sys/dev/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 <drm/drmP.h>
  28 #include <linux/async.h>
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/errno.h>
  32 #include <linux/string.h>
  33 #include <linux/mm.h>
  34 #include <linux/delay.h>
  35 #include <linux/fb.h>
  36
  37 #include <drm/drmP.h>
  38 #include <drm/drm_crtc.h>
  39 #include <drm/drm_fb_helper.h>
  40 #include "intel_drv.h"
  41 #include <drm/i915_drm.h>
  42 #include "i915_drv.h"
  43
  44 #if 0
  45 static int intel_fbdev_set_par(struct fb_info *info)
  46 {
  47         struct drm_fb_helper *fb_helper = info->par;
  48         struct intel_fbdev *ifbdev =
  49                 container_of(fb_helper, struct intel_fbdev, helper);
  50         int ret;
  51
  52         ret = drm_fb_helper_set_par(info);
  53
  54         if (ret == 0) {
  55                 mutex_lock(&fb_helper->dev->struct_mutex);
  56                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  57                 mutex_unlock(&fb_helper->dev->struct_mutex);
  58         }
  59
  60         return ret;
  61 }
  62
  63 static int intel_fbdev_blank(int blank, struct fb_info *info)
  64 {
  65         struct drm_fb_helper *fb_helper = info->par;
  66         struct intel_fbdev *ifbdev =
  67                 container_of(fb_helper, struct intel_fbdev, helper);
  68         int ret;
  69
  70         ret = drm_fb_helper_blank(blank, info);
  71
  72         if (ret == 0) {
  73                 mutex_lock(&fb_helper->dev->struct_mutex);
  74                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  75                 mutex_unlock(&fb_helper->dev->struct_mutex);
  76         }
  77
  78         return ret;
  79 }
  80
  81 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
  82                                    struct fb_info *info)
  83 {
  84         struct drm_fb_helper *fb_helper = info->par;
  85         struct intel_fbdev *ifbdev =
  86                 container_of(fb_helper, struct intel_fbdev, helper);
  87
  88         int ret;
  89         ret = drm_fb_helper_pan_display(var, info);
  90
  91         if (ret == 0) {
  92                 mutex_lock(&fb_helper->dev->struct_mutex);
  93                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  94                 mutex_unlock(&fb_helper->dev->struct_mutex);
  95         }
  96
  97         return ret;
  98 }
  99
 100 static struct fb_ops intelfb_ops = {
 101         .owner = THIS_MODULE,
 102         .fb_check_var = drm_fb_helper_check_var,
 103         .fb_set_par = intel_fbdev_set_par,
 104         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 105         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 106         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 107         .fb_pan_display = intel_fbdev_pan_display,
 108         .fb_blank = intel_fbdev_blank,
 109         .fb_setcmap = drm_fb_helper_setcmap,
 110         .fb_debug_enter = drm_fb_helper_debug_enter,
 111         .fb_debug_leave = drm_fb_helper_debug_leave,
 112 };
 113 #endif
 114
 115 static int intelfb_alloc(struct drm_fb_helper *helper,
 116                          struct drm_fb_helper_surface_size *sizes)
 117 {
 118         struct intel_fbdev *ifbdev =
 119                 container_of(helper, struct intel_fbdev, helper);
 120         struct drm_framebuffer *fb;
 121         struct drm_device *dev = helper->dev;
 122         struct drm_mode_fb_cmd2 mode_cmd = {};
 123         struct drm_i915_gem_object *obj;
 124         int size, ret;
 125
 126         /* we don't do packed 24bpp */
 127         if (sizes->surface_bpp == 24)
 128                 sizes->surface_bpp = 32;
 129
 130         mode_cmd.width = sizes->surface_width;
 131         mode_cmd.height = sizes->surface_height;
 132
 133         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
 134                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
 135         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 136                                                           sizes->surface_depth);
 137
 138         size = mode_cmd.pitches[0] * mode_cmd.height;
 139         size = PAGE_ALIGN(size);
 140         obj = i915_gem_object_create_stolen(dev, size);
 141         if (obj == NULL)
 142                 obj = i915_gem_alloc_object(dev, size);
 143         if (!obj) {
 144                 DRM_ERROR("failed to allocate framebuffer\n");
 145                 ret = -ENOMEM;
 146                 goto out;
 147         }
 148
 149         fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
 150         if (IS_ERR(fb)) {
 151                 ret = PTR_ERR(fb);
