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_lmem.h" 47#include "gem/i915_gem_mman.h" 48 49#include "i915_drv.h" 50#include "intel_display_types.h" 51#include "intel_fb.h" 52#include "intel_fb_pin.h" 53#include "intel_fbdev.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 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 73static 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 78static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev) 79{ 80 return ifbdev->fb->frontbuffer; 81} 82 83static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev) 84{ 85 intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU); 86} 87 88FB_GEN_DEFAULT_DEFERRED_IOMEM_OPS(intel_fbdev, 89 drm_fb_helper_damage_range, 90 drm_fb_helper_damage_area) 91 92static int intel_fbdev_set_par(struct fb_info *info) 93{ 94 struct intel_fbdev *ifbdev = to_intel_fbdev(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 104static int intel_fbdev_blank(int blank, struct fb_info *info) 105{ 106 struct intel_fbdev *ifbdev = to_intel_fbdev(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 116static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 117 struct fb_info *info) 118{ 119 struct intel_fbdev *ifbdev = to_intel_fbdev(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 129static int intel_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma) 130{ 131 struct intel_fbdev *fbdev = to_intel_fbdev(info->par); 132 struct drm_gem_object *bo = drm_gem_fb_get_obj(&fbdev->fb->base, 0); 133 struct drm_i915_gem_object *obj = to_intel_bo(bo); 134 135 return i915_gem_fb_mmap(obj, vma); 136} 137 138static 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 149static int intelfb_alloc(struct drm_fb_helper *helper, 150 struct drm_fb_helper_surface_size *sizes) 151{ 152 struct intel_fbdev *ifbdev = to_intel_fbdev(helper); 153 struct drm_framebuffer *fb; 154 struct drm_device *dev = helper->dev; 155 struct drm_i915_private *dev_priv = to_i915(dev); 156 struct drm_mode_fb_cmd2 mode_cmd = {}; 157 struct drm_i915_gem_object *obj; 158 int size; 159 160 /* we don't do packed 24bpp */ 161 if (sizes->surface_bpp == 24) 162 sizes->surface_bpp = 32; 163 164 mode_cmd.width = sizes->surface_width; 165 mode_cmd.height = sizes->surface_height; 166 167 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 168 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 169 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 170 sizes->surface_depth); 171 172 size = mode_cmd.pitches[0] * mode_cmd.height; 173 size = PAGE_ALIGN(size); 174 175 obj = ERR_PTR(-ENODEV); 176 if (HAS_LMEM(dev_priv)) { 177 obj = i915_gem_object_create_lmem(dev_priv, size, 178 I915_BO_ALLOC_CONTIGUOUS | 179 I915_BO_ALLOC_USER); 180 } else { 181 /* 182 * If the FB is too big, just don't use it since fbdev is not very 183 * important and we should probably use that space with FBC or other 184 * features. 185 * 186 * Also skip stolen on MTL as Wa_22018444074 mitigation. 187 */ 188 if (!(IS_METEORLAKE(dev_priv)) && size * 2 < dev_priv->dsm.usable_size) 189 obj = i915_gem_object_create_stolen(dev_priv, size); 190 if (IS_ERR(obj)) 191 obj = i915_gem_object_create_shmem(dev_priv, size); 192 } 193 194 if (IS_ERR(obj)) { 195 drm_err(&dev_priv->drm, "failed to allocate framebuffer (%pe)\n", obj); 196 return PTR_ERR(obj); 197 } 198 199 fb = intel_framebuffer_create(obj, &mode_cmd); 200 i915_gem_object_put(obj); 201 if (IS_ERR(fb)) 202 return PTR_ERR(fb); 203 204 ifbdev->fb = to_intel_framebuffer(fb); 205 return 0; 206} 207 208static int intelfb_create(struct drm_fb_helper *helper, 209 struct drm_fb_helper_surface_size *sizes) 210{ 211 struct intel_fbdev *ifbdev = to_intel_fbdev(helper); 212 struct intel_framebuffer *intel_fb = ifbdev->fb; 213 struct drm_device *dev = helper->dev; 214 struct drm_i915_private *dev_priv = to_i915(dev); 215 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 216 struct i915_ggtt *ggtt = to_gt(dev_priv)->ggtt; 217 const struct i915_gtt_view view = { 218 .type = I915_GTT_VIEW_NORMAL, 219 }; 220 intel_wakeref_t wakeref; 221 struct fb_info *info; 222 struct i915_vma *vma; 223 unsigned long flags = 0; 224 bool prealloc = false; 225 void __iomem *vaddr; 226 struct drm_i915_gem_object *obj; 227 struct i915_gem_ww_ctx ww; 228 int ret; 229 230 mutex_lock(&ifbdev->hpd_lock); 231 ret = ifbdev->hpd_suspended ? -EAGAIN : 0; 232 mutex_unlock(&ifbdev->hpd_lock); 233 if (ret) 234 return ret; 235 236 if (intel_fb && 237 (sizes->fb_width > intel_fb->base.width || 238 sizes->fb_height > intel_fb->base.height)) { 239 drm_dbg_kms(&dev_priv->drm, 240 "BIOS fb too small (%dx%d), we require (%dx%d)," 241 " releasing it\n", 242 intel_fb->base.width, intel_fb->base.height, 243 sizes->fb_width, sizes->fb_height); 244 drm_framebuffer_put(&intel_fb->base); 245 intel_fb = ifbdev->fb = NULL; 246 } 247 if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) { 248 drm_dbg_kms(&dev_priv->drm, 249 "no BIOS fb, allocating a new one\n"); 250 ret = intelfb_alloc(helper, sizes); 251 if (ret) 252 return ret; 253 intel_fb = ifbdev->fb; 254 } else { 255 drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n"); 256 prealloc = true; 257 sizes->fb_width = intel_fb->base.width; 258 sizes->fb_height = intel_fb->base.height; 259 } 260 261 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm); 262 263 /* Pin the GGTT vma for our access via info->screen_base. 264 * This also validates that any existing fb inherited from the 265 * BIOS is suitable for own access. 266 */ 267 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false, 268 &view, false, &flags); 269 if (IS_ERR(vma)) { 270 ret = PTR_ERR(vma); 271 goto out_unlock; 272 } 273 274 info = drm_fb_helper_alloc_info(helper); 275 if (IS_ERR(info)) { 276 drm_err(&dev_priv->drm, "Failed to allocate fb_info (%pe)\n", info); 277 ret = PTR_ERR(info); 278 goto out_unpin; 279 } 280 281 ifbdev->helper.fb = &ifbdev->fb->base; 282 283 info->fbops = &intelfb_ops; 284 285 obj = intel_fb_obj(&intel_fb->base); 286 if (i915_gem_object_is_lmem(obj)) { 287 struct intel_memory_region *mem = obj->mm.region; 288 289 /* Use fbdev's framebuffer from lmem for discrete */ 290 info->fix.smem_start = 291 (unsigned long)(mem->io_start + 292 i915_gem_object_get_dma_address(obj, 0)); 293 info->fix.smem_len = obj->base.size; 294 } else { 295 /* Our framebuffer is the entirety of fbdev's system memory */ 296 info->fix.smem_start = 297 (unsigned long)(ggtt->gmadr.start + i915_ggtt_offset(vma)); 298 info->fix.smem_len = vma->size; 299 } 300 301 for_i915_gem_ww(&ww, ret, false) { 302 ret = i915_gem_object_lock(vma->obj, &ww); 303 304 if (ret) 305 continue; 306 307 vaddr = i915_vma_pin_iomap(vma); 308 if (IS_ERR(vaddr)) { 309 drm_err(&dev_priv->drm, 310 "Failed to remap framebuffer into virtual memory (%pe)\n", vaddr); 311 ret = PTR_ERR(vaddr); 312 continue; 313 } 314 } 315 316 if (ret) 317 goto out_unpin; 318 319 info->screen_base = vaddr; 320 info->screen_size = vma->size; 321 322 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes); 323 324 /* If the object is shmemfs backed, it will have given us zeroed pages. 325 * If the object is stolen however, it will be full of whatever 326 * garbage was left in there. 327 */ 328 if (!i915_gem_object_is_shmem(vma->obj) && !prealloc) 329 memset_io(info->screen_base, 0, info->screen_size); 330 331 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 332 333 drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n", 334 ifbdev->fb->base.width, ifbdev->fb->base.height, 335 i915_ggtt_offset(vma)); 336 ifbdev->vma = vma; 337 ifbdev->vma_flags = flags; 338 339 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 340 vga_switcheroo_client_fb_set(pdev, info); 341 return 0; 342 343out_unpin: 344 intel_unpin_fb_vma(vma, flags); 345out_unlock: 346 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 347 return ret; 348} 349 