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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/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}
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_fb.h"
49#include "intel_fb_pin.h"
50#include "intel_fbdev.h"
51#include "intel_frontbuffer.h"
52
53struct intel_fbdev {
54 struct drm_fb_helper helper;
55 struct intel_framebuffer *fb;
56 struct i915_vma *vma;
57 unsigned long vma_flags;
58 async_cookie_t cookie;
59 int preferred_bpp;
60
61 /* Whether or not fbdev hpd processing is temporarily suspended */
62 bool hpd_suspended: 1;
63 /* Set when a hotplug was received while HPD processing was suspended */
64 bool hpd_waiting: 1;
65
66 /* Protects hpd_suspended */
67 struct mutex hpd_lock;
68};
69
70static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev)
71{
72 return ifbdev->fb->frontbuffer;
73}
74
75static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
76{
77 intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU);
78}
79
80static int intel_fbdev_set_par(struct fb_info *info)
81{
82 struct drm_fb_helper *fb_helper = info->par;
83 struct intel_fbdev *ifbdev =
84 container_of(fb_helper, struct intel_fbdev, helper);
85 int ret;
86
87 ret = drm_fb_helper_set_par(info);
88 if (ret == 0)
89 intel_fbdev_invalidate(ifbdev);
90
91 return ret;
92}
93
94static int intel_fbdev_blank(int blank, struct fb_info *info)
95{
96 struct drm_fb_helper *fb_helper = info->par;
97 struct intel_fbdev *ifbdev =
98 container_of(fb_helper, struct intel_fbdev, helper);
99 int ret;
100
101 ret = drm_fb_helper_blank(blank, info);
102 if (ret == 0)
103 intel_fbdev_invalidate(ifbdev);
104
105 return ret;
106}
107
108static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
109 struct fb_info *info)
110{
111 struct drm_fb_helper *fb_helper = info->par;
112 struct intel_fbdev *ifbdev =
113 container_of(fb_helper, struct intel_fbdev, helper);
114 int ret;
115
116 ret = drm_fb_helper_pan_display(var, info);
117 if (ret == 0)
118 intel_fbdev_invalidate(ifbdev);
119
120 return ret;
121}
122
123static const struct fb_ops intelfb_ops = {
124 .owner = THIS_MODULE,
125 DRM_FB_HELPER_DEFAULT_OPS,
126 .fb_set_par = intel_fbdev_set_par,
127 .fb_read = drm_fb_helper_cfb_read,
128 .fb_write = drm_fb_helper_cfb_write,
129 .fb_fillrect = drm_fb_helper_cfb_fillrect,
130 .fb_copyarea = drm_fb_helper_cfb_copyarea,
131 .fb_imageblit = drm_fb_helper_cfb_imageblit,
132 .fb_pan_display = intel_fbdev_pan_display,
133 .fb_blank = intel_fbdev_blank,
134};
135
136static int intelfb_alloc(struct drm_fb_helper *helper,
137 struct drm_fb_helper_surface_size *sizes)
138{
139 struct intel_fbdev *ifbdev =
140 container_of(helper, struct intel_fbdev, helper);
141 struct drm_framebuffer *fb;
142 struct drm_device *dev = helper->dev;
143 struct drm_i915_private *dev_priv = to_i915(dev);
144 struct drm_mode_fb_cmd2 mode_cmd = {};
145 struct drm_i915_gem_object *obj;
146 int size;
147
148 /* we don't do packed 24bpp */
149 if (sizes->surface_bpp == 24)
150 sizes->surface_bpp = 32;
151
152 mode_cmd.width = sizes->surface_width;
153 mode_cmd.height = sizes->surface_height;
154
155 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
156 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
157 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
158 sizes->surface_depth);
159
160 size = mode_cmd.pitches[0] * mode_cmd.height;
161 size = PAGE_ALIGN(size);
162
163 obj = ERR_PTR(-ENODEV);
164 if (HAS_LMEM(dev_priv)) {
165 obj = i915_gem_object_create_lmem(dev_priv, size,
166 I915_BO_ALLOC_CONTIGUOUS);
167 } else {
168 /*
169 * If the FB is too big, just don't use it since fbdev is not very
170 * important and we should probably use that space with FBC or other
171 * features.
