1 | /* |
2 | * Copyright © 2007 David Airlie |
3 | * |
4 | * Permission is hereby granted, free of charge, to any person obtaining a |
5 | * copy of this software and associated documentation files (the "Software"), |
6 | * to deal in the Software without restriction, including without limitation |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
8 | * and/or sell copies of the Software, and to permit persons to whom the |
9 | * Software is furnished to do so, subject to the following conditions: |
10 | * |
11 | * The above copyright notice and this permission notice (including the next |
12 | * paragraph) shall be included in all copies or substantial portions of the |
13 | * Software. |
14 | * |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
21 | * DEALINGS IN THE SOFTWARE. |
22 | * |
23 | * Authors: |
24 | * David Airlie |
25 | */ |
26 | |
27 | #include <linux/async.h> |
28 | #include <linux/console.h> |
29 | #include <linux/delay.h> |
30 | #include <linux/errno.h> |
31 | #include <linux/fb.h> |
32 | #include <linux/init.h> |
33 | #include <linux/kernel.h> |
34 | #include <linux/mm.h> |
35 | #include <linux/module.h> |
36 | #include <linux/string.h> |
37 | #include <linux/sysrq.h> |
38 | #include <linux/tty.h> |
39 | #include <linux/vga_switcheroo.h> |
40 | |
41 | #include <drm/drm_crtc.h> |
42 | #include <drm/drm_fb_helper.h> |
43 | #include <drm/drm_fourcc.h> |
44 | #include <drm/drm_gem_framebuffer_helper.h> |
45 | |
46 | #include "gem/i915_gem_mman.h" |
47 | |
48 | #include "i915_drv.h" |
49 | #include "intel_display_types.h" |
50 | #include "intel_fb.h" |
51 | #include "intel_fb_pin.h" |
52 | #include "intel_fbdev.h" |
53 | #include "intel_fbdev_fb.h" |
54 | #include "intel_frontbuffer.h" |
55 | |
56 | struct intel_fbdev { |
57 | struct drm_fb_helper helper; |
58 | struct intel_framebuffer *fb; |
59 | struct i915_vma *vma; |
60 | unsigned long vma_flags; |
61 | async_cookie_t cookie; |
62 | int preferred_bpp; |
63 | |
64 | /* Whether or not fbdev hpd processing is temporarily suspended */ |
65 | bool hpd_suspended: 1; |
66 | /* Set when a hotplug was received while HPD processing was suspended */ |
67 | bool hpd_waiting: 1; |
68 | |
69 | /* Protects hpd_suspended */ |
70 | struct mutex hpd_lock; |
71 | }; |
72 | |
73 | static struct intel_fbdev *to_intel_fbdev(struct drm_fb_helper *fb_helper) |
74 | { |
75 | return container_of(fb_helper, struct intel_fbdev, helper); |
76 | } |
77 | |
78 | static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev) |
79 | { |
80 | return ifbdev->fb->frontbuffer; |
81 | } |
82 | |
83 | static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev) |
84 | { |
85 | intel_frontbuffer_invalidate(front: to_frontbuffer(ifbdev), origin: ORIGIN_CPU); |
86 | } |
87 | |
88 | FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(intel_fbdev, |
89 | drm_fb_helper_damage_range, |
90 | drm_fb_helper_damage_area) |
91 | |
92 | static int intel_fbdev_set_par(struct fb_info *info) |
93 | { |
94 | struct intel_fbdev *ifbdev = to_intel_fbdev(fb_helper: info->par); |
95 | int ret; |
96 | |
97 | ret = drm_fb_helper_set_par(info); |
98 | if (ret == 0) |
99 | intel_fbdev_invalidate(ifbdev); |
100 | |
101 | return ret; |
102 | } |
103 | |
104 | static int intel_fbdev_blank(int blank, struct fb_info *info) |
105 | { |
106 | struct intel_fbdev *ifbdev = to_intel_fbdev(fb_helper: info->par); |
107 | int ret; |
108 | |
109 | ret = drm_fb_helper_blank(blank, info); |
110 | if (ret == 0) |
111 | intel_fbdev_invalidate(ifbdev); |
112 | |
113 | return ret; |
114 | } |
115 | |
116 | static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, |
117 | struct fb_info *info) |
118 | { |
119 | struct intel_fbdev *ifbdev = to_intel_fbdev(fb_helper: info->par); |
120 | int ret; |
121 | |
