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/module.h> 29 #include <linux/kernel.h> 30 #include <linux/console.h> 31 #include <linux/errno.h> 32 #include <linux/string.h> 33 #include <linux/mm.h> 34 #include <linux/tty.h> 35 #include <linux/sysrq.h> 36 #include <linux/delay.h> 37 #include <linux/init.h> 38 #include <linux/vga_switcheroo.h> 39 40 #include <drm/drmP.h> 41 #include <drm/drm_crtc.h> 42 #include <drm/drm_fb_helper.h> 43 #include "intel_drv.h" 44 #include "intel_frontbuffer.h" 45 #include <drm/i915_drm.h> 46 #include "i915_drv.h" 47 48 static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev) 49 { 50 struct drm_i915_gem_object *obj = ifbdev->fb->obj; 51 unsigned int origin = ifbdev->vma->fence ? ORIGIN_GTT : ORIGIN_CPU; 52 53 intel_fb_obj_invalidate(obj, origin); 54 } 55 56 static int intel_fbdev_set_par(struct fb_info *info) 57 { 58 struct drm_fb_helper *fb_helper = info->par; 59 struct intel_fbdev *ifbdev = 60 container_of(fb_helper, struct intel_fbdev, helper); 61 int ret; 62 63 ret = drm_fb_helper_set_par(info); 64 if (ret == 0) 65 intel_fbdev_invalidate(ifbdev); 66 67 return ret; 68 } 69 70 static int intel_fbdev_blank(int blank, struct fb_info *info) 71 { 72 struct drm_fb_helper *fb_helper = info->par; 73 struct intel_fbdev *ifbdev = 74 container_of(fb_helper, struct intel_fbdev, helper); 75 int ret; 76 77 ret = drm_fb_helper_blank(blank, info); 78 if (ret == 0) 79 intel_fbdev_invalidate(ifbdev); 80 81 return ret; 82 } 83 84 #if 0 85 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 86 struct fb_info *info) 87 { 88 struct drm_fb_helper *fb_helper = info->par; 89 struct intel_fbdev *ifbdev = 90 container_of(fb_helper, struct intel_fbdev, helper); 91 int ret; 92 93 ret = drm_fb_helper_pan_display(var, info); 94 if (ret == 0) 95 intel_fbdev_invalidate(ifbdev); 96 97 return ret; 98 } 99 #endif 100 101 static struct fb_ops intelfb_ops = { 102 #if 0 103 .owner = THIS_MODULE, 104 #endif 105 DRM_FB_HELPER_DEFAULT_OPS, 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 }; 115 116 static int intelfb_alloc(struct drm_fb_helper *helper, 117 struct drm_fb_helper_surface_size *sizes) 118 { 119 struct intel_fbdev *ifbdev = 120 container_of(helper, struct intel_fbdev, helper); 121 struct drm_framebuffer *fb; 122 struct drm_device *dev = helper->dev; 123 struct drm_i915_private *dev_priv = to_i915(dev); 124 struct i915_ggtt *ggtt = &dev_priv->ggtt; 125 struct drm_mode_fb_cmd2 mode_cmd = {}; 126 struct drm_i915_gem_object *obj; 127 int size, ret; 128 129 /* we don't do packed 24bpp */ 130 if (sizes->surface_bpp == 24) 131 sizes->surface_bpp = 32; 132 133 mode_cmd.width = sizes->surface_width; 134 mode_cmd.height = sizes->surface_height; 135 136 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 137 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 138 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 139 sizes->surface_depth); 140 141 size = mode_cmd.pitches[0] * mode_cmd.height; 142 size = PAGE_ALIGN(size); 143 144 /* If the FB is too big, just don't use it since fbdev is not very 145 * important and we should probably use that space with FBC or other 146 * features. */ 147 obj = NULL; 148 if (size * 2 < ggtt->stolen_usable_size) 149 obj = i915_gem_object_create_stolen(dev_priv, size); 150 if (obj == NULL) 151 obj = i915_gem_object_create(dev_priv, size); 152 if (IS_ERR(obj)) { 153 DRM_ERROR("failed to allocate framebuffer\n"); 154 ret = PTR_ERR(obj); 155 goto err; 156 } 157 158 fb = intel_framebuffer_create(obj, &mode_cmd); 159 if (IS_ERR(fb)) { 160 ret = PTR_ERR(fb); 161 goto err_obj; 162 } 163 164 ifbdev->fb = to_intel_framebuffer(fb); 165 166 return 0; 167 168 err_obj: 169 i915_gem_object_put(obj); 170 err: 171 return ret; 172 } 173 174 static int intelfb_create(struct drm_fb_helper *helper, 175 struct drm_fb_helper_surface_size *sizes) 176 { 177 struct intel_fbdev *ifbdev = 178 container_of(helper, struct intel_fbdev, helper); 179 