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 struct fb_ops intelfb_ops = { 75 .owner = THIS_MODULE, 76 .fb_check_var = drm_fb_helper_check_var, 77 .fb_set_par = intel_fbdev_set_par, 78 .fb_fillrect = cfb_fillrect, 79 .fb_copyarea = cfb_copyarea, 80 .fb_imageblit = cfb_imageblit, 81 .fb_pan_display = drm_fb_helper_pan_display, 82 .fb_blank = drm_fb_helper_blank, 83 .fb_setcmap = drm_fb_helper_setcmap, 84 .fb_debug_enter = drm_fb_helper_debug_enter, 85 .fb_debug_leave = drm_fb_helper_debug_leave, 86}; 87 88static int intelfb_alloc(struct drm_fb_helper *helper, 89 struct drm_fb_helper_surface_size *sizes) 90{ 91 struct intel_fbdev *ifbdev = 92 container_of(helper, struct intel_fbdev, helper); 93 struct drm_framebuffer *fb; 94 struct drm_device *dev = helper->dev; 95 struct drm_mode_fb_cmd2 mode_cmd = {}; 96 struct drm_i915_gem_object *obj; 97 int size, ret; 98 99 /* we don't do packed 24bpp */ 100 if (sizes->surface_bpp == 24) 101 sizes->surface_bpp = 32; 102 103 mode_cmd.width = sizes->surface_width; 104 mode_cmd.height = sizes->surface_height; 105 106 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 107 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 108 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 109 sizes->surface_depth); 110 111 size = mode_cmd.pitches[0] * mode_cmd.height; 112 size = PAGE_ALIGN(size); 113 obj = i915_gem_object_create_stolen(dev, size); 114 if (obj == NULL) 115 obj = i915_gem_alloc_object(dev, size); 116 if (!obj) { 117 DRM_ERROR("failed to allocate framebuffer\n"); 118 ret = -ENOMEM; 119 goto out; 120 } 121 122 /* Flush everything out, we'll be doing GTT only from now on */ 123 ret = intel_pin_and_fence_fb_obj(dev, obj, NULL); 124 if (ret) { 125 DRM_ERROR("failed to pin obj: %d\n", ret); 126 goto out_unref; 127 } 128 129 fb = __intel_framebuffer_create(dev, &mode_cmd, obj); 130 if (IS_ERR(fb)) { 131 ret = PTR_ERR(fb); 132 goto out_unpin; 133 } 134 135 ifbdev->fb = to_intel_framebuffer(fb); 136 137 return 0; 138 139out_unpin: 140 i915_gem_object_ggtt_unpin(obj); 141out_unref: 142 drm_gem_object_unreference(&obj->base); 143out: 144 return ret; 145} 146 147static int intelfb_create(struct drm_fb_helper *helper, 148 struct drm_fb_helper_surface_size *sizes) 149{ 150 struct intel_fbdev *ifbdev = 151 container_of(helper, struct intel_fbdev, helper); 152 struct intel_framebuffer *intel_fb = ifbdev->fb; 153 struct drm_device *dev = helper->dev; 154 struct drm_i915_private *dev_priv = dev->dev_private; 155 struct fb_info *info; 156 struct drm_framebuffer *fb; 157 struct drm_i915_gem_object *obj; 158 int size, ret; 159 bool prealloc = false; 160 161 mutex_lock(&dev->struct_mutex); 162 163 if (intel_fb && 164 (sizes->fb_width > intel_fb->base.width || 165 sizes->fb_height > intel_fb->base.height)) { 166 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 167 " releasing it\n", 168 intel_fb->base.width, intel_fb->base.height, 169 sizes->fb_width, sizes->fb_height); 170 drm_framebuffer_unreference(&intel_fb->base); 171 intel_fb = ifbdev->fb = NULL; 172 } 173 if (!intel_fb || WARN_ON(!intel_fb->obj)) { 174 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 175 ret = intelfb_alloc(helper, sizes); 176 if (ret) 177 goto out_unlock; 178 intel_fb = ifbdev->fb; 179 } else { 180 DRM_DEBUG_KMS("re-using BIOS fb\n"); 181 prealloc = true; 182 sizes->fb_width = intel_fb->base.width; 183 sizes->fb_height = intel_fb->base.height; 184 } 185 186 obj = intel_fb->obj; 187 size = obj->base.size; 188 189 info = framebuffer_alloc(0, &dev->pdev->dev); 190 if (!info) { 191 ret = -ENOMEM; 192 goto out_unpin; 193 } 194 195 info->par = helper; 196 197 fb = &ifbdev->fb->base; 198 199 ifbdev->helper.fb = fb; 200 ifbdev->helper.fbdev = info; 201 202 strcpy(info->fix.id, "inteldrmfb"); 203 204 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 205 info->fbops = &intelfb_ops; 206 207 ret = fb_alloc_cmap(&info->cmap, 256, 0); 208 if (ret) { 209 ret = -ENOMEM; 210 goto out_unpin; 211 } 212 /* setup aperture base/size for vesafb takeover */ 213 info->apertures = alloc_apertures(1); 214 if (!info->apertures) { 215 ret = -ENOMEM; 216 goto