122 | ret = drm_fb_helper_pan_display(var, info); |
123 | if (ret == 0) |
124 | intel_fbdev_invalidate(ifbdev); |
125 | |
126 | return ret; |
127 | } |
128 | |
129 | static int intel_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma) |
130 | { |
131 | struct intel_fbdev *fbdev = to_intel_fbdev(fb_helper: info->par); |
132 | struct drm_gem_object *bo = drm_gem_fb_get_obj(fb: &fbdev->fb->base, plane: 0); |
133 | struct drm_i915_gem_object *obj = to_intel_bo(gem: bo); |
134 | |
135 | return i915_gem_fb_mmap(obj, vma); |
136 | } |
137 | |
138 | static const struct fb_ops intelfb_ops = { |
139 | .owner = THIS_MODULE, |
140 | __FB_DEFAULT_DEFERRED_OPS_RDWR(intel_fbdev), |
141 | DRM_FB_HELPER_DEFAULT_OPS, |
142 | .fb_set_par = intel_fbdev_set_par, |
143 | .fb_blank = intel_fbdev_blank, |
144 | .fb_pan_display = intel_fbdev_pan_display, |
145 | __FB_DEFAULT_DEFERRED_OPS_DRAW(intel_fbdev), |
146 | .fb_mmap = intel_fbdev_mmap, |
147 | }; |
148 | |
149 | static int intelfb_create(struct drm_fb_helper *helper, |
150 | struct drm_fb_helper_surface_size *sizes) |
151 | { |
152 | struct intel_fbdev *ifbdev = to_intel_fbdev(fb_helper: helper); |
153 | struct intel_framebuffer *intel_fb = ifbdev->fb; |
154 | struct drm_device *dev = helper->dev; |
155 | struct drm_i915_private *dev_priv = to_i915(dev); |
156 | struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); |
157 | const struct i915_gtt_view view = { |
158 | .type = I915_GTT_VIEW_NORMAL, |
159 | }; |
160 | intel_wakeref_t wakeref; |
161 | struct fb_info *info; |
162 | struct i915_vma *vma; |
163 | unsigned long flags = 0; |
164 | bool prealloc = false; |
165 | struct drm_i915_gem_object *obj; |
166 | int ret; |
167 | |
168 | mutex_lock(&ifbdev->hpd_lock); |
169 | ret = ifbdev->hpd_suspended ? -EAGAIN : 0; |
170 | mutex_unlock(lock: &ifbdev->hpd_lock); |
171 | if (ret) |
172 | return ret; |
173 | |
174 | if (intel_fb && |
175 | (sizes->fb_width > intel_fb->base.width || |
176 | sizes->fb_height > intel_fb->base.height)) { |
177 | drm_dbg_kms(&dev_priv->drm, |
178 | "BIOS fb too small (%dx%d), we require (%dx%d)," |
179 | " releasing it\n" , |
180 | intel_fb->base.width, intel_fb->base.height, |
181 | sizes->fb_width, sizes->fb_height); |
182 | drm_framebuffer_put(fb: &intel_fb->base); |
183 | intel_fb = ifbdev->fb = NULL; |
184 | } |
185 | if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) { |
186 | struct drm_framebuffer *fb; |
187 | drm_dbg_kms(&dev_priv->drm, |
188 | "no BIOS fb, allocating a new one\n" ); |
189 | fb = intel_fbdev_fb_alloc(helper, sizes); |
190 | if (IS_ERR(ptr: fb)) |
191 | return PTR_ERR(ptr: fb); |
192 | intel_fb = ifbdev->fb = to_intel_framebuffer(fb); |
193 | } else { |
194 | drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n" ); |
195 | prealloc = true; |
196 | sizes->fb_width = intel_fb->base.width; |
197 | sizes->fb_height = intel_fb->base.height; |
198 | } |
199 | |
200 | wakeref = intel_runtime_pm_get(rpm: &dev_priv->runtime_pm); |
201 | |
202 | /* Pin the GGTT vma for our access via info->screen_base. |
203 | * This also validates that any existing fb inherited from the |
204 | * BIOS is suitable for own access. |
205 | */ |
206 | vma = intel_pin_and_fence_fb_obj(fb: &ifbdev->fb->base, phys_cursor: false, |
207 | view: &view, uses_fence: false, out_flags: &flags); |
208 | if (IS_ERR(ptr: vma)) { |
209 | ret = PTR_ERR(ptr: vma); |
210 | goto out_unlock; |
211 | } |
212 | |
213 | info = drm_fb_helper_alloc_info(fb_helper: helper); |
214 | if (IS_ERR(ptr: info)) { |
215 | drm_err(&dev_priv->drm, "Failed to allocate fb_info (%pe)\n" , info); |
216 | ret = PTR_ERR(ptr: info); |
217 | goto out_unpin; |
218 | } |
219 | |
220 | ifbdev->helper.fb = &ifbdev->fb->base; |
221 | |
222 | info->fbops = &intelfb_ops; |
223 | |