172 */
173 if (size * 2 < dev_priv->stolen_usable_size)
174 obj = i915_gem_object_create_stolen(dev_priv, size);
175 if (IS_ERR(obj))
176 obj = i915_gem_object_create_shmem(dev_priv, size);
177 }
178
179 if (IS_ERR(obj)) {
180 drm_err(&dev_priv->drm, "failed to allocate framebuffer (%pe)\n", obj);
181 return PTR_ERR(obj);
182 }
183
184 fb = intel_framebuffer_create(obj, &mode_cmd);
185 i915_gem_object_put(obj);
186 if (IS_ERR(fb))
187 return PTR_ERR(fb);
188
189 ifbdev->fb = to_intel_framebuffer(fb);
190 return 0;
191}
192
193static int intelfb_create(struct drm_fb_helper *helper,
194 struct drm_fb_helper_surface_size *sizes)
195{
196 struct intel_fbdev *ifbdev =
197 container_of(helper, struct intel_fbdev, helper);
198 struct intel_framebuffer *intel_fb = ifbdev->fb;
199 struct drm_device *dev = helper->dev;
200 struct drm_i915_private *dev_priv = to_i915(dev);
201 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
202 struct i915_ggtt *ggtt = to_gt(dev_priv)->ggtt;
203 const struct i915_gtt_view view = {
204 .type = I915_GTT_VIEW_NORMAL,
205 };
206 intel_wakeref_t wakeref;
207 struct fb_info *info;
208 struct i915_vma *vma;
209 unsigned long flags = 0;
210 bool prealloc = false;
211 void __iomem *vaddr;
212 struct drm_i915_gem_object *obj;
213 int ret;
214
215 mutex_lock(&ifbdev->hpd_lock);
216 ret = ifbdev->hpd_suspended ? -EAGAIN : 0;
217 mutex_unlock(&ifbdev->hpd_lock);
218 if (ret)
219 return ret;
220
221 if (intel_fb &&
222 (sizes->fb_width > intel_fb->base.width ||
223 sizes->fb_height > intel_fb->base.height)) {
224 drm_dbg_kms(&dev_priv->drm,
225 "BIOS fb too small (%dx%d), we require (%dx%d),"
226 " releasing it\n",
227 intel_fb->base.width, intel_fb->base.height,
228 sizes->fb_width, sizes->fb_height);
229 drm_framebuffer_put(&intel_fb->base);
230 intel_fb = ifbdev->fb = NULL;
231 }
232 if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) {
233 drm_dbg_kms(&dev_priv->drm,
234 "no BIOS fb, allocating a new one\n");
235 ret = intelfb_alloc(helper, sizes);
236 if (ret)
237 return ret;
238 intel_fb = ifbdev->fb;
239 } else {
240 drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n");
241 prealloc = true;
242 sizes->fb_width = intel_fb->base.width;
243 sizes->fb_height = intel_fb->base.height;
244 }
245
246 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
247
248 /* Pin the GGTT vma for our access via info->screen_base.
249 * This also validates that any existing fb inherited from the
250 * BIOS is suitable for own access.
251 */
252 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false,
253 &view, false, &flags);
254 if (IS_ERR(vma)) {
255 ret = PTR_ERR(vma);
256 goto out_unlock;
257 }
258
259 info = drm_fb_helper_alloc_info(helper);
260 if (IS_ERR(info)) {
261 drm_err(&dev_priv->drm, "Failed to allocate fb_info (%pe)\n", info);
262 ret = PTR_ERR(info);
263 goto out_unpin;
264 }
265
266 ifbdev->helper.fb = &ifbdev->fb->base;
267
268 info->fbops = &intelfb_ops;
269
270 /* setup aperture base/size for vesafb takeover */
271 obj = intel_fb_obj(&intel_fb->base);
272 if (i915_gem_object_is_lmem(obj)) {
273 struct intel_memory_region *mem = obj->mm.region;
274
275 info->apertures->ranges[0].base = mem->io_start;
276 info->apertures->ranges[0].size = mem->io_size;
277
278 /* Use fbdev's framebuffer from lmem for discrete */
279 info->fix.smem_start =
280 (unsigned long)(mem->io_start +
281 i915_gem_object_get_dma_address(obj, 0));
282 info->fix.smem_len = obj->base.size;
283 } else {
284 info->apertures->ranges[0].base = ggtt->gmadr.start;
285 info->apertures->ranges[0].size = ggtt->mappable_end;
286
287 /* Our framebuffer is the entirety of fbdev's system memory */
288 info->fix.smem_start =
289 (unsigned long)(ggtt->gmadr.start + vma->node.start);
290 info->fix.smem_len = vma->size;
291 }
292
293 vaddr = i915_vma_pin_iomap(vma);
294 if (IS_ERR(vaddr)) {
295 drm_err(&dev_priv->drm,
296 "Failed to remap framebuffer into virtual memory (%pe)\n", vaddr);
297 ret = PTR_ERR(vaddr);
298 goto out_unpin;
299 }
300 info->screen_base = vaddr;
301 info->screen_size = vma->size;
302
303 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes);
304
305 /* If the object is shmemfs backed, it will have given us zeroed pages.
