drivers/gpu/drm/i915/intel_fbdev.c

   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 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
  85                                    struct fb_info *info)
  86 {
  87         struct drm_fb_helper *fb_helper = info->par;
  88         struct intel_fbdev *ifbdev =
  89                 container_of(fb_helper, struct intel_fbdev, helper);
  90         int ret;
  91
  92         ret = drm_fb_helper_pan_display(var, info);
  93         if (ret == 0)
  94                 intel_fbdev_invalidate(ifbdev);
  95
  96         return ret;
  97 }
  98
  99 static struct fb_ops intelfb_ops = {
 100         .owner = THIS_MODULE,
 101         DRM_FB_HELPER_DEFAULT_OPS,
 102         .fb_set_par = intel_fbdev_set_par,
 103         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 104         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 105         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 106         .fb_pan_display = intel_fbdev_pan_display,
 107         .fb_blank = intel_fbdev_blank,
 108 };
 109
 110 static int intelfb_alloc(struct drm_fb_helper *helper,
 111                          struct drm_fb_helper_surface_size *sizes)
 112 {
 113         struct intel_fbdev *ifbdev =
 114                 container_of(helper, struct intel_fbdev, helper);
 115         struct drm_framebuffer *fb;
 116         struct drm_device *dev = helper->dev;
 117         struct drm_i915_private *dev_priv = to_i915(dev);
 118         struct drm_mode_fb_cmd2 mode_cmd = {};
 119         struct drm_i915_gem_object *obj;
 120         int size, ret;
 121
 122         /* we don't do packed 24bpp */
 123         if (sizes->surface_bpp == 24)
 124                 sizes->surface_bpp = 32;
 125
 126         mode_cmd.width = sizes->surface_width;
 127         mode_cmd.height = sizes->surface_height;
 128
 129         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
 130                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
 131         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 132                                                           sizes->surface_depth);
 133
 134         size = mode_cmd.pitches[0] * mode_cmd.height;
 135         size = PAGE_ALIGN(size);
 136
 137         /* If the FB is too big, just don't use it since fbdev is not very
 138          * important and we should probably use that space with FBC or other
 139          * features. */
 140         obj = NULL;
 141         if (size * 2 < dev_priv->stolen_usable_size)
 142                 obj = i915_gem_object_create_stolen(dev_priv, size);
 143         if (obj == NULL)
 144                 obj = i915_gem_object_create(dev_priv, size);
 145         if (IS_ERR(obj)) {
 146                 DRM_ERROR("failed to allocate framebuffer\n");
 147                 ret = PTR_ERR(obj);
 148                 goto err;
 149         }
 150
 151         fb = intel_framebuffer_create(obj, &mode_cmd);
 152         if (IS_ERR(fb)) {
 153                 ret = PTR_ERR(fb);
 154                 goto err_obj;
 155         }
 156
 157         ifbdev->fb = to_intel_framebuffer(fb);
 158
 159         return 0;
 160
 161 err_obj:
 162         i915_gem_object_put(obj);
 163 err:
 164         return ret;
 165 }
 166
 167 static int intelfb_create(struct drm_fb_helper *helper,
 168                           struct drm_fb_helper_surface_size *sizes)
 169 {
 170         struct intel_fbdev *ifbdev =
 171                 container_of(helper, struct intel_fbdev, helper);
 172         struct intel_framebuffer *intel_fb = ifbdev->fb;
 173         struct drm_device *dev = helper->dev;
 174         struct drm_i915_private *dev_priv = to_i915(dev);
 175         struct pci_dev *pdev = dev_priv->drm.pdev;
 176         struct i915_ggtt *ggtt = &dev_priv->ggtt;
 177         struct fb_info *info;
 178         struct drm_framebuffer *fb;
 179         struct i915_vma *vma;
 180         bool prealloc = false;
 181         void __iomem *vaddr;
 182         int ret;
 183
 184         if (intel_fb &&
 185             (sizes->fb_width > intel_fb->base.width ||
 186              sizes->fb_height > intel_fb->base.height)) {
 187                 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
 188                               " releasing it\n",
 189                               intel_fb->base.width, intel_fb->base.height,
 190                               sizes->fb_width, sizes->fb_height);
 191                 drm_framebuffer_put(&intel_fb->base);
 192                 intel_fb = ifbdev->fb = NULL;
 193         }
 194         if (!intel_fb || WARN_ON(!intel_fb->obj)) {
 195                 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
 196                 ret = intelfb_alloc(helper, sizes);
 197                 if (ret)
 198                         return ret;
 199                 intel_fb = ifbdev->fb;
 200         } else {
 201                 DRM_DEBUG_KMS("re-using BIOS fb\n");
 202                 prealloc = true;
 203                 sizes->fb_width = intel_fb->base.width;
 204                 sizes->fb_height = intel_fb->base.height;
 205         }
 206
 207         mutex_lock(&dev->struct_mutex);
 208         intel_runtime_pm_get(dev_priv);
 209
 210         /* Pin the GGTT vma for our access via info->screen_base.