struct intel_framebuffer *intel_fb = ifbdev->fb; 180 struct drm_device *dev = helper->dev; 181 struct drm_i915_private *dev_priv = to_i915(dev); 182 struct pci_dev *pdev = dev_priv->drm.pdev; 183 struct i915_ggtt *ggtt = &dev_priv->ggtt; 184 struct fb_info *info; 185 struct drm_framebuffer *fb; 186 struct i915_vma *vma; 187 bool prealloc = false; 188 void __iomem *vaddr; 189 int ret; 190 device_t vga_dev; 191 192 if (intel_fb && 193 (sizes->fb_width > intel_fb->base.width || 194 sizes->fb_height > intel_fb->base.height)) { 195 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 196 " releasing it\n", 197 intel_fb->base.width, intel_fb->base.height, 198 sizes->fb_width, sizes->fb_height); 199 drm_framebuffer_unreference(&intel_fb->base); 200 intel_fb = ifbdev->fb = NULL; 201 } 202 if (!intel_fb || WARN_ON(!intel_fb->obj)) { 203 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 204 ret = intelfb_alloc(helper, sizes); 205 if (ret) 206 return ret; 207 intel_fb = ifbdev->fb; 208 } else { 209 DRM_DEBUG_KMS("re-using BIOS fb\n"); 210 prealloc = true; 211 sizes->fb_width = intel_fb->base.width; 212 sizes->fb_height = intel_fb->base.height; 213 } 214 215 mutex_lock(&dev->struct_mutex); 216 217 /* Pin the GGTT vma for our access via info->screen_base. 218 * This also validates that any existing fb inherited from the 219 * BIOS is suitable for own access. 220 */ 221 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, DRM_ROTATE_0); 222 if (IS_ERR(vma)) { 223 ret = PTR_ERR(vma); 224 goto out_unlock; 225 } 226 227 info = drm_fb_helper_alloc_fbi(helper); 228 if (IS_ERR(info)) { 229 DRM_ERROR("Failed to allocate fb_info\n"); 230 ret = PTR_ERR(info); 231 goto out_unpin; 232 } 233 234 info->par = helper; 235 236 fb = &ifbdev->fb->base; 237 238 ifbdev->helper.fb = fb; 239 240 #ifdef __DragonFly__ 241 vga_dev = device_get_parent(dev->dev->bsddev); 242 info->width = sizes->fb_width; 243 info->height = sizes->fb_height; 244 info->stride = fb->pitches[0]; 245 info->depth = sizes->surface_bpp; 246 info->paddr = ggtt->mappable_base + vma->node.start; 247 info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev); 248 info->fbops = intelfb_ops; 249 250 #else 251 strcpy(info->fix.id, "inteldrmfb"); 252 253 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 254 info->fbops = &intelfb_ops; 255 256 /* setup aperture base/size for vesafb takeover */ 257 info->apertures->ranges[0].base = dev->mode_config.fb_base; 258 info->apertures->ranges[0].size = ggtt->mappable_end; 259 260 info->fix.smem_start = dev->mode_config.fb_base + i915_ggtt_offset(vma); 261 info->fix.smem_len = vma->node.size; 262 #endif 263 264 vaddr = i915_vma_pin_iomap(vma); 265 if (IS_ERR(vaddr)) { 266 DRM_ERROR("Failed to remap framebuffer into virtual memory\n"); 267 ret = PTR_ERR(vaddr); 268 goto out_unpin; 269 } 270 #ifdef __DragonFly__ 271 info->vaddr = (vm_offset_t)vaddr; 272 #else 273 info->screen_base = vaddr; 274 info->screen_size = vma->node.size; 275 276 /* This driver doesn't need a VT switch to restore the mode on resume */ 277 info->skip_vt_switch = true; 278 279 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth); 280 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 281 282 /* If the object is shmemfs backed, it will have given us zeroed pages. 283 * If the object is stolen however, it will be full of whatever 284 * garbage was left in there. 