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 53 struct 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 70 static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev) 71 { 72 return ifbdev->fb->frontbuffer; 73 } 74 75 static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev) 76 { 77 intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU); 78 } 79 80 static 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 94 static 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 } 107 108 static 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 } 122 123 static 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 }; 135 136 static 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->dsm.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 } 192 193 static 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 struct i915_gem_ww_ctx ww; 214 int ret; 215 216 mutex_lock(&ifbdev->hpd_lock); 217 ret = ifbdev->hpd_suspended ? -EAGAIN : 0; 218 mutex_unlock(&ifbdev->hpd_lock); 219 if (ret) 220 return ret; 221 222 if (intel_fb && 223 (sizes->fb_width > intel_fb->base.width || 224 sizes->fb_height > intel_fb->base.height)) { 225 drm_dbg_kms(&dev_priv->drm, 226 "BIOS fb too small (%dx%d), we require (%dx%d)," 227 " releasing it\n", 228 intel_fb->base.width, intel_fb->base.height, 229 sizes->fb_width, sizes->fb_height); 230 drm_framebuffer_put(&intel_fb->base); 231 intel_fb = ifbdev->fb = NULL; 232 } 233 if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) { 234 drm_dbg_kms(&dev_priv->drm, 235 "no BIOS fb, allocating a new one\n"); 236 ret = intelfb_alloc(helper, sizes); 237 if (ret) 238 return ret; 239 intel_fb = ifbdev->fb; 240 } else { 241 drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n"); 242 prealloc = true; 243 sizes->fb_width = intel_fb->base.width; 244 sizes->fb_height = intel_fb->base.height; 245 } 246 247 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm); 248 249 /* Pin the GGTT vma for our access via info->screen_base. 250 * This also validates that any existing fb inherited from the 251 * BIOS is suitable for own access. 252 */ 253 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false, 254 &view, false, &flags); 255 if (IS_ERR(vma)) { 256 ret = PTR_ERR(vma); 257 goto out_unlock; 258 } 259 260 info = drm_fb_helper_alloc_info(helper); 261 if (IS_ERR(info)) { 262 drm_err(&dev_priv->drm, "Failed to allocate fb_info (%pe)\n", info); 263 ret = PTR_ERR(info); 264 goto out_unpin; 265 } 266 267 ifbdev->helper.fb = &ifbdev->fb->base; 268 269 info->fbops = &intelfb_ops; 270 271 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 /* Use fbdev's framebuffer from lmem for discrete */ 276 info->fix.smem_start = 277 (unsigned long)(mem->io_start + 278 i915_gem_object_get_dma_address(obj, 0)); 279 info->fix.smem_len = obj->base.size; 280 } else { 281 /* Our framebuffer is the entirety of fbdev's system memory */ 282 info->fix.smem_start = 283 (unsigned long)(ggtt->gmadr.start + i915_ggtt_offset(vma)); 284 info->fix.smem_len = vma->size; 285 } 286 287 for_i915_gem_ww(&ww, ret, false) { 288 ret = i915_gem_object_lock(vma->obj, &ww); 289 290 if (ret) 291 continue; 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 continue; 299 } 300 } 301 302 if (ret) 303 goto out_unpin; 304 305 info->screen_base = vaddr; 306 info->screen_size = vma->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 (!i915_gem_object_is_shmem(vma->obj) && !prealloc) 315 memset_io(info->screen_base, 0, info->screen_size); 316 317 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 318 319 drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n", 320 ifbdev->fb->base.width, ifbdev->fb->base.height, 321 i915_ggtt_offset(vma)); 322 ifbdev->vma = vma; 323 ifbdev->vma_flags = flags; 324 325 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 326 vga_switcheroo_client_fb_set(pdev, info); 327 return 0; 328 329 out_unpin: 330 intel_unpin_fb_vma(vma, flags); 331 out_unlock: 332 