out_unpin; 217 } 218 info->apertures->ranges[0].base = dev->mode_config.fb_base; 219 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end; 220 221 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj); 222 info->fix.smem_len = size; 223 224 info->screen_base = 225 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj), 226 size); 227 if (!info->screen_base) { 228 ret = -ENOSPC; 229 goto out_unpin; 230 } 231 info->screen_size = size; 232 233 /* This driver doesn't need a VT switch to restore the mode on resume */ 234 info->skip_vt_switch = true; 235 236 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 237 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 238 239 /* If the object is shmemfs backed, it will have given us zeroed pages. 240 * If the object is stolen however, it will be full of whatever 241 * garbage was left in there. 242 */ 243 if (ifbdev->fb->obj->stolen && !prealloc) 244 memset_io(info->screen_base, 0, info->screen_size); 245 246 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 247 248 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n", 249 fb->width, fb->height, 250 i915_gem_obj_ggtt_offset(obj), obj); 251 252 mutex_unlock(&dev->struct_mutex); 253 vga_switcheroo_client_fb_set(dev->pdev, info); 254 return 0; 255 256out_unpin: 257 i915_gem_object_ggtt_unpin(obj); 258 drm_gem_object_unreference(&obj->base); 259out_unlock: 260 mutex_unlock(&dev->struct_mutex); 261 return ret; 262} 263 264/** Sets the color ramps on behalf of RandR */ 265static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 266 u16 blue, int regno) 267{ 268 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 269 270 intel_crtc->lut_r[regno] = red >> 8; 271 intel_crtc->lut_g[regno] = green >> 8; 272 intel_crtc->lut_b[regno] = blue >> 8; 273} 274 275static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 276 u16 *blue, int regno) 277{ 278 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 279 280 *red = intel_crtc->lut_r[regno] << 8; 281 *green = intel_crtc->lut_g[regno] << 8; 282 *blue = intel_crtc->lut_b[regno] << 8; 283} 284 285static struct drm_fb_helper_crtc * 286intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) 287{ 288 int i; 289 290 for (i = 0; i < fb_helper->crtc_count; i++) 291 if (fb_helper->crtc_info[i].mode_set.crtc == crtc) 292 return &fb_helper->crtc_info[i]; 293 294 return NULL; 295} 296 297/* 298 * Try to read the BIOS display configuration and use it for the initial 299 * fb configuration. 300 * 301 * The BIOS or boot loader will generally create an initial display 302 * configuration for us that includes some set of active pipes and displays. 303 * This routine tries to figure out which pipes and connectors are active 304 * and stuffs them into the crtcs and modes array given to us by the 305 * drm_fb_helper code. 306 * 307 * The overall sequence is: 308 * intel_fbdev_init - from driver load 309 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data 310 * drm_fb_helper_init - build fb helper structs 311 * drm_fb_helper_single_add_all_connectors - more fb helper structs 312 * intel_fbdev_initial_config - apply the config 313 * drm_fb_helper_initial_config - call ->probe then register_framebuffer() 314 * drm_setup_crtcs - build crtc config for fbdev 315 * intel_fb_initial_config - find active connectors etc 316 * drm_fb_helper_single_fb_probe - set up fbdev 317 * intelfb_create - re-use or alloc fb, build out fbdev structs 318 * 319 * Note that we don't make special consideration whether we could actually 320 * switch to the selected modes without a full modeset. E.g. when the display 321 * is in VGA mode we need to recalculate watermarks and set a new high-res 322 * framebuffer anyway. 