 152                 goto out_unref;
 153         }
 154
 155         /* Flush everything out, we'll be doing GTT only from now on */
 156         ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL, NULL, NULL);
 157         if (ret) {
 158                 DRM_ERROR("failed to pin obj: %d\n", ret);
 159                 goto out_fb;
 160         }
 161
 162         ifbdev->fb = to_intel_framebuffer(fb);
 163
 164         return 0;
 165
 166 out_fb:
 167         drm_framebuffer_remove(fb);
 168 out_unref:
 169         drm_gem_object_unreference(&obj->base);
 170 out:
 171         return ret;
 172 }
 173
 174 static int intelfb_create(struct drm_fb_helper *helper,
 175                           struct drm_fb_helper_surface_size *sizes)
 176 {
 177         struct intel_fbdev *ifbdev =
 178                 container_of(helper, struct intel_fbdev, helper);
 179         struct intel_framebuffer *intel_fb = ifbdev->fb;
 180         struct drm_device *dev = helper->dev;
 181         struct drm_i915_private *dev_priv = dev->dev_private;
 182         struct fb_info *info;
 183         struct drm_framebuffer *fb;
 184         struct drm_i915_gem_object *obj;
 185         device_t vga_dev;
 186         int size, ret;
 187         bool prealloc = false;
 188
 189         mutex_lock(&dev->struct_mutex);
 190
 191         if (intel_fb &&
 192             (sizes->fb_width > intel_fb->base.width ||
 193              sizes->fb_height > intel_fb->base.height)) {
 194                 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
 195                               " releasing it\n",
 196                               intel_fb->base.width, intel_fb->base.height,
 197                               sizes->fb_width, sizes->fb_height);
 198                 drm_framebuffer_unreference(&intel_fb->base);
 199                 intel_fb = ifbdev->fb = NULL;
 200         }
 201         if (!intel_fb || WARN_ON(!intel_fb->obj)) {
 202                 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
 203                 ret = intelfb_alloc(helper, sizes);
 204                 if (ret)
 205                         goto out_unlock;
 206                 intel_fb = ifbdev->fb;
 207         } else {
 208                 DRM_DEBUG_KMS("re-using BIOS fb\n");
 209                 prealloc = true;
 210                 sizes->fb_width = intel_fb->base.width;
 211                 sizes->fb_height = intel_fb->base.height;
 212         }
 213
 214         obj = intel_fb->obj;
 215         size = obj->base.size;
 216
 217         info = drm_fb_helper_alloc_fbi(helper);
 218         if (IS_ERR(info)) {
 219                 ret = PTR_ERR(info);
 220                 goto out_unpin;
 221         }
 222
 223 #if 0
 224         info->par = helper;
 225 #endif
 226
 227         fb = &ifbdev->fb->base;
 228
 229         ifbdev->helper.fb = fb;
 230
 231 #ifdef __DragonFly__
 232         vga_dev = device_get_parent(dev->dev);
 233         info->width = sizes->fb_width;
 234         info->height = sizes->fb_height;
 235         info->stride = fb->pitches[0];
 236         info->depth = sizes->surface_bpp;
 237         info->paddr = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj);
 238         info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev);
 239         info->vaddr =
 240             (vm_offset_t)pmap_mapdev_attr(info->paddr,
 241                 sizes->surface_height * info->stride,
 242                 VM_MEMATTR_WRITE_COMBINING);
 243 #else
 244         strcpy(info->fix.id, "inteldrmfb");
 245
 246         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 247         info->fbops = &intelfb_ops;
 248
 249         /* setup aperture base/size for vesafb takeover */
 250         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 251         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 252
 253         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
 254         info->fix.smem_len = size;
 255
 256         info->screen_base =
 257                 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
 258                            size);
 259         if (!info->screen_base) {
 260                 ret = -ENOSPC;
 261                 goto out_destroy_fbi;
 262         }
 263         info->screen_size = size;
 264
 265         /* This driver doesn't need a VT switch to restore the mode on resume */
 266         info->skip_vt_switch = true;
 267
 268         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 269         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 270
 271         /* If the object is shmemfs backed, it will have given us zeroed pages.
