1 /* $NetBSD: intel_fbdev.c,v 1.10 2021/12/20 20:34:58 chs Exp $ */
2
3 /*
4 * Copyright © 2007 David Airlie
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 * David Airlie
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: intel_fbdev.c,v 1.10 2021/12/20 20:34:58 chs Exp $");
31
32 #include <linux/async.h>
33 #include <linux/console.h>
34 #include <linux/delay.h>
35 #include <linux/errno.h>
36 #include <linux/init.h>
37 #include <linux/kernel.h>
38 #include <linux/mm.h>
39 #include <linux/module.h>
40 #include <linux/string.h>
41 #include <linux/sysrq.h>
42 #include <linux/tty.h>
43 #include <linux/vga_switcheroo.h>
44
45 #include <drm/drm_crtc.h>
46 #include <drm/drm_fb_helper.h>
47 #include <drm/drm_fourcc.h>
48 #include <drm/i915_drm.h>
49
50 #include "i915_drv.h"
51 #include "intel_display_types.h"
52 #include "intel_fbdev.h"
53 #include "intel_frontbuffer.h"
54
to_frontbuffer(struct intel_fbdev * ifbdev)55 static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev)
56 {
57 return ifbdev->fb->frontbuffer;
58 }
59
intel_fbdev_invalidate(struct intel_fbdev * ifbdev)60 static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
61 {
62 intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU);
63 }
64
65 #ifdef __NetBSD__
66 #include "intelfb.h"
67 #include <linux/nbsd-namespace.h>
68 #endif
69
70 #ifndef __NetBSD__
intel_fbdev_set_par(struct fb_info * info)71 static int intel_fbdev_set_par(struct fb_info *info)
72 {
73 struct drm_fb_helper *fb_helper = info->par;
74 struct intel_fbdev *ifbdev =
75 container_of(fb_helper, struct intel_fbdev, helper);
76 int ret;
77
78 ret = drm_fb_helper_set_par(info);
79 if (ret == 0)
80 intel_fbdev_invalidate(ifbdev);
81
82 return ret;
83 }
84
intel_fbdev_blank(int blank,struct fb_info * info)85 static int intel_fbdev_blank(int blank, struct fb_info *info)
86 {
87 struct drm_fb_helper *fb_helper = info->par;
88 struct intel_fbdev *ifbdev =
89 container_of(fb_helper, struct intel_fbdev, helper);
90 int ret;
91
92 ret = drm_fb_helper_blank(blank, info);
93 if (ret == 0)
94 intel_fbdev_invalidate(ifbdev);
95
96 return ret;
97 }
98
intel_fbdev_pan_display(struct fb_var_screeninfo * var,struct fb_info * info)99 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
100 struct fb_info *info)
101 {
102 struct drm_fb_helper *fb_helper = info->par;
103 struct intel_fbdev *ifbdev =
104 container_of(fb_helper, struct intel_fbdev, helper);
105 int ret;
106
107 ret = drm_fb_helper_pan_display(var, info);
108 if (ret == 0)
109 intel_fbdev_invalidate(ifbdev);
110
111 return ret;
112 }
113
114 static const struct fb_ops intelfb_ops = {
115 .owner = THIS_MODULE,
116 DRM_FB_HELPER_DEFAULT_OPS,
117 .fb_set_par = intel_fbdev_set_par,
118 .fb_fillrect = drm_fb_helper_cfb_fillrect,
119 .fb_copyarea = drm_fb_helper_cfb_copyarea,
120 .fb_imageblit = drm_fb_helper_cfb_imageblit,
121 .fb_pan_display = intel_fbdev_pan_display,
122 .fb_blank = intel_fbdev_blank,
123 };
124 #endif
125
intelfb_alloc(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)126 static int intelfb_alloc(struct drm_fb_helper *helper,
127 struct drm_fb_helper_surface_size *sizes)
128 {
129 struct intel_fbdev *ifbdev =
130 container_of(helper, struct intel_fbdev, helper);
131 struct drm_framebuffer *fb;
132 struct drm_device *dev = helper->dev;
133 struct drm_i915_private *dev_priv = to_i915(dev);
134 struct drm_mode_fb_cmd2 mode_cmd = {};
135 struct drm_i915_gem_object *obj;
136 int size;
137
138 /* we don't do packed 24bpp */
139 if (sizes->surface_bpp == 24)
140 sizes->surface_bpp = 32;
141
142 mode_cmd.width = sizes->surface_width;
143 mode_cmd.height = sizes->surface_height;
144
145 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