350static int intelfb_dirty(struct drm_fb_helper *helper, struct drm_clip_rect *clip) 351{ 352 if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2)) 353 return 0; 354 355 if (helper->fb->funcs->dirty) 356 return helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1); 357 358 return 0; 359} 360 361static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 362 .fb_probe = intelfb_create, 363 .fb_dirty = intelfb_dirty, 364}; 365 366static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) 367{ 368 /* We rely on the object-free to release the VMA pinning for 369 * the info->screen_base mmaping. Leaking the VMA is simpler than 370 * trying to rectify all the possible error paths leading here. 371 */ 372 373 drm_fb_helper_fini(&ifbdev->helper); 374 375 if (ifbdev->vma) 376 intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags); 377 378 if (ifbdev->fb) 379 drm_framebuffer_remove(&ifbdev->fb->base); 380 381 drm_fb_helper_unprepare(&ifbdev->helper); 382 kfree(ifbdev); 383} 384 385/* 386 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 387 * The core display code will have read out the current plane configuration, 388 * so we use that to figure out if there's an object for us to use as the 389 * fb, and if so, we re-use it for the fbdev configuration. 390 * 391 * Note we only support a single fb shared across pipes for boot (mostly for 392 * fbcon), so we just find the biggest and use that. 393 */ 394static bool intel_fbdev_init_bios(struct drm_device *dev, 395 struct intel_fbdev *ifbdev) 396{ 397 struct drm_i915_private *i915 = to_i915(dev); 398 struct intel_framebuffer *fb = NULL; 399 struct intel_crtc *crtc; 400 unsigned int max_size = 0; 401 402 /* Find the largest fb */ 403 for_each_intel_crtc(dev, crtc) { 404 struct intel_crtc_state *crtc_state = 405 to_intel_crtc_state(crtc->base.state); 406 struct intel_plane *plane = 407 to_intel_plane(crtc->base.primary); 408 struct intel_plane_state *plane_state = 409 to_intel_plane_state(plane->base.state); 410 struct drm_i915_gem_object *obj = 411 intel_fb_obj(plane_state->uapi.fb); 412 413 if (!crtc_state->uapi.active) { 414 drm_dbg_kms(&i915->drm, 415 "[CRTC:%d:%s] not active, skipping\n", 416 crtc->base.base.id, crtc->base.name); 417 continue; 418 } 419 420 if (!obj) { 421 drm_dbg_kms(&i915->drm, 422 "[PLANE:%d:%s] no fb, skipping\n", 423 plane->base.base.id, plane->base.name); 424 continue; 425 } 426 427 if (obj->base.size > max_size) { 428 drm_dbg_kms(&i915->drm, 429 "found possible fb from [PLANE:%d:%s]\n", 430 plane->base.base.id, plane->base.name); 431 fb = to_intel_framebuffer(plane_state->uapi.fb); 432 max_size = obj->base.size; 433 } 434 } 435 436 if (!fb) { 437 drm_dbg_kms(&i915->drm, 438 "no active fbs found, not using BIOS config\n"); 439 goto out; 440 } 441 442 /* Now make sure all the pipes will fit into it */ 443 for_each_intel_crtc(dev, crtc) { 444 struct intel_crtc_state *crtc_state = 445 to_intel_crtc_state(crtc->base.state); 446 struct intel_plane *plane = 447 to_intel_plane(crtc->base.primary); 448 unsigned int cur_size; 449 450 if (!crtc_state->uapi.active) { 451 drm_dbg_kms(&i915->drm, 452 "[CRTC:%d:%s] not active, skipping\n", 453 crtc->base.base.id, crtc->base.name); 454 continue; 455 } 456 457 drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n", 458 plane->base.base.id, plane->base.name); 459 460 /* 461 * See if the plane fb we found above will fit on this 462 * pipe. Note we need to use the selected fb's pitch and bpp 463 * rather than the current pipe's, since they differ. 