 211          * This also validates that any existing fb inherited from the
 212          * BIOS is suitable for own access.
 213          */
 214         vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, DRM_MODE_ROTATE_0);
 215         if (IS_ERR(vma)) {
 216                 ret = PTR_ERR(vma);
 217                 goto out_unlock;
 218         }
 219
 220         info = drm_fb_helper_alloc_fbi(helper);
 221         if (IS_ERR(info)) {
 222                 DRM_ERROR("Failed to allocate fb_info\n");
 223                 ret = PTR_ERR(info);
 224                 goto out_unpin;
 225         }
 226
 227         info->par = helper;
 228
 229         fb = &ifbdev->fb->base;
 230
 231         ifbdev->helper.fb = fb;
 232
 233         strcpy(info->fix.id, "inteldrmfb");
 234
 235         info->fbops = &intelfb_ops;
 236
 237         /* setup aperture base/size for vesafb takeover */
 238         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 239         info->apertures->ranges[0].size = ggtt->mappable_end;
 240
 241         info->fix.smem_start = dev->mode_config.fb_base + i915_ggtt_offset(vma);
 242         info->fix.smem_len = vma->node.size;
 243
 244         vaddr = i915_vma_pin_iomap(vma);
 245         if (IS_ERR(vaddr)) {
 246                 DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
 247                 ret = PTR_ERR(vaddr);
 248                 goto out_unpin;
 249         }
 250         info->screen_base = vaddr;
 251         info->screen_size = vma->node.size;
 252
 253         /* This driver doesn't need a VT switch to restore the mode on resume */
 254         info->skip_vt_switch = true;
 255
 256         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
 257         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 258
 259         /* If the object is shmemfs backed, it will have given us zeroed pages.
 260          * If the object is stolen however, it will be full of whatever
 261          * garbage was left in there.
