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/fb.h> 38#include <linux/init.h> 39#include <linux/vga_switcheroo.h> 40 41#include <drm/drmP.h> 42#include <drm/drm_crtc.h> 43#include <drm/drm_fb_helper.h> 44#include "intel_drv.h" 45#include <drm/i915_drm.h> 46#include "i915_drv.h" 47 48static int intel_fbdev_set_par(struct fb_info *info) 49{ 50 struct drm_fb_helper *fb_helper = info->par; 51 struct intel_fbdev *ifbdev = 52 container_of(fb_helper, struct intel_fbdev, helper); 53 int ret; 54 55 ret = drm_fb_helper_set_par(info); 56 57 if (ret == 0) { 58 /* 59 * FIXME: fbdev presumes that all callbacks also work from 60 * atomic contexts and relies on that for emergency oops 61 * printing. KMS totally doesn't do that and the locking here is 62 * by far not the only place this goes wrong. Ignore this for 63 * now until we solve this for real. 64 */ 65 mutex_lock(&fb_helper->dev->struct_mutex); 66 ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj, 67 true); 68 mutex_unlock(&fb_helper->dev->struct_mutex); 69 } 70 71 return ret; 72} 73 74static int intel_fbdev_blank(int blank, struct fb_info *info) 75{ 76 struct drm_fb_helper *fb_helper = info->par; 77 struct intel_fbdev *ifbdev = 78 container_of(fb_helper, struct intel_fbdev, helper); 79 int ret; 80 81 ret = drm_fb_helper_blank(blank, info); 82 83 if (ret == 0) { 84 /* 85 * FIXME: fbdev presumes that all callbacks also work from 86 * atomic contexts and relies on that for emergency oops 87 * printing. KMS totally doesn't do that and the locking here is 88 * by far not the only place this goes wrong. Ignore this for 89 * now until we solve this for real. 90 */ 91 mutex_lock(&fb_helper->dev->struct_mutex); 92 intel_fb_obj_invalidate(ifbdev->fb->obj, NULL, ORIGIN_GTT); 93 mutex_unlock(&fb_helper->dev->struct_mutex); 94 } 95 96 return ret; 97} 98 99static struct fb_ops intelfb_ops = { 100 .owner = THIS_MODULE, 101 .fb_check_var = drm_fb_helper_check_var, 102 .fb_set_par = intel_fbdev_set_par, 103 .fb_fillrect = cfb_fillrect, 104 .fb_copyarea = cfb_copyarea, 105 .fb_imageblit = cfb_imageblit, 106 .fb_pan_display = drm_fb_helper_pan_display, 107 .fb_blank = intel_fbdev_blank, 108 .fb_setcmap = drm_fb_helper_setcmap, 109 .fb_debug_enter = drm_fb_helper_debug_enter, 110 .fb_debug_leave = drm_fb_helper_debug_leave, 111}; 112 113static int intelfb_alloc(struct drm_fb_helper *helper, 114 struct drm_fb_helper_surface_size *sizes) 115{ 116 struct intel_fbdev *ifbdev = 117 container_of(helper, struct intel_fbdev, helper); 118 struct drm_framebuffer *fb; 119 struct drm_device *dev = helper->dev; 120 struct drm_mode_fb_cmd2 mode_cmd = {}; 121 struct drm_i915_gem_object *obj; 122 int size, ret; 123 124 /* we don't do packed 24bpp */ 125 if (sizes->surface_bpp == 24) 126 sizes->surface_bpp = 32; 127 128 mode_cmd.width = sizes->surface_width; 129 mode_cmd.height = sizes->surface_height; 130 131 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 132 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 133 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 134 sizes->surface_depth); 135 136 size = mode_cmd.pitches[0] * mode_cmd.height; 137 size = PAGE_ALIGN(size); 138 obj = i915_gem_object_create_stolen(dev, size); 139 if (obj == NULL) 140 obj = i915_gem_alloc_object(dev, size); 141 if (!obj) { 142 DRM_ERROR("failed to allocate framebuffer\n"); 143 ret = -ENOMEM; 144 goto out; 145 } 146 147 fb = __intel_framebuffer_create(dev, &mode_cmd, obj); 148 if (IS_ERR(fb)) { 149 ret = PTR_ERR(fb); 150 goto out_unref; 151 } 152 153 /* Flush everything out, we'll be doing GTT only from now on */ 154 ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL, NULL); 155 if (ret) { 156 DRM_ERROR("failed to pin obj: %d\n", ret); 157 goto out_fb; 158 } 159 160 ifbdev->fb = to_intel_framebuffer(fb); 161 162 return 0; 163 164out_fb: 165 