306 * If the object is stolen however, it will be full of whatever
307 * garbage was left in there.
308 */
309 if (!i915_gem_object_is_shmem(vma->obj) && !prealloc)
310 memset_io(info->screen_base, 0, info->screen_size);
311
312 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
313
314 drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n",
315 ifbdev->fb->base.width, ifbdev->fb->base.height,
316 i915_ggtt_offset(vma));
317 ifbdev->vma = vma;
318 ifbdev->vma_flags = flags;
319
320 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
321 vga_switcheroo_client_fb_set(pdev, info);
322 return 0;
323
324out_unpin:
325 intel_unpin_fb_vma(vma, flags);
326out_unlock:
327 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
328 return ret;
329}
330
331static int intelfb_dirty(struct drm_fb_helper *helper, struct drm_clip_rect *clip)
332{
333 if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2))
334 return 0;
335
336 if (helper->fb->funcs->dirty)
337 return helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1);
338
339 return 0;
340}
341
342static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
343 .fb_probe = intelfb_create,
344 .fb_dirty = intelfb_dirty,
345};
346
347static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
348{
349 /* We rely on the object-free to release the VMA pinning for
350 * the info->screen_base mmaping. Leaking the VMA is simpler than
351 * trying to rectify all the possible error paths leading here.
352 */
353
354 drm_fb_helper_fini(&ifbdev->helper);
355
356 if (ifbdev->vma)
357 intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags);
358
359 if (ifbdev->fb)
360 drm_framebuffer_remove(&ifbdev->fb->base);
361
362 kfree(ifbdev);
363}
364
365/*
366 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
367 * The core display code will have read out the current plane configuration,
368 * so we use that to figure out if there's an object for us to use as the
369 * fb, and if so, we re-use it for the fbdev configuration.
370 *
371 * Note we only support a single fb shared across pipes for boot (mostly for
372 * fbcon), so we just find the biggest and use that.
373 */
374static bool intel_fbdev_init_bios(struct drm_device *dev,
375 struct intel_fbdev *ifbdev)
376{
377 struct drm_i915_private *i915 = to_i915(dev);
378 struct intel_framebuffer *fb = NULL;
379 struct intel_crtc *crtc;
380 unsigned int max_size = 0;
381
382 /* Find the largest fb */
383 for_each_intel_crtc(dev, crtc) {
384 struct intel_crtc_state *crtc_state =
385 to_intel_crtc_state(crtc->base.state);
386 struct intel_plane *plane =
387 to_intel_plane(crtc->base.primary);
388 struct intel_plane_state *plane_state =
389 to_intel_plane_state(plane->base.state);
390 struct drm_i915_gem_object *obj =
391 intel_fb_obj(plane_state->uapi.fb);
392
393 if (!crtc_state->uapi.active) {
394 drm_dbg_kms(&i915->drm,
395 "[CRTC:%d:%s] not active, skipping\n",
396 crtc->base.base.id, crtc->base.name);
397 continue;
398 }
399
400 if (!obj) {
401 drm_dbg_kms(&i915->drm,
402 "[PLANE:%d:%s] no fb, skipping\n",
403 plane->base.base.id, plane->base.name);
404 continue;
405 }
406
407 if (obj->base.size > max_size) {
408 drm_dbg_kms(&i915->drm,
409 "found possible fb from [PLANE:%d:%s]\n",
410 plane->base.base.id, plane->base.name);
411 fb = to_intel_framebuffer(plane_state->uapi.fb);
412 max_size = obj->base.size;
413 }
414 }
415
416 if (!fb) {
417 drm_dbg_kms(&i915->drm,
418 "no active fbs found, not using BIOS config\n");
419 goto out;
420 }
421
422 /* Now make sure all the pipes will fit into it */
423 for_each_intel_crtc(dev, crtc) {
424 struct intel_crtc_state *crtc_state =
425 to_intel_crtc_state(crtc->base.state);
426 struct intel_plane *plane =
427 to_intel_plane(crtc->base.primary);
428 unsigned int cur_size;
429
430 if (!crtc_state->uapi.active) {
431 drm_dbg_kms(&i915->drm,
432 "[CRTC:%d:%s] not active, skipping\n",
433 crtc->base.base.id, crtc->base.name);
434 continue;
435 }
436
437 drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n",
438 plane->base.base.id, plane->base.name);
439
440 /*
441 * See if the plane fb we found above will fit on this
442 * pipe. Note we need to use the selected fb's pitch and bpp
443 * rather than the current pipe's, since they differ.
