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 <drm/drmP.h> 28 #include <linux/async.h> 29 #include <linux/module.h> 30 #include <linux/kernel.h> 31 #include <linux/errno.h> 32 #include <linux/string.h> 33 #include <linux/mm.h> 34 #include <linux/delay.h> 35 #include <linux/fb.h> 36 37 #include <drm/drmP.h> 38 #include <drm/drm_crtc.h> 39 #include <drm/drm_fb_helper.h> 40 #include "intel_drv.h" 41 #include <drm/i915_drm.h> 42 #include "i915_drv.h" 43 44 static int intel_fbdev_set_par(struct fb_info *info) 45 { 46 struct drm_fb_helper *fb_helper = info->par; 47 struct intel_fbdev *ifbdev = 48 container_of(fb_helper, struct intel_fbdev, helper); 49 int ret; 50 51 ret = drm_fb_helper_set_par(info); 52 53 if (ret == 0) { 54 mutex_lock(&fb_helper->dev->struct_mutex); 55 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 56 mutex_unlock(&fb_helper->dev->struct_mutex); 57 } 58 59 return ret; 60 } 61 62 static int intel_fbdev_blank(int blank, struct fb_info *info) 63 { 64 struct drm_fb_helper *fb_helper = info->par; 65 struct intel_fbdev *ifbdev = 66 container_of(fb_helper, struct intel_fbdev, helper); 67 int ret; 68 69 ret = drm_fb_helper_blank(blank, info); 70 71 if (ret == 0) { 72 mutex_lock(&fb_helper->dev->struct_mutex); 73 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 74 mutex_unlock(&fb_helper->dev->struct_mutex); 75 } 76 77 return ret; 78 } 79 80 #if 0 81 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 82 struct fb_info *info) 83 { 84 struct drm_fb_helper *fb_helper = info->par; 85 struct intel_fbdev *ifbdev = 86 container_of(fb_helper, struct intel_fbdev, helper); 87 88 int ret; 89 ret = drm_fb_helper_pan_display(var, info); 90 91 if (ret == 0) { 92 mutex_lock(&fb_helper->dev->struct_mutex); 93 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 94 mutex_unlock(&fb_helper->dev->struct_mutex); 95 } 96 97 return ret; 98 } 99 #endif 100 101 static struct fb_ops intelfb_ops = { 102 #if 0 103 .owner = THIS_MODULE, 104 .fb_check_var = drm_fb_helper_check_var, 105 #endif 106 .fb_set_par = intel_fbdev_set_par, 107 #if 0 108 .fb_fillrect = drm_fb_helper_cfb_fillrect, 109 .fb_copyarea = drm_fb_helper_cfb_copyarea, 110 .fb_imageblit = drm_fb_helper_cfb_imageblit, 111 .fb_pan_display = intel_fbdev_pan_display, 112 #endif 113 .fb_blank = intel_fbdev_blank, 114 #if 0 115 .fb_setcmap = drm_fb_helper_setcmap, 116 #endif 117 .fb_debug_enter = drm_fb_helper_debug_enter, 118 #if 0 119 .fb_debug_leave = drm_fb_helper_debug_leave, 120 #endif 121 }; 122 123 static int intelfb_alloc(struct drm_fb_helper *helper, 124 struct drm_fb_helper_surface_size *sizes) 125 { 126 struct intel_fbdev *ifbdev = 127 container_of(helper, struct intel_fbdev, helper); 128 struct drm_framebuffer *fb; 129 struct drm_device *dev = helper->dev; 130 struct drm_i915_private *dev_priv = to_i915(dev); 131 struct drm_mode_fb_cmd2 mode_cmd = {}; 132 struct drm_i915_gem_object *obj = NULL; 133 int size, ret; 134 135 /* we don't do packed 24bpp */ 136 if (sizes->surface_bpp == 24) 137 sizes->surface_bpp = 32; 138 139 mode_cmd.width = sizes->surface_width; 140 mode_cmd.height = sizes->surface_height; 141 142 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 143 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 144 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 145 sizes->surface_depth); 146 147 mutex_lock(&dev->struct_mutex); 148 149 size = mode_cmd.pitches[0] * mode_cmd.height; 150 size = PAGE_ALIGN(size); 151 152 /* If the FB is too big, just don't use it since fbdev is not very 153 * important and we should probably use that space with FBC or other 154 * features. */ 155 if (size * 2 < dev_priv->gtt.stolen_usable_size) 156 obj = i915_gem_object_create_stolen(dev, size); 157 if (obj == NULL) 158 obj = i915_gem_alloc_object(dev, size); 159 if (!obj) { 160 DRM_ERROR("failed to allocate framebuffer\n"); 161 ret = -ENOMEM; 162 goto out; 163 } 164 165 fb = __intel_framebuffer_create(dev, &mode_cmd, obj); 166 if (IS_ERR(fb)) { 167 drm_gem_object_unreference(&obj->base); 168 ret = PTR_ERR(fb); 169 goto out; 170 } 171 172 mutex_unlock(&dev->struct_mutex); 173 174 ifbdev->fb = to_intel_framebuffer(fb); 175 176 return 0; 177 178 out: 179 mutex_unlock(&dev->struct_mutex); 180 return ret; 181 } 182 183 static int intelfb_create(struct drm_fb_helper *helper, 184 struct drm_fb_helper_surface_size *sizes) 185 { 186 struct intel_fbdev *ifbdev = 187 container_of(helper, struct intel_fbdev, helper); 188 struct intel_framebuffer *intel_fb = ifbdev->fb; 189 struct drm_device *dev = helper->dev; 190 struct drm_i915_private *dev_priv = dev->dev_private; 191 struct fb_info *info; 192 struct drm_framebuffer *fb; 193 struct drm_i915_gem_object *obj; 194 device_t vga_dev; 195 int size, ret; 196 bool prealloc = false; 197 198 if (intel_fb && 199 (sizes->fb_width > intel_fb->base.width || 200 sizes->fb_height > intel_fb->base.height)) { 201 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 202 " releasing it\n", 203 intel_fb->base.width, intel_fb->base.height, 204 sizes->fb_width, sizes->fb_height); 205 drm_framebuffer_unreference(&intel_fb->base); 206 intel_fb = ifbdev->fb = NULL; 207 } 208 if (!intel_fb || WARN_ON(!intel_fb->obj)) { 209 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 210 ret = intelfb_alloc(helper, sizes); 211 if (ret) 212 return ret; 213 intel_fb = ifbdev->fb; 214 } else { 215 DRM_DEBUG_KMS("re-using BIOS fb\n"); 216 prealloc = true; 217 sizes->fb_width = intel_fb->base.width; 218 sizes->fb_height = intel_fb->base.height; 219 } 220 221 obj = intel_fb->obj; 222 size = obj->base.size; 223 224 mutex_lock(&dev->struct_mutex); 225 226 /* Pin the GGTT vma for our access via info->screen_base. 227 * This also validates that any existing fb inherited from the 228 * BIOS is suitable for own access. 229 */ 230 ret = intel_pin_and_fence_fb_obj(NULL, &ifbdev->fb->base, NULL); 231 if (ret) 232 goto out_unlock; 233 234 info = drm_fb_helper_alloc_fbi(helper); 235 if (IS_ERR(info)) { 236 DRM_ERROR("Failed to allocate fb_info\n"); 237 ret = PTR_ERR(info); 238 goto out_unpin; 239 } 240 241 info->par = helper; 242 243 fb = &ifbdev->fb->base; 244 245 ifbdev->helper.fb = fb; 246 247 #ifdef __DragonFly__ 248 vga_dev = device_get_parent(dev->dev->bsddev); 249 info->width = sizes->fb_width; 250 info->height = sizes->fb_height; 251 info->stride = fb->pitches[0]; 252 info->depth = sizes->surface_bpp; 253 info->paddr = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj); 254 info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev); 255 info->vaddr = (vm_offset_t)pmap_mapdev_attr(info->paddr, size, 256 VM_MEMATTR_WRITE_COMBINING); 257 info->fbops = intelfb_ops; 258 #else 259 strcpy(info->fix.id, "inteldrmfb"); 260 261 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 262 info->fbops = &intelfb_ops; 263 264 /* setup aperture base/size for vesafb takeover */ 265 info->apertures->ranges[0].base = dev->mode_config.fb_base; 266 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end; 267 268 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj); 269 info->fix.smem_len = size; 270 271 info->screen_base = 272 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj), 273 size); 274 if (!info->screen_base) { 275 DRM_ERROR("Failed to remap framebuffer into virtual memory\n"); 276 ret = -ENOSPC; 277 goto out_destroy_fbi; 278 } 279 info->screen_size = size; 280 281 /* This driver doesn't need a VT switch to restore the mode on resume */ 282 info->skip_vt_switch = true; 283 284 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 285 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 286 287 /* If the object is shmemfs backed, it will have given us zeroed pages. 288 * If the object is stolen however, it will be full of whatever 289 * garbage was left in there. 