146 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
147 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
148 sizes->surface_depth);
149
150 size = mode_cmd.pitches[0] * mode_cmd.height;
151 size = PAGE_ALIGN(size);
152
153 /* If the FB is too big, just don't use it since fbdev is not very
154 * important and we should probably use that space with FBC or other
155 * features. */
156 obj = ERR_PTR(-ENODEV);
157 if (size * 2 < dev_priv->stolen_usable_size)
158 obj = i915_gem_object_create_stolen(dev_priv, size);
159 if (IS_ERR(obj))
160 obj = i915_gem_object_create_shmem(dev_priv, size);
161 if (IS_ERR(obj)) {
162 DRM_ERROR("failed to allocate framebuffer\n");
163 return PTR_ERR(obj);
164 }
165
166 fb = intel_framebuffer_create(obj, &mode_cmd);
167 i915_gem_object_put(obj);
168 if (IS_ERR(fb))
169 return PTR_ERR(fb);
170
171 ifbdev->fb = to_intel_framebuffer(fb);
172 return 0;
173 }
174
175 #ifdef __NetBSD__
176 # define __iomem __i915_vma_iomem
177 #endif
178
intelfb_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)179 static int intelfb_create(struct drm_fb_helper *helper,
180 struct drm_fb_helper_surface_size *sizes)
181 {
182 struct intel_fbdev *ifbdev =
183 container_of(helper, struct intel_fbdev, helper);
184 struct intel_framebuffer *intel_fb = ifbdev->fb;
185 struct drm_device *dev = helper->dev;
186 struct drm_i915_private *dev_priv = to_i915(dev);
187 struct pci_dev *pdev = dev_priv->drm.pdev;
188 struct i915_ggtt *ggtt = &dev_priv->ggtt;
189 const struct i915_ggtt_view view = {
190 .type = I915_GGTT_VIEW_NORMAL,
191 };
192 intel_wakeref_t wakeref;
193 #ifndef __NetBSD__
194 struct fb_info *info;
195 #endif
196 struct i915_vma *vma;
197 unsigned long flags = 0;
198 bool prealloc = false;
199 void __iomem *vaddr;
200 int ret;
201
202 if (intel_fb &&
203 (sizes->fb_width > intel_fb->base.width ||
204 sizes->fb_height > intel_fb->base.height)) {
205 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
206 " releasing it\n",
207 intel_fb->base.width, intel_fb->base.height,
208 sizes->fb_width, sizes->fb_height);
209 drm_framebuffer_put(&intel_fb->base);
210 intel_fb = ifbdev->fb = NULL;
211 }
212 if (!intel_fb || WARN_ON(!intel_fb_obj(&intel_fb->base))) {
213 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
214 ret = intelfb_alloc(helper, sizes);
215 if (ret)
216 return ret;
217 intel_fb = ifbdev->fb;
218 } else {
219 DRM_DEBUG_KMS("re-using BIOS fb\n");
220 prealloc = true;
221 sizes->fb_width = intel_fb->base.width;
222 sizes->fb_height = intel_fb->base.height;
223 }
224
225 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
226
227 /* Pin the GGTT vma for our access via info->screen_base.
228 * This also validates that any existing fb inherited from the
229 * BIOS is suitable for own access.
230 */
231 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base,
232 &view, false, &flags);
233 if (IS_ERR(vma)) {
234 ret = PTR_ERR(vma);
235 goto out_unlock;
236 }
237
238 intel_frontbuffer_flush(to_frontbuffer(ifbdev), ORIGIN_DIRTYFB);
239
240 #ifdef __NetBSD__
241 {
242 static const struct intelfb_attach_args zero_ifa;
243 struct intelfb_attach_args ifa = zero_ifa;
244
245 __USE(ggtt);
246 __USE(pdev);
247
248 vaddr = i915_vma_pin_iomap(vma);
249 if (IS_ERR(vaddr)) {
250 DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
251 ret = PTR_ERR(vaddr);
252 goto out_unpin;
253 }
254
255 if (vma->obj->stolen && !prealloc)
256 memset_io(vaddr, 0, vma->node.size);
257
258 ifa.ifa_drm_dev = dev;
259 ifa.ifa_fb_helper = helper;
260 ifa.ifa_fb_sizes = *sizes;
261 ifa.ifa_fb_vaddr = vaddr;
262
263 /*
264 * XXX Should do this asynchronously, since we hold
265 * dev->struct_mutex.