444 */
445 cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay;
446 cur_size = cur_size * fb->base.format->cpp[0];
447 if (fb->base.pitches[0] < cur_size) {
448 drm_dbg_kms(&i915->drm,
449 "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n",
450 plane->base.base.id, plane->base.name,
451 cur_size, fb->base.pitches[0]);
452 fb = NULL;
453 break;
454 }
455
456 cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay;
457 cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
458 cur_size *= fb->base.pitches[0];
459 drm_dbg_kms(&i915->drm,
460 "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n",
461 crtc->base.base.id, crtc->base.name,
462 crtc_state->uapi.adjusted_mode.crtc_hdisplay,
463 crtc_state->uapi.adjusted_mode.crtc_vdisplay,
464 fb->base.format->cpp[0] * 8,
465 cur_size);
466
467 if (cur_size > max_size) {
468 drm_dbg_kms(&i915->drm,
469 "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n",
470 plane->base.base.id, plane->base.name,
471 cur_size, max_size);
472 fb = NULL;
473 break;
474 }
475
476 drm_dbg_kms(&i915->drm,
477 "fb big enough [PLANE:%d:%s] (%d >= %d)\n",
478 plane->base.base.id, plane->base.name,
479 max_size, cur_size);
480 }
481
482 if (!fb) {
483 drm_dbg_kms(&i915->drm,
484 "BIOS fb not suitable for all pipes, not using\n");
485 goto out;
486 }
487
488 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
489 ifbdev->fb = fb;
490
491 drm_framebuffer_get(&ifbdev->fb->base);
492
493 /* Final pass to check if any active pipes don't have fbs */
494 for_each_intel_crtc(dev, crtc) {
495 struct intel_crtc_state *crtc_state =
496 to_intel_crtc_state(crtc->base.state);
497 struct intel_plane *plane =
498 to_intel_plane(crtc->base.primary);
499 struct intel_plane_state *plane_state =
500 to_intel_plane_state(plane->base.state);
501
502 if (!crtc_state->uapi.active)
503 continue;
504
505 drm_WARN(dev, !plane_state->uapi.fb,
506 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n",
507 plane->base.base.id, plane->base.name);
508 }
509
510
511 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n");
512 return true;
513
514out:
515
516 return false;
517}
518
519static void intel_fbdev_suspend_worker(struct work_struct *work)
520{
521 intel_fbdev_set_suspend(&container_of(work,
522 struct drm_i915_private,
523 display.fbdev.suspend_work)->drm,
524 FBINFO_STATE_RUNNING,
525 true);
526}
527
528int intel_fbdev_init(struct drm_device *dev)
529{
530 struct drm_i915_private *dev_priv = to_i915(dev);
531 struct intel_fbdev *ifbdev;
532 int ret;
533
534 if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv)))
535 return -ENODEV;
536
537 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
538 if (ifbdev == NULL)
539 return -ENOMEM;
540
541 mutex_init(&ifbdev->hpd_lock);
542 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
543
544 if (!intel_fbdev_init_bios(dev, ifbdev))
545 ifbdev->preferred_bpp = 32;
546
547 ret = drm_fb_helper_init(dev, &ifbdev->helper);
548 if (ret) {
549 kfree(ifbdev);
550 return ret;
551 }
552
553 dev_priv->display.fbdev.fbdev = ifbdev;
554 INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker);
555
556 return 0;
557}
558
559static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
560{
561 struct intel_fbdev *ifbdev = data;
562
563 /* Due to peculiar init order wrt to hpd handling this is separate. */
564 if (drm_fb_helper_initial_config(&ifbdev->helper,
565 ifbdev->preferred_bpp))
566 intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
567}
568
569void intel_fbdev_initial_config_async(struct drm_device *dev)
570{
571 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev;
572
573 if (!ifbdev)
574 return;
575
576 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
577}
578
579static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
580{
581 if (!ifbdev->cookie)
582 return;
583
584 /* Only serialises with all preceding async calls, hence +1 */
585 async_synchronize_cookie(ifbdev->cookie + 1);
586 ifbdev->cookie = 0;
587}
588
589void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
590{
591 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
592
593 if (!ifbdev)
594 return;
595
596 intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true);
597
598 if (!current_is_async())
599 intel_fbdev_sync(ifbdev);
600
601 drm_fb_helper_unregister_info(&ifbdev->helper);
602}
603
604void intel_fbdev_fini(struct drm_i915_private *dev_priv)
605{
606 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev);
607
608 if (!ifbdev)
609 return;
610
611 intel_fbdev_destroy(ifbdev);
612}
613
614/* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
615 * processing, fbdev will perform a full connector reprobe if a hotplug event
616 * was received while HPD was suspended.