464 */ 465 cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay; 466 cur_size = cur_size * fb->base.format->cpp[0]; 467 if (fb->base.pitches[0] < cur_size) { 468 drm_dbg_kms(&i915->drm, 469 "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n", 470 plane->base.base.id, plane->base.name, 471 cur_size, fb->base.pitches[0]); 472 fb = NULL; 473 break; 474 } 475 476 cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay; 477 cur_size = intel_fb_align_height(&fb->base, 0, cur_size); 478 cur_size *= fb->base.pitches[0]; 479 drm_dbg_kms(&i915->drm, 480 "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n", 481 crtc->base.base.id, crtc->base.name, 482 crtc_state->uapi.adjusted_mode.crtc_hdisplay, 483 crtc_state->uapi.adjusted_mode.crtc_vdisplay, 484 fb->base.format->cpp[0] * 8, 485 cur_size); 486 487 if (cur_size > max_size) { 488 drm_dbg_kms(&i915->drm, 489 "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n", 490 plane->base.base.id, plane->base.name, 491 cur_size, max_size); 492 fb = NULL; 493 break; 494 } 495 496 drm_dbg_kms(&i915->drm, 497 "fb big enough [PLANE:%d:%s] (%d >= %d)\n", 498 plane->base.base.id, plane->base.name, 499 max_size, cur_size); 500 } 501 502 if (!fb) { 503 drm_dbg_kms(&i915->drm, 504 "BIOS fb not suitable for all pipes, not using\n"); 505 goto out; 506 } 507 508 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; 509 ifbdev->fb = fb; 510 511 drm_framebuffer_get(&ifbdev->fb->base); 512 513 /* Final pass to check if any active pipes don't have fbs */ 514 for_each_intel_crtc(dev, crtc) { 515 struct intel_crtc_state *crtc_state = 516 to_intel_crtc_state(crtc->base.state); 517 struct intel_plane *plane = 518 to_intel_plane(crtc->base.primary); 519 struct intel_plane_state *plane_state = 520 to_intel_plane_state(plane->base.state); 521 522 if (!crtc_state->uapi.active) 523 continue; 524 525 drm_WARN(dev, !plane_state->uapi.fb, 526 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n", 527 plane->base.base.id, plane->base.name); 528 } 529 530 531 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n"); 532 return true; 533 534out: 535 536 return false; 537} 538 539static void intel_fbdev_suspend_worker(struct work_struct *work) 540{ 541 intel_fbdev_set_suspend(&container_of(work, 542 struct drm_i915_private, 543 display.fbdev.suspend_work)->drm, 544 FBINFO_STATE_RUNNING, 545 true); 546} 547 548int intel_fbdev_init(struct drm_device *dev) 549{ 550 struct drm_i915_private *dev_priv = to_i915(dev); 551 struct intel_fbdev *ifbdev; 552 int ret; 553 554 if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv))) 555 return -ENODEV; 556 557 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 558 if (ifbdev == NULL) 559 return -ENOMEM; 560 561 mutex_init(&ifbdev->hpd_lock); 562 drm_fb_helper_prepare(dev, &ifbdev->helper, 32, &intel_fb_helper_funcs); 563 564 if (intel_fbdev_init_bios(dev, ifbdev)) 565 ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp; 566 else 567 ifbdev->preferred_bpp = ifbdev->helper.preferred_bpp; 568 569 ret = drm_fb_helper_init(dev, &ifbdev->helper); 570 if (ret) { 571 kfree(ifbdev); 572 return ret; 573 } 574 575 dev_priv->display.fbdev.fbdev = ifbdev; 576 INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker); 577 578 return 0; 579} 580 581static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 582{ 583 struct intel_fbdev *ifbdev = data; 584 585 /* Due to peculiar init order wrt to hpd handling this is separate. */ 586 if (drm_fb_helper_initial_config(&ifbdev->helper)) 587 intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); 588} 589 590void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv) 591{ 592 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 593 594 if (!ifbdev) 595 return; 596 597 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 598} 599 600static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 601{ 602 if (!ifbdev->cookie) 603 return; 604 605 /* Only serialises with all preceding async calls, hence +1 */ 606 async_synchronize_cookie(ifbdev->cookie + 1); 607 ifbdev->cookie = 0; 608} 609 610void intel_fbdev_unregister(struct drm_i915_private *dev_priv) 611{ 612 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 613 614 if (!ifbdev) 615 return; 616 617 intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true); 618 619 if (!current_is_async()) 620 intel_fbdev_sync(ifbdev); 621 622 drm_fb_helper_unregister_info(&ifbdev->helper); 623} 624 625void intel_fbdev_fini(struct drm_i915_private *dev_priv) 626{ 627 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev); 628 629 if (!ifbdev) 630 return; 631 632 intel_fbdev_destroy(ifbdev); 633} 634 635/* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD 636 * processing, fbdev will perform a full connector reprobe if a hotplug event 637 * was received while HPD was suspended. 