224 | obj = intel_fb_obj(&intel_fb->base); |
225 | |
226 | ret = intel_fbdev_fb_fill_info(i915: dev_priv, info, obj, vma); |
227 | if (ret) |
228 | goto out_unpin; |
229 | |
230 | drm_fb_helper_fill_info(info, fb_helper: &ifbdev->helper, sizes); |
231 | |
232 | /* If the object is shmemfs backed, it will have given us zeroed pages. |
233 | * If the object is stolen however, it will be full of whatever |
234 | * garbage was left in there. |
235 | */ |
236 | if (!i915_gem_object_is_shmem(obj) && !prealloc) |
237 | memset_io(info->screen_base, 0, info->screen_size); |
238 | |
239 | /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ |
240 | |
241 | drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n" , |
242 | ifbdev->fb->base.width, ifbdev->fb->base.height, |
243 | i915_ggtt_offset(vma)); |
244 | ifbdev->vma = vma; |
245 | ifbdev->vma_flags = flags; |
246 | |
247 | intel_runtime_pm_put(rpm: &dev_priv->runtime_pm, wref: wakeref); |
248 | vga_switcheroo_client_fb_set(dev: pdev, info); |
249 | return 0; |
250 | |
251 | out_unpin: |
252 | intel_unpin_fb_vma(vma, flags); |
253 | out_unlock: |
254 | intel_runtime_pm_put(rpm: &dev_priv->runtime_pm, wref: wakeref); |
255 | return ret; |
256 | } |
257 | |
258 | static int intelfb_dirty(struct drm_fb_helper *helper, struct drm_clip_rect *clip) |
259 | { |
260 | if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2)) |
261 | return 0; |
262 | |
263 | if (helper->fb->funcs->dirty) |
264 | return helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1); |
265 | |
266 | return 0; |
267 | } |
268 | |
269 | static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { |
270 | .fb_probe = intelfb_create, |
271 | .fb_dirty = intelfb_dirty, |
272 | }; |
273 | |
274 | static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) |
275 | { |
276 | /* We rely on the object-free to release the VMA pinning for |
277 | * the info->screen_base mmaping. Leaking the VMA is simpler than |
278 | * trying to rectify all the possible error paths leading here. |
279 | */ |
280 | |
281 | drm_fb_helper_fini(helper: &ifbdev->helper); |
282 | |
283 | if (ifbdev->vma) |
284 | intel_unpin_fb_vma(vma: ifbdev->vma, flags: ifbdev->vma_flags); |
285 | |
286 | if (ifbdev->fb) |
287 | drm_framebuffer_remove(fb: &ifbdev->fb->base); |
288 | |
289 | drm_fb_helper_unprepare(fb_helper: &ifbdev->helper); |
290 | kfree(objp: ifbdev); |
291 | } |
292 | |
293 | /* |
294 | * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. |
295 | * The core display code will have read out the current plane configuration, |
296 | * so we use that to figure out if there's an object for us to use as the |
297 | * fb, and if so, we re-use it for the fbdev configuration. |
298 | * |
299 | * Note we only support a single fb shared across pipes for boot (mostly for |
300 | * fbcon), so we just find the biggest and use that. |
301 | */ |
302 | static bool intel_fbdev_init_bios(struct drm_device *dev, |
303 | struct intel_fbdev *ifbdev) |
304 | { |
305 | struct drm_i915_private *i915 = to_i915(dev); |
306 | struct intel_framebuffer *fb = NULL; |
307 | struct intel_crtc *crtc; |
308 | unsigned int max_size = 0; |
309 | |
310 | /* Find the largest fb */ |
311 | for_each_intel_crtc(dev, crtc) { |
312 | struct intel_crtc_state *crtc_state = |
313 | to_intel_crtc_state(crtc->base.state); |
314 | struct intel_plane *plane = |
315 | to_intel_plane(crtc->base.primary); |
316 | struct intel_plane_state *plane_state = |
317 | to_intel_plane_state(plane->base.state); |
318 | struct drm_i915_gem_object *obj = |
319 | intel_fb_obj(plane_state->uapi.fb); |
320 | |
321 | if (!crtc_state->uapi.active) { |
322 | drm_dbg_kms(&i915->drm, |
323 | "[CRTC:%d:%s] not active, skipping\n" , |
324 | crtc->base.base.id, crtc->base.name); |
325 | continue; |