266 */
267 KERNEL_LOCK(1, NULL);
268 helper->fbdev = config_found(dev->dev, &ifa, NULL,
269 CFARGS(.iattr = "intelfbbus"));
270 KERNEL_UNLOCK_ONE(NULL);
271 if (helper->fbdev == NULL) {
272 DRM_ERROR("unable to attach intelfb\n");
273 ret = -ENXIO;
274 goto out_unpin;
275 }
276 ifbdev->helper.fb = &ifbdev->fb->base;
277 }
278 #else
279 info = drm_fb_helper_alloc_fbi(helper);
280 if (IS_ERR(info)) {
281 DRM_ERROR("Failed to allocate fb_info\n");
282 ret = PTR_ERR(info);
283 goto out_unpin;
284 }
285
286 ifbdev->helper.fb = &ifbdev->fb->base;
287
288 info->fbops = &intelfb_ops;
289
290 /* setup aperture base/size for vesafb takeover */
291 info->apertures->ranges[0].base = ggtt->gmadr.start;
292 info->apertures->ranges[0].size = ggtt->mappable_end;
293
294 /* Our framebuffer is the entirety of fbdev's system memory */
295 info->fix.smem_start =
296 (unsigned long)(ggtt->gmadr.start + vma->node.start);
297 info->fix.smem_len = vma->node.size;
298
299 vaddr = i915_vma_pin_iomap(vma);
300 if (IS_ERR(vaddr)) {
301 DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
302 ret = PTR_ERR(vaddr);
303 goto out_unpin;
304 }
305 info->screen_base = vaddr;
306 info->screen_size = vma->node.size;
307
308 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes);
309
310 /* If the object is shmemfs backed, it will have given us zeroed pages.
311 * If the object is stolen however, it will be full of whatever
312 * garbage was left in there.
313 */
314 if (vma->obj->stolen && !prealloc)
315 memset_io(info->screen_base, 0, info->screen_size);
316 #endif
317
318 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
319
320 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08"PRIx32"\n",
321 ifbdev->fb->base.width, ifbdev->fb->base.height,
322 i915_ggtt_offset(vma));
323 ifbdev->vma = vma;
324 ifbdev->vma_flags = flags;
325
326 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
327 #ifndef __NetBSD__
328 vga_switcheroo_client_fb_set(pdev, info);
329 #endif
330 return 0;
331
332 out_unpin:
333 intel_unpin_fb_vma(vma, flags);
334 out_unlock:
335 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
336 return ret;
337 }
338
339 #ifdef __NetBSD__
340 # undef __iomem
341 #endif
342
343 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
344 .fb_probe = intelfb_create,
345 };
346
intel_fbdev_destroy(struct intel_fbdev * ifbdev)347 static 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 mutex_destroy(&ifbdev->hpd_lock);
363
364 kfree(ifbdev);
365 }
366
367 /*
368 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
369 * The core display code will have read out the current plane configuration,
370 * so we use that to figure out if there's an object for us to use as the
371 * fb, and if so, we re-use it for the fbdev configuration.
372 *
373 * Note we only support a single fb shared across pipes for boot (mostly for
374 * fbcon), so we just find the biggest and use that.
375 */
intel_fbdev_init_bios(struct drm_device * dev,struct intel_fbdev * ifbdev)376 static bool intel_fbdev_init_bios(struct drm_device *dev,
377 struct intel_fbdev *ifbdev)
378 {
379 struct intel_framebuffer *fb = NULL;
380 struct drm_crtc *crtc;
381 struct intel_crtc *intel_crtc;
382 unsigned int max_size = 0;
383
384 /* Find the largest fb */
385 for_each_crtc(dev, crtc) {
386 struct drm_i915_gem_object *obj =
387 intel_fb_obj(crtc->primary->state->fb);
388 intel_crtc = to_intel_crtc(crtc);
389
390 if (!crtc->state->active || !obj) {
391 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
392 pipe_name(intel_crtc->pipe));
393 continue;
394 }
395
396 if (obj->base.size > max_size) {
397 DRM_DEBUG_KMS("found possible fb from plane %c\n",
398 pipe_name(intel_crtc->pipe));
399 fb = to_intel_framebuffer(crtc->primary->state->fb);
400 max_size = obj->base.size;
401 }
402 }
403
404 if (!fb) {
405 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
406 goto out;
407 }
408
409 /* Now make sure all the pipes will fit into it */
410 for_each_crtc(dev, crtc) {
411 unsigned int cur_size;
412
413 intel_crtc = to_intel_crtc(crtc);
414
415 if (!crtc->state->active) {
416 DRM_DEBUG_KMS("pipe %c not active, skipping\n",
417 pipe_name(intel_crtc->pipe));
418 continue;
419 }
420
421 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
422 pipe_name(intel_crtc->pipe));
423
424 /*
425 * See if the plane fb we found above will fit on this
426 * pipe. Note we need to use the selected fb's pitch and bpp
427 * rather than the current pipe's, since they differ.