285 */ 286 if (intel_fb->obj->stolen && !prealloc) 287 memset_io(info->screen_base, 0, info->screen_size); 288 #endif 289 290 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 291 292 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x\n", 293 fb->width, fb->height, i915_ggtt_offset(vma)); 294 ifbdev->vma = vma; 295 296 mutex_unlock(&dev->struct_mutex); 297 vga_switcheroo_client_fb_set(pdev, info); 298 return 0; 299 300 out_unpin: 301 intel_unpin_fb_vma(vma); 302 out_unlock: 303 mutex_unlock(&dev->struct_mutex); 304 return ret; 305 } 306 307 /** Sets the color ramps on behalf of RandR */ 308 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 309 u16 blue, int regno) 310 { 311 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 312 313 intel_crtc->lut_r[regno] = red >> 8; 314 intel_crtc->lut_g[regno] = green >> 8; 315 intel_crtc->lut_b[regno] = blue >> 8; 316 } 317 318 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 319 u16 *blue, int regno) 320 { 321 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 322 323 *red = intel_crtc->lut_r[regno] << 8; 324 *green = intel_crtc->lut_g[regno] << 8; 325 *blue = intel_crtc->lut_b[regno] << 8; 326 } 327 328 static struct drm_fb_helper_crtc * 329 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) 330 { 331 int i; 332 333 for (i = 0; i < fb_helper->crtc_count; i++) 334 if (fb_helper->crtc_info[i].mode_set.crtc == crtc) 335 return &fb_helper->crtc_info[i]; 336 337 return NULL; 338 } 339 340 /* 341 * Try to read the BIOS display configuration and use it for the initial 342 * fb configuration. 343 * 344 * The BIOS or boot loader will generally create an initial display 345 * configuration for us that includes some set of active pipes and displays. 346 * This routine tries to figure out which pipes and connectors are active 347 * and stuffs them into the crtcs and modes array given to us by the 348 * drm_fb_helper code. 349 * 350 * The overall sequence is: 351 * intel_fbdev_init - from driver load 352 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data 353 * drm_fb_helper_init - build fb helper structs 354 * drm_fb_helper_single_add_all_connectors - more fb helper structs 355 * intel_fbdev_initial_config - apply the config 356 * drm_fb_helper_initial_config - call ->probe then register_framebuffer() 357 * drm_setup_crtcs - build crtc config for fbdev 358 * intel_fb_initial_config - find active connectors etc 359 * drm_fb_helper_single_fb_probe - set up fbdev 360 * intelfb_create - re-use or alloc fb, build out fbdev structs 361 * 362 * Note that we don't make special consideration whether we could actually 363 * switch to the selected modes without a full modeset. E.g. when the display 364 * is in VGA mode we need to recalculate watermarks and set a new high-res 365 * framebuffer anyway. 366 */ 367 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, 368 struct drm_fb_helper_crtc **crtcs, 369 struct drm_display_mode **modes, 370 struct drm_fb_offset *offsets, 371 bool *enabled, int width, int height) 372 { 373 struct drm_i915_private *dev_priv = to_i915(fb_helper->dev); 374 unsigned long conn_configured, conn_seq, mask; 375 unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG); 376 int i, j; 377 bool *save_enabled; 378 bool fallback = true; 379 int num_connectors_enabled = 0; 380 int num_connectors_detected = 0; 381 382 save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); 383 if (!save_enabled) 384 return false; 385 386 memcpy(save_enabled, enabled, count); 387 mask = GENMASK(count - 1, 0); 388 conn_configured = 0; 389 retry: 390 conn_seq = conn_configured; 391 for (i = 0; i < count; i++) { 392 struct drm_fb_helper_connector *fb_conn; 393 struct drm_connector *connector; 394 struct drm_encoder *encoder; 395 struct drm_fb_helper_crtc *new_crtc; 396 struct intel_crtc *intel_crtc; 397 398 fb_conn = fb_helper->connector_info[i]; 399 connector = fb_conn->connector; 400 401 if (conn_configured & BIT(i)) 402 continue; 403 404 if (conn_seq == 0 && !connector->has_tile) 405 continue; 406 407 if (connector->status == connector_status_connected) 408 num_connectors_detected++; 409 410 if (!enabled[i]) { 411 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 412 connector->name); 413 conn_configured |= BIT(i); 414 continue; 415 } 416 417 if (connector->force == DRM_FORCE_OFF) { 418 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 419 connector->name); 420 enabled[i] = false; 421 continue; 422 } 423 424 encoder = connector->state->best_encoder; 425 