326 | } |
327 | |
328 | if (!obj) { |
329 | drm_dbg_kms(&i915->drm, |
330 | "[PLANE:%d:%s] no fb, skipping\n" , |
331 | plane->base.base.id, plane->base.name); |
332 | continue; |
333 | } |
334 | |
335 | if (intel_bo_to_drm_bo(obj)->size > max_size) { |
336 | drm_dbg_kms(&i915->drm, |
337 | "found possible fb from [PLANE:%d:%s]\n" , |
338 | plane->base.base.id, plane->base.name); |
339 | fb = to_intel_framebuffer(plane_state->uapi.fb); |
340 | max_size = intel_bo_to_drm_bo(obj)->size; |
341 | } |
342 | } |
343 | |
344 | if (!fb) { |
345 | drm_dbg_kms(&i915->drm, |
346 | "no active fbs found, not using BIOS config\n" ); |
347 | goto out; |
348 | } |
349 | |
350 | /* Now make sure all the pipes will fit into it */ |
351 | for_each_intel_crtc(dev, crtc) { |
352 | struct intel_crtc_state *crtc_state = |
353 | to_intel_crtc_state(crtc->base.state); |
354 | struct intel_plane *plane = |
355 | to_intel_plane(crtc->base.primary); |
356 | unsigned int cur_size; |
357 | |
358 | if (!crtc_state->uapi.active) { |
359 | drm_dbg_kms(&i915->drm, |
360 | "[CRTC:%d:%s] not active, skipping\n" , |
361 | crtc->base.base.id, crtc->base.name); |
362 | continue; |
363 | } |
364 | |
365 | drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n" , |
366 | plane->base.base.id, plane->base.name); |
367 | |
368 | /* |
369 | * See if the plane fb we found above will fit on this |
370 | * pipe. Note we need to use the selected fb's pitch and bpp |
371 | * rather than the current pipe's, since they differ. |
372 | */ |
373 | cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay; |
374 | cur_size = cur_size * fb->base.format->cpp[0]; |
375 | if (fb->base.pitches[0] < cur_size) { |
376 | drm_dbg_kms(&i915->drm, |
377 | "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n" , |
378 | plane->base.base.id, plane->base.name, |
379 | cur_size, fb->base.pitches[0]); |
380 | fb = NULL; |
381 | break; |
382 | } |
383 | |
384 | cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay; |
385 | cur_size = intel_fb_align_height(fb: &fb->base, color_plane: 0, height: cur_size); |
386 | cur_size *= fb->base.pitches[0]; |
387 | drm_dbg_kms(&i915->drm, |
388 | "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n" , |
389 | crtc->base.base.id, crtc->base.name, |
390 | crtc_state->uapi.adjusted_mode.crtc_hdisplay, |
391 | crtc_state->uapi.adjusted_mode.crtc_vdisplay, |
392 | fb->base.format->cpp[0] * 8, |
393 | cur_size); |
394 | |
395 | if (cur_size > max_size) { |
396 | drm_dbg_kms(&i915->drm, |
397 | "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n" , |
398 | plane->base.base.id, plane->base.name, |
399 | cur_size, max_size); |
400 | fb = NULL; |
401 | break; |
402 | } |
403 | |
404 | drm_dbg_kms(&i915->drm, |
405 | "fb big enough [PLANE:%d:%s] (%d >= %d)\n" , |
406 | plane->base.base.id, plane->base.name, |
407 | max_size, cur_size); |
408 | } |
409 | |
410 | if (!fb) { |
411 | drm_dbg_kms(&i915->drm, |
412 | "BIOS fb not suitable for all pipes, not using\n" ); |
413 | goto out; |
414 | } |
415 | |
416 | ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; |
417 | ifbdev->fb = fb; |
418 | |
419 | drm_framebuffer_get(fb: &ifbdev->fb->base); |
420 | |
421 | /* Final pass to check if any active pipes don't have fbs */ |
422 | for_each_intel_crtc(dev, crtc) { |
423 | struct intel_crtc_state *crtc_state = |
424 | to_intel_crtc_state(crtc->base.state); |
425 | struct intel_plane *plane = |
426 | to_intel_plane(crtc->base.primary); |
427 | struct intel_plane_state *plane_state = |
428 | to_intel_plane_state(plane->base.state); |
429 | |
430 | if (!crtc_state->uapi.active) |
431 | continue; |
432 | |
433 | drm_WARN(dev, !plane_state->uapi.fb, |
434 | "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n" , |
435 | plane->base.base.id, plane->base.name); |