 272          * If the object is stolen however, it will be full of whatever
 273          * garbage was left in there.
 274          */
 275         if (ifbdev->fb->obj->stolen && !prealloc)
 276                 memset_io(info->screen_base, 0, info->screen_size);
 277
 278         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 279 #endif
 280
 281         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
 282                       fb->width, fb->height,
 283                       i915_gem_obj_ggtt_offset(obj), obj);
 284
 285         mutex_unlock(&dev->struct_mutex);
 286 #if 0
 287         vga_switcheroo_client_fb_set(dev->pdev, info);
 288 #endif
 289         return 0;
 290
 291 #if 0
 292 out_destroy_fbi:
 293         drm_fb_helper_release_fbi(helper);
 294 #endif
 295 out_unpin:
 296         i915_gem_object_ggtt_unpin(obj);
 297         drm_gem_object_unreference(&obj->base);
 298 out_unlock:
 299         mutex_unlock(&dev->struct_mutex);
 300         return ret;
 301 }
 302
 303 /** Sets the color ramps on behalf of RandR */
 304 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 305                                     u16 blue, int regno)
 306 {
 307         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 308
 309         intel_crtc->lut_r[regno] = red >> 8;
 310         intel_crtc->lut_g[regno] = green >> 8;
 311         intel_crtc->lut_b[regno] = blue >> 8;
 312 }
 313
 314 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 315                                     u16 *blue, int regno)
 316 {
 317         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 318
 319         *red = intel_crtc->lut_r[regno] << 8;
 320         *green = intel_crtc->lut_g[regno] << 8;
 321         *blue = intel_crtc->lut_b[regno] << 8;
 322 }
 323
 324 static struct drm_fb_helper_crtc *
 325 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
 326 {
 327         int i;
 328
 329         for (i = 0; i < fb_helper->crtc_count; i++)
 330                 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
 331                         return &fb_helper->crtc_info[i];
 332
 333         return NULL;
 334 }
 335
 336 /*
 337  * Try to read the BIOS display configuration and use it for the initial
 338  * fb configuration.
 339  *
 340  * The BIOS or boot loader will generally create an initial display
 341  * configuration for us that includes some set of active pipes and displays.
 342  * This routine tries to figure out which pipes and connectors are active
 343  * and stuffs them into the crtcs and modes array given to us by the
 344  * drm_fb_helper code.
 345  *
 346  * The overall sequence is:
 347  *   intel_fbdev_init - from driver load
 348  *     intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
 349  *     drm_fb_helper_init - build fb helper structs
 350  *     drm_fb_helper_single_add_all_connectors - more fb helper structs
 351  *   intel_fbdev_initial_config - apply the config
 352  *     drm_fb_helper_initial_config - call ->probe then register_framebuffer()
 353  *         drm_setup_crtcs - build crtc config for fbdev
 354  *           intel_fb_initial_config - find active connectors etc
 355  *         drm_fb_helper_single_fb_probe - set up fbdev
 356  *           intelfb_create - re-use or alloc fb, build out fbdev structs
 357  *
 358  * Note that we don't make special consideration whether we could actually
 359  * switch to the selected modes without a full modeset. E.g. when the display
 360  * is in VGA mode we need to recalculate watermarks and set a new high-res
 361  * framebuffer anyway.
