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 static int intel_fbdev_set_par(struct fb_info *info)
  45 {
  46         struct drm_fb_helper *fb_helper = info->par;
  47         struct intel_fbdev *ifbdev =
  48                 container_of(fb_helper, struct intel_fbdev, helper);
  49         int ret;
  50
  51         ret = drm_fb_helper_set_par(info);
  52
  53         if (ret == 0) {
  54                 mutex_lock(&fb_helper->dev->struct_mutex);
  55                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  56                 mutex_unlock(&fb_helper->dev->struct_mutex);
  57         }
  58
  59         return ret;
  60 }
  61
  62 static int intel_fbdev_blank(int blank, struct fb_info *info)
  63 {
  64         struct drm_fb_helper *fb_helper = info->par;
  65         struct intel_fbdev *ifbdev =
  66                 container_of(fb_helper, struct intel_fbdev, helper);
  67         int ret;
  68
  69         ret = drm_fb_helper_blank(blank, info);
  70
  71         if (ret == 0) {
  72                 mutex_lock(&fb_helper->dev->struct_mutex);
  73                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  74                 mutex_unlock(&fb_helper->dev->struct_mutex);
  75         }
  76
  77         return ret;
  78 }
  79
  80 #if 0
  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 #endif
 100
 101 static struct fb_ops intelfb_ops = {
 102 #if 0
 103         .owner = THIS_MODULE,
 104         .fb_check_var = drm_fb_helper_check_var,
 105 #endif
 106         .fb_set_par = intel_fbdev_set_par,
 107 #if 0
 108         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 109         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 110         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 111         .fb_pan_display = intel_fbdev_pan_display,
 112 #endif
 113         .fb_blank = intel_fbdev_blank,
 114 #if 0
 115         .fb_setcmap = drm_fb_helper_setcmap,
 116 #endif
 117         .fb_debug_enter = drm_fb_helper_debug_enter,
 118 #if 0
 119         .fb_debug_leave = drm_fb_helper_debug_leave,
 120 #endif
 121 };
 122
 123 static int intelfb_alloc(struct drm_fb_helper *helper,
 124                          struct drm_fb_helper_surface_size *sizes)
 125 {
 126         struct intel_fbdev *ifbdev =
 127                 container_of(helper, struct intel_fbdev, helper);
 128         struct drm_framebuffer *fb;
 129         struct drm_device *dev = helper->dev;
 130         struct drm_i915_private *dev_priv = to_i915(dev);
 131         struct drm_mode_fb_cmd2 mode_cmd = {};
 132         struct drm_i915_gem_object *obj = NULL;
 133         int size, ret;
 134
 135         /* we don't do packed 24bpp */
 136         if (sizes->surface_bpp == 24)
 137                 sizes->surface_bpp = 32;
 138
 139         mode_cmd.width = sizes->surface_width;
 140         mode_cmd.height = sizes->surface_height;
 141
 142         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
 143                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
 144         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 145                                                           sizes->surface_depth);
 146
 147         mutex_lock(&dev->struct_mutex);
 148
 149         size = mode_cmd.pitches[0] * mode_cmd.height;
 150         size = PAGE_ALIGN(size);
 151
 152         /* If the FB is too big, just don't use it since fbdev is not very
 153          * important and we should probably use that space with FBC or other
 154          * features. */
 155         if (size * 2 < dev_priv->gtt.stolen_usable_size)
 156                 obj = i915_gem_object_create_stolen(dev, size);
 157         if (obj == NULL)
 158                 obj = i915_gem_alloc_object(dev, size);
 159         if (!obj) {
 160                 DRM_ERROR("failed to allocate framebuffer\n");
 161                 ret = -ENOMEM;
 162                 goto out;
 163         }
 164
 165         fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
 166         if (IS_ERR(fb)) {
 167                 drm_gem_object_unreference(&obj->base);
 168                 ret = PTR_ERR(fb);
 169                 goto out;
 170         }
 171
 172         mutex_unlock(&dev->struct_mutex);
 173
 174         ifbdev->fb = to_intel_framebuffer(fb);
 175
 176         return 0;
 177
 178 out:
 179         mutex_unlock(&dev->struct_mutex);
 180         return ret;
 181 }
 182
