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/console.h> 32 #include <linux/errno.h> 33 #include <linux/string.h> 34 #include <linux/mm.h> 35 #include <linux/delay.h> 36 #include <linux/fb.h> 37 #include <linux/vga_switcheroo.h> 38 39 #include <drm/drmP.h> 40 #include <drm/drm_crtc.h> 41 #include <drm/drm_fb_helper.h> 42 #include "intel_drv.h" 43 #include <drm/i915_drm.h> 44 #include "i915_drv.h" 45 46 static int intel_fbdev_set_par(struct fb_info *info) 47 { 48 struct drm_fb_helper *fb_helper = info->par; 49 struct intel_fbdev *ifbdev = 50 container_of(fb_helper, struct intel_fbdev, helper); 51 int ret; 52 53 ret = drm_fb_helper_set_par(info); 54 55 if (ret == 0) { 56 mutex_lock(&fb_helper->dev->struct_mutex); 57 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 58 mutex_unlock(&fb_helper->dev->struct_mutex); 59 } 60 61 return ret; 62 } 63 64 static int intel_fbdev_blank(int blank, struct fb_info *info) 65 { 66 struct drm_fb_helper *fb_helper = info->par; 67 struct intel_fbdev *ifbdev = 68 container_of(fb_helper, struct intel_fbdev, helper); 69 int ret; 70 71 ret = drm_fb_helper_blank(blank, info); 72 73 if (ret == 0) { 74 mutex_lock(&fb_helper->dev->struct_mutex); 75 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 76 mutex_unlock(&fb_helper->dev->struct_mutex); 77 } 78 79 return ret; 80 } 81 82 #if 0 83 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 84 struct fb_info *info) 85 { 86 struct drm_fb_helper *fb_helper = info->par; 87 struct intel_fbdev *ifbdev = 88 container_of(fb_helper, struct intel_fbdev, helper); 89 90 int ret; 91 ret = drm_fb_helper_pan_display(var, info); 92 93 if (ret == 0) { 94 mutex_lock(&fb_helper->dev->struct_mutex); 95 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 96 mutex_unlock(&fb_helper->dev->struct_mutex); 97 } 98 99 return ret; 100 } 101 #endif 102 103 static struct fb_ops intelfb_ops = { 104 #if 0 105 .owner = THIS_MODULE, 106 .fb_check_var = drm_fb_helper_check_var, 107 #endif 108 .fb_set_par = intel_fbdev_set_par, 109 #if 0 110 .fb_fillrect = drm_fb_helper_cfb_fillrect, 111 .fb_copyarea = drm_fb_helper_cfb_copyarea, 112 .fb_imageblit = drm_fb_helper_cfb_imageblit, 113 .fb_pan_display = intel_fbdev_pan_display, 114 #endif 115 .fb_blank = intel_fbdev_blank, 116 #if 0 117 .fb_setcmap = drm_fb_helper_setcmap, 118 #endif 119 .fb_debug_enter = drm_fb_helper_debug_enter, 120 #if 0 121 .fb_debug_leave = drm_fb_helper_debug_leave, 122 #endif 123 }; 124 125 static int intelfb_alloc(struct drm_fb_helper *helper, 126 struct drm_fb_helper_surface_size *sizes) 127 { 128 struct intel_fbdev *ifbdev = 129 container_of(helper, struct intel_fbdev, helper); 130 struct drm_framebuffer *fb; 131 struct drm_device *dev = helper->dev; 132 struct drm_i915_private *dev_priv = to_i915(dev); 133 struct i915_ggtt *ggtt = &dev_priv->ggtt; 134 struct drm_mode_fb_cmd2 mode_cmd = {}; 135 struct drm_i915_gem_object *obj = NULL; 136 int size, ret; 137 138 /* we don't do packed 24bpp */ 139 if (sizes->surface_bpp == 24) 140 sizes->surface_bpp = 32; 141 142 mode_cmd.width = sizes->surface_width; 143 mode_cmd.height = sizes->surface_height; 144 145 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 146 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 147 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 148 sizes->surface_depth); 149 150 mutex_lock(&dev->struct_mutex); 151 152 size = mode_cmd.pitches[0] * mode_cmd.height; 153 size = PAGE_ALIGN(size); 154 155 /* If the FB is too big, just don't use it since fbdev is not very 156 * important and we should probably use that