428 */
429 cur_size = crtc->state->adjusted_mode.crtc_hdisplay;
430 cur_size = cur_size * fb->base.format->cpp[0];
431 if (fb->base.pitches[0] < cur_size) {
432 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
433 pipe_name(intel_crtc->pipe),
434 cur_size, fb->base.pitches[0]);
435 fb = NULL;
436 break;
437 }
438
439 cur_size = crtc->state->adjusted_mode.crtc_vdisplay;
440 cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
441 cur_size *= fb->base.pitches[0];
442 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
443 pipe_name(intel_crtc->pipe),
444 crtc->state->adjusted_mode.crtc_hdisplay,
445 crtc->state->adjusted_mode.crtc_vdisplay,
446 fb->base.format->cpp[0] * 8,
447 cur_size);
448
449 if (cur_size > max_size) {
450 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
451 pipe_name(intel_crtc->pipe),
452 cur_size, max_size);
453 fb = NULL;
454 break;
455 }
456
457 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
458 pipe_name(intel_crtc->pipe),
459 max_size, cur_size);
460 }
461
462 if (!fb) {
463 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
464 goto out;
465 }
466
467 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
468 ifbdev->fb = fb;
469
470 drm_framebuffer_get(&ifbdev->fb->base);
471
472 /* Final pass to check if any active pipes don't have fbs */
473 for_each_crtc(dev, crtc) {
474 intel_crtc = to_intel_crtc(crtc);
475
476 if (!crtc->state->active)
477 continue;
478
479 WARN(!crtc->primary->state->fb,
480 "re-used BIOS config but lost an fb on crtc %d\n",
481 crtc->base.id);
482 }
483
484
485 DRM_DEBUG_KMS("using BIOS fb for initial console\n");
486 return true;
487
488 out:
489
490 return false;
491 }
492
intel_fbdev_suspend_worker(struct work_struct * work)493 static void intel_fbdev_suspend_worker(struct work_struct *work)
494 {
495 #ifndef __NetBSD__ /* XXX fb suspend */
496 intel_fbdev_set_suspend(&container_of(work,
497 struct drm_i915_private,
498 fbdev_suspend_work)->drm,
499 FBINFO_STATE_RUNNING,
500 true);
501 #endif
502 }
503
intel_fbdev_init(struct drm_device * dev)504 int intel_fbdev_init(struct drm_device *dev)
505 {
506 struct drm_i915_private *dev_priv = to_i915(dev);
507 struct intel_fbdev *ifbdev;
508 int ret;
509
510 if (WARN_ON(!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv)))
511 return -ENODEV;
512
513 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
514 if (ifbdev == NULL)
515 return -ENOMEM;
516
517 mutex_init(&ifbdev->hpd_lock);
518 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
519
520 if (!intel_fbdev_init_bios(dev, ifbdev))
521 ifbdev->preferred_bpp = 32;
522
523 ret = drm_fb_helper_init(dev, &ifbdev->helper, 4);
524 if (ret) {
525 kfree(ifbdev);
526 return ret;
527 }
528
529 dev_priv->fbdev = ifbdev;
530 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
531
532 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
533
534 return 0;
535 }
536
intel_fbdev_initial_config(void * data,async_cookie_t cookie)537 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
538 {
539 struct intel_fbdev *ifbdev = data;
540
541 /* Due to peculiar init order wrt to hpd handling this is separate. */
542 if (drm_fb_helper_initial_config(&ifbdev->helper,
543 ifbdev->preferred_bpp))
544 intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
545 }
546
intel_fbdev_initial_config_async(struct drm_device * dev)547 void intel_fbdev_initial_config_async(struct drm_device *dev)
548 {
549 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
550
551 if (!ifbdev)
552 return;
553
554 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
555 }
556
intel_fbdev_sync(struct intel_fbdev * ifbdev)557 static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
558 {
559 if (!ifbdev->cookie)
560 return;
561
562 /* Only serialises with all preceding async calls, hence +1 */
563 async_synchronize_cookie(ifbdev->cookie + 1);
564 ifbdev->cookie = 0;
565 }
566
intel_fbdev_unregister(struct drm_i915_private * dev_priv)567 void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
568 {
569 struct intel_fbdev *ifbdev = dev_priv->fbdev;
570
571 if (!ifbdev)
572 return;
573
574 cancel_work_sync(&dev_priv->fbdev_suspend_work);
575 #ifndef __NetBSD__ /* XXX fb async */
576 if (!current_is_async())
577 #endif
578 intel_fbdev_sync(ifbdev);
579
580 drm_fb_helper_unregister_fbi(&ifbdev->helper);
581 }
582
intel_fbdev_fini(struct drm_i915_private * dev_priv)583 void intel_fbdev_fini(struct drm_i915_private *dev_priv)
584 {
585 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev);
586
587 if (!ifbdev)
588 return;
589
590 intel_fbdev_destroy(ifbdev);
591 }
592
593 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
594 * processing, fbdev will perform a full connector reprobe if a hotplug event
595 * was received while HPD was suspended.