290 */ 291 if (ifbdev->fb->obj->stolen && !prealloc) 292 memset_io(info->screen_base, 0, info->screen_size); 293 294 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 295 #endif 296 297 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08llx, bo %p\n", 298 fb->width, fb->height, 299 i915_gem_obj_ggtt_offset(obj), obj); 300 301 mutex_unlock(&dev->struct_mutex); 302 #if 0 303 vga_switcheroo_client_fb_set(dev->pdev, info); 304 #endif 305 return 0; 306 307 #if 0 308 out_destroy_fbi: 309 drm_fb_helper_release_fbi(helper); 310 #endif 311 out_unpin: 312 i915_gem_object_ggtt_unpin(obj); 313 out_unlock: 314 mutex_unlock(&dev->struct_mutex); 315 return ret; 316 } 317 318 /** Sets the color ramps on behalf of RandR */ 319 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 320 u16 blue, int regno) 321 { 322 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 323 324 intel_crtc->lut_r[regno] = red >> 8; 325 intel_crtc->lut_g[regno] = green >> 8; 326 intel_crtc->lut_b[regno] = blue >> 8; 327 } 328 329 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 330 u16 *blue, int regno) 331 { 332 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 333 334 *red = intel_crtc->lut_r[regno] << 8; 335 *green = intel_crtc->lut_g[regno] << 8; 336 *blue = intel_crtc->lut_b[regno] << 8; 337 } 338 339 static struct drm_fb_helper_crtc * 340 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) 341 { 342 int i; 343 344 for (i = 0; i < fb_helper->crtc_count; i++) 345 if (fb_helper->crtc_info[i].mode_set.crtc == crtc) 346 return &fb_helper->crtc_info[i]; 347 348 return NULL; 349 } 350 351 /* 352 * Try to read the BIOS display configuration and use it for the initial 353 * fb configuration. 354 * 355 * The BIOS or boot loader will generally create an initial display 356 * configuration for us that includes some set of active pipes and displays. 357 * This routine tries to figure out which pipes and connectors are active 358 * and stuffs them into the crtcs and modes array given to us by the 359 * drm_fb_helper code. 360 * 361 * The overall sequence is: 362 * intel_fbdev_init - from driver load 363 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data 364 * drm_fb_helper_init - build fb helper structs 365 * drm_fb_helper_single_add_all_connectors - more fb helper structs 366 * intel_fbdev_initial_config - apply the config 367 * drm_fb_helper_initial_config - call ->probe then register_framebuffer() 368 * drm_setup_crtcs - build crtc config for fbdev 369 * intel_fb_initial_config - find active connectors etc 370 * drm_fb_helper_single_fb_probe - set up fbdev 371 * intelfb_create - re-use or alloc fb, build out fbdev structs 372 * 373 * Note that we don't make special consideration whether we could actually 374 * switch to the selected modes without a full modeset. E.g. when the display 375 * is in VGA mode we need to recalculate watermarks and set a new high-res 376 * framebuffer anyway. 377 */ 378 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, 379 struct drm_fb_helper_crtc **crtcs, 380 struct drm_display_mode **modes, 381 struct drm_fb_offset *offsets, 382 bool *enabled, int width, int height) 383 { 384 struct drm_device *dev = fb_helper->dev; 385 int i, j; 386 bool *save_enabled; 387 bool fallback = true; 388 int num_connectors_enabled = 0; 389 int num_connectors_detected = 0; 390 uint64_t conn_configured = 0, mask; 391 int pass = 0; 392 393 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), 394 GFP_KERNEL); 395 if (!save_enabled) 396 return false; 397 398 memcpy(save_enabled, enabled, dev->mode_config.num_connector); 399 mask = (1 << fb_helper->connector_count) - 1; 400 retry: 401 for (i = 0; i < fb_helper->connector_count; i++) { 402 struct drm_fb_helper_connector *fb_conn; 403 struct drm_connector *connector; 404 struct drm_encoder *encoder; 405 struct drm_fb_helper_crtc *new_crtc; 406 407 fb_conn = fb_helper->connector_info[i]; 408 connector = fb_conn->connector; 409 410 if (conn_configured & (1 << i)) 411 continue; 412 413 if (pass == 0 && !connector->has_tile) 414 continue; 415 416 if (connector->status == connector_status_connected) 417 num_connectors_detected++; 418 419 if (!enabled[i]) { 420 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 421 connector->name); 422 conn_configured |= (1 << i); 423 continue; 424 } 425 426 if (connector->force == DRM_FORCE_OFF) { 427 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 428 connector->name); 429 enabled[i] = false; 430 continue; 431 } 432 433 encoder = connector->state->best_encoder; 434 if (!encoder || WARN_ON(!connector->state->crtc)) { 435 if (connector->force > DRM_FORCE_OFF) 436 goto bail; 437 