space with FBC or other 157 * features. */ 158 if (size * 2 < ggtt->stolen_usable_size) 159 obj = i915_gem_object_create_stolen(dev, size); 160 if (obj == NULL) 161 obj = i915_gem_alloc_object(dev, size); 162 if (!obj) { 163 DRM_ERROR("failed to allocate framebuffer\n"); 164 ret = -ENOMEM; 165 goto out; 166 } 167 168 fb = __intel_framebuffer_create(dev, &mode_cmd, obj); 169 if (IS_ERR(fb)) { 170 drm_gem_object_unreference(&obj->base); 171 ret = PTR_ERR(fb); 172 goto out; 173 } 174 175 mutex_unlock(&dev->struct_mutex); 176 177 ifbdev->fb = to_intel_framebuffer(fb); 178 179 return 0; 180 181 out: 182 mutex_unlock(&dev->struct_mutex); 183 return ret; 184 } 185 186 static int intelfb_create(struct drm_fb_helper *helper, 187 struct drm_fb_helper_surface_size *sizes) 188 { 189 struct intel_fbdev *ifbdev = 190 container_of(helper, struct intel_fbdev, helper); 191 struct intel_framebuffer *intel_fb = ifbdev->fb; 192 struct drm_device *dev = helper->dev; 193 struct drm_i915_private *dev_priv = to_i915(dev); 194 struct fb_info *info; 195 struct drm_framebuffer *fb; 196 struct drm_i915_gem_object *obj; 197 device_t vga_dev; 198 int size, ret; 199 bool prealloc = false; 200 201 if (intel_fb && 202 (sizes->fb_width > intel_fb->base.width || 203 sizes->fb_height > intel_fb->base.height)) { 204 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 205 " releasing it\n", 206 intel_fb->base.width, intel_fb->base.height, 207 sizes->fb_width, sizes->fb_height); 208 drm_framebuffer_unreference(&intel_fb->base); 209 intel_fb = ifbdev->fb = NULL; 210 } 211 if (!intel_fb || WARN_ON(!intel_fb->obj)) { 212 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 213 ret = intelfb_alloc(helper, sizes); 214 if (ret) 215 return ret; 216 intel_fb = ifbdev->fb; 217 } else { 218 DRM_DEBUG_KMS("re-using BIOS fb\n"); 219 prealloc = true; 220 sizes->fb_width = intel_fb->base.width; 221 sizes->fb_height = intel_fb->base.height; 222 } 223 224 obj = intel_fb->obj; 225 size = obj->base.size; 226 227 mutex_lock(&dev->struct_mutex); 228 229 /* Pin the GGTT vma for our access via info->screen_base. 230 * This also validates that any existing fb inherited from the 231 * BIOS is suitable for own access. 232 */ 233 ret = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0)); 234 if (ret) 235 goto out_unlock; 236 237 info = drm_fb_helper_alloc_fbi(helper); 238 if (IS_ERR(info)) { 239 DRM_ERROR("Failed to allocate fb_info\n"); 240 ret = PTR_ERR(info); 241 goto out_unpin; 242 } 243 244 info->par = helper; 245 246 fb = &ifbdev->fb->base; 247 248 ifbdev->helper.fb = fb; 249 250 #ifdef __DragonFly__ 251 vga_dev = device_get_parent(dev->dev->bsddev); 252 info->width = sizes->fb_width; 253 info->height = sizes->fb_height; 254 info->stride = fb->pitches[0]; 255 info->depth = sizes->surface_bpp; 256 info->paddr = dev_priv->ggtt.mappable_base + i915_gem_obj_ggtt_offset(obj); 257 info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev); 258 info->vaddr = (vm_offset_t)pmap_mapdev_attr(info->paddr, size, 259 VM_MEMATTR_WRITE_COMBINING); 260 info->fbops = intelfb_ops; 261 #else 262 strcpy(info->fix.id, "inteldrmfb"); 263 264 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 265 info->fbops = &intelfb_ops; 266 267 /* setup aperture base/size for vesafb takeover */ 268 info->apertures->ranges[0].base = dev->mode_config.fb_base; 269 info->apertures->ranges[0].size = ggtt->mappable_end; 270 271 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj); 272 info->fix.smem_len = size; 273 274 info->screen_base = 275 ioremap_wc(ggtt->mappable_base + i915_gem_obj_ggtt_offset(obj), 276 size); 277 if (!info->screen_base) { 278 DRM_ERROR("Failed to remap framebuffer into virtual memory\n"); 279 ret = -ENOSPC; 280 goto out_destroy_fbi; 281 } 282 info->screen_size = size; 283 284 /* This driver doesn't need a VT switch to restore the mode on resume */ 285 info->skip_vt_switch = true; 286 287 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 288 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 289 290 /* If the object is shmemfs backed, it will have given us zeroed pages. 