drm_framebuffer_remove(fb); 166out_unref: 167 drm_gem_object_unreference(&obj->base); 168out: 169 return ret; 170} 171 172static int intelfb_create(struct drm_fb_helper *helper, 173 struct drm_fb_helper_surface_size *sizes) 174{ 175 struct intel_fbdev *ifbdev = 176 container_of(helper, struct intel_fbdev, helper); 177 struct intel_framebuffer *intel_fb = ifbdev->fb; 178 struct drm_device *dev = helper->dev; 179 struct drm_i915_private *dev_priv = dev->dev_private; 180 struct fb_info *info; 181 struct drm_framebuffer *fb; 182 struct drm_i915_gem_object *obj; 183 int size, ret; 184 bool prealloc = false; 185 186 mutex_lock(&dev->struct_mutex); 187 188 if (intel_fb && 189 (sizes->fb_width > intel_fb->base.width || 190 sizes->fb_height > intel_fb->base.height)) { 191 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 192 " releasing it\n", 193 intel_fb->base.width, intel_fb->base.height, 194 sizes->fb_width, sizes->fb_height); 195 drm_framebuffer_unreference(&intel_fb->base); 196 intel_fb = ifbdev->fb = NULL; 197 } 198 if (!intel_fb || WARN_ON(!intel_fb->obj)) { 199 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 200 ret = intelfb_alloc(helper, sizes); 201 if (ret) 202 goto out_unlock; 203 intel_fb = ifbdev->fb; 204 } else { 205 DRM_DEBUG_KMS("re-using BIOS fb\n"); 206 prealloc = true; 207 sizes->fb_width = intel_fb->base.width; 208 sizes->fb_height = intel_fb->base.height; 209 } 210 211 obj = intel_fb->obj; 212 size = obj->base.size; 213 214 info = framebuffer_alloc(0, &dev->pdev->dev); 215 if (!info) { 216 ret = -ENOMEM; 217 goto out_unpin; 218 } 219 220 info->par = helper; 221 222 fb = &ifbdev->fb->base; 223 224 ifbdev->helper.fb = fb; 225 ifbdev->helper.fbdev = info; 226 227 strcpy(info->fix.id, "inteldrmfb"); 228 229 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 230 info->fbops = &intelfb_ops; 231 232 ret = fb_alloc_cmap(&info->cmap, 256, 0); 233 if (ret) { 234 ret = -ENOMEM; 235 goto out_unpin; 236 } 237 /* setup aperture base/size for vesafb takeover */ 238 info->apertures = alloc_apertures(1); 239 if (!info->apertures) { 240 ret = -ENOMEM; 241 goto out_unpin; 242 } 243 info->apertures->ranges[0].base = dev->mode_config.fb_base; 244 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end; 245 246 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj); 247 info->fix.smem_len = size; 248 249 info->screen_base = 250 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj), 251 size); 252 if (!info->screen_base) { 253 ret = -ENOSPC; 254 goto out_unpin; 255 } 256 info->screen_size = size; 257 258 /* This driver doesn't need a VT switch to restore the mode on resume */ 259 info->skip_vt_switch = true; 260 261 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 262 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 263 264 /* If the object is shmemfs backed, it will have given us zeroed pages. 265 * If the object is stolen however, it will be full of whatever 266 * garbage was left in there. 267 */ 268 if (ifbdev->fb->obj->stolen && !prealloc) 269 memset_io(info->screen_base, 0, info->screen_size); 270 271 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 272 273 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n", 274 fb->width, fb->height, 275 i915_gem_obj_ggtt_offset(obj), obj); 276 277 mutex_unlock(&dev->struct_mutex); 278 vga_switcheroo_client_fb_set(dev->pdev, info); 279 return 0; 280 281out_unpin: 282 i915_gem_object_ggtt_unpin(obj); 283 drm_gem_object_unreference(&obj->base); 284out_unlock: 285 mutex_unlock(&dev->struct_mutex); 286 return ret; 287} 288 289/** Sets the color ramps on behalf of RandR */ 290static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 291 u16 blue, int regno) 292{ 293 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 294 295 intel_crtc->lut_r[regno] = red >> 8; 296 intel_crtc->lut_g[regno] = green >> 8; 297 intel_crtc->lut_b[regno] = blue >> 8; 298} 299 300static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 301 u16 *blue, int regno) 302{ 303 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 304 305 *red = intel_crtc->lut_r[regno] << 8; 306 *green = intel_crtc->lut_g[regno] << 8; 307 *blue = intel_crtc->lut_b[regno] << 8; 308} 309 310static struct drm_fb_helper_crtc * 311intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) 312{ 313 int i; 314 315 for (i = 0; i < fb_helper->crtc_count; i++) 316 if (fb_helper->crtc_info[i].mode_set.crtc == crtc) 317 return &fb_helper->crtc_info[i]; 318 319 return NULL; 320} 321 322/* 323 * Try to read the BIOS display configuration and use it for the initial 324 * fb configuration. 325 * 326 * The BIOS or boot loader will generally create an initial display 327 * configuration for us that includes some set of active pipes and displays. 328 * This routine tries to figure out which pipes and connectors are active 329 * and stuffs them into the crtcs and modes array given to us by the 330 * drm_fb_helper code. 331 * 332 * The overall sequence is: 333 * intel_fbdev_init - from driver load 334 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data 335 * drm_fb_helper_init - build fb helper structs 336 * drm_fb_helper_single_add_all_connectors - more fb helper structs 337 * intel_fbdev_initial_config - apply the config 338 * drm_fb_helper_initial_config - call ->probe then register_framebuffer() 339 * drm_setup_crtcs - build crtc config for fbdev 340 * intel_fb_initial_config - find active connectors etc 341 * drm_fb_helper_single_fb_probe - set up fbdev 342 * intelfb_create - re-use or alloc fb, build out fbdev structs 343 * 344 * Note that we don't make special consideration whether we could actually 345 * switch to the selected modes without a full modeset. E.g. when the display 346 * is in VGA mode we need to recalculate watermarks and set a new high-res 347 * framebuffer anyway. 348 */ 349static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, 350 struct drm_fb_helper_crtc **crtcs, 351 struct drm_display_mode **modes, 352 struct drm_fb_offset *offsets, 353 bool *enabled, int width, int height) 354{ 355 struct drm_device *dev = fb_helper->dev; 356 int i, j; 357 bool *save_enabled; 358 bool fallback = true; 359 int num_connectors_enabled = 0; 360 int num_connectors_detected = 0; 361 uint64_t conn_configured = 0, mask; 362 int pass = 0; 363 364 save_enabled = kcalloc(fb_helper->connector_count, sizeof(bool), 365 GFP_KERNEL); 366 if (!save_enabled) 367 return false; 368 369 memcpy(save_enabled, enabled, fb_helper->connector_count); 370 mask = (1 << fb_helper->connector_count) - 1; 371retry: 372 for (i = 0; i < fb_helper->connector_count; i++) { 373 struct drm_fb_helper_connector *fb_conn; 374 struct drm_connector *connector; 375 struct drm_encoder *encoder; 376 struct drm_fb_helper_crtc *new_crtc; 377 378 fb_conn = fb_helper->connector_info[i]; 379 connector = fb_conn->connector; 380 381 if (conn_configured & (1 << i)) 382 continue; 383 384 if (pass == 0 && !connector->has_tile) 385 continue; 386 387 if (connector->status == connector_status_connected) 388 num_connectors_detected++; 389 390 if (!enabled[i]) { 391 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 392 connector->name); 393 conn_configured |= (1 << i); 394 continue; 395 } 396 397 if (connector->force == DRM_FORCE_OFF) { 398 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 399 connector->name); 400 enabled[i] = false; 401 continue; 402 } 403 404 encoder = connector->encoder; 405 if (!encoder || WARN_ON(!encoder->crtc)) { 406 if (connector->force > DRM_FORCE_OFF) 407 goto bail; 408 409 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 410 connector->name); 411 enabled[i] = false; 412 conn_configured |= (1 << i); 