dev);
605 int ret;
606
607 ret = intel_fbdev_restore_mode(dev_priv);
608 if (ret)
609 return ret;
610
611 vga_switcheroo_process_delayed_switch();
612
613 return 0;
614}
615
616static int intel_fbdev_client_hotplug(struct drm_client_dev *client)
617{
618 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
619 struct drm_device *dev = client->dev;
620 struct pci_dev *pdev = to_pci_dev(dev->dev);
621 int ret;
622
623 if (dev->fb_helper)
624 return intel_fbdev_output_poll_changed(dev);
625
626 ret = drm_fb_helper_init(dev, fb_helper);
627 if (ret)
628 goto err_drm_err;
629
630 ret = drm_fb_helper_initial_config(fb_helper);
631 if (ret)
632 goto err_drm_fb_helper_fini;
633
634 vga_switcheroo_client_fb_set(pdev, fb_helper->info);
635
636 return 0;
637
638err_drm_fb_helper_fini:
639 drm_fb_helper_fini(fb_helper);
640err_drm_err:
641 drm_err(dev, "Failed to setup i915 fbdev emulation (ret=%d)\n", ret);
642 return ret;
643}
644
645static const struct drm_client_funcs intel_fbdev_client_funcs = {
646 .owner = THIS_MODULE,
647 .unregister = intel_fbdev_client_unregister,
648 .restore = intel_fbdev_client_restore,
649 .hotplug = intel_fbdev_client_hotplug,
650};
651
652void intel_fbdev_setup(struct drm_i915_private *i915)
653{
654 struct drm_device *dev = &i915->drm;
655 struct intel_fbdev *ifbdev;
656 int ret;
657
658 if (!HAS_DISPLAY(i915))
659 return;
660
661 ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);
662 if (!ifbdev)
663 return;
664 drm_fb_helper_prepare(dev, &ifbdev->helper, 32, &intel_fb_helper_funcs);
665
666 i915->display.fbdev.fbdev = ifbdev;
667 INIT_WORK(&i915->display.fbdev.suspend_work, intel_fbdev_suspend_worker);
668 mutex_init(&ifbdev->hpd_lock);
669 if (intel_fbdev_init_bios(dev, ifbdev))
670 ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp;
671 else
672 ifbdev->preferred_bpp = ifbdev->helper.preferred_bpp;
673
674 ret = drm_client_init(dev, &ifbdev->helper.client, "intel-fbdev",
675 &intel_fbdev_client_funcs);
676 if (ret) {
677 drm_err(dev, "Failed to register client: %d\n", ret);
678 goto err_drm_fb_helper_unprepare;
679 }
680
681 drm_client_register(&ifbdev->helper.client);
682
683 return;
684
685err_drm_fb_helper_unprepare:
686 drm_fb_helper_unprepare(&ifbdev->helper);
687 mutex_destroy(&ifbdev->hpd_lock);
688 kfree(ifbdev);
689}
690
691struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev)
692{
693 if (!fbdev || !fbdev->helper.fb)
694 return NULL;
695
696 return to_intel_framebuffer(fbdev->helper.fb);
697}