291 * If the object is stolen however, it will be full of whatever 292 * garbage was left in there. 293 */ 294 if (ifbdev->fb->obj->stolen && !prealloc) 295 memset_io(info->screen_base, 0, info->screen_size); 296 297 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 298 #endif 299 300 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08llx, bo %p\n", 301 fb->width, fb->height, 302 i915_gem_obj_ggtt_offset(obj), obj); 303 304 mutex_unlock(&dev->struct_mutex); 305 #if 0 306 vga_switcheroo_client_fb_set(dev->pdev, info); 307 #endif 308 return 0; 309 310 #if 0 311 out_destroy_fbi: 312 drm_fb_helper_release_fbi(helper); 313 #endif 314 out_unpin: 315 i915_gem_object_ggtt_unpin(obj); 316 out_unlock: 317 mutex_unlock(&dev->struct_mutex); 318 return ret; 319 } 320 321 /** Sets the color ramps on behalf of RandR */ 322 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 323 u16 blue, int regno) 324 { 325 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 326 327 intel_crtc->lut_r[regno] = red >> 8; 328 intel_crtc->lut_g[regno] = green >> 8; 329 intel_crtc->lut_b[regno] = blue >> 8; 330 } 331 332 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 333 u16 *blue, int regno) 334 { 335 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 336 337 *red = intel_crtc->lut_r[regno] << 8; 338 *green = intel_crtc->lut_g[regno] << 8; 339 *blue = intel_crtc->lut_b[regno] << 8; 340 } 341 342 static struct drm_fb_helper_crtc * 343 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) 344 { 345 int i; 346 347 for (i = 0; i < fb_helper->crtc_count; i++) 348 if (fb_helper->crtc_info[i].mode_set.crtc == crtc) 349 return &fb_helper->crtc_info[i]; 350 351 return NULL; 352 } 353 354 /* 355 * Try to read the BIOS display configuration and use it for the initial 356 * fb configuration. 357 * 358 * The BIOS or boot loader will generally create an initial display 359 * configuration for us that includes some set of active pipes and displays. 360 * This routine tries to figure out which pipes and connectors are active 361 * and stuffs them into the crtcs and modes array given to us by the 362 * drm_fb_helper code. 363 * 364 * The overall sequence is: 365 * intel_fbdev_init - from driver load 366 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data 367 * drm_fb_helper_init - build fb helper structs 368 * drm_fb_helper_single_add_all_connectors - more fb helper structs 369 * intel_fbdev_initial_config - apply the config 370 * drm_fb_helper_initial_config - call ->probe then register_framebuffer() 371 * drm_setup_crtcs - build crtc config for fbdev 372 * intel_fb_initial_config - find active connectors etc 373 * drm_fb_helper_single_fb_probe - set up fbdev 374 * intelfb_create - re-use or alloc fb, build out fbdev structs 375 * 376 * Note that we don't make special consideration whether we could actually 377 * switch to the selected modes without a full modeset. E.g. when the display 378 * is in VGA mode we need to recalculate watermarks and set a new high-res 379 * framebuffer anyway. 