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/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/console.h>
  30 #include <linux/errno.h>
  31 #include <linux/string.h>
  32 #include <linux/mm.h>
  33 #include <linux/tty.h>
  34 #include <linux/sysrq.h>
  35 #include <linux/delay.h>
  36 #include <linux/fb.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 <drm/i915_drm.h>
  45 #include "i915_drv.h"
  46
  47 static int intel_fbdev_set_par(struct fb_info *info)
  48 {
  49         struct drm_fb_helper *fb_helper = info->par;
  50         struct intel_fbdev *ifbdev =
  51                 container_of(fb_helper, struct intel_fbdev, helper);
  52         int ret;
  53
  54         ret = drm_fb_helper_set_par(info);
  55
  56         if (ret == 0) {
  57                 /*
  58                  * FIXME: fbdev presumes that all callbacks also work from
  59                  * atomic contexts and relies on that for emergency oops
  60                  * printing. KMS totally doesn't do that and the locking here is
  61                  * by far not the only place this goes wrong.  Ignore this for
  62                  * now until we solve this for real.
  63                  */
  64                 mutex_lock(&fb_helper->dev->struct_mutex);
  65                 ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj,
  66                                                         true);
  67                 mutex_unlock(&fb_helper->dev->struct_mutex);
  68         }
  69
  70         return ret;
  71 }
  72
  73 static struct fb_ops intelfb_ops = {
  74         .owner = THIS_MODULE,
  75         .fb_check_var = drm_fb_helper_check_var,
  76         .fb_set_par = intel_fbdev_set_par,
  77         .fb_fillrect = cfb_fillrect,
  78         .fb_copyarea = cfb_copyarea,
  79         .fb_imageblit = cfb_imageblit,
  80         .fb_pan_display = drm_fb_helper_pan_display,
  81         .fb_blank = drm_fb_helper_blank,
  82         .fb_setcmap = drm_fb_helper_setcmap,
  83         .fb_debug_enter = drm_fb_helper_debug_enter,
  84         .fb_debug_leave = drm_fb_helper_debug_leave,
  85 };
  86
  87 static int intelfb_alloc(struct drm_fb_helper *helper,
  88                          struct drm_fb_helper_surface_size *sizes)
  89 {
  90         struct intel_fbdev *ifbdev =
  91                 container_of(helper, struct intel_fbdev, helper);
  92         struct drm_framebuffer *fb;
  93         struct drm_device *dev = helper->dev;
  94         struct drm_mode_fb_cmd2 mode_cmd = {};
  95         struct drm_i915_gem_object *obj;
  96         int size, ret;
  97
  98         /* we don't do packed 24bpp */
  99         if (sizes->surface_bpp == 24)
 100                 sizes->surface_bpp = 32;
 101
 102         mode_cmd.width = sizes->surface_width;
 103         mode_cmd.height = sizes->surface_height;
 104
 105         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
 106                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
 107         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 108                                                           sizes->surface_depth);
 109
 110         size = mode_cmd.pitches[0] * mode_cmd.height;
 111         size = PAGE_ALIGN(size);
 112         obj = i915_gem_object_create_stolen(dev, size);
 113         if (obj == NULL)
 114                 obj = i915_gem_alloc_object(dev, size);
 115         if (!obj) {
 116                 DRM_ERROR("failed to allocate framebuffer\n");
 117                 ret = -ENOMEM;
 118                 goto out;
 119         }
 120
 121         /* Flush everything out, we'll be doing GTT only from now on */
 122         ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
 123         if (ret) {
 124                 DRM_ERROR("failed to pin obj: %d\n", ret);
 125                 goto out_unref;
 126         }
 127
 128         fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
 129         if (IS_ERR(fb)) {
 130                 ret = PTR_ERR(fb);
 131                 goto out_unpin;
 132         }
 133
 134         ifbdev->fb = to_intel_framebuffer(fb);
 135
 136         return 0;
 137
 138 out_unpin:
 139         i915_gem_object_ggtt_unpin(obj);
 140 out_unref:
 141         drm_gem_object_unreference(&obj->base);
 142 out:
 143         return ret;
 144 }
 145
 146 static int intelfb_create(struct drm_fb_helper *helper,
 147                           struct drm_fb_helper_surface_size *sizes)
 148 {
 149         struct intel_fbdev *ifbdev =
 150                 container_of(helper, struct intel_fbdev, helper);
 151         struct intel_framebuffer *intel_fb = ifbdev->fb;
 152         struct drm_device *dev = helper->dev;
 153         struct drm_i915_private *dev_priv = dev->dev_private;
 154         struct fb_info *info;
 155         struct drm_framebuffer *fb;
 156         struct drm_i915_gem_object *obj;
 157         int size, ret;
 158         bool prealloc = false;
 159
 160         mutex_lock(&dev->struct_mutex);
 161
 162         if (intel_fb &&
 163             (sizes->fb_width > intel_fb->base.width ||