if (!encoder || WARN_ON(!connector->state->crtc)) { 426 if (connector->force > DRM_FORCE_OFF) 427 goto bail; 428 429 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 430 connector->name); 431 enabled[i] = false; 432 conn_configured |= BIT(i); 433 continue; 434 } 435 436 num_connectors_enabled++; 437 438 intel_crtc = to_intel_crtc(connector->state->crtc); 439 for (j = 0; j < 256; j++) { 440 intel_crtc->lut_r[j] = j; 441 intel_crtc->lut_g[j] = j; 442 intel_crtc->lut_b[j] = j; 443 } 444 445 new_crtc = intel_fb_helper_crtc(fb_helper, 446 connector->state->crtc); 447 448 /* 449 * Make sure we're not trying to drive multiple connectors 450 * with a single CRTC, since our cloning support may not 451 * match the BIOS. 452 */ 453 for (j = 0; j < count; j++) { 454 if (crtcs[j] == new_crtc) { 455 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 456 goto bail; 457 } 458 } 459 460 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 461 connector->name); 462 463 /* go for command line mode first */ 464 modes[i] = drm_pick_cmdline_mode(fb_conn); 465 466 /* try for preferred next */ 467 if (!modes[i]) { 468 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", 469 connector->name, connector->has_tile); 470 modes[i] = drm_has_preferred_mode(fb_conn, width, 471 height); 472 } 473 474 /* No preferred mode marked by the EDID? Are there any modes? */ 475 if (!modes[i] && !list_empty(&connector->modes)) { 476 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 477 connector->name); 478 modes[i] = list_first_entry(&connector->modes, 479 struct drm_display_mode, 480 head); 481 } 482 483 /* last resort: use current mode */ 484 if (!modes[i]) { 485 /* 486 * IMPORTANT: We want to use the adjusted mode (i.e. 487 * after the panel fitter upscaling) as the initial 488 * config, not the input mode, which is what crtc->mode 489 * usually contains. But since our current 490 * code puts a mode derived from the post-pfit timings 491 * into crtc->mode this works out correctly. 492 * 493 * This is crtc->mode and not crtc->state->mode for the 494 * fastboot check to work correctly. crtc_state->mode has 495 * I915_MODE_FLAG_INHERITED, which we clear to force check 496 * state. 497 */ 498 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 499 connector->name); 500 modes[i] = &connector->state->crtc->mode; 501 } 502 crtcs[i] = new_crtc; 503 504 DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n", 505 connector->name, 506 connector->state->crtc->base.id, 507 connector->state->crtc->name, 508 modes[i]->hdisplay, modes[i]->vdisplay, 509 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 510 511 fallback = false; 512 conn_configured |= BIT(i); 513 } 514 515 if ((conn_configured & mask) != mask && conn_configured != conn_seq) 516 goto retry; 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_priv)->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, count); 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 intel_fbdev *ifbdev) 551 { 552 /* We rely on the object-free to release the VMA pinning for 553 * the info->screen_base mmaping. Leaking the VMA is simpler than 554 * trying to rectify all the possible error paths leading here. 555 */ 556 557 drm_fb_helper_unregister_fbi(&ifbdev->helper); 558 559 drm_fb_helper_fini(&ifbdev->helper); 560 561 if (ifbdev->vma) { 562 mutex_lock(&ifbdev->helper.dev->struct_mutex); 563 intel_unpin_fb_vma(ifbdev->vma); 564 mutex_unlock(&ifbdev->helper.dev->struct_mutex); 565 } 566 567 if (ifbdev->fb) 568 drm_framebuffer_remove(&ifbdev->fb->base); 569 570 kfree(ifbdev); 571 } 572 573 /* 574 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 575 * The core display code will have read out the current plane configuration, 576 * so we use that to figure out if there's an object for us to use as the 577 * fb, and if so, we re-use it for the fbdev configuration. 