438 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 439 connector->name); 440 enabled[i] = false; 441 conn_configured |= (1 << i); 442 continue; 443 } 444 445 num_connectors_enabled++; 446 447 new_crtc = intel_fb_helper_crtc(fb_helper, connector->state->crtc); 448 449 /* 450 * Make sure we're not trying to drive multiple connectors 451 * with a single CRTC, since our cloning support may not 452 * match the BIOS. 453 */ 454 for (j = 0; j < fb_helper->connector_count; j++) { 455 if (crtcs[j] == new_crtc) { 456 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 457 goto bail; 458 } 459 } 460 461 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 462 connector->name); 463 464 /* go for command line mode first */ 465 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); 466 467 /* try for preferred next */ 468 if (!modes[i]) { 469 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", 470 connector->name, connector->has_tile); 471 modes[i] = drm_has_preferred_mode(fb_conn, width, 472 height); 473 } 474 475 /* No preferred mode marked by the EDID? Are there any modes? */ 476 if (!modes[i] && !list_empty(&connector->modes)) { 477 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 478 connector->name); 479 modes[i] = list_first_entry(&connector->modes, 480 struct drm_display_mode, 481 head); 482 } 483 484 /* last resort: use current mode */ 485 if (!modes[i]) { 486 /* 487 * IMPORTANT: We want to use the adjusted mode (i.e. 488 * after the panel fitter upscaling) as the initial 489 * config, not the input mode, which is what crtc->mode 490 * usually contains. But since our current 491 * code puts a mode derived from the post-pfit timings 492 * into crtc->mode this works out correctly. 493 * 494 * This is crtc->mode and not crtc->state->mode for the 495 * fastboot check to work correctly. crtc_state->mode has 496 * I915_MODE_FLAG_INHERITED, which we clear to force check 497 * state. 498 */ 499 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 500 connector->name); 501 modes[i] = &connector->state->crtc->mode; 502 } 503 crtcs[i] = new_crtc; 504 505 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n", 506 connector->name, 507 pipe_name(to_intel_crtc(connector->state->crtc)->pipe), 508 connector->state->crtc->base.id, 509 modes[i]->hdisplay, modes[i]->vdisplay, 510 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 511 512 fallback = false; 513 conn_configured |= (1 << i); 514 } 515 516 if ((conn_configured & mask) != mask) { 517 pass++; 518 goto retry; 519 } 520 521 /* 522 * If the BIOS didn't enable everything it could, fall back to have the 523 * same user experiencing of lighting up as much as possible like the 524 * fbdev helper library. 525 */ 526 if (num_connectors_enabled != num_connectors_detected && 527 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { 528 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 529 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 530 num_connectors_detected); 531 fallback = true; 532 } 533 534 if (fallback) { 535 bail: 536 DRM_DEBUG_KMS("Not using firmware configuration\n"); 537 memcpy(enabled, save_enabled, dev->mode_config.num_connector); 538 kfree(save_enabled); 539 return false; 540 } 541 542 kfree(save_enabled); 543 return true; 544 } 545 546 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 547 .initial_config = intel_fb_initial_config, 548 .gamma_set = intel_crtc_fb_gamma_set, 549 .gamma_get = intel_crtc_fb_gamma_get, 550 .fb_probe = intelfb_create, 551 }; 552 553 static void intel_fbdev_destroy(struct drm_device *dev, 554 struct intel_fbdev *ifbdev) 555 { 556 /* We rely on the object-free to release the VMA pinning for 557 * the info->screen_base mmaping. Leaking the VMA is simpler than 558 * trying to rectify all the possible error paths leading here. 559 */ 560 561 drm_fb_helper_unregister_fbi(&ifbdev->helper); 562 drm_fb_helper_release_fbi(&ifbdev->helper); 563 564 drm_fb_helper_fini(&ifbdev->helper); 565 566 if (ifbdev->fb) { 567 drm_framebuffer_unregister_private(&ifbdev->fb->base); 568 drm_framebuffer_remove(&ifbdev->fb->base); 569 } 570 } 571 572 /* 573 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 574 * The core display code will have read out the current plane configuration, 575 * so we use that to figure out if there's an object for us to use as the 576 * fb, and if so, we re-use it for the fbdev configuration. 