 164              sizes->fb_height > intel_fb->base.height)) {
 165                 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
 166                               " releasing it\n",
 167                               intel_fb->base.width, intel_fb->base.height,
 168                               sizes->fb_width, sizes->fb_height);
 169                 drm_framebuffer_unreference(&intel_fb->base);
 170                 intel_fb = ifbdev->fb = NULL;
 171         }
 172         if (!intel_fb || WARN_ON(!intel_fb->obj)) {
 173                 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
 174                 ret = intelfb_alloc(helper, sizes);
 175                 if (ret)
 176                         goto out_unlock;
 177                 intel_fb = ifbdev->fb;
 178         } else {
 179                 DRM_DEBUG_KMS("re-using BIOS fb\n");
 180                 prealloc = true;
 181                 sizes->fb_width = intel_fb->base.width;
 182                 sizes->fb_height = intel_fb->base.height;
 183         }
 184
 185         obj = intel_fb->obj;
 186         size = obj->base.size;
 187
 188         info = framebuffer_alloc(0, &dev->pdev->dev);
 189         if (!info) {
 190                 ret = -ENOMEM;
 191                 goto out_unpin;
 192         }
 193
 194         info->par = helper;
 195
 196         fb = &ifbdev->fb->base;
 197
 198         ifbdev->helper.fb = fb;
 199         ifbdev->helper.fbdev = info;
 200
 201         strcpy(info->fix.id, "inteldrmfb");
 202
 203         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 204         info->fbops = &intelfb_ops;
 205
 206         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 207         if (ret) {
 208                 ret = -ENOMEM;
 209                 goto out_unpin;
 210         }
 211         /* setup aperture base/size for vesafb takeover */
 212         info->apertures = alloc_apertures(1);
 213         if (!info->apertures) {
 214                 ret = -ENOMEM;
 215                 goto out_unpin;
 216         }
 217         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 218         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 219
 220         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
 221         info->fix.smem_len = size;
 222
 223         info->screen_base =
 224                 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
 225                            size);
 226         if (!info->screen_base) {
 227                 ret = -ENOSPC;
 228                 goto out_unpin;
 229         }
 230         info->screen_size = size;
 231
 232         /* This driver doesn't need a VT switch to restore the mode on resume */
 233         info->skip_vt_switch = true;
 234
 235         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 236         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 237
 238         /* If the object is shmemfs backed, it will have given us zeroed pages.
 239          * If the object is stolen however, it will be full of whatever
 240          * garbage was left in there.
 241          */
 242         if (ifbdev->fb->obj->stolen && !prealloc)
 243                 memset_io(info->screen_base, 0, info->screen_size);
 244
 245         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 246
 247         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
 248                       fb->width, fb->height,
 249                       i915_gem_obj_ggtt_offset(obj), obj);
 250
 251         mutex_unlock(&dev->struct_mutex);
 252         vga_switcheroo_client_fb_set(dev->pdev, info);
 253         return 0;
 254
 255 out_unpin:
 256         i915_gem_object_ggtt_unpin(obj);
 257         drm_gem_object_unreference(&obj->base);
 258 out_unlock:
 259         mutex_unlock(&dev->struct_mutex);
 260         return ret;
 261 }
 262
 263 /** Sets the color ramps on behalf of RandR */
 264 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 265                                     u16 blue, int regno)
 266 {
 267         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 268
 269         intel_crtc->lut_r[regno] = red >> 8;
 270         intel_crtc->lut_g[regno] = green >> 8;
 271         intel_crtc->lut_b[regno] = blue >> 8;
 272 }
 273
 274 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 275                                     u16 *blue, int regno)
 276 {
 277         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 278
 279         *red = intel_crtc->lut_r[regno] << 8;
 280         *green = intel_crtc->lut_g[regno] << 8;
 281         *blue = intel_crtc->lut_b[regno] << 8;
 282 }
 283
 284 static struct drm_fb_helper_crtc *
 285 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
 286 {
 287         int i;
 288
 289         for (i = 0; i < fb_helper->crtc_count; i++)
 290                 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
 291                         return &fb_helper->crtc_info[i];
 292
 293         return NULL;
 294 }
 295
 296 /*
 297  * Try to read the BIOS display configuration and use it for the initial
 298  * fb configuration.