 262          */
 263         if (intel_fb->obj->stolen && !prealloc)
 264                 memset_io(info->screen_base, 0, info->screen_size);
 265
 266         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 267
 268         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x\n",
 269                       fb->width, fb->height, i915_ggtt_offset(vma));
 270         ifbdev->vma = vma;
 271
 272         intel_runtime_pm_put(dev_priv);
 273         mutex_unlock(&dev->struct_mutex);
 274         vga_switcheroo_client_fb_set(pdev, info);
 275         return 0;
 276
 277 out_unpin:
 278         intel_unpin_fb_vma(vma);
 279 out_unlock:
 280         intel_runtime_pm_put(dev_priv);
 281         mutex_unlock(&dev->struct_mutex);
 282         return ret;
 283 }
 284
 285 static struct drm_fb_helper_crtc *
 286 intel_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  */
 324 static 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                                     struct drm_fb_offset *offsets,
 328                                     bool *enabled, int width, int height)
 329 {
 330         struct drm_i915_private *dev_priv = to_i915(fb_helper->dev);
 331         unsigned long conn_configured, conn_seq, mask;
 332         unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG);
 333         int i, j;
 334         bool *save_enabled;
 335         bool fallback = true, ret = true;
 336         int num_connectors_enabled = 0;
 337         int num_connectors_detected = 0;
 338         struct drm_modeset_acquire_ctx ctx;
 339
 340         save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
 341         if (!save_enabled)
 342                 return false;
 343
 344         drm_modeset_acquire_init(&ctx, 0);
 345
 346         while (drm_modeset_lock_all_ctx(fb_helper->dev, &ctx) != 0)
 347                 drm_modeset_backoff(&ctx);
 348
 349         memcpy(save_enabled, enabled, count);
 350         mask = GENMASK(count - 1, 0);
 351         conn_configured = 0;
 352 retry:
 353         conn_seq = conn_configured;
 354         for (i = 0; i < count; i++) {
 355                 struct drm_fb_helper_connector *fb_conn;
 356                 struct drm_connector *connector;
 357                 struct drm_encoder *encoder;
 358                 struct drm_fb_helper_crtc *new_crtc;
 359
 360                 fb_conn = fb_helper->connector_info[i];
 361                 connector = fb_conn->connector;
 362
 363                 if (conn_configured & BIT(i))
 364                         continue;
 365
 366                 if (conn_seq == 0 && !connector->has_tile)
 367                         continue;
 368
 369                 if (connector->status == connector_status_connected)
 370                         num_connectors_detected++;
 371
 372                 if (!enabled[i]) {
 373                         DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
 374                                       connector->name);
 375                         conn_configured |= BIT(i);
 376                         continue;
 377                 }
 378
 379                 if (connector->force == DRM_FORCE_OFF) {
 380                         DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
 381                                       connector->name);
 382                         enabled[i] = false;
 383                         continue;
 384                 }
 385
 386                 encoder = connector->state->best_encoder;
 387                 if (!encoder || WARN_ON(!connector->state->crtc)) {
 388                         if (connector->force > DRM_FORCE_OFF)
 389                                 goto bail;
 390
 391                         DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
 392                                       connector->name);
 393                         enabled[i] = false;
 394                         conn_configured |= BIT(i);
 395                         continue;
 396                 }
 397
 398                 num_connectors_enabled++;
 399
 400                 new_crtc = intel_fb_helper_crtc(fb_helper,
 401                                                 connector->state->crtc);
 402
 403                 /*
 404                  * Make sure we're not trying to drive multiple connectors
 405                  * with a single CRTC, since our cloning support may not
 406                  * match the BIOS.
 407                  */
 408                 for (j = 0; j < count; j++) {
 409                         if (crtcs[j] == new_crtc) {
 410                                 DRM_DEBUG_KMS("fallback: cloned configuration\n");
 411                                 goto bail;
 412                         }
 413                 }
 414
 415                 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
 416                               connector->name);
 417
 418                 /* go for command line mode first */
 419                 modes[i] = drm_pick_cmdline_mode(fb_conn);
 420
 421                 /* try for preferred next */
 422                 if (!modes[i]) {
 423                         DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
 424                                       connector->name, connector->has_tile);
 425                         modes[i] = drm_has_preferred_mode(fb_conn, width,
 426                                                           height);
 427                 }
 428
 429                 /* No preferred mode marked by the EDID? Are there any modes? */
 430                 if (!modes[i] && !list_empty(&connector->modes)) {
 431                         DRM_DEBUG_KMS("using first mode listed on connector %s\n",
 432                                       connector->name);
 433                         modes[i] = list_first_entry(&connector->modes,
 434                                                     struct drm_display_mode,
 435                                                     head);
 436                 }
 437
 438                 /* last resort: use current mode */
 439                 if (!modes[i]) {
 440                         /*
 441                          * IMPORTANT: We want to use the adjusted mode (i.e.
 442                          * after the panel fitter upscaling) as the initial
 443                          * config, not the input mode, which is what crtc->mode
 444                          * usually contains. But since our current
 445                          * code puts a mode derived from the post-pfit timings
 446                          * into crtc->mode this works out correctly.