380 */ 381 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, 382 struct drm_fb_helper_crtc **crtcs, 383 struct drm_display_mode **modes, 384 struct drm_fb_offset *offsets, 385 bool *enabled, int width, int height) 386 { 387 struct drm_device *dev = fb_helper->dev; 388 int i, j; 389 bool *save_enabled; 390 bool fallback = true; 391 int num_connectors_enabled = 0; 392 int num_connectors_detected = 0; 393 uint64_t conn_configured = 0, mask; 394 int pass = 0; 395 396 save_enabled = kcalloc(fb_helper->connector_count, sizeof(bool), 397 GFP_KERNEL); 398 if (!save_enabled) 399 return false; 400 401 memcpy(save_enabled, enabled, fb_helper->connector_count); 402 mask = (1 << fb_helper->connector_count) - 1; 403 retry: 404 for (i = 0; i < fb_helper->connector_count; i++) { 405 struct drm_fb_helper_connector *fb_conn; 406 struct drm_connector *connector; 407 struct drm_encoder *encoder; 408 struct drm_fb_helper_crtc *new_crtc; 409 struct intel_crtc *intel_crtc; 410 411 fb_conn = fb_helper->connector_info[i]; 412 connector = fb_conn->connector; 413 414 if (conn_configured & (1 << i)) 415 continue; 416 417 if (pass == 0 && !connector->has_tile) 418 continue; 419 420 if (connector->status == connector_status_connected) 421 num_connectors_detected++; 422 423 if (!enabled[i]) { 424 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 425 connector->name); 426 conn_configured |= (1 << i); 427 continue; 428 } 429 430 if (connector->force == DRM_FORCE_OFF) { 431 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 432 connector->name); 433 enabled[i] = false; 434 continue; 435 } 436 437 encoder = connector->state->best_encoder; 438 if (!encoder || WARN_ON(!connector->state->crtc)) { 439 if (connector->force > DRM_FORCE_OFF) 440 goto bail; 441 442 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 443 connector->name); 444 enabled[i] = false; 445 conn_configured |= (1 << i); 446 continue; 447 } 448 449 num_connectors_enabled++; 450 451 intel_crtc = to_intel_crtc(connector->state->crtc); 452 for (j = 0; j < 256; j++) { 453 intel_crtc->lut_r[j] = j; 454 intel_crtc->lut_g[j] = j; 455 intel_crtc->lut_b[j] = j; 456 } 457 458 new_crtc = intel_fb_helper_crtc(fb_helper, connector->state->crtc); 459 460 /* 461 * Make sure we're not trying to drive multiple connectors 462 * with a single CRTC, since our cloning support may not 463 * match the BIOS. 464 */ 465 for (j = 0; j < fb_helper->connector_count; j++) { 466 if (crtcs[j] == new_crtc) { 467 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 468 goto bail; 469 } 470 } 471 472 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 473 connector->name); 474 475 /* go for command line mode first */ 476 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); 477 478 /* try for preferred next */ 479 if (!modes[i]) { 480 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", 481 connector->name, connector->has_tile); 482 modes[i] = drm_has_preferred_mode(fb_conn, width, 483 height); 484 } 485 486 /* No preferred mode marked by the EDID? Are there any modes? */ 487 if (!modes[i] && !list_empty(&connector->modes)) { 488 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 489 connector->name); 490 modes[i] = list_first_entry(&connector->modes, 491 struct drm_display_mode, 492 head); 493 } 494 495 /* last resort: use current mode */ 496 if (!modes[i]) { 497 /* 498 * IMPORTANT: We want to use the adjusted mode (i.e. 499 * after the panel fitter upscaling) as the initial 500 * config, not the input mode, which is what crtc->mode 501 * usually contains. But since our current 502 * code puts a mode derived from the post-pfit timings 503 * into crtc->mode this works out correctly. 