 299  *
 300  * The BIOS or boot loader will generally create an initial display
 301  * configuration for us that includes some set of active pipes and displays.
 302  * This routine tries to figure out which pipes and connectors are active
 303  * and stuffs them into the crtcs and modes array given to us by the
 304  * drm_fb_helper code.
 305  *
 306  * The overall sequence is:
 307  *   intel_fbdev_init - from driver load
 308  *     intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
 309  *     drm_fb_helper_init - build fb helper structs
 310  *     drm_fb_helper_single_add_all_connectors - more fb helper structs
 311  *   intel_fbdev_initial_config - apply the config
 312  *     drm_fb_helper_initial_config - call ->probe then register_framebuffer()
 313  *         drm_setup_crtcs - build crtc config for fbdev
 314  *           intel_fb_initial_config - find active connectors etc
 315  *         drm_fb_helper_single_fb_probe - set up fbdev
 316  *           intelfb_create - re-use or alloc fb, build out fbdev structs
 317  *
 318  * Note that we don't make special consideration whether we could actually
 319  * switch to the selected modes without a full modeset. E.g. when the display
 320  * is in VGA mode we need to recalculate watermarks and set a new high-res
 321  * framebuffer anyway.
 322  */
 323 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
 324                                     struct drm_fb_helper_crtc **crtcs,
 325                                     struct drm_display_mode **modes,
 326                                     bool *enabled, int width, int height)
 327 {
 328         struct drm_device *dev = fb_helper->dev;
 329         int i, j;
 330         bool *save_enabled;
 331         bool fallback = true;
 332         int num_connectors_enabled = 0;
 333         int num_connectors_detected = 0;
 334
 335         /*
 336          * If the user specified any force options, just bail here
 337          * and use that config.
 338          */
 339         for (i = 0; i < fb_helper->connector_count; i++) {
 340                 struct drm_fb_helper_connector *fb_conn;
 341                 struct drm_connector *connector;
 342
 343                 fb_conn = fb_helper->connector_info[i];
 344                 connector = fb_conn->connector;
 345
 346                 if (!enabled[i])
 347                         continue;
 348
 349                 if (connector->force != DRM_FORCE_UNSPECIFIED)
 350                         return false;
 351         }
 352
 353         save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
 354                                GFP_KERNEL);
 355         if (!save_enabled)
 356                 return false;
 357
 358         memcpy(save_enabled, enabled, dev->mode_config.num_connector);
 359
 360         for (i = 0; i < fb_helper->connector_count; i++) {
 361                 struct drm_fb_helper_connector *fb_conn;
 362                 struct drm_connector *connector;
 363                 struct drm_encoder *encoder;
 364                 struct drm_fb_helper_crtc *new_crtc;
 365
 366                 fb_conn = fb_helper->connector_info[i];
 367                 connector = fb_conn->connector;
 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                         continue;
 376                 }
 377
 378                 encoder = connector->encoder;
 379                 if (!encoder || WARN_ON(!encoder->crtc)) {
 380                         DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
 381                                       connector->name);
 382                         enabled[i] = false;
 383                         continue;
 384                 }
 385
 386                 num_connectors_enabled++;
 387
 388                 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
 389
 390                 /*
 391                  * Make sure we're not trying to drive multiple connectors
 392                  * with a single CRTC, since our cloning support may not
 393                  * match the BIOS.