577 * 578 * Note we only support a single fb shared across pipes for boot (mostly for 579 * fbcon), so we just find the biggest and use that. 580 */ 581 static bool intel_fbdev_init_bios(struct drm_device *dev, 582 struct intel_fbdev *ifbdev) 583 { 584 struct intel_framebuffer *fb = NULL; 585 struct drm_crtc *crtc; 586 struct intel_crtc *intel_crtc; 587 unsigned int max_size = 0; 588 589 /* Find the largest fb */ 590 for_each_crtc(dev, crtc) { 591 struct drm_i915_gem_object *obj = 592 intel_fb_obj(crtc->primary->state->fb); 593 intel_crtc = to_intel_crtc(crtc); 594 595 if (!crtc->state->active || !obj) { 596 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 597 pipe_name(intel_crtc->pipe)); 598 continue; 599 } 600 601 if (obj->base.size > max_size) { 602 DRM_DEBUG_KMS("found possible fb from plane %c\n", 603 pipe_name(intel_crtc->pipe)); 604 fb = to_intel_framebuffer(crtc->primary->state->fb); 605 max_size = obj->base.size; 606 } 607 } 608 609 if (!fb) { 610 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 611 goto out; 612 } 613 614 /* Now make sure all the pipes will fit into it */ 615 for_each_crtc(dev, crtc) { 616 unsigned int cur_size; 617 618 intel_crtc = to_intel_crtc(crtc); 619 620 if (!crtc->state->active) { 621 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 622 pipe_name(intel_crtc->pipe)); 623 continue; 624 } 625 626 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 627 pipe_name(intel_crtc->pipe)); 628 629 /* 630 * See if the plane fb we found above will fit on this 631 * pipe. Note we need to use the selected fb's pitch and bpp 632 * rather than the current pipe's, since they differ. 633 */ 634 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay; 635 cur_size = cur_size * fb->base.bits_per_pixel / 8; 636 if (fb->base.pitches[0] < cur_size) { 637 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 638 pipe_name(intel_crtc->pipe), 639 cur_size, fb->base.pitches[0]); 640 fb = NULL; 641 break; 642 } 643 644 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay; 645 cur_size = intel_fb_align_height(dev, cur_size, 646 fb->base.pixel_format, 647 fb->base.modifier[0]); 648 cur_size *= fb->base.pitches[0]; 649 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 650 pipe_name(intel_crtc->pipe), 651 intel_crtc->config->base.adjusted_mode.crtc_hdisplay, 652 intel_crtc->config->base.adjusted_mode.crtc_vdisplay, 653 fb->base.bits_per_pixel, 654 cur_size); 655 656 if (cur_size > max_size) { 657 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 658 pipe_name(intel_crtc->pipe), 659 cur_size, max_size); 660 fb = NULL; 661 break; 662 } 663 664 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 665 pipe_name(intel_crtc->pipe), 666 max_size, cur_size); 667 } 668 669 if (!fb) { 670 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 671 goto out; 672 } 673 674 ifbdev->preferred_bpp = fb->base.bits_per_pixel; 675 ifbdev->fb = fb; 676 677 drm_framebuffer_reference(&ifbdev->fb->base); 678 679 /* Final pass to check if any active pipes don't have fbs */ 680 for_each_crtc(dev, crtc) { 681 intel_crtc = to_intel_crtc(crtc); 682 683 if (!crtc->state->active) 684 continue; 685 686 WARN(!crtc->primary->fb, 687 "re-used BIOS config but lost an fb on crtc %d\n", 688 crtc->base.id); 689 } 690 691 692 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 693 return true; 694 695 out: 696 697 return false; 698 } 699 700 static void intel_fbdev_suspend_worker(struct work_struct *work) 701 { 702 intel_fbdev_set_suspend(container_of(work, 703 struct drm_i915_private, 704 fbdev_suspend_work)->dev, 705 FBINFO_STATE_RUNNING, 706 true); 707 } 708 709 int intel_fbdev_init(struct drm_device *dev) 710 { 711 struct intel_fbdev *ifbdev; 712 struct drm_i915_private *dev_priv = dev->dev_private; 713 int ret; 714 715 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) 716 return -ENODEV; 717 718 