638 */ 639static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state) 640{ 641 struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev; 642 bool send_hpd = false; 643 644 mutex_lock(&ifbdev->hpd_lock); 645 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED; 646 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting; 647 ifbdev->hpd_waiting = false; 648 mutex_unlock(&ifbdev->hpd_lock); 649 650 if (send_hpd) { 651 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n"); 652 drm_fb_helper_hotplug_event(&ifbdev->helper); 653 } 654} 655 656void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 657{ 658 struct drm_i915_private *dev_priv = to_i915(dev); 659 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 660 struct fb_info *info; 661 662 if (!ifbdev) 663 return; 664 665 if (drm_WARN_ON(&dev_priv->drm, !HAS_DISPLAY(dev_priv))) 666 return; 667 668 if (!ifbdev->vma) 669 goto set_suspend; 670 671 info = ifbdev->helper.info; 672 673 if (synchronous) { 674 /* Flush any pending work to turn the console on, and then 675 * wait to turn it off. It must be synchronous as we are 676 * about to suspend or unload the driver. 677 * 678 * Note that from within the work-handler, we cannot flush 679 * ourselves, so only flush outstanding work upon suspend! 680 */ 681 if (state != FBINFO_STATE_RUNNING) 682 flush_work(&dev_priv->display.fbdev.suspend_work); 683 684 console_lock(); 685 } else { 686 /* 687 * The console lock can be pretty contented on resume due 688 * to all the printk activity. Try to keep it out of the hot 689 * path of resume if possible. 690 */ 691 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING); 692 if (!console_trylock()) { 693 /* Don't block our own workqueue as this can 694 * be run in parallel with other i915.ko tasks. 695 */ 696 queue_work(dev_priv->unordered_wq, 697 &dev_priv->display.fbdev.suspend_work); 698 return; 699 } 700 } 701 702 /* On resume from hibernation: If the object is shmemfs backed, it has 703 * been restored from swap. If the object is stolen however, it will be 704 * full of whatever garbage was left in there. 705 */ 706 if (state == FBINFO_STATE_RUNNING && 707 !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base))) 708 memset_io(info->screen_base, 0, info->screen_size); 709 710 drm_fb_helper_set_suspend(&ifbdev->helper, state); 711 console_unlock(); 712 713set_suspend: 714 intel_fbdev_hpd_set_suspend(dev_priv, state); 715} 716 717void intel_fbdev_output_poll_changed(struct drm_device *dev) 718{ 719 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 720 bool send_hpd; 721 722 if (!ifbdev) 723 return; 724 725 intel_fbdev_sync(ifbdev); 726 727 mutex_lock(&ifbdev->hpd_lock); 728 send_hpd = !ifbdev->hpd_suspended; 729 ifbdev->hpd_waiting = true; 730 mutex_unlock(&ifbdev->hpd_lock); 731 732 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup)) 733 drm_fb_helper_hotplug_event(&ifbdev->helper); 734} 735 736void intel_fbdev_restore_mode(struct drm_i915_private *dev_priv) 737{ 738 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 739 740 if (!ifbdev) 741 return; 742 743 intel_fbdev_sync(ifbdev); 744 if (!ifbdev->vma) 745 return; 746 747 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) 748 intel_fbdev_invalidate(ifbdev); 749} 750 751struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev) 752{ 753 if (!fbdev || !fbdev->helper.fb) 754 return NULL; 755 756 return to_intel_framebuffer(fbdev->helper.fb); 757} 758