 362  */
 363 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
 364                                     struct drm_fb_helper_crtc **crtcs,
 365                                     struct drm_display_mode **modes,
 366                                     struct drm_fb_offset *offsets,
 367                                     bool *enabled, int width, int height)
 368 {
 369         struct drm_device *dev = fb_helper->dev;
 370         int i, j;
 371         bool *save_enabled;
 372         bool fallback = true;
 373         int num_connectors_enabled = 0;
 374         int num_connectors_detected = 0;
 375         uint64_t conn_configured = 0, mask;
 376         int pass = 0;
 377
 378         save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
 379                                GFP_KERNEL);
 380         if (!save_enabled)
 381                 return false;
 382
 383         memcpy(save_enabled, enabled, dev->mode_config.num_connector);
 384         mask = (1 << fb_helper->connector_count) - 1;
 385 retry:
 386         for (i = 0; i < fb_helper->connector_count; i++) {
 387                 struct drm_fb_helper_connector *fb_conn;
 388                 struct drm_connector *connector;
 389                 struct drm_encoder *encoder;
 390                 struct drm_fb_helper_crtc *new_crtc;
 391
 392                 fb_conn = fb_helper->connector_info[i];
 393                 connector = fb_conn->connector;
 394
 395                 if (conn_configured & (1 << i))
 396                         continue;
 397
 398                 if (pass == 0 && !connector->has_tile)
 399                         continue;
 400
 401                 if (connector->status == connector_status_connected)
 402                         num_connectors_detected++;
 403
 404                 if (!enabled[i]) {
 405                         DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
 406                                       connector->name);
 407                         conn_configured |= (1 << i);
 408                         continue;
 409                 }
 410
 411                 if (connector->force == DRM_FORCE_OFF) {
 412                         DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
 413                                       connector->name);
 414                         enabled[i] = false;
 415                         continue;
 416                 }
 417
 418                 encoder = connector->encoder;
 419                 if (!encoder || WARN_ON(!encoder->crtc)) {
 420                         if (connector->force > DRM_FORCE_OFF)
 421                                 goto bail;
 422
 423                         DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
 424                                       connector->name);
 425                         enabled[i] = false;
 426                         conn_configured |= (1 << i);
 427                         continue;
 428                 }
 429
 430                 num_connectors_enabled++;
 431
 432                 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
 433
 434                 /*
 435                  * Make sure we're not trying to drive multiple connectors
 436                  * with a single CRTC, since our cloning support may not
 437                  * match the BIOS.
 438                  */
 439                 for (j = 0; j < fb_helper->connector_count; j++) {
 440                         if (crtcs[j] == new_crtc) {
 441                                 DRM_DEBUG_KMS("fallback: cloned configuration\n");
 442                                 goto bail;
 443                         }
 444                 }
 445
 446                 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
 447                               connector->name);
 448
 449                 /* go for command line mode first */
 450                 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
 451
 452                 /* try for preferred next */
 453                 if (!modes[i]) {
 454                         DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
 455                                       connector->name, connector->has_tile);
 456                         modes[i] = drm_has_preferred_mode(fb_conn, width,
 457                                                           height);
 458                 }
 459
 460                 /* No preferred mode marked by the EDID? Are there any modes? */
 461                 if (!modes[i] && !list_empty(&connector->modes)) {
 462                         DRM_DEBUG_KMS("using first mode listed on connector %s\n",
 463                                       connector->name);
 464                         modes[i] = list_first_entry(&connector->modes,
 465                                                     struct drm_display_mode,
 466                                                     head);
 467                 }
 468
 469                 /* last resort: use current mode */
 470                 if (!modes[i]) {
 471                         /*
 472                          * IMPORTANT: We want to use the adjusted mode (i.e.