504 * 505 * This is crtc->mode and not crtc->state->mode for the 506 * fastboot check to work correctly. crtc_state->mode has 507 * I915_MODE_FLAG_INHERITED, which we clear to force check 508 * state. 509 */ 510 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 511 connector->name); 512 modes[i] = &connector->state->crtc->mode; 513 } 514 crtcs[i] = new_crtc; 515 516 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n", 517 connector->name, 518 pipe_name(to_intel_crtc(connector->state->crtc)->pipe), 519 connector->state->crtc->base.id, 520 modes[i]->hdisplay, modes[i]->vdisplay, 521 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 522 523 fallback = false; 524 conn_configured |= (1 << i); 525 } 526 527 if ((conn_configured & mask) != mask) { 528 pass++; 529 goto retry; 530 } 531 532 /* 533 * If the BIOS didn't enable everything it could, fall back to have the 534 * same user experiencing of lighting up as much as possible like the 535 * fbdev helper library. 536 */ 537 if (num_connectors_enabled != num_connectors_detected && 538 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { 539 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 540 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 541 num_connectors_detected); 542 fallback = true; 543 } 544 545 if (fallback) { 546 bail: 547 DRM_DEBUG_KMS("Not using firmware configuration\n"); 548 memcpy(enabled, save_enabled, fb_helper->connector_count); 549 kfree(save_enabled); 550 return false; 551 } 552 553 kfree(save_enabled); 554 return true; 555 } 556 557 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 558 .initial_config = intel_fb_initial_config, 559 .gamma_set = intel_crtc_fb_gamma_set, 560 .gamma_get = intel_crtc_fb_gamma_get, 561 .fb_probe = intelfb_create, 562 }; 563 564 static void intel_fbdev_destroy(struct drm_device *dev, 565 struct intel_fbdev *ifbdev) 566 { 567 /* We rely on the object-free to release the VMA pinning for 568 * the info->screen_base mmaping. Leaking the VMA is simpler than 569 * trying to rectify all the possible error paths leading here. 570 */ 571 572 drm_fb_helper_unregister_fbi(&ifbdev->helper); 573 drm_fb_helper_release_fbi(&ifbdev->helper); 574 575 drm_fb_helper_fini(&ifbdev->helper); 576 577 if (ifbdev->fb) { 578 drm_framebuffer_unregister_private(&ifbdev->fb->base); 579 drm_framebuffer_remove(&ifbdev->fb->base); 580 } 581 } 582 583 /* 584 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 585 * The core display code will have read out the current plane configuration, 586 * so we use that to figure out if there's an object for us to use as the 587 * fb, and if so, we re-use it for the fbdev configuration. 588 * 589 * Note we only support a single fb shared across pipes for boot (mostly for 590 * fbcon), so we just find the biggest and use that. 591 */ 592 static bool intel_fbdev_init_bios(struct drm_device *dev, 593 struct intel_fbdev *ifbdev) 594 { 595 struct intel_framebuffer *fb = NULL; 596 struct drm_crtc *crtc; 597 struct intel_crtc *intel_crtc; 598 unsigned int max_size = 0; 599 600 /* Find the largest fb */ 601 for_each_crtc(dev, crtc) { 602 struct drm_i915_gem_object *obj = 603 intel_fb_obj(crtc->primary->state->fb); 604 intel_crtc = to_intel_crtc(crtc); 605 606 if (!crtc->state->active || !obj) { 607 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 608 pipe_name(intel_crtc->pipe)); 609 continue; 610 } 611 612 if (obj->base.size > max_size) { 613 DRM_DEBUG_KMS("found possible fb from plane %c\n", 614 pipe_name(intel_crtc->pipe)); 615 fb = to_intel_framebuffer(crtc->primary->state->fb); 616 max_size = obj->base.size; 617 } 618 } 619 620 if (!fb) { 621 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 622 goto out; 623 } 624 625 /* Now make sure all the pipes will fit into it */ 626 for_each_crtc(dev, crtc) { 627 unsigned int cur_size; 628 629 intel_crtc = to_intel_crtc(crtc); 630 631 if (!crtc->state->active) { 632 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 633 pipe_name(intel_crtc->pipe)); 634 continue; 635 } 636 637 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 638 pipe_name(intel_crtc->pipe)); 639 640 /* 641 * See if the plane fb we found above will fit on this 642 * pipe. Note we need to use the selected fb's pitch and bpp 643 * rather than the current pipe's, since they differ. 644 */ 645 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay; 646 cur_size = cur_size * fb->base.bits_per_pixel / 8; 647 if (fb->base.pitches[0] < cur_size) { 648 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 649 pipe_name(intel_crtc->pipe), 650 cur_size, fb->base.pitches[0]); 651 fb = NULL; 652 break; 653 } 654 655 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay; 656 cur_size = intel_fb_align_height(dev, cur_size, 657 fb->base.pixel_format, 658 fb->base.modifier[0]); 659 cur_size *= fb->base.pitches[0]; 660 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 661 pipe_name(intel_crtc->pipe), 662 intel_crtc->config->base.adjusted_mode.crtc_hdisplay, 663 intel_crtc->config->base.adjusted_mode.crtc_vdisplay, 664 fb->base.bits_per_pixel, 665 cur_size); 666 667 if (cur_size > max_size) { 668 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 669 pipe_name(intel_crtc->pipe), 670 cur_size, max_size); 671 fb = NULL; 672 break; 673 } 674 675 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 676 pipe_name(intel_crtc->pipe), 677 max_size, cur_size); 678 } 679 680 if (!fb) { 681 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 682 goto out; 683 } 684 685 ifbdev->preferred_bpp = fb->base.bits_per_pixel; 686 ifbdev->fb = fb; 687 688 drm_framebuffer_reference(&ifbdev->fb->base); 689 690 /* Final pass to check if any active pipes don't have fbs */ 691 for_each_crtc(dev, crtc) { 692 intel_crtc = to_intel_crtc(crtc); 693 694 if (!crtc->state->active) 695 continue; 696 697 WARN(!crtc->primary->fb, 698 "re-used BIOS config but lost an fb on crtc %d\n", 699 crtc->base.id); 700 } 701 702 703 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 704 return true; 705 706 out: 707 708 return false; 709 } 710 711 static void intel_fbdev_suspend_worker(struct work_struct *work) 712 { 713 intel_fbdev_set_suspend(container_of(work, 714 struct drm_i915_private, 715 fbdev_suspend_work)->dev, 716 FBINFO_STATE_RUNNING, 717 true); 718 } 719 720 int intel_fbdev_init(struct drm_device *dev) 721 { 722 struct intel_fbdev *ifbdev; 723 struct drm_i915_private *dev_priv = dev->dev_private; 724 int ret; 725 726 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) 727 return -ENODEV; 728 729 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 730 if (ifbdev == NULL) 731 return -ENOMEM; 732 733 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 734 735 if (!intel_fbdev_init_bios(dev, ifbdev)) 736 ifbdev->preferred_bpp = 32; 737 738 ret = drm_fb_helper_init(dev, &ifbdev->helper, 739 INTEL_INFO(dev)->num_pipes, 4); 740 if (ret) { 741 kfree(ifbdev); 742 return ret; 743 } 744 745 ifbdev->helper.atomic = true; 746 747 dev_priv->fbdev = ifbdev; 748 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 749 750 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 