 183 static int intelfb_create(struct drm_fb_helper *helper,
 184                           struct drm_fb_helper_surface_size *sizes)
 185 {
 186         struct intel_fbdev *ifbdev =
 187                 container_of(helper, struct intel_fbdev, helper);
 188         struct intel_framebuffer *intel_fb = ifbdev->fb;
 189         struct drm_device *dev = helper->dev;
 190         struct drm_i915_private *dev_priv = dev->dev_private;
 191         struct fb_info *info;
 192         struct drm_framebuffer *fb;
 193         struct drm_i915_gem_object *obj;
 194         device_t vga_dev;
 195         int size, ret;
 196         bool prealloc = false;
 197
 198         if (intel_fb &&
 199             (sizes->fb_width > intel_fb->base.width ||
 200              sizes->fb_height > intel_fb->base.height)) {
 201                 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
 202                               " releasing it\n",
 203                               intel_fb->base.width, intel_fb->base.height,
 204                               sizes->fb_width, sizes->fb_height);
 205                 drm_framebuffer_unreference(&intel_fb->base);
 206                 intel_fb = ifbdev->fb = NULL;
 207         }
 208         if (!intel_fb || WARN_ON(!intel_fb->obj)) {
 209                 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
 210                 ret = intelfb_alloc(helper, sizes);
 211                 if (ret)
 212                         return ret;
 213                 intel_fb = ifbdev->fb;
 214         } else {
 215                 DRM_DEBUG_KMS("re-using BIOS fb\n");
 216                 prealloc = true;
 217                 sizes->fb_width = intel_fb->base.width;
 218                 sizes->fb_height = intel_fb->base.height;
 219         }
 220
 221         obj = intel_fb->obj;
 222         size = obj->base.size;
 223
 224         mutex_lock(&dev->struct_mutex);
 225
 226         /* Pin the GGTT vma for our access via info->screen_base.
 227          * This also validates that any existing fb inherited from the
 228          * BIOS is suitable for own access.
 229          */
 230         ret = intel_pin_and_fence_fb_obj(NULL, &ifbdev->fb->base, NULL);
 231         if (ret)
 232                 goto out_unlock;
 233
 234         info = drm_fb_helper_alloc_fbi(helper);
 235         if (IS_ERR(info)) {
 236                 DRM_ERROR("Failed to allocate fb_info\n");
 237                 ret = PTR_ERR(info);
 238                 goto out_unpin;
 239         }
 240
 241         info->par = helper;
 242
 243         fb = &ifbdev->fb->base;
 244
 245         ifbdev->helper.fb = fb;
 246
 247 #ifdef __DragonFly__
 248         vga_dev = device_get_parent(dev->dev->bsddev);
 249         info->width = sizes->fb_width;
 250         info->height = sizes->fb_height;
 251         info->stride = fb->pitches[0];
 252         info->depth = sizes->surface_bpp;
 253         info->paddr = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj);
 254         info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev);
 255         info->vaddr = (vm_offset_t)pmap_mapdev_attr(info->paddr, size,
 256                 VM_MEMATTR_WRITE_COMBINING);
 257         info->fbops = intelfb_ops;
 258 #else
 259         strcpy(info->fix.id, "inteldrmfb");
 260
 261         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 262         info->fbops = &intelfb_ops;
 263
 264         /* setup aperture base/size for vesafb takeover */
 265         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 266         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 267
 268         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
 269         info->fix.smem_len = size;
 270
 271         info->screen_base =
 272                 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
 273                            size);
 274         if (!info->screen_base) {
 275                 DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
 276                 ret = -ENOSPC;
 277                 goto out_destroy_fbi;
 278         }
 279         info->screen_size = size;
 280
 281         /* This driver doesn't need a VT switch to restore the mode on resume */
 282         info->skip_vt_switch = true;
 283
 284         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 285         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 286
 287         /* If the object is shmemfs backed, it will have given us zeroed pages.