436 | } |
437 | |
438 | |
439 | drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n" ); |
440 | return true; |
441 | |
442 | out: |
443 | |
444 | return false; |
445 | } |
446 | |
447 | static void intel_fbdev_suspend_worker(struct work_struct *work) |
448 | { |
449 | intel_fbdev_set_suspend(dev: &container_of(work, |
450 | struct drm_i915_private, |
451 | display.fbdev.suspend_work)->drm, |
452 | FBINFO_STATE_RUNNING, |
453 | synchronous: true); |
454 | } |
455 | |
456 | int intel_fbdev_init(struct drm_device *dev) |
457 | { |
458 | struct drm_i915_private *dev_priv = to_i915(dev); |
459 | struct intel_fbdev *ifbdev; |
460 | int ret; |
461 | |
462 | if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv))) |
463 | return -ENODEV; |
464 | |
465 | ifbdev = kzalloc(size: sizeof(struct intel_fbdev), GFP_KERNEL); |
466 | if (ifbdev == NULL) |
467 | return -ENOMEM; |
468 | |
469 | mutex_init(&ifbdev->hpd_lock); |
470 | drm_fb_helper_prepare(dev, helper: &ifbdev->helper, preferred_bpp: 32, funcs: &intel_fb_helper_funcs); |
471 | |
472 | if (intel_fbdev_init_bios(dev, ifbdev)) |
473 | ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp; |
474 | else |
475 | ifbdev->preferred_bpp = ifbdev->helper.preferred_bpp; |
476 | |
477 | ret = drm_fb_helper_init(dev, helper: &ifbdev->helper); |
478 | if (ret) { |
479 | kfree(objp: ifbdev); |
480 | return ret; |
481 | } |
482 | |
483 | dev_priv->display.fbdev.fbdev = ifbdev; |
484 | INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker); |
485 | |
486 | return 0; |
487 | } |
488 | |
489 | static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) |
490 | { |
491 | struct intel_fbdev *ifbdev = data; |
492 | |
493 | /* Due to peculiar init order wrt to hpd handling this is separate. */ |
494 | if (drm_fb_helper_initial_config(fb_helper: &ifbdev->helper)) |
495 | intel_fbdev_unregister(dev_priv: to_i915(dev: ifbdev->helper.dev)); |
496 | } |
497 | |
498 | void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv) |
499 | { |
500 | struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; |
501 | |
502 | if (!ifbdev) |
503 | return; |
504 | |
505 | ifbdev->cookie = async_schedule(func: intel_fbdev_initial_config, data: ifbdev); |
506 | } |
507 | |
508 | static void intel_fbdev_sync(struct intel_fbdev *ifbdev) |
509 | { |
510 | if (!ifbdev->cookie) |
511 | return; |
512 | |
513 | /* Only serialises with all preceding async calls, hence +1 */ |
514 | async_synchronize_cookie(cookie: ifbdev->cookie + 1); |
515 | ifbdev->cookie = 0; |
516 | } |
517 | |
518 | void intel_fbdev_unregister(struct drm_i915_private *dev_priv) |
519 | { |
520 | struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; |
521 | |
522 | if (!ifbdev) |
523 | return; |
524 | |
525 | intel_fbdev_set_suspend(dev: &dev_priv->drm, FBINFO_STATE_SUSPENDED, synchronous: true); |
526 | |
527 | if (!current_is_async()) |
528 | intel_fbdev_sync(ifbdev); |
529 | |
530 | drm_fb_helper_unregister_info(fb_helper: &ifbdev->helper); |
531 | } |
532 | |
533 | void intel_fbdev_fini(struct drm_i915_private *dev_priv) |
534 | { |
535 | struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev); |
536 | |
537 | if (!ifbdev) |
538 | return; |
539 | |
540 | intel_fbdev_destroy(ifbdev); |
541 | } |
542 | |
543 | /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD |
544 | * processing, fbdev will perform a full connector reprobe if a hotplug event |
545 | * was received while HPD was suspended. |
546 | */ |
547 | static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state) |
548 | { |
549 | struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev; |
550 | bool send_hpd = false; |
551 | |
552 | mutex_lock(&ifbdev->hpd_lock); |
553 | ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED; |