413 continue; 414 } 415 416 num_connectors_enabled++; 417 418 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc); 419 420 /* 421 * Make sure we're not trying to drive multiple connectors 422 * with a single CRTC, since our cloning support may not 423 * match the BIOS. 424 */ 425 for (j = 0; j < fb_helper->connector_count; j++) { 426 if (crtcs[j] == new_crtc) { 427 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 428 goto bail; 429 } 430 } 431 432 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 433 connector->name); 434 435 /* go for command line mode first */ 436 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); 437 438 /* try for preferred next */ 439 if (!modes[i]) { 440 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", 441 connector->name, connector->has_tile); 442 modes[i] = drm_has_preferred_mode(fb_conn, width, 443 height); 444 } 445 446 /* No preferred mode marked by the EDID? Are there any modes? */ 447 if (!modes[i] && !list_empty(&connector->modes)) { 448 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 449 connector->name); 450 modes[i] = list_first_entry(&connector->modes, 451 struct drm_display_mode, 452 head); 453 } 454 455 /* last resort: use current mode */ 456 if (!modes[i]) { 457 /* 458 * IMPORTANT: We want to use the adjusted mode (i.e. 459 * after the panel fitter upscaling) as the initial 460 * config, not the input mode, which is what crtc->mode 461 * usually contains. But since our current fastboot 462 * code puts a mode derived from the post-pfit timings 463 * into crtc->mode this works out correctly. We don't 464 * use hwmode anywhere right now, so use it for this 465 * since the fb helper layer wants a pointer to 466 * something we own. 467 */ 468 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 469 connector->name); 470 intel_mode_from_pipe_config(&encoder->crtc->hwmode, 471 to_intel_crtc(encoder->crtc)->config); 472 modes[i] = &encoder->crtc->hwmode; 473 } 474 crtcs[i] = new_crtc; 475 476 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n", 477 connector->name, 478 pipe_name(to_intel_crtc(encoder->crtc)->pipe), 479 encoder->crtc->base.id, 480 modes[i]->hdisplay, modes[i]->vdisplay, 481 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 482 483 fallback = false; 484 conn_configured |= (1 << i); 485 } 486 487 if ((conn_configured & mask) != mask) { 488 pass++; 489 goto retry; 490 } 491 492 /* 493 * If the BIOS didn't enable everything it could, fall back to have the 494 * same user experiencing of lighting up as much as possible like the 495 * fbdev helper library. 496 */ 497 if (num_connectors_enabled != num_connectors_detected && 498 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { 499 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 500 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 501 num_connectors_detected); 502 fallback = true; 503 } 504 505 if (fallback) { 506bail: 507 DRM_DEBUG_KMS("Not using firmware configuration\n"); 508 memcpy(enabled, save_enabled, fb_helper->connector_count); 509 kfree(save_enabled); 510 return false; 511 } 512 513 kfree(save_enabled); 514 return true; 515} 516 517static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 518 .initial_config = intel_fb_initial_config, 519 .gamma_set = intel_crtc_fb_gamma_set, 520 .gamma_get = intel_crtc_fb_gamma_get, 521 .fb_probe = intelfb_create, 522}; 523 524static void intel_fbdev_destroy(struct drm_device *dev, 525 struct intel_fbdev *ifbdev) 526{ 527 if (ifbdev->helper.fbdev) { 528 struct fb_info *info = ifbdev->helper.fbdev; 529 530 unregister_framebuffer(info); 531 iounmap(info->screen_base); 532 if (info->cmap.len) 533 fb_dealloc_cmap(&info->cmap); 534 535 framebuffer_release(info); 536 } 537 538 drm_fb_helper_fini(&ifbdev->helper); 539 540 drm_framebuffer_unregister_private(&ifbdev->fb->base); 541 drm_framebuffer_remove(&ifbdev->fb->base); 542} 543 544/* 545 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 546 * The core display code will have read out the current plane configuration, 547 * so we use that to figure out if there's an object for us to use as the 548 * fb, and if so, we re-use it for the fbdev configuration. 