 288          * If the object is stolen however, it will be full of whatever
 289          * garbage was left in there.
 290          */
 291         if (ifbdev->fb->obj->stolen && !prealloc)
 292                 memset_io(info->screen_base, 0, info->screen_size);
 293
 294         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 295 #endif
 296
 297         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
 298                       fb->width, fb->height,
 299                       i915_gem_obj_ggtt_offset(obj), obj);
 300
 301         mutex_unlock(&dev->struct_mutex);
 302 #if 0
 303         vga_switcheroo_client_fb_set(dev->pdev, info);
 304 #endif
 305         return 0;
 306
 307 #if 0
 308 out_destroy_fbi:
 309         drm_fb_helper_release_fbi(helper);
 310 #endif
 311 out_unpin:
 312         i915_gem_object_ggtt_unpin(obj);
 313 out_unlock:
 314         mutex_unlock(&dev->struct_mutex);
 315         return ret;
 316 }
 317
 318 /** Sets the color ramps on behalf of RandR */
 319 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 320                                     u16 blue, int regno)
 321 {
 322         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 323
 324         intel_crtc->lut_r[regno] = red >> 8;
 325         intel_crtc->lut_g[regno] = green >> 8;
 326         intel_crtc->lut_b[regno] = blue >> 8;
 327 }
 328
 329 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 330                                     u16 *blue, int regno)
 331 {
 332         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 333
 334         *red = intel_crtc->lut_r[regno] << 8;
 335         *green = intel_crtc->lut_g[regno] << 8;
 336         *blue = intel_crtc->lut_b[regno] << 8;
 337 }
 338
 339 static struct drm_fb_helper_crtc *
 340 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
 341 {
 342         int i;
 343
 344         for (i = 0; i < fb_helper->crtc_count; i++)
 345                 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
 346                         return &fb_helper->crtc_info[i];
 347
 348         return NULL;
 349 }
 350
 351 /*
 352  * Try to read the BIOS display configuration and use it for the initial
 353  * fb configuration.
 354  *
 355  * The BIOS or boot loader will generally create an initial display
 356  * configuration for us that includes some set of active pipes and displays.
 357  * This routine tries to figure out which pipes and connectors are active
 358  * and stuffs them into the crtcs and modes array given to us by the
 359  * drm_fb_helper code.
 360  *
 361  * The overall sequence is:
 362  *   intel_fbdev_init - from driver load
 363  *     intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
 364  *     drm_fb_helper_init - build fb helper structs
 365  *     drm_fb_helper_single_add_all_connectors - more fb helper structs
 366  *   intel_fbdev_initial_config - apply the config
 367  *     drm_fb_helper_initial_config - call ->probe then register_framebuffer()
 368  *         drm_setup_crtcs - build crtc config for fbdev
 369  *           intel_fb_initial_config - find active connectors etc
 370  *         drm_fb_helper_single_fb_probe - set up fbdev
 371  *           intelfb_create - re-use or alloc fb, build out fbdev structs
 372  *
 373  * Note that we don't make special consideration whether we could actually
 374  * switch to the selected modes without a full modeset. E.g. when the display
 375  * is in VGA mode we need to recalculate watermarks and set a new high-res
 376  * framebuffer anyway.