578 * 579 * Note we only support a single fb shared across pipes for boot (mostly for 580 * fbcon), so we just find the biggest and use that. 581 */ 582 static bool intel_fbdev_init_bios(struct drm_device *dev, 583 struct intel_fbdev *ifbdev) 584 { 585 struct intel_framebuffer *fb = NULL; 586 struct drm_crtc *crtc; 587 struct intel_crtc *intel_crtc; 588 unsigned int max_size = 0; 589 590 /* Find the largest fb */ 591 for_each_crtc(dev, crtc) { 592 struct drm_i915_gem_object *obj = 593 intel_fb_obj(crtc->primary->state->fb); 594 intel_crtc = to_intel_crtc(crtc); 595 596 if (!crtc->state->active || !obj) { 597 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 598 pipe_name(intel_crtc->pipe)); 599 continue; 600 } 601 602 if (obj->base.size > max_size) { 603 DRM_DEBUG_KMS("found possible fb from plane %c\n", 604 pipe_name(intel_crtc->pipe)); 605 fb = to_intel_framebuffer(crtc->primary->state->fb); 606 max_size = obj->base.size; 607 } 608 } 609 610 if (!fb) { 611 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 612 goto out; 613 } 614 615 /* Now make sure all the pipes will fit into it */ 616 for_each_crtc(dev, crtc) { 617 unsigned int cur_size; 618 619 intel_crtc = to_intel_crtc(crtc); 620 621 if (!crtc->state->active) { 622 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 623 pipe_name(intel_crtc->pipe)); 624 continue; 625 } 626 627 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 628 pipe_name(intel_crtc->pipe)); 629 630 /* 631 * See if the plane fb we found above will fit on this 632 * pipe. Note we need to use the selected fb's pitch and bpp 633 * rather than the current pipe's, since they differ. 634 */ 635 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay; 636 cur_size = cur_size * fb->base.format->cpp[0]; 637 if (fb->base.pitches[0] < cur_size) { 638 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 639 pipe_name(intel_crtc->pipe), 640 cur_size, fb->base.pitches[0]); 641 fb = NULL; 642 break; 643 } 644 645 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay; 646 cur_size = intel_fb_align_height(&fb->base, 0, cur_size); 647 cur_size *= fb->base.pitches[0]; 648 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 649 pipe_name(intel_crtc->pipe), 650 intel_crtc->config->base.adjusted_mode.crtc_hdisplay, 651 intel_crtc->config->base.adjusted_mode.crtc_vdisplay, 652 fb->base.format->cpp[0] * 8, 653 cur_size); 654 655 if (cur_size > max_size) { 656 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 657 pipe_name(intel_crtc->pipe), 658 cur_size, max_size); 659 fb = NULL; 660 break; 661 } 662 663 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 664 pipe_name(intel_crtc->pipe), 665 max_size, cur_size); 666 } 667 668 if (!fb) { 669 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 670 goto out; 671 } 672 673 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; 674 ifbdev->fb = fb; 675 676 drm_framebuffer_reference(&ifbdev->fb->base); 677 678 /* Final pass to check if any active pipes don't have fbs */ 679 for_each_crtc(dev, crtc) { 680 intel_crtc = to_intel_crtc(crtc); 681 682 if (!crtc->state->active) 683 continue; 684 685 WARN(!crtc->primary->fb, 686 "re-used BIOS config but lost an fb on crtc %d\n", 687 crtc->base.id); 688 } 689 690 691 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 692 return true; 693 694 out: 695 696 return false; 697 } 698 699 static void intel_fbdev_suspend_worker(struct work_struct *work) 700 { 701 intel_fbdev_set_suspend(&container_of(work, 702 struct drm_i915_private, 703 fbdev_suspend_work)->drm, 704 FBINFO_STATE_RUNNING, 705 true); 706 } 707 708 int intel_fbdev_init(struct drm_device *dev) 709 { 710 struct drm_i915_private *dev_priv = to_i915(dev); 711 struct intel_fbdev *ifbdev; 712 int ret; 713 714 if (WARN_ON(INTEL_INFO(dev_priv)->num_pipes == 0)) 715 return -ENODEV; 716 717 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 718 if (ifbdev == NULL) 719 return -ENOMEM; 720 721 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 722 723 if (!intel_fbdev_init_bios(dev, ifbdev)) 