 473                          * after the panel fitter upscaling) as the initial
 474                          * config, not the input mode, which is what crtc->mode
 475                          * usually contains. But since our current
 476                          * code puts a mode derived from the post-pfit timings
 477                          * into crtc->mode this works out correctly.
 478                          */
 479                         DRM_DEBUG_KMS("looking for current mode on connector %s\n",
 480                                       connector->name);
 481                         modes[i] = &encoder->crtc->mode;
 482                 }
 483                 crtcs[i] = new_crtc;
 484
 485                 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
 486                               connector->name,
 487                               pipe_name(to_intel_crtc(encoder->crtc)->pipe),
 488                               encoder->crtc->base.id,
 489                               modes[i]->hdisplay, modes[i]->vdisplay,
 490                               modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
 491
 492                 fallback = false;
 493                 conn_configured |= (1 << i);
 494         }
 495
 496         if ((conn_configured & mask) != mask) {
 497                 pass++;
 498                 goto retry;
 499         }
 500
 501         /*
 502          * If the BIOS didn't enable everything it could, fall back to have the
 503          * same user experiencing of lighting up as much as possible like the
 504          * fbdev helper library.
 505          */
 506         if (num_connectors_enabled != num_connectors_detected &&
 507             num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
 508                 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
 509                 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
 510                               num_connectors_detected);
 511                 fallback = true;
 512         }
 513
 514         if (fallback) {
 515 bail:
 516                 DRM_DEBUG_KMS("Not using firmware configuration\n");
 517                 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
 518                 kfree(save_enabled);
 519                 return false;
 520         }
 521
 522         kfree(save_enabled);
 523         return true;
 524 }
 525
 526 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 527         .initial_config = intel_fb_initial_config,
 528         .gamma_set = intel_crtc_fb_gamma_set,
 529         .gamma_get = intel_crtc_fb_gamma_get,
 530         .fb_probe = intelfb_create,
 531 };
 532
 533 static void intel_fbdev_destroy(struct drm_device *dev,
 534                                 struct intel_fbdev *ifbdev)
 535 {
 536 #if 0
 537         drm_fb_helper_unregister_fbi(&ifbdev->helper);
 538         drm_fb_helper_release_fbi(&ifbdev->helper);
 539 #endif
 540
 541         drm_fb_helper_fini(&ifbdev->helper);
 542
 543         drm_framebuffer_unregister_private(&ifbdev->fb->base);
 544         drm_framebuffer_remove(&ifbdev->fb->base);
 545 }
 546
 547 /*
 548  * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
 549  * The core display code will have read out the current plane configuration,
 550  * so we use that to figure out if there's an object for us to use as the
 551  * fb, and if so, we re-use it for the fbdev configuration.
 552  *
 553  * Note we only support a single fb shared across pipes for boot (mostly for
 554  * fbcon), so we just find the biggest and use that.
 555  */
 556 static bool intel_fbdev_init_bios(struct drm_device *dev,
 557                                  struct intel_fbdev *ifbdev)
 558 {
 559         struct intel_framebuffer *fb = NULL;
 560         struct drm_crtc *crtc;
 561         struct intel_crtc *intel_crtc;
 562         unsigned int max_size = 0;
 563
 564         if (!i915.fastboot)
 565                 return false;
 566
 567         /* Find the largest fb */
 568         for_each_crtc(dev, crtc) {
 569                 struct drm_i915_gem_object *obj =
 570                         intel_fb_obj(crtc->primary->state->fb);
 571                 intel_crtc = to_intel_crtc(crtc);
 572
 573                 if (!intel_crtc->active || !obj) {
 574                         DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
 575                                       pipe_name(intel_crtc->pipe));
 576                         continue;
 577                 }
 578
 579                 if (obj->base.size > max_size) {
 580                         DRM_DEBUG_KMS("found possible fb from plane %c\n",
 581                                       pipe_name(intel_crtc->pipe));
 582                         fb = to_intel_framebuffer(crtc->primary->state->fb);
 583                         max_size = obj->base.size;
 584                 }
 585         }
 586
 587         if (!fb) {
 588                 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
 589                 goto out;
 590         }
 591
 592         /* Now make sure all the pipes will fit into it */
 593         for_each_crtc(dev, crtc) {
 594                 unsigned int cur_size;
 595
 596                 intel_crtc = to_intel_crtc(crtc);
 597
 598                 if (!intel_crtc->active) {
 599                         DRM_DEBUG_KMS("pipe %c not active, skipping\n",
 600                                       pipe_name(intel_crtc->pipe));
 601                         continue;
 602                 }
 603
 604                 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
 605                               pipe_name(intel_crtc->pipe));
 606
 607                 /*
 608                  * See if the plane fb we found above will fit on this
 609                  * pipe.  Note we need to use the selected fb's pitch and bpp
 610                  * rather than the current pipe's, since they differ.