 394                  */
 395                 for (j = 0; j < fb_helper->connector_count; j++) {
 396                         if (crtcs[j] == new_crtc) {
 397                                 DRM_DEBUG_KMS("fallback: cloned configuration\n");
 398                                 fallback = true;
 399                                 goto out;
 400                         }
 401                 }
 402
 403                 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
 404                               connector->name);
 405
 406                 /* go for command line mode first */
 407                 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
 408
 409                 /* try for preferred next */
 410                 if (!modes[i]) {
 411                         DRM_DEBUG_KMS("looking for preferred mode on connector %s\n",
 412                                       connector->name);
 413                         modes[i] = drm_has_preferred_mode(fb_conn, width,
 414                                                           height);
 415                 }
 416
 417                 /* No preferred mode marked by the EDID? Are there any modes? */
 418                 if (!modes[i] && !list_empty(&connector->modes)) {
 419                         DRM_DEBUG_KMS("using first mode listed on connector %s\n",
 420                                       connector->name);
 421                         modes[i] = list_first_entry(&connector->modes,
 422                                                     struct drm_display_mode,
 423                                                     head);
 424                 }
 425
 426                 /* last resort: use current mode */
 427                 if (!modes[i]) {
 428                         /*
 429                          * IMPORTANT: We want to use the adjusted mode (i.e.
 430                          * after the panel fitter upscaling) as the initial
 431                          * config, not the input mode, which is what crtc->mode
 432                          * usually contains. But since our current fastboot
 433                          * code puts a mode derived from the post-pfit timings
 434                          * into crtc->mode this works out correctly. We don't
 435                          * use hwmode anywhere right now, so use it for this
 436                          * since the fb helper layer wants a pointer to
 437                          * something we own.
 438                          */
 439                         DRM_DEBUG_KMS("looking for current mode on connector %s\n",
 440                                       connector->name);
 441                         intel_mode_from_pipe_config(&encoder->crtc->hwmode,
 442                                                     &to_intel_crtc(encoder->crtc)->config);
 443                         modes[i] = &encoder->crtc->hwmode;
 444                 }
 445                 crtcs[i] = new_crtc;
 446
 447                 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
 448                               connector->name,
 449                               pipe_name(to_intel_crtc(encoder->crtc)->pipe),
 450                               encoder->crtc->base.id,
 451                               modes[i]->hdisplay, modes[i]->vdisplay,
 452                               modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
 453
 454                 fallback = false;
 455         }
 456
 457         /*
 458          * If the BIOS didn't enable everything it could, fall back to have the
 459          * same user experiencing of lighting up as much as possible like the
 460          * fbdev helper library.
 461          */
 462         if (num_connectors_enabled != num_connectors_detected &&
 463             num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
 464                 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
 465                 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
 466                               num_connectors_detected);
 467                 fallback = true;
 468         }
 469
 470 out:
 471         if (fallback) {
 472                 DRM_DEBUG_KMS("Not using firmware configuration\n");
 473                 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
 474                 kfree(save_enabled);
 475                 return false;
 476         }
 477
 478         kfree(save_enabled);
 479         return true;
 480 }
 481
 482 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 483         .initial_config = intel_fb_initial_config,
 484         .gamma_set = intel_crtc_fb_gamma_set,
 485         .gamma_get = intel_crtc_fb_gamma_get,
 486         .fb_probe = intelfb_create,
 487 };
 488
 489 static void intel_fbdev_destroy(struct drm_device *dev,
 490                                 struct intel_fbdev *ifbdev)
 491 {
 492         if (ifbdev->helper.fbdev) {
 493                 struct fb_info *info = ifbdev->helper.fbdev;
 494
 495                 unregister_framebuffer(info);
 496                 iounmap(info->screen_base);
 497                 if (info->cmap.len)
 498                         fb_dealloc_cmap(&info->cmap);
 499
 500                 framebuffer_release(info);
 501         }
 502
 503         drm_fb_helper_fini(&ifbdev->helper);
 504
 505         drm_framebuffer_unregister_private(&ifbdev->fb->base);
 506         drm_framebuffer_remove(&ifbdev->fb->base);
 507 }
 508
 509 /*
 510  * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
 511  * The core display code will have read out the current plane configuration,
 512  * so we use that to figure out if there's an object for us to use as the
 513  * fb, and if so, we re-use it for the fbdev configuration.