 377  */
 378 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
 379                                     struct drm_fb_helper_crtc **crtcs,
 380                                     struct drm_display_mode **modes,
 381                                     struct drm_fb_offset *offsets,
 382                                     bool *enabled, int width, int height)
 383 {
 384         struct drm_device *dev = fb_helper->dev;
 385         int i, j;
 386         bool *save_enabled;
 387         bool fallback = true;
 388         int num_connectors_enabled = 0;
 389         int num_connectors_detected = 0;
 390         uint64_t conn_configured = 0, mask;
 391         int pass = 0;
 392
 393         save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
 394                                GFP_KERNEL);
 395         if (!save_enabled)
 396                 return false;
 397
 398         memcpy(save_enabled, enabled, dev->mode_config.num_connector);
 399         mask = (1 << fb_helper->connector_count) - 1;
 400 retry:
 401         for (i = 0; i < fb_helper->connector_count; i++) {
 402                 struct drm_fb_helper_connector *fb_conn;
 403                 struct drm_connector *connector;
 404                 struct drm_encoder *encoder;
 405                 struct drm_fb_helper_crtc *new_crtc;
 406
 407                 fb_conn = fb_helper->connector_info[i];
 408                 connector = fb_conn->connector;
 409
 410                 if (conn_configured & (1 << i))
 411                         continue;
 412
 413                 if (pass == 0 && !connector->has_tile)
 414                         continue;
 415
 416                 if (connector->status == connector_status_connected)
 417                         num_connectors_detected++;
 418
 419                 if (!enabled[i]) {
 420                         DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
 421                                       connector->name);
 422                         conn_configured |= (1 << i);
 423                         continue;
 424                 }
 425
 426                 if (connector->force == DRM_FORCE_OFF) {
 427                         DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
 428                                       connector->name);
 429                         enabled[i] = false;
 430                         continue;
 431                 }
 432
 433                 encoder = connector->state->best_encoder;
 434                 if (!encoder || WARN_ON(!connector->state->crtc)) {
 435                         if (connector->force > DRM_FORCE_OFF)
 436                                 goto bail;
 437
 438                         DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
 439                                       connector->name);
 440                         enabled[i] = false;
 441                         conn_configured |= (1 << i);
 442                         continue;
 443                 }
 444
 445                 num_connectors_enabled++;
 446
 447                 new_crtc = intel_fb_helper_crtc(fb_helper, connector->state->crtc);
 448
 449                 /*
 450                  * Make sure we're not trying to drive multiple connectors
 451                  * with a single CRTC, since our cloning support may not
 452                  * match the BIOS.
 453                  */
 454                 for (j = 0; j < fb_helper->connector_count; j++) {
 455                         if (crtcs[j] == new_crtc) {
 456                                 DRM_DEBUG_KMS("fallback: cloned configuration\n");
 457                                 goto bail;
 458                         }
 459                 }
 460
 461                 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
 462                               connector->name);
 463
 464                 /* go for command line mode first */
 465                 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
 466
 467                 /* try for preferred next */
 468                 if (!modes[i]) {
 469                         DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
 470                                       connector->name, connector->has_tile);
 471                         modes[i] = drm_has_preferred_mode(fb_conn, width,
 472                                                           height);
 473                 }
 474
 475                 /* No preferred mode marked by the EDID? Are there any modes? */
 476                 if (!modes[i] && !list_empty(&connector->modes)) {
 477                         DRM_DEBUG_KMS("using first mode listed on connector %s\n",
 478                                       connector->name);
 479                         modes[i] = list_first_entry(&connector->modes,
 480                                                     struct drm_display_mode,
 481                                                     head);
 482                 }
 483
 484                 /* last resort: use current mode */
 485                 if (!modes[i]) {
 486                         /*
 487                          * IMPORTANT: We want to use the adjusted mode (i.e.
 488                          * after the panel fitter upscaling) as the initial
 489                          * config, not the input mode, which is what crtc->mode
 490                          * usually contains. But since our current
 491                          * code puts a mode derived from the post-pfit timings
 492                          * into crtc->mode this works out correctly.
