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