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 #if 0 45 static int intel_fbdev_set_par(struct fb_info *info) 46 { 47 struct drm_fb_helper *fb_helper = info->par; 48 struct intel_fbdev *ifbdev = 49 container_of(fb_helper, struct intel_fbdev, helper); 50 int ret; 51 52 ret = drm_fb_helper_set_par(info); 53 54 if (ret == 0) { 55 /* 56 * FIXME: fbdev presumes that all callbacks also work from 57 * atomic contexts and relies on that for emergency oops 58 * printing. KMS totally doesn't do that and the locking here is 59 * by far not the only place this goes wrong. Ignore this for 60 * now until we solve this for real. 61 */ 62 mutex_lock(&fb_helper->dev->struct_mutex); 63 ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj, 64 true); 65 mutex_unlock(&fb_helper->dev->struct_mutex); 66 } 67 68 return ret; 69 } 70 71 static int intel_fbdev_blank(int blank, struct fb_info *info) 72 { 73 struct drm_fb_helper *fb_helper = info->par; 74 struct intel_fbdev *ifbdev = 75 container_of(fb_helper, struct intel_fbdev, helper); 76 int ret; 77 78 ret = drm_fb_helper_blank(blank, info); 79 80 if (ret == 0) { 81 /* 82 * FIXME: fbdev presumes that all callbacks also work from 83 * atomic contexts and relies on that for emergency oops 84 * printing. KMS totally doesn't do that and the locking here is 85 * by far not the only place this goes wrong. Ignore this for 86 * now until we solve this for real. 87 */ 88 mutex_lock(&fb_helper->dev->struct_mutex); 89 intel_fb_obj_invalidate(ifbdev->fb->obj, NULL, ORIGIN_GTT); 90 mutex_unlock(&fb_helper->dev->struct_mutex); 91 } 92 93 return ret; 94 } 95 96 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 97 struct fb_info *info) 98 { 99 struct drm_fb_helper *fb_helper = info->par; 100 struct intel_fbdev *ifbdev = 101 container_of(fb_helper, struct intel_fbdev, helper); 102 103 int ret; 104 ret = drm_fb_helper_pan_display(var, info); 105 106 if (ret == 0) { 107 /* 108 * FIXME: fbdev presumes that all callbacks also work from 109 * atomic contexts and relies on that for emergency oops 110 * printing. KMS totally doesn't do that and the locking here is 111 * by far not the only place this goes wrong. Ignore this for 112 * now until we solve this for real. 113 */ 114 mutex_lock(&fb_helper->dev->struct_mutex); 115 intel_fb_obj_invalidate(ifbdev->fb->obj, NULL, ORIGIN_GTT); 116 mutex_unlock(&fb_helper->dev->struct_mutex); 117 } 118 119 return ret; 120 } 121 122 static struct fb_ops intelfb_ops = { 123 .owner = THIS_MODULE, 124 .fb_check_var = drm_fb_helper_check_var, 125 .fb_set_par = intel_fbdev_set_par, 126 .fb_fillrect = cfb_fillrect, 127 .fb_copyarea = cfb_copyarea, 128 .fb_imageblit = cfb_imageblit, 129 .fb_pan_display = intel_fbdev_pan_display, 130 .fb_blank = intel_fbdev_blank, 131 .fb_setcmap = drm_fb_helper_setcmap, 132 .fb_debug_enter = drm_fb_helper_debug_enter, 133 .fb_debug_leave = drm_fb_helper_debug_leave, 134 }; 135 #endif 136 137 static int intelfb_alloc(struct drm_fb_helper *helper, 138 struct drm_fb_helper_surface_size *sizes) 139 { 140 struct intel_fbdev *ifbdev = 141 container_of(helper, struct intel_fbdev, helper); 142 struct drm_framebuffer *fb; 143 struct drm_device *dev = helper->dev; 144 struct drm_mode_fb_cmd2 mode_cmd = {}; 145 struct drm_i915_gem_object *obj; 146 int size, ret; 147 148 /* we don't do packed 24bpp */ 149 if (sizes->surface_bpp == 24) 150 sizes->surface_bpp = 32; 151 152 mode_cmd.width = sizes->surface_width; 153 mode_cmd.height = sizes->surface_height; 154 155 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 156 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 157 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 158 sizes->surface_depth); 159 160 size = mode_cmd.pitches[0] * mode_cmd.height; 161 size = PAGE_ALIGN(size); 162 obj = i915_gem_object_create_stolen(dev, size); 163 if (obj == NULL) 164 obj = i915_gem_alloc_object(dev, size); 165 if (!obj) { 166 DRM_ERROR("failed to allocate framebuffer\n"); 167 ret = -ENOMEM; 168 goto out; 169 } 170 171 fb = __intel_framebuffer_create(dev, &mode_cmd, obj); 