 514  *
 515  * Note we only support a single fb shared across pipes for boot (mostly for
 516  * fbcon), so we just find the biggest and use that.
 517  */
 518 static bool intel_fbdev_init_bios(struct drm_device *dev,
 519                                  struct intel_fbdev *ifbdev)
 520 {
 521         struct intel_framebuffer *fb = NULL;
 522         struct drm_crtc *crtc;
 523         struct intel_crtc *intel_crtc;
 524         struct intel_plane_config *plane_config = NULL;
 525         unsigned int max_size = 0;
 526
 527         if (!i915.fastboot)
 528                 return false;
 529
 530         /* Find the largest fb */
 531         for_each_crtc(dev, crtc) {
 532                 intel_crtc = to_intel_crtc(crtc);
 533
 534                 if (!intel_crtc->active || !crtc->primary->fb) {
 535                         DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
 536                                       pipe_name(intel_crtc->pipe));
 537                         continue;
 538                 }
 539
 540                 if (intel_crtc->plane_config.size > max_size) {
 541                         DRM_DEBUG_KMS("found possible fb from plane %c\n",
 542                                       pipe_name(intel_crtc->pipe));
 543                         plane_config = &intel_crtc->plane_config;
 544                         fb = to_intel_framebuffer(crtc->primary->fb);
 545                         max_size = plane_config->size;
 546                 }
 547         }
 548
 549         if (!fb) {
 550                 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
 551                 goto out;
 552         }
 553
 554         /* Now make sure all the pipes will fit into it */
 555         for_each_crtc(dev, crtc) {
 556                 unsigned int cur_size;
 557
 558                 intel_crtc = to_intel_crtc(crtc);
 559
 560                 if (!intel_crtc->active) {
 561                         DRM_DEBUG_KMS("pipe %c not active, skipping\n",
 562                                       pipe_name(intel_crtc->pipe));
 563                         continue;
 564                 }
 565
 566                 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
 567                               pipe_name(intel_crtc->pipe));
 568
 569                 /*
 570                  * See if the plane fb we found above will fit on this
 571                  * pipe.  Note we need to use the selected fb's pitch and bpp
 572                  * rather than the current pipe's, since they differ.
 573                  */
 574                 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay;
 575                 cur_size = cur_size * fb->base.bits_per_pixel / 8;
 576                 if (fb->base.pitches[0] < cur_size) {
 577                         DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
 578                                       pipe_name(intel_crtc->pipe),
 579                                       cur_size, fb->base.pitches[0]);
 580                         plane_config = NULL;
 581                         fb = NULL;
 582                         break;
 583                 }
 584
 585                 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay;
 586                 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1);
 587                 cur_size *= fb->base.pitches[0];
 588                 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
 589                               pipe_name(intel_crtc->pipe),
 590                               intel_crtc->config.adjusted_mode.crtc_hdisplay,
 591                               intel_crtc->config.adjusted_mode.crtc_vdisplay,
 592                               fb->base.bits_per_pixel,
 593                               cur_size);
 594
 595                 if (cur_size > max_size) {
 596                         DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
 597                                       pipe_name(intel_crtc->pipe),
 598                                       cur_size, max_size);
 599                         plane_config = NULL;
 600                         fb = NULL;
 601                         break;
 602                 }
 603
 604                 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
 605                               pipe_name(intel_crtc->pipe),
 606                               max_size, cur_size);
 607         }
 608
 609         if (!fb) {
 610                 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
 611                 goto out;
 612         }
 613
 614         ifbdev->preferred_bpp = fb->base.bits_per_pixel;
 615         ifbdev->fb = fb;
 616
 617         drm_framebuffer_reference(&ifbdev->fb->base);
 618
 619         /* Final pass to check if any active pipes don't have fbs */
 620         for_each_crtc(dev, crtc) {
 621                 intel_crtc = to_intel_crtc(crtc);
 622
 623                 if (!intel_crtc->active)
 624                         continue;
 625
 626                 WARN(!crtc->primary->fb,
 627                      "re-used BIOS config but lost an fb on crtc %d\n",
 628                      crtc->base.id);
 629         }
 630
 631