323 */ 324static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, 325 struct drm_fb_helper_crtc **crtcs, 326 struct drm_display_mode **modes, 327 bool *enabled, int width, int height) 328{ 329 struct drm_device *dev = fb_helper->dev; 330 int i, j; 331 bool *save_enabled; 332 bool fallback = true; 333 int num_connectors_enabled = 0; 334 int num_connectors_detected = 0; 335 336 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), 337 GFP_KERNEL); 338 if (!save_enabled) 339 return false; 340 341 memcpy(save_enabled, enabled, dev->mode_config.num_connector); 342 343 for (i = 0; i < fb_helper->connector_count; i++) { 344 struct drm_fb_helper_connector *fb_conn; 345 struct drm_connector *connector; 346 struct drm_encoder *encoder; 347 struct drm_fb_helper_crtc *new_crtc; 348 349 fb_conn = fb_helper->connector_info[i]; 350 connector = fb_conn->connector; 351 352 if (connector->status == connector_status_connected) 353 num_connectors_detected++; 354 355 if (!enabled[i]) { 356 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 357 connector->name); 358 continue; 359 } 360 361 if (connector->force == DRM_FORCE_OFF) { 362 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 363 connector->name); 364 enabled[i] = false; 365 continue; 366 } 367 368 encoder = connector->encoder; 369 if (!encoder || WARN_ON(!encoder->crtc)) { 370 if (connector->force > DRM_FORCE_OFF) 371 goto bail; 372 373 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 374 connector->name); 375 enabled[i] = false; 376 continue; 377 } 378 379 num_connectors_enabled++; 380 381 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc); 382 383 /* 384 * Make sure we're not trying to drive multiple connectors 385 * with a single CRTC, since our cloning support may not 386 * match the BIOS. 387 */ 388 for (j = 0; j < fb_helper->connector_count; j++) { 389 if (crtcs[j] == new_crtc) { 390 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 391 goto bail; 392 } 393 } 394 395 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 396 connector->name); 397 398 /* go for command line mode first */ 399 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); 400 401 /* try for preferred next */ 402 if (!modes[i]) { 403 DRM_DEBUG_KMS("looking for preferred mode on connector %s\n", 404 connector->name); 405 modes[i] = drm_has_preferred_mode(fb_conn, width, 406 height); 407 } 408 409 /* No preferred mode marked by the EDID? Are there any modes? */ 410 if (!modes[i] && !list_empty(&connector->modes)) { 411 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 412 connector->name); 413 modes[i] = list_first_entry(&connector->modes, 414 struct drm_display_mode, 415 head); 416 } 417 418 /* last resort: use current mode */ 419 if (!modes[i]) { 420 /* 421 * IMPORTANT: We want to use the adjusted mode (i.e. 422 * after the panel fitter upscaling) as the initial 423 * config, not the input mode, which is what crtc->mode 424 * usually contains. But since our current fastboot 425 * code puts a mode derived from the post-pfit timings 426 * into crtc->mode this works out correctly. We don't 427 * use hwmode anywhere right now, so use it for this 428 * since the fb helper layer wants a pointer to 429 * something we own. 430 */ 431 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 432 connector->name); 433 intel_mode_from_pipe_config(&encoder->crtc->hwmode, 434 &to_intel_crtc(encoder->crtc)->config); 435 modes[i] = &encoder->crtc->hwmode; 436 } 437 crtcs[i] = new_crtc; 438 439 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n", 440 connector->name, 441 pipe_name(to_intel_crtc(encoder->crtc)->pipe), 442 encoder->crtc->base.id, 443 modes[i]->hdisplay, modes[i]->vdisplay, 444 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 445 446 fallback = false; 447 } 448 449 /* 450 * If the BIOS didn't enable everything it could, fall back to have the 451 * same user experiencing of lighting up as much as possible like the 452 * fbdev helper library. 