 447                          *
 448                          * This is crtc->mode and not crtc->state->mode for the
 449                          * fastboot check to work correctly. crtc_state->mode has
 450                          * I915_MODE_FLAG_INHERITED, which we clear to force check
 451                          * state.
 452                          */
 453                         DRM_DEBUG_KMS("looking for current mode on connector %s\n",
 454                                       connector->name);
 455                         modes[i] = &connector->state->crtc->mode;
 456                 }
 457                 crtcs[i] = new_crtc;
 458
 459                 DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
 460                               connector->name,
 461                               connector->state->crtc->base.id,
 462                               connector->state->crtc->name,
 463                               modes[i]->hdisplay, modes[i]->vdisplay,
 464                               modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
 465
 466                 fallback = false;
 467                 conn_configured |= BIT(i);
 468         }
 469
 470         if ((conn_configured & mask) != mask && conn_configured != conn_seq)
 471                 goto retry;
 472
 473         /*
 474          * If the BIOS didn't enable everything it could, fall back to have the
 475          * same user experiencing of lighting up as much as possible like the
 476          * fbdev helper library.
 477          */
 478         if (num_connectors_enabled != num_connectors_detected &&
 479             num_connectors_enabled < INTEL_INFO(dev_priv)->num_pipes) {
 480                 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
 481                 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
 482                               num_connectors_detected);
 483                 fallback = true;
 484         }
 485
 486         if (fallback) {
 487 bail:
 488                 DRM_DEBUG_KMS("Not using firmware configuration\n");
 489                 memcpy(enabled, save_enabled, count);
 490                 ret = false;
 491         }
 492
 493         drm_modeset_drop_locks(&ctx);
 494         drm_modeset_acquire_fini(&ctx);
 495
 496         kfree(save_enabled);
 497         return ret;
 498 }
 499
 500 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 501         .initial_config = intel_fb_initial_config,
 502         .fb_probe = intelfb_create,
 503 };
 504
 505 static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
 506 {
 507         /* We rely on the object-free to release the VMA pinning for
 508          * the info->screen_base mmaping. Leaking the VMA is simpler than
 509          * trying to rectify all the possible error paths leading here.
 510          */
 511
 512         drm_fb_helper_fini(&ifbdev->helper);
 513
 514         if (ifbdev->vma) {
 515                 mutex_lock(&ifbdev->helper.dev->struct_mutex);
 516                 intel_unpin_fb_vma(ifbdev->vma);
 517                 mutex_unlock(&ifbdev->helper.dev->struct_mutex);
 518         }
 519
 520         if (ifbdev->fb)
 521                 drm_framebuffer_remove(&ifbdev->fb->base);
 522
 523         kfree(ifbdev);
 524 }
 525
 526 /*
 527  * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
 528  * The core display code will have read out the current plane configuration,
 529  * so we use that to figure out if there's an object for us to use as the
 530  * fb, and if so, we re-use it for the fbdev configuration.
 531  *
 532  * Note we only support a single fb shared across pipes for boot (mostly for
 533  * fbcon), so we just find the biggest and use that.