 632         DRM_DEBUG_KMS("using BIOS fb for initial console\n");
 633         return true;
 634
 635 out:
 636
 637         return false;
 638 }
 639
 640 static void intel_fbdev_suspend_worker(struct work_struct *work)
 641 {
 642         intel_fbdev_set_suspend(container_of(work,
 643                                              struct drm_i915_private,
 644                                              fbdev_suspend_work)->dev,
 645                                 FBINFO_STATE_RUNNING,
 646                                 true);
 647 }
 648
 649 int intel_fbdev_init(struct drm_device *dev)
 650 {
 651         struct intel_fbdev *ifbdev;
 652         struct drm_i915_private *dev_priv = dev->dev_private;
 653         int ret;
 654
 655         if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
 656                 return -ENODEV;
 657
 658         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 659         if (ifbdev == NULL)
 660                 return -ENOMEM;
 661
 662         drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
 663
 664         if (!intel_fbdev_init_bios(dev, ifbdev))
 665                 ifbdev->preferred_bpp = 32;
 666
 667         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 668                                  INTEL_INFO(dev)->num_pipes, 4);
 669         if (ret) {
 670                 kfree(ifbdev);
 671                 return ret;
 672         }
 673
 674         dev_priv->fbdev = ifbdev;
 675         INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
 676
 677         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 678
 679         return 0;
 680 }
 681
 682 void intel_fbdev_initial_config(struct drm_device *dev)
 683 {
 684         struct drm_i915_private *dev_priv = dev->dev_private;
 685         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 686
 687         /* Due to peculiar init order wrt to hpd handling this is separate. */
 688         drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
 689 }
 690
 691 void intel_fbdev_fini(struct drm_device *dev)
 692 {
 693         struct drm_i915_private *dev_priv = dev->dev_private;
 694         if (!dev_priv->fbdev)
 695                 return;
 696
 697         flush_work(&dev_priv->fbdev_suspend_work);
 698
 699         intel_fbdev_destroy(dev, dev_priv->fbdev);
 700         kfree(dev_priv->fbdev);
 701         dev_priv->fbdev = NULL;
 702 }
 703
 704 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
 705 {
 706         struct drm_i915_private *dev_priv = dev->dev_private;
 707         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 708         struct fb_info *info;
 709
 710         if (!ifbdev)
 711                 return;
 712
 713         info = ifbdev->helper.fbdev;
 714
 715         if (synchronous) {
 716                 /* Flush any pending work to turn the console on, and then
 717                  * wait to turn it off. It must be synchronous as we are
 718                  * about to suspend or unload the driver.
 719                  *
 720                  * Note that from within the work-handler, we cannot flush
 721                  * ourselves, so only flush outstanding work upon suspend!
 722                  */
 723                 if (state != FBINFO_STATE_RUNNING)
 724                         flush_work(&dev_priv->fbdev_suspend_work);
 725                 console_lock();
 726         } else {
 727                 /*
 728                  * The console lock can be pretty contented on resume due
 729                  * to all the printk activity.  Try to keep it out of the hot
 730                  * path of resume if possible.
 731                  */
 732                 WARN_ON(state != FBINFO_STATE_RUNNING);
 733                 if (!console_trylock()) {
 734                         /* Don't block our own workqueue as this can
 735                          * be run in parallel with other i915.ko tasks.
 736                          */
 737                         schedule_work(&dev_priv->fbdev_suspend_work);
 738                         return;
 739                 }
 740         }
 741
 742         /* On resume from hibernation: If the object is shmemfs backed, it has
 743          * been restored from swap. If the object is stolen however, it will be
 744          * full of whatever garbage was left in there.
 745          */
 746         if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
 747                 memset_io(info->screen_base, 0, info->screen_size);
 748
 749         fb_set_suspend(info, state);
 750         console_unlock();
 751 }
 752
 753 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 754 {
 755         struct drm_i915_private *dev_priv = dev->dev_private;
 756         if (dev_priv->fbdev)
 757                 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 758 }
 759
 760 void intel_fbdev_restore_mode(struct drm_device *dev)
 761 {
 762         int ret;
 763         struct drm_i915_private *dev_priv = dev->dev_private;
 764
 765         if (!dev_priv->fbdev)
 766                 return;
 767
 768         ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper);
 769         if (ret)
 770                 DRM_DEBUG("failed to restore crtc mode\n");
 771 }