596 */
597 #ifndef __NetBSD__ /* XXX fb suspend */
intel_fbdev_hpd_set_suspend(struct intel_fbdev * ifbdev,int state)598 static void intel_fbdev_hpd_set_suspend(struct intel_fbdev *ifbdev, int state)
599 {
600 bool send_hpd = false;
601
602 mutex_lock(&ifbdev->hpd_lock);
603 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED;
604 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting;
605 ifbdev->hpd_waiting = false;
606 mutex_unlock(&ifbdev->hpd_lock);
607
608 if (send_hpd) {
609 DRM_DEBUG_KMS("Handling delayed fbcon HPD event\n");
610 drm_fb_helper_hotplug_event(&ifbdev->helper);
611 }
612 }
613 #endif /* __NetBSD__ */
614
intel_fbdev_set_suspend(struct drm_device * dev,int state,bool synchronous)615 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
616 {
617 #ifndef __NetBSD__ /* XXX fb suspend */
618 struct drm_i915_private *dev_priv = to_i915(dev);
619 struct intel_fbdev *ifbdev = dev_priv->fbdev;
620 struct fb_info *info;
621
622 if (!ifbdev || !ifbdev->vma)
623 return;
624
625 info = ifbdev->helper.fbdev;
626
627 if (synchronous) {
628 /* Flush any pending work to turn the console on, and then
629 * wait to turn it off. It must be synchronous as we are
630 * about to suspend or unload the driver.
631 *
632 * Note that from within the work-handler, we cannot flush
633 * ourselves, so only flush outstanding work upon suspend!
634 */
635 if (state != FBINFO_STATE_RUNNING)
636 flush_work(&dev_priv->fbdev_suspend_work);
637
638 console_lock();
639 } else {
640 /*
641 * The console lock can be pretty contented on resume due
642 * to all the printk activity. Try to keep it out of the hot
643 * path of resume if possible.
644 */
645 WARN_ON(state != FBINFO_STATE_RUNNING);
646 if (!console_trylock()) {
647 /* Don't block our own workqueue as this can
648 * be run in parallel with other i915.ko tasks.
649 */
650 schedule_work(&dev_priv->fbdev_suspend_work);
651 return;
652 }
653 }
654
655 /* On resume from hibernation: If the object is shmemfs backed, it has
656 * been restored from swap. If the object is stolen however, it will be
657 * full of whatever garbage was left in there.
658 */
659 if (state == FBINFO_STATE_RUNNING &&
660 intel_fb_obj(&ifbdev->fb->base)->stolen)
661 memset_io(info->screen_base, 0, info->screen_size);
662
663 drm_fb_helper_set_suspend(&ifbdev->helper, state);
664 console_unlock();
665
666 intel_fbdev_hpd_set_suspend(ifbdev, state);
667 #endif
668 }
669
intel_fbdev_output_poll_changed(struct drm_device * dev)670 void intel_fbdev_output_poll_changed(struct drm_device *dev)
671 {
672 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
673 bool send_hpd;
674
675 if (!ifbdev)
676 return;
677
678 intel_fbdev_sync(ifbdev);
679
680 mutex_lock(&ifbdev->hpd_lock);
681 send_hpd = !ifbdev->hpd_suspended;
682 ifbdev->hpd_waiting = true;
683 mutex_unlock(&ifbdev->hpd_lock);
684
685 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
686 drm_fb_helper_hotplug_event(&ifbdev->helper);
687 }
688
intel_fbdev_restore_mode(struct drm_device * dev)689 void intel_fbdev_restore_mode(struct drm_device *dev)
690 {
691 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
692
693 if (!ifbdev)
694 return;
695
696 intel_fbdev_sync(ifbdev);
697 if (!ifbdev->vma)
698 return;
699
700 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
701 intel_fbdev_invalidate(ifbdev);
702 }
703