453 */ 454 if (num_connectors_enabled != num_connectors_detected && 455 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { 456 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 457 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 458 num_connectors_detected); 459 fallback = true; 460 } 461 462 if (fallback) { 463bail: 464 DRM_DEBUG_KMS("Not using firmware configuration\n"); 465 memcpy(enabled, save_enabled, dev->mode_config.num_connector); 466 kfree(save_enabled); 467 return false; 468 } 469 470 kfree(save_enabled); 471 return true; 472} 473 474static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 475 .initial_config = intel_fb_initial_config, 476 .gamma_set = intel_crtc_fb_gamma_set, 477 .gamma_get = intel_crtc_fb_gamma_get, 478 .fb_probe = intelfb_create, 479}; 480 481static void intel_fbdev_destroy(struct drm_device *dev, 482 struct intel_fbdev *ifbdev) 483{ 484 if (ifbdev->helper.fbdev) { 485 struct fb_info *info = ifbdev->helper.fbdev; 486 487 unregister_framebuffer(info); 488 iounmap(info->screen_base); 489 if (info->cmap.len) 490 fb_dealloc_cmap(&info->cmap); 491 492 framebuffer_release(info); 493 } 494 495 drm_fb_helper_fini(&ifbdev->helper); 496 497 drm_framebuffer_unregister_private(&ifbdev->fb->base); 498 drm_framebuffer_remove(&ifbdev->fb->base); 499} 500 501/* 502 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 503 * The core display code will have read out the current plane configuration, 504 * so we use that to figure out if there's an object for us to use as the 505 * fb, and if so, we re-use it for the fbdev configuration. 506 * 507 * Note we only support a single fb shared across pipes for boot (mostly for 508 * fbcon), so we just find the biggest and use that. 509 */ 510static bool intel_fbdev_init_bios(struct drm_device *dev, 511 struct intel_fbdev *ifbdev) 512{ 513 struct intel_framebuffer *fb = NULL; 514 struct drm_crtc *crtc; 515 struct intel_crtc *intel_crtc; 516 struct intel_plane_config *plane_config = NULL; 517 unsigned int max_size = 0; 518 519 if (!i915.fastboot) 520 return false; 521 522 /* Find the largest fb */ 523 for_each_crtc(dev, crtc) { 524 intel_crtc = to_intel_crtc(crtc); 525 526 if (!intel_crtc->active || !crtc->primary->fb) { 527 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 528 pipe_name(intel_crtc->pipe)); 529 continue; 530 } 531 532 if (intel_crtc->plane_config.size > max_size) { 533 DRM_DEBUG_KMS("found possible fb from plane %c\n", 534 pipe_name(intel_crtc->pipe)); 535 plane_config = &intel_crtc->plane_config; 536 fb = to_intel_framebuffer(crtc->primary->fb); 537 max_size = plane_config->size; 538 } 539 } 540 541 if (!fb) { 542 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 543 goto out; 544 } 545 546 /* Now make sure all the pipes will fit into it */ 547 for_each_crtc(dev, crtc) { 548 unsigned int cur_size; 549 550 intel_crtc = to_intel_crtc(crtc); 551 552 if (!intel_crtc->active) { 553 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 554 pipe_name(intel_crtc->pipe)); 555 continue; 556 } 557 558 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 559 pipe_name(intel_crtc->pipe)); 560 561 /* 562 * See if the plane fb we found above will fit on this 563 * pipe. Note we need to use the selected fb's pitch and bpp 564 * rather than the current pipe's, since they differ. 565 */ 566 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay; 567 cur_size = cur_size * fb->base.bits_per_pixel / 8; 568 if (fb->base.pitches[0] < cur_size) { 569 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 570 pipe_name(intel_crtc->pipe), 571 cur_size, fb->base.pitches[0]); 572 plane_config = NULL; 573 fb = NULL; 574 break; 575 } 576 577 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay; 578 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1); 579 cur_size *= fb->base.pitches[0]; 580 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 581 pipe_name(intel_crtc->pipe), 582 intel_crtc->config.adjusted_mode.crtc_hdisplay, 583 intel_crtc->config.adjusted_mode.crtc_vdisplay, 584 fb->base.bits_per_pixel, 585 cur_size); 586 587 if (cur_size > max_size) { 588 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 589 pipe_name(intel_crtc->pipe), 590 cur_size, max_size); 591 plane_config = NULL; 592 fb = NULL; 593 break; 594 } 595 596 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 597 pipe_name(intel_crtc->pipe), 598 max_size, cur_size); 599 } 600 601 if (!fb) { 602 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 603 goto out; 604 } 605 606 ifbdev->preferred_bpp = fb->base.bits_per_pixel; 607 ifbdev->fb = fb; 608 609 drm_framebuffer_reference(&ifbdev->fb->base); 610 611 /* Final pass to check if any active pipes don't have fbs */ 612 