724 ifbdev->preferred_bpp = 32; 725 726 ret = drm_fb_helper_init(dev, &ifbdev->helper, 4); 727 if (ret) { 728 kfree(ifbdev); 729 return ret; 730 } 731 732 dev_priv->fbdev = ifbdev; 733 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 734 735 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 736 737 return 0; 738 } 739 740 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 741 { 742 struct intel_fbdev *ifbdev = data; 743 744 /* Due to peculiar init order wrt to hpd handling this is separate. */ 745 if (drm_fb_helper_initial_config(&ifbdev->helper, 746 ifbdev->preferred_bpp)) 747 intel_fbdev_fini(ifbdev->helper.dev); 748 } 749 750 void intel_fbdev_initial_config_async(struct drm_device *dev) 751 { 752 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 753 754 if (!ifbdev) 755 return; 756 757 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 758 } 759 760 static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 761 { 762 if (!ifbdev->cookie) 763 return; 764 765 /* Only serialises with all preceding async calls, hence +1 */ 766 async_synchronize_cookie(ifbdev->cookie + 1); 767 ifbdev->cookie = 0; 768 } 769 770 void intel_fbdev_fini(struct drm_device *dev) 771 { 772 struct drm_i915_private *dev_priv = to_i915(dev); 773 struct intel_fbdev *ifbdev = dev_priv->fbdev; 774 775 if (!ifbdev) 776 return; 777 778 cancel_work_sync(&dev_priv->fbdev_suspend_work); 779 if (!current_is_async()) 780 intel_fbdev_sync(ifbdev); 781 782 intel_fbdev_destroy(ifbdev); 783 dev_priv->fbdev = NULL; 784 } 785 786 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 787 { 788 #if 0 789 struct drm_i915_private *dev_priv = to_i915(dev); 790 struct intel_fbdev *ifbdev = dev_priv->fbdev; 791 struct fb_info *info; 792 793 if (!ifbdev || !ifbdev->vma) 794 return; 795 796 info = ifbdev->helper.fbdev; 797 798 if (synchronous) { 799 /* Flush any pending work to turn the console on, and then 800 * wait to turn it off. It must be synchronous as we are 801 * about to suspend or unload the driver. 802 * 803 * Note that from within the work-handler, we cannot flush 804 * ourselves, so only flush outstanding work upon suspend! 805 */ 806 if (state != FBINFO_STATE_RUNNING) 807 flush_work(&dev_priv->fbdev_suspend_work); 808 console_lock(); 809 } else { 810 /* 811 * The console lock can be pretty contented on resume due 812 * to all the printk activity. Try to keep it out of the hot 813 * path of resume if possible. 814 */ 815 WARN_ON(state != FBINFO_STATE_RUNNING); 816 if (!console_trylock()) { 817 /* Don't block our own workqueue as this can 818 * be run in parallel with other i915.ko tasks. 819 */ 820 schedule_work(&dev_priv->fbdev_suspend_work); 821 return; 822 } 823 } 824 825 /* On resume from hibernation: If the object is shmemfs backed, it has 826 * been restored from swap. If the object is stolen however, it will be 827 * full of whatever garbage was left in there. 828 */ 829 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) 830 memset_io(info->screen_base, 0, info->screen_size); 831 832 drm_fb_helper_set_suspend(&ifbdev->helper, state); 833 console_unlock(); 834 #endif 835 } 836 837 void intel_fbdev_output_poll_changed(struct drm_device *dev) 838 { 839 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 840 841 if (ifbdev && ifbdev->vma) 842 drm_fb_helper_hotplug_event(&ifbdev->helper); 843 } 844 845 void intel_fbdev_restore_mode(struct drm_device *dev) 846 { 847 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 848 849 if (!ifbdev) 850 return; 851 852 intel_fbdev_sync(ifbdev); 853 if (!ifbdev->vma) 854 return; 855 856 #ifdef __DragonFly__ 857 /* XXX: avoid dead-locking the Xorg on exit */ 858 if (mutex_is_locked(&dev->mode_config.mutex)) { 859 DRM_ERROR("fubar while trying to restore kms_console\n"); 860 return; /* drm_modeset_unlock_all(dev) ? */ 861 } 862 #endif 863 864 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) 865 intel_fbdev_invalidate(ifbdev); 866 } 867