172 if (IS_ERR(fb)) { 173 ret = PTR_ERR(fb); 174 goto out_unref; 175 } 176 177 /* Flush everything out, we'll be doing GTT only from now on */ 178 ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL, NULL); 179 if (ret) { 180 DRM_ERROR("failed to pin obj: %d\n", ret); 181 goto out_fb; 182 } 183 184 ifbdev->fb = to_intel_framebuffer(fb); 185 186 return 0; 187 188 out_fb: 189 drm_framebuffer_remove(fb); 190 out_unref: 191 drm_gem_object_unreference(&obj->base); 192 out: 193 return ret; 194 } 195 196 static int intelfb_create(struct drm_fb_helper *helper, 197 struct drm_fb_helper_surface_size *sizes) 198 { 199 struct intel_fbdev *ifbdev = 200 container_of(helper, struct intel_fbdev, helper); 201 struct intel_framebuffer *intel_fb = ifbdev->fb; 202 struct drm_device *dev = helper->dev; 203 struct drm_i915_private *dev_priv = dev->dev_private; 204 struct fb_info *info; 205 struct drm_framebuffer *fb; 206 struct drm_i915_gem_object *obj; 207 device_t vga_dev; 208 int size, ret; 209 bool prealloc = false; 210 211 mutex_lock(&dev->struct_mutex); 212 213 if (intel_fb && 214 (sizes->fb_width > intel_fb->base.width || 215 sizes->fb_height > intel_fb->base.height)) { 216 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 217 " releasing it\n", 218 intel_fb->base.width, intel_fb->base.height, 219 sizes->fb_width, sizes->fb_height); 220 drm_framebuffer_unreference(&intel_fb->base); 221 intel_fb = ifbdev->fb = NULL; 222 } 223 if (!intel_fb || WARN_ON(!intel_fb->obj)) { 224 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 225 ret = intelfb_alloc(helper, sizes); 226 if (ret) 227 goto out_unlock; 228 intel_fb = ifbdev->fb; 229 } else { 230 DRM_DEBUG_KMS("re-using BIOS fb\n"); 231 prealloc = true; 232 sizes->fb_width = intel_fb->base.width; 233 sizes->fb_height = intel_fb->base.height; 234 } 235 236 obj = intel_fb->obj; 237 size = obj->base.size; 238 239 #if 0 240 info = framebuffer_alloc(0, &dev->pdev->dev); 241 #else 242 info = kmalloc(sizeof(struct fb_info), M_DRM, M_WAITOK | M_ZERO); 243 #endif 244 if (!info) { 245 ret = -ENOMEM; 246 goto out_unpin; 247 } 248 249 #if 0 250 info->par = helper; 251 #endif 252 253 fb = &ifbdev->fb->base; 254 255 #ifdef __DragonFly__ 256 vga_dev = device_get_parent(dev->dev); 257 info->width = sizes->fb_width; 258 info->height = sizes->fb_height; 259 info->stride = fb->pitches[0]; 260 info->depth = sizes->surface_bpp; 261 info->paddr = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj); 262 info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev); 263 info->vaddr = 264 (vm_offset_t)pmap_mapdev_attr(info->paddr, 265 sizes->surface_height * info->stride, 266 VM_MEMATTR_WRITE_COMBINING); 267 #endif 268 269 ifbdev->helper.fb = fb; 270 ifbdev->helper.fbdev = info; 271 272 #if 0 273 strcpy(info->fix.id, "inteldrmfb"); 274 275 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 276 info->fbops = &intelfb_ops; 277 278 ret = fb_alloc_cmap(&info->cmap, 256, 0); 279 if (ret) { 280 ret = -ENOMEM; 281 goto out_unpin; 282 } 283 /* setup aperture base/size for vesafb takeover */ 284 info->apertures = alloc_apertures(1); 285 if (!info->apertures) { 286 ret = -ENOMEM; 287 goto out_unpin; 288 } 289 info->apertures->ranges[0].base = dev->mode_config.fb_base; 290 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end; 291 292 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj); 293 info->fix.smem_len = size; 294 295 info->screen_base = 296 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj), 297 size); 298 if (!info->screen_base) { 299 ret = -ENOSPC; 300 goto out_unpin; 301 } 302 info->screen_size = size; 303 304 /* This driver doesn't need a VT switch to restore the mode on resume */ 305 info->skip_vt_switch = true; 306 307 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 308 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 309 310 /* If the object is shmemfs backed, it will have given us zeroed pages. 311 * If the object is stolen however, it will be full of whatever 312 * garbage was left in there. 