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 719 if (ifbdev == NULL) 720 return -ENOMEM; 721 722 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 723 724 if (!intel_fbdev_init_bios(dev, ifbdev)) 725 ifbdev->preferred_bpp = 32; 726 727 ret = drm_fb_helper_init(dev, &ifbdev->helper, 728 INTEL_INFO(dev)->num_pipes, 4); 729 if (ret) { 730 kfree(ifbdev); 731 return ret; 732 } 733 734 ifbdev->helper.atomic = true; 735 736 dev_priv->fbdev = ifbdev; 737 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 738 739 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 740 741 return 0; 742 } 743 744 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 745 { 746 struct drm_i915_private *dev_priv = data; 747 struct intel_fbdev *ifbdev = dev_priv->fbdev; 748 749 /* Due to peculiar init order wrt to hpd handling this is separate. */ 750 if (drm_fb_helper_initial_config(&ifbdev->helper, 751 ifbdev->preferred_bpp)) 752 intel_fbdev_fini(dev_priv->dev); 753 } 754 755 void intel_fbdev_initial_config_async(struct drm_device *dev) 756 { 757 async_schedule(intel_fbdev_initial_config, to_i915(dev)); 758 } 759 760 void intel_fbdev_fini(struct drm_device *dev) 761 { 762 struct drm_i915_private *dev_priv = dev->dev_private; 763 if (!dev_priv->fbdev) 764 return; 765 766 #if 0 767 flush_work(&dev_priv->fbdev_suspend_work); 768 769 if (!current_is_async()) 770 #endif 771 async_synchronize_full(); 772 intel_fbdev_destroy(dev, dev_priv->fbdev); 773 kfree(dev_priv->fbdev); 774 dev_priv->fbdev = NULL; 775 } 776 777 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 778 { 779 #if 0 780 struct drm_i915_private *dev_priv = dev->dev_private; 781 struct intel_fbdev *ifbdev = dev_priv->fbdev; 782 struct fb_info *info; 783 784 if (!ifbdev) 785 return; 786 787 info = ifbdev->helper.fbdev; 788 789 if (synchronous) { 790 /* Flush any pending work to turn the console on, and then 791 * wait to turn it off. It must be synchronous as we are 792 * about to suspend or unload the driver. 793 * 794 * Note that from within the work-handler, we cannot flush 795 * ourselves, so only flush outstanding work upon suspend! 796 */ 797 if (state != FBINFO_STATE_RUNNING) 798 flush_work(&dev_priv->fbdev_suspend_work); 799 console_lock(); 800 } else { 801 /* 802 * The console lock can be pretty contented on resume due 803 * to all the printk activity. Try to keep it out of the hot 804 * path of resume if possible. 805 */ 806 WARN_ON(state != FBINFO_STATE_RUNNING); 807 if (!console_trylock()) { 808 /* Don't block our own workqueue as this can 809 * be run in parallel with other i915.ko tasks. 810 */ 811 schedule_work(&dev_priv->fbdev_suspend_work); 812 return; 813 } 814 } 815 816 /* On resume from hibernation: If the object is shmemfs backed, it has 817 * been restored from swap. If the object is stolen however, it will be 818 * full of whatever garbage was left in there. 819 */ 820 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) 821 memset_io(info->screen_base, 0, info->screen_size); 822 823 drm_fb_helper_set_suspend(&ifbdev->helper, state); 824 console_unlock(); 825 #endif 826 } 827 828 void intel_fbdev_output_poll_changed(struct drm_device *dev) 829 { 830 struct drm_i915_private *dev_priv = dev->dev_private; 831 if (dev_priv->fbdev) 832 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper); 833 } 834 835 void intel_fbdev_restore_mode(struct drm_device *dev) 836 { 837 int ret; 838 struct drm_i915_private *dev_priv = dev->dev_private; 839 struct intel_fbdev *ifbdev = dev_priv->fbdev; 840 struct drm_fb_helper *fb_helper; 841 842 if (!ifbdev) 843 return; 844 845 fb_helper = &ifbdev->helper; 846 847 /* XXX: avoid dead-locking the Xorg on exit */ 848 if (mutex_is_locked(&dev->mode_config.mutex)) { 849 DRM_ERROR("fubar while trying to restore kms_console\n"); 850 return; /* drm_modeset_unlock_all(dev) ? */ 851 } 852 853 ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); 854 if (ret) { 855 DRM_DEBUG("failed to restore crtc mode\n"); 856 } else { 857 mutex_lock(&fb_helper->dev->struct_mutex); 858 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 859 mutex_unlock(&fb_helper->dev->struct_mutex); 860 } 861 } 862