549 * 550 * Note we only support a single fb shared across pipes for boot (mostly for 551 * fbcon), so we just find the biggest and use that. 552 */ 553static bool intel_fbdev_init_bios(struct drm_device *dev, 554 struct intel_fbdev *ifbdev) 555{ 556 struct intel_framebuffer *fb = NULL; 557 struct drm_crtc *crtc; 558 struct intel_crtc *intel_crtc; 559 struct intel_initial_plane_config *plane_config = NULL; 560 unsigned int max_size = 0; 561 562 if (!i915.fastboot) 563 return false; 564 565 /* Find the largest fb */ 566 for_each_crtc(dev, crtc) { 567 intel_crtc = to_intel_crtc(crtc); 568 569 if (!intel_crtc->active || !crtc->primary->fb) { 570 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 571 pipe_name(intel_crtc->pipe)); 572 continue; 573 } 574 575 if (intel_crtc->plane_config.size > max_size) { 576 DRM_DEBUG_KMS("found possible fb from plane %c\n", 577 pipe_name(intel_crtc->pipe)); 578 plane_config = &intel_crtc->plane_config; 579 fb = to_intel_framebuffer(crtc->primary->fb); 580 max_size = plane_config->size; 581 } 582 } 583 584 if (!fb) { 585 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 586 goto out; 587 } 588 589 /* Now make sure all the pipes will fit into it */ 590 for_each_crtc(dev, crtc) { 591 unsigned int cur_size; 592 593 intel_crtc = to_intel_crtc(crtc); 594 595 if (!intel_crtc->active) { 596 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 597 pipe_name(intel_crtc->pipe)); 598 continue; 599 } 600 601 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 602 pipe_name(intel_crtc->pipe)); 603 604 /* 605 * See if the plane fb we found above will fit on this 606 * pipe. Note we need to use the selected fb's pitch and bpp 607 * rather than the current pipe's, since they differ. 608 */ 609 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay; 610 cur_size = cur_size * fb->base.bits_per_pixel / 8; 611 if (fb->base.pitches[0] < cur_size) { 612 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 613 pipe_name(intel_crtc->pipe), 614 cur_size, fb->base.pitches[0]); 615 plane_config = NULL; 616 fb = NULL; 617 break; 618 } 619 620 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay; 621 cur_size = intel_fb_align_height(dev, cur_size, 622 fb->base.pixel_format, 623 fb->base.modifier[0]); 624 cur_size *= fb->base.pitches[0]; 625 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 626 pipe_name(intel_crtc->pipe), 627 intel_crtc->config->base.adjusted_mode.crtc_hdisplay, 628 intel_crtc->config->base.adjusted_mode.crtc_vdisplay, 629 fb->base.bits_per_pixel, 630 cur_size); 631 632 if (cur_size > max_size) { 633 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 634 pipe_name(intel_crtc->pipe), 635 cur_size, max_size); 636 plane_config = NULL; 637 fb = NULL; 638 break; 639 } 640 641 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 642 pipe_name(intel_crtc->pipe), 643 max_size, cur_size); 644 } 645 646 if (!fb) { 647 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 648 goto out; 649 } 650 651 ifbdev->preferred_bpp = fb->base.bits_per_pixel; 652 ifbdev->fb = fb; 653 654 drm_framebuffer_reference(&ifbdev->fb->base); 655 656 /* Final pass to check if any active pipes don't have fbs */ 657 for_each_crtc(dev, crtc) { 658 intel_crtc = to_intel_crtc(crtc); 659 660 if (!intel_crtc->active) 661 continue; 662 663 WARN(!crtc->primary->fb, 664 "re-used BIOS config but lost an fb on crtc %d\n", 665 crtc->base.id); 666 } 667 668 669 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 670 return