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 333 return ret; 334 } 335 336 static int intelfb_dirty(struct drm_fb_helper *helper, struct drm_clip_rect *clip) 337 { 338 if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2)) 339 return 0; 340 341 if (helper->fb->funcs->dirty) 342 return helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1); 343 344 return 0; 345 } 346 347 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 348 .fb_probe = intelfb_create, 349 .fb_dirty = intelfb_dirty, 350 }; 351 352 static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) 353 { 354 /* We rely on the object-free to release the VMA pinning for 355 * the info->screen_base mmaping. Leaking the VMA is simpler than 356 * trying to rectify all the possible error paths leading here. 357 */ 358 359 drm_fb_helper_fini(&ifbdev->helper); 360 361 if (ifbdev->vma) 362 intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags); 363 364 if (ifbdev->fb) 365 drm_framebuffer_remove(&ifbdev->fb->base); 366 367 drm_fb_helper_unprepare(&ifbdev->helper); 368 kfree(ifbdev); 369 } 370 371 /* 372 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 373 * The core display code will have read out the current plane configuration, 374 * so we use that to figure out if there's an object for us to use as the 375 * fb, and if so, we re-use it for the fbdev configuration. 376 * 377 * Note we only support a single fb shared across pipes for boot (mostly for 378 * fbcon), so we just find the biggest and use that. 379 */ 380 static bool intel_fbdev_init_bios(struct drm_device *dev, 381 struct intel_fbdev *ifbdev) 382 { 383 struct drm_i915_private *i915 = to_i915(dev); 384 struct intel_framebuffer *fb = NULL; 385 struct intel_crtc *crtc; 386 unsigned int max_size = 0; 387 388 /* Find the largest fb */ 389 for_each_intel_crtc(dev, crtc) { 390 struct intel_crtc_state *crtc_state = 391 to_intel_crtc_state(crtc->base.state); 392 struct intel_plane *plane = 393 to_intel_plane(crtc->base.primary); 394 struct intel_plane_state *plane_state = 395 to_intel_plane_state(plane->base.state); 396 struct drm_i915_gem_object *obj = 397 intel_fb_obj(plane_state->uapi.fb); 398 399 if (!crtc_state->uapi.active) { 400 drm_dbg_kms(&i915->drm, 401 "[CRTC:%d:%s] not active, skipping\n", 402 crtc->base.base.id, crtc->base.name); 403 continue; 404 } 405 406 if (!obj) { 407 drm_dbg_kms(&i915->drm, 408 "[PLANE:%d:%s] no fb, skipping\n", 409 plane->base.base.id, plane->base.name); 410 continue; 411 } 412 413 if (obj->base.size > max_size) { 414 drm_dbg_kms(&i915->drm, 415 "found possible fb from [PLANE:%d:%s]\n", 416 plane->base.base.id, plane->base.name); 417 fb = to_intel_framebuffer(plane_state->uapi.fb); 418 max_size = obj->base.size; 419 } 420 } 421 422 if (!fb) { 423 drm_dbg_kms(&i915->drm, 424 "no active fbs found, not using BIOS config\n"); 425 goto out; 426 } 427 428 /* Now make sure all the pipes will fit into it */ 429 for_each_intel_crtc(dev, crtc) { 430 struct intel_crtc_state *crtc_state = 431 to_intel_crtc_state(crtc->base.state); 432 struct intel_plane *plane = 433 to_intel_plane(crtc->base.primary); 434 unsigned int cur_size; 435 436 if (!crtc_state->uapi.active) { 437 drm_dbg_kms(&i915->drm, 438 "[CRTC:%d:%s] not active, skipping\n", 439 crtc->base.base.id, crtc->base.name); 440 continue; 441 } 442 443 drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n", 444 plane->base.base.id, plane->base.name); 445 446 /* 447 * See if the plane fb we found above will fit on this 448 * pipe. Note we need to use the selected fb's pitch and bpp 449 * rather than the current pipe's, since they differ. 