 611                  */
 612                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
 613                 cur_size = cur_size * fb->base.bits_per_pixel / 8;
 614                 if (fb->base.pitches[0] < cur_size) {
 615                         DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
 616                                       pipe_name(intel_crtc->pipe),
 617                                       cur_size, fb->base.pitches[0]);
 618                         fb = NULL;
 619                         break;
 620                 }
 621
 622                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
 623                 cur_size = intel_fb_align_height(dev, cur_size,
 624                                                  fb->base.pixel_format,
 625                                                  fb->base.modifier[0]);
 626                 cur_size *= fb->base.pitches[0];
 627                 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
 628                               pipe_name(intel_crtc->pipe),
 629                               intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
 630                               intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
 631                               fb->base.bits_per_pixel,
 632                               cur_size);
 633
 634                 if (cur_size > max_size) {
 635                         DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
 636                                       pipe_name(intel_crtc->pipe),
 637                                       cur_size, max_size);
 638                         fb = NULL;
 639                         break;
 640                 }
 641
 642                 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
 643                               pipe_name(intel_crtc->pipe),
 644                               max_size, cur_size);
 645         }
 646
 647         if (!fb) {
 648                 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
 649                 goto out;
 650         }
 651
 652         ifbdev->preferred_bpp = fb->base.bits_per_pixel;
 653         ifbdev->fb = fb;
 654
 655         drm_framebuffer_reference(&ifbdev->fb->base);
 656
 657         /* Final pass to check if any active pipes don't have fbs */
 658         for_each_crtc(dev, crtc) {
 659                 intel_crtc = to_intel_crtc(crtc);
 660
 661                 if (!intel_crtc->active)
 662                         continue;
 663
 664                 WARN(!crtc->primary->fb,
 665                      "re-used BIOS config but lost an fb on crtc %d\n",
 666                      crtc->base.id);
 667         }
 668
 669
 670         DRM_DEBUG_KMS("using BIOS fb for initial console\n");
 671         return true;
 672
 673 out:
 674
 675         return false;
 676 }
 677
 678 static void intel_fbdev_suspend_worker(struct work_struct *work)
 679 {
 680         intel_fbdev_set_suspend(container_of(work,
 681                                              struct drm_i915_private,
 682                                              fbdev_suspend_work)->dev,
 683                                 FBINFO_STATE_RUNNING,
 684                                 true);
 685 }
 686
 687 int intel_fbdev_init(struct drm_device *dev)
 688 {
 689         struct intel_fbdev *ifbdev;
 690         struct drm_i915_private *dev_priv = dev->dev_private;
 691         int ret;
 692
 693         if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
 694                 return -ENODEV;
 695
 696         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 697         if (ifbdev == NULL)
 698                 return -ENOMEM;
 699
 700         drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
 701
 702         if (!intel_fbdev_init_bios(dev, ifbdev))
 703                 ifbdev->preferred_bpp = 32;
 704
 705         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 706                                  INTEL_INFO(dev)->num_pipes, 4);
 707         if (ret) {
 708                 kfree(ifbdev);
 709                 return ret;
 710         }
 711
 712         dev_priv->fbdev = ifbdev;
 713         INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
 714
 715         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 716
 717         return 0;
 718 }
 719