617 */
618static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state)
619{
620 struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev;
621 bool send_hpd = false;
622
623 mutex_lock(&ifbdev->hpd_lock);
624 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED;
625 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting;
626 ifbdev->hpd_waiting = false;
627 mutex_unlock(&ifbdev->hpd_lock);
628
629 if (send_hpd) {
630 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n");
631 drm_fb_helper_hotplug_event(&ifbdev->helper);
632 }
633}
634
635void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
636{
637 struct drm_i915_private *dev_priv = to_i915(dev);
638 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
639 struct fb_info *info;
640
641 if (!ifbdev || !ifbdev->vma)
642 goto set_suspend;
643
644 info = ifbdev->helper.info;
645
646 if (synchronous) {
647 /* Flush any pending work to turn the console on, and then
648 * wait to turn it off. It must be synchronous as we are
649 * about to suspend or unload the driver.
650 *
651 * Note that from within the work-handler, we cannot flush
652 * ourselves, so only flush outstanding work upon suspend!
653 */
654 if (state != FBINFO_STATE_RUNNING)
655 flush_work(&dev_priv->display.fbdev.suspend_work);
656
657 console_lock();
658 } else {
659 /*
660 * The console lock can be pretty contented on resume due
661 * to all the printk activity. Try to keep it out of the hot
662 * path of resume if possible.
663 */
664 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING);
665 if (!console_trylock()) {
666 /* Don't block our own workqueue as this can
667 * be run in parallel with other i915.ko tasks.
668 */
669 schedule_work(&dev_priv->display.fbdev.suspend_work);
670 return;
671 }
672 }
673
674 /* On resume from hibernation: If the object is shmemfs backed, it has
675 * been restored from swap. If the object is stolen however, it will be
676 * full of whatever garbage was left in there.
677 */
678 if (state == FBINFO_STATE_RUNNING &&
679 !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base)))
680 memset_io(info->screen_base, 0, info->screen_size);
681
682 drm_fb_helper_set_suspend(&ifbdev->helper, state);
683 console_unlock();
684
685set_suspend:
686 intel_fbdev_hpd_set_suspend(dev_priv, state);
687}
688
689void intel_fbdev_output_poll_changed(struct drm_device *dev)
690{
691 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev;
692 bool send_hpd;
693
694 if (!ifbdev)
695 return;
696
697 intel_fbdev_sync(ifbdev);
698
699 mutex_lock(&ifbdev->hpd_lock);
700 send_hpd = !ifbdev->hpd_suspended;
701 ifbdev->hpd_waiting = true;
702 mutex_unlock(&ifbdev->hpd_lock);
703
704 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
705 drm_fb_helper_hotplug_event(&ifbdev->helper);
706}
707
708void intel_fbdev_restore_mode(struct drm_device *dev)
709{
710 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev;
711
712 if (!ifbdev)
713 return;
714
715 intel_fbdev_sync(ifbdev);
716 if (!ifbdev->vma)
717 return;
718
719 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
720 intel_fbdev_invalidate(ifbdev);
721}
722
723struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev)
724{
725 if (!fbdev || !fbdev->helper.fb)
726 return NULL;
727
728 return to_intel_framebuffer(fbdev->helper.fb);
729}