450 */ 451 cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay; 452 cur_size = cur_size * fb->base.format->cpp[0]; 453 if (fb->base.pitches[0] < cur_size) { 454 drm_dbg_kms(&i915->drm, 455 "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n", 456 plane->base.base.id, plane->base.name, 457 cur_size, fb->base.pitches[0]); 458 fb = NULL; 459 break; 460 } 461 462 cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay; 463 cur_size = intel_fb_align_height(&fb->base, 0, cur_size); 464 cur_size *= fb->base.pitches[0]; 465 drm_dbg_kms(&i915->drm, 466 "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n", 467 crtc->base.base.id, crtc->base.name, 468 crtc_state->uapi.adjusted_mode.crtc_hdisplay, 469 crtc_state->uapi.adjusted_mode.crtc_vdisplay, 470 fb->base.format->cpp[0] * 8, 471 cur_size); 472 473 if (cur_size > max_size) { 474 drm_dbg_kms(&i915->drm, 475 "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n", 476 plane->base.base.id, plane->base.name, 477 cur_size, max_size); 478 fb = NULL; 479 break; 480 } 481 482 drm_dbg_kms(&i915->drm, 483 "fb big enough [PLANE:%d:%s] (%d >= %d)\n", 484 plane->base.base.id, plane->base.name, 485 max_size, cur_size); 486 } 487 488 if (!fb) { 489 drm_dbg_kms(&i915->drm, 490 "BIOS fb not suitable for all pipes, not using\n"); 491 goto out; 492 } 493 494 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; 495 ifbdev->fb = fb; 496 497 drm_framebuffer_get(&ifbdev->fb->base); 498 499 /* Final pass to check if any active pipes don't have fbs */ 500 for_each_intel_crtc(dev, crtc) { 501 struct intel_crtc_state *crtc_state = 502 to_intel_crtc_state(crtc->base.state); 503 struct intel_plane *plane = 504 to_intel_plane(crtc->base.primary); 505 struct intel_plane_state *plane_state = 506 to_intel_plane_state(plane->base.state); 507 508 if (!crtc_state->uapi.active) 509 continue; 510 511 drm_WARN(dev, !plane_state->uapi.fb, 512 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n", 513 plane->base.base.id, plane->base.name); 514 } 515 516 517 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n"); 518 return true; 519 520 out: 521 522 return false; 523 } 524 525 static void intel_fbdev_suspend_worker(struct work_struct *work) 526 { 527 intel_fbdev_set_suspend(&container_of(work, 528 struct drm_i915_private, 529 display.fbdev.suspend_work)->drm, 530 FBINFO_STATE_RUNNING, 531 true); 532 } 533 534 int intel_fbdev_init(struct drm_device *dev) 535 { 536 struct drm_i915_private *dev_priv = to_i915(dev); 537 struct intel_fbdev *ifbdev; 538 int ret; 539 540 if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv))) 541 return -ENODEV; 542 543 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 544 if (ifbdev == NULL) 545 return -ENOMEM; 546 547 mutex_init(&ifbdev->hpd_lock); 548 drm_fb_helper_prepare(dev, &ifbdev->helper, 32, &intel_fb_helper_funcs); 549 550 if (intel_fbdev_init_bios(dev, ifbdev)) 551 ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp; 552 else 553 ifbdev->preferred_bpp = ifbdev->helper.preferred_bpp; 554 555 ret = drm_fb_helper_init(dev, &ifbdev->helper); 556 if (ret) { 557 kfree(ifbdev); 558 return ret; 559 } 560 561 dev_priv->display.fbdev.fbdev = ifbdev; 562 INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker); 563 564 return 0; 565 } 566 567 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 568 { 569 struct intel_fbdev *ifbdev = data; 570 571 /* Due to peculiar init order wrt to hpd handling this is separate. */ 572 if (drm_fb_helper_initial_config(&ifbdev->helper)) 573 intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); 574 } 575 576 void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv) 577 { 578 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 579 580 if (!ifbdev) 581 return; 582 583 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 584 } 585 586 static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 587 { 588 if (!ifbdev->cookie) 589 return; 590 591 /* Only serialises with all preceding async calls, hence +1 */ 592 async_synchronize_cookie(ifbdev->cookie + 1); 593 ifbdev->cookie = 0; 594 } 595 596 void intel_fbdev_unregister(struct drm_i915_private *dev_priv) 597 { 598 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 599 600 if (!ifbdev) 601 return; 602 603 intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true); 604 605 if (!current_is_async()) 606 intel_fbdev_sync(ifbdev); 607 608 drm_fb_helper_unregister_info(&ifbdev->helper); 609 } 610 611 void intel_fbdev_fini(struct drm_i915_private *dev_priv) 612 { 613 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev); 614 615 if (!ifbdev) 616 return; 617 618 intel_fbdev_destroy(ifbdev); 619 } 620 621 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD 622 * processing, fbdev will perform a full connector reprobe if a hotplug event 623 * was received while HPD was suspended. 