 720 void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
 721 {
 722         struct drm_i915_private *dev_priv = data;
 723         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 724
 725         /* Due to peculiar init order wrt to hpd handling this is separate. */
 726         drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
 727 }
 728
 729 void intel_fbdev_fini(struct drm_device *dev)
 730 {
 731         struct drm_i915_private *dev_priv = dev->dev_private;
 732         if (!dev_priv->fbdev)
 733                 return;
 734
 735 #if 0
 736         flush_work(&dev_priv->fbdev_suspend_work);
 737 #endif
 738
 739         async_synchronize_full();
 740         intel_fbdev_destroy(dev, dev_priv->fbdev);
 741         kfree(dev_priv->fbdev);
 742         dev_priv->fbdev = NULL;
 743 }
 744
 745 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
 746 {
 747 #if 0
 748         struct drm_i915_private *dev_priv = dev->dev_private;
 749         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 750         struct fb_info *info;
 751
 752         if (!ifbdev)
 753                 return;
 754
 755         info = ifbdev->helper.fbdev;
 756
 757         if (synchronous) {
 758                 /* Flush any pending work to turn the console on, and then
 759                  * wait to turn it off. It must be synchronous as we are
 760                  * about to suspend or unload the driver.
 761                  *
 762                  * Note that from within the work-handler, we cannot flush
 763                  * ourselves, so only flush outstanding work upon suspend!
 764                  */
 765                 if (state != FBINFO_STATE_RUNNING)
 766                         flush_work(&dev_priv->fbdev_suspend_work);
 767                 console_lock();
 768         } else {
 769                 /*
 770                  * The console lock can be pretty contented on resume due
 771                  * to all the printk activity.  Try to keep it out of the hot
 772                  * path of resume if possible.
 773                  */
 774                 WARN_ON(state != FBINFO_STATE_RUNNING);
 775                 if (!console_trylock()) {
 776                         /* Don't block our own workqueue as this can
 777                          * be run in parallel with other i915.ko tasks.
 778                          */
 779                         schedule_work(&dev_priv->fbdev_suspend_work);
 780                         return;
 781                 }
 782         }
 783
 784         /* On resume from hibernation: If the object is shmemfs backed, it has
 785          * been restored from swap. If the object is stolen however, it will be
 786          * full of whatever garbage was left in there.
 787          */
 788         if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
 789                 memset_io(info->screen_base, 0, info->screen_size);
 790
 791         drm_fb_helper_set_suspend(&ifbdev->helper, state);
 792         console_unlock();
 793 #endif
 794 }
 795
 796 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 797 {
 798         struct drm_i915_private *dev_priv = dev->dev_private;
 799         if (dev_priv->fbdev)
 800                 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 801 }
 802
 803 void intel_fbdev_restore_mode(struct drm_device *dev)
 804 {
 805         int ret;
 806         struct drm_i915_private *dev_priv = dev->dev_private;
 807         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 808         struct drm_fb_helper *fb_helper;
 809
 810         if (!ifbdev)
 811                 return;
 812
 813         fb_helper = &ifbdev->helper;
 814
 815         /* XXX: avoid dead-locking the Xorg on exit */
 816         if (mutex_is_locked(&dev->mode_config.mutex)) {
 817                 DRM_ERROR("fubar while trying to restore kms_console\n");
 818                 return; /* drm_modeset_unlock_all(dev) ? */
 819         }
 820
 821         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 822         if (ret) {
 823                 DRM_DEBUG("failed to restore crtc mode\n");
 824         } else {
 825                 mutex_lock(&fb_helper->dev->struct_mutex);
 826                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
 827                 mutex_unlock(&fb_helper->dev->struct_mutex);
 828         }
 829 }