313 */ 314 if (ifbdev->fb->obj->stolen && !prealloc) 315 memset_io(info->screen_base, 0, info->screen_size); 316 317 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 318 #endif 319 320 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n", 321 fb->width, fb->height, 322 i915_gem_obj_ggtt_offset(obj), obj); 323 324 mutex_unlock(&dev->struct_mutex); 325 #if 0 326 vga_switcheroo_client_fb_set(dev->pdev, info); 327 #endif 328 return 0; 329 330 out_unpin: 331 i915_gem_object_ggtt_unpin(obj); 332 drm_gem_object_unreference(&obj->base); 333 out_unlock: 334 mutex_unlock(&dev->struct_mutex); 335 return ret; 336 } 337 338 /** Sets the color ramps on behalf of RandR */ 339 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 340 u16 blue, int regno) 341 { 342 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 343 344 intel_crtc->lut_r[regno] = red >> 8; 345 intel_crtc->lut_g[regno] = green >> 8; 346 intel_crtc->lut_b[regno] = blue >> 8; 347 } 348 349 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 350 u16 *blue, int regno) 351 { 352 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 353 354 *red = intel_crtc->lut_r[regno] << 8; 355 *green = intel_crtc->lut_g[regno] << 8; 356 *blue = intel_crtc->lut_b[regno] << 8; 357 } 358 359 static struct drm_fb_helper_crtc * 360 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) 361 { 362 int i; 363 364 for (i = 0; i < fb_helper->crtc_count; i++) 365 if (fb_helper->crtc_info[i].mode_set.crtc == crtc) 366 return &fb_helper->crtc_info[i]; 367 368 return NULL; 369 } 370 371 /* 372 * Try to read the BIOS display configuration and use it for the initial 373 * fb configuration. 374 * 375 * The BIOS or boot loader will generally create an initial display 376 * configuration for us that includes some set of active pipes and displays. 377 * This routine tries to figure out which pipes and connectors are active 378 * and stuffs them into the crtcs and modes array given to us by the 379 * drm_fb_helper code. 380 * 381 * The overall sequence is: 382 * intel_fbdev_init - from driver load 383 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data 384 * drm_fb_helper_init - build fb helper structs 385 * drm_fb_helper_single_add_all_connectors - more fb helper structs 386 * intel_fbdev_initial_config - apply the config 387 * drm_fb_helper_initial_config - call ->probe then register_framebuffer() 388 * drm_setup_crtcs - build crtc config for fbdev 389 * intel_fb_initial_config - find active connectors etc 390 * drm_fb_helper_single_fb_probe - set up fbdev 391 * intelfb_create - re-use or alloc fb, build out fbdev structs 392 * 393 * Note that we don't make special consideration whether we could actually 394 * switch to the selected modes without a full modeset. E.g. when the display 395 * is in VGA mode we need to recalculate watermarks and set a new high-res 396 * framebuffer anyway. 397 */ 398 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, 399 struct drm_fb_helper_crtc **crtcs, 400 struct drm_display_mode **modes, 401 struct drm_fb_offset *offsets, 402 bool *enabled, int width, int height) 403 { 404 struct drm_device *dev = fb_helper->dev; 405 int i, j; 406 bool *save_enabled; 407 bool fallback = true; 408 int num_connectors_enabled = 0; 409 int num_connectors_detected = 0; 410 uint64_t conn_configured = 0, mask; 411 int pass = 0; 412 413 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), 414 GFP_KERNEL); 415 if (!save_enabled) 416 return false; 417 418 memcpy(save_enabled, enabled, dev->mode_config.num_connector); 419 mask = (1 << fb_helper->connector_count) - 1; 420 retry: 421 for (i = 0; i < fb_helper->connector_count; i++) { 422 struct drm_fb_helper_connector *fb_conn; 423 struct drm_connector *connector; 424 struct drm_encoder *encoder; 425 struct drm_fb_helper_crtc *new_crtc; 426 427 fb_conn = fb_helper->connector_info[i]; 428 connector = fb_conn->connector; 429 430 if (conn_configured & (1 << i)) 431 continue; 432 433 if (pass == 0 && !connector->has_tile) 434 continue; 435 436 if (connector->status == connector_status_connected) 437 num_connectors_detected++; 438 439 if (!enabled[i]) { 440 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 441 connector->name); 442 conn_configured |= (1 << i); 443 continue; 444 } 445 446 if (connector->force == DRM_FORCE_OFF) { 447 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 448 connector->name); 449 enabled[i] = false; 450 continue; 451 } 452 453 encoder = connector->encoder; 454 if (!encoder || WARN_ON(!encoder->crtc)) { 455 if (connector->force > DRM_FORCE_OFF) 456 goto bail; 457 458 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 459 connector->name); 460 enabled[i] = false; 461 conn_configured |= (1 << i); 462 continue; 463 } 464 465 num_connectors_enabled++; 466 467 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc); 468 469 /* 470 * Make sure we're not trying to drive multiple connectors 471 * with a single CRTC, since our cloning support may not 472 * match the BIOS. 473 */ 474 for (j = 0; j < fb_helper->connector_count; j++) { 475 if (crtcs[j] == new_crtc) { 476 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 477 goto bail; 478 } 479 } 480 481 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 482 connector->name); 483 484 /* go for command line mode first */ 485 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); 486 487 /* try for preferred next */ 488 if (!modes[i]) { 489 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", 490 connector->name, connector->has_tile); 491 modes[i] = drm_has_preferred_mode(fb_conn, width, 492 height); 493 } 494 495 /* No preferred mode marked by the EDID? Are there any modes? */ 496 if (!modes[i] && !list_empty(&connector->modes)) { 497 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 498 connector->name); 499 modes[i] = list_first_entry(&connector->modes, 500 struct drm_display_mode, 501 head); 502 } 503 504 /* last resort: use current mode */ 505 if (!modes[i]) { 506 /* 507 * IMPORTANT: We want to use the adjusted mode (i.e. 508 * after the panel fitter upscaling) as the initial 509 * config, not the input mode, which is what crtc->mode 510 * usually contains. But since our current fastboot 511 * code puts a mode derived from the post-pfit timings 512 * into crtc->mode this works out correctly. We don't 513 * use hwmode anywhere right now, so use it for this 514 * since the fb helper layer wants a pointer to 515 * something we own. 516 */ 517 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 518 connector->name); 519 intel_mode_from_pipe_config(&encoder->crtc->hwmode, 520 to_intel_crtc(encoder->crtc)->config); 521 modes[i] = &encoder->crtc->hwmode; 522 } 523 crtcs[i] = new_crtc; 524 525 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n", 526 connector->name, 527 pipe_name(to_intel_crtc(encoder->crtc)->pipe), 528 encoder->crtc->base.id, 529 modes[i]->hdisplay, modes[i]->vdisplay, 530 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 531 532 fallback = false; 533 conn_configured |= (1 << i); 534 } 535 536 if ((conn_configured & mask) != mask) { 537 pass++; 538 goto retry; 539 } 540 541 /* 542 * If the BIOS didn't enable everything it could, fall back to have the 543 * same user experiencing of lighting up as much as possible like the 544 * fbdev helper library. 545 */ 546 if (num_connectors_enabled != num_connectors_detected && 547 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { 548 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 549 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 550 num_connectors_detected); 551 fallback = true; 552 } 553 554 if (fallback) { 555 bail: 556 DRM_DEBUG_KMS("Not using firmware configuration\n"); 557 memcpy(enabled, save_enabled, dev->mode_config.num_connector); 558 kfree(save_enabled); 559 return false; 560 } 561 562 kfree(save_enabled); 563 return true; 564 } 565 566 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 567 .initial_config = intel_fb_initial_config, 568 .gamma_set = intel_crtc_fb_gamma_set, 569 .gamma_get = intel_crtc_fb_gamma_get, 570 .fb_probe = intelfb_create, 571 }; 572 573 static void intel_fbdev_destroy(struct drm_device *dev, 574 struct intel_fbdev *ifbdev) 575 { 576 #if 0 577 if (ifbdev->helper.fbdev) { 578 struct fb_info *info = ifbdev->helper.fbdev; 579 580 unregister_framebuffer(info); 581 iounmap(info->screen_base); 582 if (info->cmap.len) 583 fb_dealloc_cmap(&info->cmap); 584 585 framebuffer_release(info); 586 } 587 #endif 588 589 drm_fb_helper_fini(&ifbdev->helper); 590 591 drm_framebuffer_unregister_private(&ifbdev->fb->base); 592 drm_framebuffer_remove(&ifbdev->fb->base); 593 } 594 595 /* 596 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 597 * The core display code will have read out the current plane configuration, 598 * so we use that to figure out if there's an object for us to use as the 599 * fb, and if so, we re-use it for the fbdev configuration. 600 * 601 * Note we only support a single fb shared across pipes for boot (mostly for 602 * fbcon), so we just find the biggest and use that. 603 */ 604 static bool intel_fbdev_init_bios(struct drm_device *dev, 605 struct intel_fbdev *ifbdev) 606 { 607 struct intel_framebuffer *fb = NULL; 608 struct drm_crtc *crtc; 609 struct intel_crtc *intel_crtc; 610 struct intel_initial_plane_config *plane_config = NULL; 611 unsigned int max_size = 0; 612 613 if (!i915.fastboot) 614 return false; 615 616 /* Find the largest fb */ 617 for_each_crtc(dev, crtc) { 618 intel_crtc = to_intel_crtc(crtc); 619 620 if (!intel_crtc->active || !crtc->primary->fb) { 621 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 622 pipe_name(intel_crtc->pipe)); 623 continue; 624 } 625 626 if (intel_crtc->plane_config.size > max_size) { 627 DRM_DEBUG_KMS("found possible fb from plane %c\n", 628 pipe_name(intel_crtc->pipe)); 629 plane_config = &intel_crtc->plane_config; 630 fb = to_intel_framebuffer(crtc->primary->fb); 631 max_size = plane_config->size; 632 } 633 } 634 635 if (!fb) { 636 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 637 goto out; 638 } 639 640 /* Now make sure all the pipes will fit into it */ 641 for_each_crtc(dev, crtc) { 642 unsigned int cur_size; 643 644 intel_crtc = to_intel_crtc(crtc); 645 646 if (!intel_crtc->active) { 647 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 648 pipe_name(intel_crtc->pipe)); 649 continue; 650 } 651 652 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 653 pipe_name(intel_crtc->pipe)); 654 655 /* 656 * See if the plane fb we found above will fit on this 657 * pipe. Note we need to use the selected fb's pitch and bpp 658 * rather than the current pipe's, since they differ. 659 */ 660 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay; 661 cur_size = cur_size * fb->base.bits_per_pixel / 8; 662 if (fb->base.pitches[0] < cur_size) { 663 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 664 pipe_name(intel_crtc->pipe), 665 cur_size, fb->base.pitches[0]); 666 plane_config = NULL; 667 fb = NULL; 668 break; 669 } 670 671 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay; 672 cur_size = intel_fb_align_height(dev, cur_size, 673 fb->base.pixel_format, 674 fb->base.modifier[0]); 675 cur_size *= fb->base.pitches[0]; 676 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 677 pipe_name(intel_crtc->pipe), 678 intel_crtc->config->base.adjusted_mode.crtc_hdisplay, 679 intel_crtc->config->base.adjusted_mode.crtc_vdisplay, 680 fb->base.bits_per_pixel, 681 cur_size); 682 683 if (cur_size > max_size) { 684 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 685 pipe_name(intel_crtc->pipe), 686 cur_size, max_size); 687 plane_config = NULL; 688 fb = NULL; 689 break; 690 } 691 692 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 693 pipe_name(intel_crtc->pipe), 694 max_size, cur_size); 695 } 696 697 if (!fb) { 698 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 699 goto out; 700 } 701 702 ifbdev->preferred_bpp = fb->base.bits_per_pixel; 703 ifbdev->fb = fb; 704 705 drm_framebuffer_reference(&ifbdev->fb->base); 706 707 /* Final pass to check if any active pipes don't have fbs */ 708 for_each_crtc(dev, crtc) { 709 intel_crtc = to_intel_crtc(crtc); 710 711 if (!intel_crtc->active) 712 continue; 713 714 WARN(!crtc->primary->fb, 