624 */ 625 static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state) 626 { 627 struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev; 628 bool send_hpd = false; 629 630 mutex_lock(&ifbdev->hpd_lock); 631 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED; 632 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting; 633 ifbdev->hpd_waiting = false; 634 mutex_unlock(&ifbdev->hpd_lock); 635 636 if (send_hpd) { 637 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n"); 638 drm_fb_helper_hotplug_event(&ifbdev->helper); 639 } 640 } 641 642 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 643 { 644 struct drm_i915_private *dev_priv = to_i915(dev); 645 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 646 struct fb_info *info; 647 648 if (!ifbdev) 649 return; 650 651 if (drm_WARN_ON(&dev_priv->drm, !HAS_DISPLAY(dev_priv))) 652 return; 653 654 if (!ifbdev->vma) 655 goto set_suspend; 656 657 info = ifbdev->helper.info; 658 659 if (synchronous) { 660 /* Flush any pending work to turn the console on, and then 661 * wait to turn it off. It must be synchronous as we are 662 * about to suspend or unload the driver. 663 * 664 * Note that from within the work-handler, we cannot flush 665 * ourselves, so only flush outstanding work upon suspend! 666 */ 667 if (state != FBINFO_STATE_RUNNING) 668 flush_work(&dev_priv->display.fbdev.suspend_work); 669 670 console_lock(); 671 } else { 672 /* 673 * The console lock can be pretty contented on resume due 674 * to all the printk activity. Try to keep it out of the hot 675 * path of resume if possible. 676 */ 677 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING); 678 if (!console_trylock()) { 679 /* Don't block our own workqueue as this can 680 * be run in parallel with other i915.ko tasks. 681 */ 682 schedule_work(&dev_priv->display.fbdev.suspend_work); 683 return; 684 } 685 } 686 687 /* On resume from hibernation: If the object is shmemfs backed, it has 688 * been restored from swap. If the object is stolen however, it will be 689 * full of whatever garbage was left in there. 690 */ 691 if (state == FBINFO_STATE_RUNNING && 692 !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base))) 693 memset_io(info->screen_base, 0, info->screen_size); 694 695 drm_fb_helper_set_suspend(&ifbdev->helper, state); 696 console_unlock(); 697 698 set_suspend: 699 intel_fbdev_hpd_set_suspend(dev_priv, state); 700 } 701 702 void intel_fbdev_output_poll_changed(struct drm_device *dev) 703 { 704 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 705 bool send_hpd; 706 707 if (!ifbdev) 708 return; 709 710 intel_fbdev_sync(ifbdev); 711 712 mutex_lock(&ifbdev->hpd_lock); 713 send_hpd = !ifbdev->hpd_suspended; 714 ifbdev->hpd_waiting = true; 715 mutex_unlock(&ifbdev->hpd_lock); 716 717 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup)) 718 drm_fb_helper_hotplug_event(&ifbdev->helper); 719 } 720 721 void intel_fbdev_restore_mode(struct drm_i915_private *dev_priv) 722 { 723 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 724 725 if (!ifbdev) 726 return; 727 728 intel_fbdev_sync(ifbdev); 729 if (!ifbdev->vma) 730 return; 731 732 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) 733 intel_fbdev_invalidate(ifbdev); 734 } 735 736 struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev) 737 { 738 if (!fbdev || !fbdev->helper.fb) 739 return NULL; 740 741 return to_intel_framebuffer(fbdev->helper.fb); 742 } 743