true; 671 672out: 673 674 return false; 675} 676 677static void intel_fbdev_suspend_worker(struct work_struct *work) 678{ 679 intel_fbdev_set_suspend(container_of(work, 680 struct drm_i915_private, 681 fbdev_suspend_work)->dev, 682 FBINFO_STATE_RUNNING, 683 true); 684} 685 686int intel_fbdev_init(struct drm_device *dev) 687{ 688 struct intel_fbdev *ifbdev; 689 struct drm_i915_private *dev_priv = dev->dev_private; 690 int ret; 691 692 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) 693 return -ENODEV; 694 695 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 696 if (ifbdev == NULL) 697 return -ENOMEM; 698 699 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 700 701 if (!intel_fbdev_init_bios(dev, ifbdev)) 702 ifbdev->preferred_bpp = 32; 703 704 ret = drm_fb_helper_init(dev, &ifbdev->helper, 705 INTEL_INFO(dev)->num_pipes, 4); 706 if (ret) { 707 kfree(ifbdev); 708 return ret; 709 } 710 711 dev_priv->fbdev = ifbdev; 712 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 713 714 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 715 716 return 0; 717} 718 719void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 720{ 721 struct drm_i915_private *dev_priv = data; 722 struct intel_fbdev *ifbdev = dev_priv->fbdev; 723 724 /* Due to peculiar init order wrt to hpd handling this is separate. */ 725 drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp); 726} 727 728void intel_fbdev_fini(struct drm_device *dev) 729{ 730 struct drm_i915_private *dev_priv = dev->dev_private; 731 if (!dev_priv->fbdev) 732 return; 733 734 flush_work(&dev_priv->fbdev_suspend_work); 735 736 async_synchronize_full(); 737 intel_fbdev_destroy(dev, dev_priv->fbdev); 738 kfree(dev_priv->fbdev); 739 dev_priv->fbdev = NULL; 740} 741 742void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 743{ 744 struct drm_i915_private *dev_priv = dev->dev_private; 745 struct intel_fbdev *ifbdev = dev_priv->fbdev; 746 struct fb_info *info; 747 748 if (!ifbdev) 749 return; 750 751 info = ifbdev->helper.fbdev; 752 753 if (synchronous) { 754 /* Flush any pending work to turn the console on, and then 755 * wait to turn it off. It must be synchronous as we are 756 * about to suspend or unload the driver. 757 * 758 * Note that from within the work-handler, we cannot flush 759 * ourselves, so only flush outstanding work upon suspend! 760 */ 761 if (state != FBINFO_STATE_RUNNING) 762 flush_work(&dev_priv->fbdev_suspend_work); 763 console_lock(); 764 } else { 765 /* 766 * The console lock can be pretty contented on resume due 767 * to all the printk activity. Try to keep it out of the hot 768 * path of resume if possible. 769 */ 770 WARN_ON(state != FBINFO_STATE_RUNNING); 771 if (!console_trylock()) { 772 /* Don't block our own workqueue as this can 773 * be run in parallel with other i915.ko tasks. 774 */ 775 schedule_work(&dev_priv->fbdev_suspend_work); 776 return; 777 } 778 } 779 780 /* On resume from hibernation: If the object is shmemfs backed, it has 781 * been restored from swap. If the object is stolen however, it will be 782 * full of whatever garbage was left in there. 783 */ 784 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) 785 memset_io(info->screen_base, 0, info->screen_size); 786 787 fb_set_suspend(info, state); 788 console_unlock(); 789} 790 791void intel_fbdev_output_poll_changed(struct drm_device *dev) 792{ 793 struct drm_i915_private *dev_priv = dev->dev_private; 794 if (dev_priv->fbdev) 795 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper); 796} 797 798void intel_fbdev_restore_mode(struct drm_device *dev) 799{ 800 int ret; 801 struct drm_i915_private *dev_priv = dev->dev_private; 802 803 if (!dev_priv->fbdev) 804 return; 805 806 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper); 807 if (ret) 808 DRM_DEBUG("failed to restore crtc mode\n"); 809} 810