715 "re-used BIOS config but lost an fb on crtc %d\n", 716 crtc->base.id); 717 } 718 719 720 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 721 return true; 722 723 out: 724 725 return false; 726 } 727 728 static void intel_fbdev_suspend_worker(struct work_struct *work) 729 { 730 intel_fbdev_set_suspend(container_of(work, 731 struct drm_i915_private, 732 fbdev_suspend_work)->dev, 733 FBINFO_STATE_RUNNING, 734 true); 735 } 736 737 int intel_fbdev_init(struct drm_device *dev) 738 { 739 struct intel_fbdev *ifbdev; 740 struct drm_i915_private *dev_priv = dev->dev_private; 741 int ret; 742 743 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) 744 return -ENODEV; 745 746 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 747 if (ifbdev == NULL) 748 return -ENOMEM; 749 750 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 751 752 if (!intel_fbdev_init_bios(dev, ifbdev)) 753 ifbdev->preferred_bpp = 32; 754 755 ret = drm_fb_helper_init(dev, &ifbdev->helper, 756 INTEL_INFO(dev)->num_pipes, 4); 757 if (ret) { 758 kfree(ifbdev); 759 return ret; 760 } 761 762 dev_priv->fbdev = ifbdev; 763 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 764 765 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 766 767 return 0; 768 } 769 770 void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 771 { 772 struct drm_i915_private *dev_priv = data; 773 struct intel_fbdev *ifbdev = dev_priv->fbdev; 774 775 /* Due to peculiar init order wrt to hpd handling this is separate. */ 776 drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp); 777 } 778 779 void intel_fbdev_fini(struct drm_device *dev) 780 { 781 struct drm_i915_private *dev_priv = dev->dev_private; 782 if (!dev_priv->fbdev) 783 return; 784 785 #if 0 786 flush_work(&dev_priv->fbdev_suspend_work); 787 #endif 788 789 async_synchronize_full(); 790 intel_fbdev_destroy(dev, dev_priv->fbdev); 791 kfree(dev_priv->fbdev); 792 dev_priv->fbdev = NULL; 793 } 794 795 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 796 { 797 #if 0 798 struct drm_i915_private *dev_priv = dev->dev_private; 799 struct intel_fbdev *ifbdev = dev_priv->fbdev; 800 struct fb_info *info; 801 802 if (!ifbdev) 803 return; 804 805 info = ifbdev->helper.fbdev; 806 807 if (synchronous) { 808 /* Flush any pending work to turn the console on, and then 809 * wait to turn it off. It must be synchronous as we are 810 * about to suspend or unload the driver. 811 * 812 * Note that from within the work-handler, we cannot flush 813 * ourselves, so only flush outstanding work upon suspend! 814 */ 815 if (state != FBINFO_STATE_RUNNING) 816 flush_work(&dev_priv->fbdev_suspend_work); 817 console_lock(); 818 } else { 819 /* 820 * The console lock can be pretty contented on resume due 821 * to all the printk activity. Try to keep it out of the hot 822 * path of resume if possible. 823 */ 824 WARN_ON(state != FBINFO_STATE_RUNNING); 825 if (!console_trylock()) { 826 /* Don't block our own workqueue as this can 827 * be run in parallel with other i915.ko tasks. 828 */ 829 schedule_work(&dev_priv->fbdev_suspend_work); 830 return; 831 } 832 } 833 834 /* On resume from hibernation: If the object is shmemfs backed, it has 835 * been restored from swap. If the object is stolen however, it will be 836 * full of whatever garbage was left in there. 837 */ 838 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) 839 memset_io(info->screen_base, 0, info->screen_size); 840 841 fb_set_suspend(info, state); 842 console_unlock(); 843 #endif 844 } 845 846 void intel_fbdev_output_poll_changed(struct drm_device *dev) 847 { 848 struct drm_i915_private *dev_priv = dev->dev_private; 849 if (dev_priv->fbdev) 850 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper); 851 } 852 853 void intel_fbdev_restore_mode(struct drm_device *dev) 854 { 855 int ret; 856 struct drm_i915_private *dev_priv = dev->dev_private; 857 858 if (!dev_priv->fbdev) 859 return; 860 861 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper); 862 if (ret) 863 DRM_DEBUG("failed to restore crtc mode\n"); 864 } 865