 534  */
 535 static bool intel_fbdev_init_bios(struct drm_device *dev,
 536                                  struct intel_fbdev *ifbdev)
 537 {
 538         struct intel_framebuffer *fb = NULL;
 539         struct drm_crtc *crtc;
 540         struct intel_crtc *intel_crtc;
 541         unsigned int max_size = 0;
 542
 543         /* Find the largest fb */
 544         for_each_crtc(dev, crtc) {
 545                 struct drm_i915_gem_object *obj =
 546                         intel_fb_obj(crtc->primary->state->fb);
 547                 intel_crtc = to_intel_crtc(crtc);
 548
 549                 if (!crtc->state->active || !obj) {
 550                         DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
 551                                       pipe_name(intel_crtc->pipe));
 552                         continue;
 553                 }
 554
 555                 if (obj->base.size > max_size) {
 556                         DRM_DEBUG_KMS("found possible fb from plane %c\n",
 557                                       pipe_name(intel_crtc->pipe));
 558                         fb = to_intel_framebuffer(crtc->primary->state->fb);
 559                         max_size = obj->base.size;
 560                 }
 561         }
 562
 563         if (!fb) {
 564                 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
 565                 goto out;
 566         }
 567
 568         /* Now make sure all the pipes will fit into it */
 569         for_each_crtc(dev, crtc) {
 570                 unsigned int cur_size;
 571
 572                 intel_crtc = to_intel_crtc(crtc);
 573
 574                 if (!crtc->state->active) {
 575                         DRM_DEBUG_KMS("pipe %c not active, skipping\n",
 576                                       pipe_name(intel_crtc->pipe));
 577                         continue;
 578                 }
 579
 580                 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
 581                               pipe_name(intel_crtc->pipe));
 582
 583                 /*
 584                  * See if the plane fb we found above will fit on this
 585                  * pipe.  Note we need to use the selected fb's pitch and bpp
 586                  * rather than the current pipe's, since they differ.
 587                  */
 588                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
 589                 cur_size = cur_size * fb->base.format->cpp[0];
 590                 if (fb->base.pitches[0] < cur_size) {
 591                         DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
 592                                       pipe_name(intel_crtc->pipe),
 593                                       cur_size, fb->base.pitches[0]);
 594                         fb = NULL;
 595                         break;
 596                 }
 597
 598                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
 599                 cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
 600                 cur_size *= fb->base.pitches[0];
 601                 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
 602                               pipe_name(intel_crtc->pipe),
 603                               intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
 604                               intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
 605                               fb->base.format->cpp[0] * 8,
 606                               cur_size);
 607
 608                 if (cur_size > max_size) {
 609                         DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
 610                                       pipe_name(intel_crtc->pipe),
 611                                       cur_size, max_size);
 612                         fb = NULL;
 613                         break;
 614                 }
 615
 616                 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
 617                               pipe_name(intel_crtc->pipe),
 618                               max_size, cur_size);
 619         }
 620
 621         if (!fb) {
 622                 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
 623                 goto out;
 624         }
 625
 626         ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
 627         ifbdev->fb = fb;
 628
 629         drm_framebuffer_get(&ifbdev->fb->base);
 630
 631         /* Final pass to check if any active pipes don't have fbs */
 632         for_each_crtc(dev, crtc) {
 633                 intel_crtc = to_intel_crtc(crtc);
 634
 635                 if (!crtc->state->active)
 636                         continue;
 637
 638                 WARN(!crtc->primary->fb,
 639                      "re-used BIOS config but lost an fb on crtc %d\n",
 640                      crtc->base.id);
 641         }
 642
 643
 644         DRM_DEBUG_KMS("using BIOS fb for initial console\n");
 645         return true;
 646
 647 out:
 648
 649         return false;
 650 }
 651
 652 static void intel_fbdev_suspend_worker(struct work_struct *work)
 653 {
 654         intel_fbdev_set_suspend(&container_of(work,
 655                                               struct drm_i915_private,
 656                                               fbdev_suspend_work)->drm,
 657                                 FBINFO_STATE_RUNNING,
 658                                 true);
 659 }
 660
 661 int intel_fbdev_init(struct drm_device *dev)
 662 {
 663         struct drm_i915_private *dev_priv = to_i915(dev);
 664         struct intel_fbdev *ifbdev;