for_each_crtc(dev, crtc) { 613 intel_crtc = to_intel_crtc(crtc); 614 615 if (!intel_crtc->active) 616 continue; 617 618 WARN(!crtc->primary->fb, 619 "re-used BIOS config but lost an fb on crtc %d\n", 620 crtc->base.id); 621 } 622 623 624 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 625 return true; 626 627out: 628 629 return false; 630} 631 632static void intel_fbdev_suspend_worker(struct work_struct *work) 633{ 634 intel_fbdev_set_suspend(container_of(work, 635 struct drm_i915_private, 636 fbdev_suspend_work)->dev, 637 FBINFO_STATE_RUNNING, 638 true); 639} 640 641int intel_fbdev_init(struct drm_device *dev) 642{ 643 struct intel_fbdev *ifbdev; 644 struct drm_i915_private *dev_priv = dev->dev_private; 645 int ret; 646 647 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) 648 return -ENODEV; 649 650 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 651 if (ifbdev == NULL) 652 return -ENOMEM; 653 654 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 655 656 if (!intel_fbdev_init_bios(dev, ifbdev)) 657 ifbdev->preferred_bpp = 32; 658 659 ret = drm_fb_helper_init(dev, &ifbdev->helper, 660 INTEL_INFO(dev)->num_pipes, 4); 661 if (ret) { 662 kfree(ifbdev); 663 return ret; 664 } 665 666 dev_priv->fbdev = ifbdev; 667 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 668 669 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 670 671 return 0; 672} 673 674void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 675{ 676 struct drm_i915_private *dev_priv = data; 677 struct intel_fbdev *ifbdev = dev_priv->fbdev; 678 679 /* Due to peculiar init order wrt to hpd handling this is separate. */ 680 drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp); 681} 682 683void intel_fbdev_fini(struct drm_device *dev) 684{ 685 struct drm_i915_private *dev_priv = dev->dev_private; 686 if (!dev_priv->fbdev) 687 return; 688 689 flush_work(&dev_priv->fbdev_suspend_work); 690 691 async_synchronize_full(); 692 intel_fbdev_destroy(dev, dev_priv->fbdev); 693 kfree(dev_priv->fbdev); 694 dev_priv->fbdev = NULL; 695} 696 697void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 698{ 699 struct drm_i915_private *dev_priv = dev->dev_private; 700 struct intel_fbdev *ifbdev = dev_priv->fbdev; 701 struct fb_info *info; 702 703 if (!ifbdev) 704 return; 705 706 info = ifbdev->helper.fbdev; 707 708 if (synchronous) { 709 /* Flush any pending work to turn the console on, and then 710 * wait to turn it off. It must be synchronous as we are 711 * about to suspend or unload the driver. 712 * 713 * Note that from within the work-handler, we cannot flush 714 * ourselves, so only flush outstanding work upon suspend! 715 */ 716 if (state != FBINFO_STATE_RUNNING) 717 flush_work(&dev_priv->fbdev_suspend_work); 718 console_lock(); 719 } else { 720 /* 721 * The console lock can be pretty contented on resume due 722 * to all the printk activity. Try to keep it out of the hot 723 * path of resume if possible. 724 */ 725 WARN_ON(state != FBINFO_STATE_RUNNING); 726 if (!console_trylock()) { 727 /* Don't block our own workqueue as this can 728 * be run in parallel with other i915.ko tasks. 729 */ 730 schedule_work(&dev_priv->fbdev_suspend_work); 731 return; 732 } 733 } 734 735 /* On resume from hibernation: If the object is shmemfs backed, it has 736 * been restored from swap. If the object is stolen however, it will be 737 * full of whatever garbage was left in there. 738 */ 739 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) 740 memset_io(info->screen_base, 0, info->screen_size); 741 742 fb_set_suspend(info, state); 743 console_unlock(); 744} 745 746void intel_fbdev_output_poll_changed(struct drm_device *dev) 747{ 748 struct drm_i915_private *dev_priv = dev->dev_private; 749 if (dev_priv->fbdev) 750 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper); 751} 752 753void intel_fbdev_restore_mode(struct drm_device *dev) 754{ 755 int ret; 756 struct drm_i915_private *dev_priv = dev->dev_private; 757 758 if (!dev_priv->fbdev) 759 return; 760 761 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper); 762 if (ret) 763 DRM_DEBUG("failed to restore crtc mode\n"); 764} 765