554 | send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting; |
555 | ifbdev->hpd_waiting = false; |
556 | mutex_unlock(lock: &ifbdev->hpd_lock); |
557 | |
558 | if (send_hpd) { |
559 | drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n" ); |
560 | drm_fb_helper_hotplug_event(fb_helper: &ifbdev->helper); |
561 | } |
562 | } |
563 | |
564 | void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) |
565 | { |
566 | struct drm_i915_private *dev_priv = to_i915(dev); |
567 | struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; |
568 | struct fb_info *info; |
569 | |
570 | if (!ifbdev) |
571 | return; |
572 | |
573 | if (drm_WARN_ON(&dev_priv->drm, !HAS_DISPLAY(dev_priv))) |
574 | return; |
575 | |
576 | if (!ifbdev->vma) |
577 | goto set_suspend; |
578 | |
579 | info = ifbdev->helper.info; |
580 | |
581 | if (synchronous) { |
582 | /* Flush any pending work to turn the console on, and then |
583 | * wait to turn it off. It must be synchronous as we are |
584 | * about to suspend or unload the driver. |
585 | * |
586 | * Note that from within the work-handler, we cannot flush |
587 | * ourselves, so only flush outstanding work upon suspend! |
588 | */ |
589 | if (state != FBINFO_STATE_RUNNING) |
590 | flush_work(work: &dev_priv->display.fbdev.suspend_work); |
591 | |
592 | console_lock(); |
593 | } else { |
594 | /* |
595 | * The console lock can be pretty contented on resume due |
596 | * to all the printk activity. Try to keep it out of the hot |
597 | * path of resume if possible. |
598 | */ |
599 | drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING); |
600 | if (!console_trylock()) { |
601 | /* Don't block our own workqueue as this can |
602 | * be run in parallel with other i915.ko tasks. |
603 | */ |
604 | queue_work(wq: dev_priv->unordered_wq, |
605 | work: &dev_priv->display.fbdev.suspend_work); |
606 | return; |
607 | } |
608 | } |
609 | |
610 | /* On resume from hibernation: If the object is shmemfs backed, it has |
611 | * been restored from swap. If the object is stolen however, it will be |
612 | * full of whatever garbage was left in there. |
613 | */ |
614 | if (state == FBINFO_STATE_RUNNING && |
615 | !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base))) |
616 | memset_io(info->screen_base, 0, info->screen_size); |
617 | |
618 | drm_fb_helper_set_suspend(fb_helper: &ifbdev->helper, suspend: state); |
619 | console_unlock(); |
620 | |
621 | set_suspend: |
622 | intel_fbdev_hpd_set_suspend(i915: dev_priv, state); |
623 | } |
624 | |
625 | void intel_fbdev_output_poll_changed(struct drm_device *dev) |
626 | { |
627 | struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; |
628 | bool send_hpd; |
629 | |
630 | if (!ifbdev) |
631 | return; |
632 | |
633 | intel_fbdev_sync(ifbdev); |
634 | |
635 | mutex_lock(&ifbdev->hpd_lock); |
636 | send_hpd = !ifbdev->hpd_suspended; |
637 | ifbdev->hpd_waiting = true; |
638 | mutex_unlock(lock: &ifbdev->hpd_lock); |
639 | |
640 | if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup)) |
641 | drm_fb_helper_hotplug_event(fb_helper: &ifbdev->helper); |
642 | } |
643 | |
644 | void intel_fbdev_restore_mode(struct drm_i915_private *dev_priv) |
645 | { |
646 | struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; |
647 | |
648 | if (!ifbdev) |
649 | return; |
650 | |
651 | intel_fbdev_sync(ifbdev); |
652 | if (!ifbdev->vma) |
653 | return; |
654 | |
655 | if (drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper: &ifbdev->helper) == 0) |
656 | intel_fbdev_invalidate(ifbdev); |
657 | } |
658 | |
659 | struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev) |
660 | { |
661 | if (!fbdev || !fbdev->helper.fb) |
662 | return NULL; |
663 | |
664 | return to_intel_framebuffer(fbdev->helper.fb); |
665 | } |
666 | |