751 752 return 0; 753 } 754 755 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 756 { 757 struct drm_i915_private *dev_priv = data; 758 struct intel_fbdev *ifbdev = dev_priv->fbdev; 759 760 /* Due to peculiar init order wrt to hpd handling this is separate. */ 761 if (drm_fb_helper_initial_config(&ifbdev->helper, 762 ifbdev->preferred_bpp)) 763 intel_fbdev_fini(dev_priv->dev); 764 } 765 766 void intel_fbdev_initial_config_async(struct drm_device *dev) 767 { 768 async_schedule(intel_fbdev_initial_config, to_i915(dev)); 769 } 770 771 void intel_fbdev_fini(struct drm_device *dev) 772 { 773 struct drm_i915_private *dev_priv = dev->dev_private; 774 if (!dev_priv->fbdev) 775 return; 776 777 #if 0 778 flush_work(&dev_priv->fbdev_suspend_work); 779 780 if (!current_is_async()) 781 #endif 782 async_synchronize_full(); 783 intel_fbdev_destroy(dev, dev_priv->fbdev); 784 kfree(dev_priv->fbdev); 785 dev_priv->fbdev = NULL; 786 } 787 788 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 789 { 790 #if 0 791 struct drm_i915_private *dev_priv = dev->dev_private; 792 struct intel_fbdev *ifbdev = dev_priv->fbdev; 793 struct fb_info *info; 794 795 if (!ifbdev) 796 return; 797 798 info = ifbdev->helper.fbdev; 799 800 if (synchronous) { 801 /* Flush any pending work to turn the console on, and then 802 * wait to turn it off. It must be synchronous as we are 803 * about to suspend or unload the driver. 804 * 805 * Note that from within the work-handler, we cannot flush 806 * ourselves, so only flush outstanding work upon suspend! 807 */ 808 if (state != FBINFO_STATE_RUNNING) 809 flush_work(&dev_priv->fbdev_suspend_work); 810 console_lock(); 811 } else { 812 /* 813 * The console lock can be pretty contented on resume due 814 * to all the printk activity. Try to keep it out of the hot 815 * path of resume if possible. 816 */ 817 WARN_ON(state != FBINFO_STATE_RUNNING); 818 if (!console_trylock()) { 819 /* Don't block our own workqueue as this can 820 * be run in parallel with other i915.ko tasks. 821 */ 822 schedule_work(&dev_priv->fbdev_suspend_work); 823 return; 824 } 825 } 826 827 /* On resume from hibernation: If the object is shmemfs backed, it has 828 * been restored from swap. If the object is stolen however, it will be 829 * full of whatever garbage was left in there. 830 */ 831 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) 832 memset_io(info->screen_base, 0, info->screen_size); 833 834 drm_fb_helper_set_suspend(&ifbdev->helper, state); 835 console_unlock(); 836 #endif 837 } 838 839 void intel_fbdev_output_poll_changed(struct drm_device *dev) 840 { 841 struct drm_i915_private *dev_priv = dev->dev_private; 842 if (dev_priv->fbdev) 843 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper); 844 } 845 846 void intel_fbdev_restore_mode(struct drm_device *dev) 847 { 848 int ret; 849 struct drm_i915_private *dev_priv = dev->dev_private; 850 struct intel_fbdev *ifbdev = dev_priv->fbdev; 851 struct drm_fb_helper *fb_helper; 852 853 if (!ifbdev) 854 return; 855 856 fb_helper = &ifbdev->helper; 857 858 /* XXX: avoid dead-locking the Xorg on exit */ 859 if (mutex_is_locked(&dev->mode_config.mutex)) { 860 DRM_ERROR("fubar while trying to restore kms_console\n"); 861 return; /* drm_modeset_unlock_all(dev) ? */ 862 } 863 864 ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); 865 if (ret) { 866 DRM_DEBUG("failed to restore crtc mode\n"); 867 } else { 868 mutex_lock(&fb_helper->dev->struct_mutex); 869 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); 870 mutex_unlock(&fb_helper->dev->struct_mutex); 871 } 872 } 873