 665         int ret;
 666
 667         if (WARN_ON(INTEL_INFO(dev_priv)->num_pipes == 0))
 668                 return -ENODEV;
 669
 670         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 671         if (ifbdev == NULL)
 672                 return -ENOMEM;
 673
 674         drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
 675
 676         if (!intel_fbdev_init_bios(dev, ifbdev))
 677                 ifbdev->preferred_bpp = 32;
 678
 679         ret = drm_fb_helper_init(dev, &ifbdev->helper, 4);
 680         if (ret) {
 681                 kfree(ifbdev);
 682                 return ret;
 683         }
 684
 685         dev_priv->fbdev = ifbdev;
 686         INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
 687
 688         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 689
 690         return 0;
 691 }
 692
 693 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
 694 {
 695         struct intel_fbdev *ifbdev = data;
 696
 697         /* Due to peculiar init order wrt to hpd handling this is separate. */
 698         if (drm_fb_helper_initial_config(&ifbdev->helper,
 699                                          ifbdev->preferred_bpp))
 700                 intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
 701 }
 702
 703 void intel_fbdev_initial_config_async(struct drm_device *dev)
 704 {
 705         struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
 706
 707         if (!ifbdev)
 708                 return;
 709
 710         ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
 711 }
 712
 713 static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
 714 {
 715         if (!ifbdev->cookie)
 716                 return;
 717
 718         /* Only serialises with all preceding async calls, hence +1 */
 719         async_synchronize_cookie(ifbdev->cookie + 1);
 720         ifbdev->cookie = 0;
 721 }
 722
 723 void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
 724 {
 725         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 726
 727         if (!ifbdev)
 728                 return;
 729
 730         cancel_work_sync(&dev_priv->fbdev_suspend_work);
 731         if (!current_is_async())
 732                 intel_fbdev_sync(ifbdev);
 733
 734         drm_fb_helper_unregister_fbi(&ifbdev->helper);
 735 }
 736
 737 void intel_fbdev_fini(struct drm_i915_private *dev_priv)
 738 {
 739         struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev);
 740
 741         if (!ifbdev)
 742                 return;
 743
 744         intel_fbdev_destroy(ifbdev);
 745 }
 746
 747 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
 748 {
 749         struct drm_i915_private *dev_priv = to_i915(dev);
 750         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 751         struct fb_info *info;
 752
 753         if (!ifbdev || !ifbdev->vma)
 754                 return;
 755
 756         info = ifbdev->helper.fbdev;
 757
 758         if (synchronous) {
 759                 /* Flush any pending work to turn the console on, and then
 760                  * wait to turn it off. It must be synchronous as we are
 761                  * about to suspend or unload the driver.
 762                  *
 763                  * Note that from within the work-handler, we cannot flush
 764                  * ourselves, so only flush outstanding work upon suspend!
 765                  */
 766                 if (state != FBINFO_STATE_RUNNING)
 767                         flush_work(&dev_priv->fbdev_suspend_work);
 768                 console_lock();
 769         } else {
 770                 /*
 771                  * The console lock can be pretty contented on resume due
 772                  * to all the printk activity.  Try to keep it out of the hot
 773                  * path of resume if possible.
 774                  */
 775                 WARN_ON(state != FBINFO_STATE_RUNNING);
 776                 if (!console_trylock()) {
 777                         /* Don't block our own workqueue as this can
 778                          * be run in parallel with other i915.ko tasks.
 779                          */
 780                         schedule_work(&dev_priv->fbdev_suspend_work);
 781                         return;
 782                 }
 783         }
 784
 785         /* On resume from hibernation: If the object is shmemfs backed, it has
 786          * been restored from swap. If the object is stolen however, it will be
 787          * full of whatever garbage was left in there.
 788          */
 789         if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
 790                 memset_io(info->screen_base, 0, info->screen_size);
 791
 792         drm_fb_helper_set_suspend(&ifbdev->helper, state);
 793         console_unlock();
 794 }
 795
 796 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 797 {
 798         struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
 799
 800         if (!ifbdev)
 801                 return;
 802
 803         intel_fbdev_sync(ifbdev);
 804         if (ifbdev->vma)
 805                 drm_fb_helper_hotplug_event(&ifbdev->helper);
 806 }
 807
 808 void intel_fbdev_restore_mode(struct drm_device *dev)
 809 {
 810         struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
 811
 812         if (!ifbdev)
 813                 return;
 814
 815         intel_fbdev_sync(ifbdev);
 816         if (!ifbdev->vma)
 817                 return;
 818
 819         if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
 820                 intel_fbdev_invalidate(ifbdev);
 821 }