 493                          *
 494                          * This is crtc->mode and not crtc->state->mode for the
 495                          * fastboot check to work correctly. crtc_state->mode has
 496                          * I915_MODE_FLAG_INHERITED, which we clear to force check
 497                          * state.
 498                          */
 499                         DRM_DEBUG_KMS("looking for current mode on connector %s\n",
 500                                       connector->name);
 501                         modes[i] = &connector->state->crtc->mode;
 502                 }
 503                 crtcs[i] = new_crtc;
 504
 505                 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
 506                               connector->name,
 507                               pipe_name(to_intel_crtc(connector->state->crtc)->pipe),
 508                               connector->state->crtc->base.id,
 509                               modes[i]->hdisplay, modes[i]->vdisplay,
 510                               modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
 511
 512                 fallback = false;
 513                 conn_configured |= (1 << i);
 514         }
 515
 516         if ((conn_configured & mask) != mask) {
 517                 pass++;
 518                 goto retry;
 519         }
 520
 521         /*
 522          * If the BIOS didn't enable everything it could, fall back to have the
 523          * same user experiencing of lighting up as much as possible like the
 524          * fbdev helper library.
 525          */
 526         if (num_connectors_enabled != num_connectors_detected &&
 527             num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
 528                 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
 529                 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
 530                               num_connectors_detected);
 531                 fallback = true;
 532         }
 533
 534         if (fallback) {
 535 bail:
 536                 DRM_DEBUG_KMS("Not using firmware configuration\n");
 537                 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
 538                 kfree(save_enabled);
 539                 return false;
 540         }
 541
 542         kfree(save_enabled);
 543         return true;
 544 }
 545
 546 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 547         .initial_config = intel_fb_initial_config,
 548         .gamma_set = intel_crtc_fb_gamma_set,
 549         .gamma_get = intel_crtc_fb_gamma_get,
 550         .fb_probe = intelfb_create,
 551 };
 552
 553 static void intel_fbdev_destroy(struct drm_device *dev,
 554                                 struct intel_fbdev *ifbdev)
 555 {
 556         /* We rely on the object-free to release the VMA pinning for
 557          * the info->screen_base mmaping. Leaking the VMA is simpler than
 558          * trying to rectify all the possible error paths leading here.
 559          */
 560
 561         drm_fb_helper_unregister_fbi(&ifbdev->helper);
 562         drm_fb_helper_release_fbi(&ifbdev->helper);
 563
 564         drm_fb_helper_fini(&ifbdev->helper);
 565
 566         if (ifbdev->fb) {
 567                 drm_framebuffer_unregister_private(&ifbdev->fb->base);
 568                 drm_framebuffer_remove(&ifbdev->fb->base);
 569         }
 570 }
 571
 572 /*
 573  * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
 574  * The core display code will have read out the current plane configuration,
 575  * so we use that to figure out if there's an object for us to use as the
 576  * fb, and if so, we re-use it for the fbdev configuration.
 577  *
 578  * Note we only support a single fb shared across pipes for boot (mostly for
 579  * fbcon), so we just find the biggest and use that.
 580  */
 581 static bool intel_fbdev_init_bios(struct drm_device *dev,
 582                                  struct intel_fbdev *ifbdev)
 583 {
 584         struct intel_framebuffer *fb = NULL;
 585         struct drm_crtc *crtc;
 586         struct intel_crtc *intel_crtc;
 587         unsigned int max_size = 0;
 588
 589         /* Find the largest fb */
 590         for_each_crtc(dev, crtc) {
 591                 struct drm_i915_gem_object *obj =
 592                         intel_fb_obj(crtc->primary->state->fb);
 593                 intel_crtc = to_intel_crtc(crtc);
 594
 595                 if (!crtc->state->active || !obj) {
 596                         DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
 597                                       pipe_name(intel_crtc->pipe));
 598                         continue;
 599                 }
 600
 601                 if (obj->base.size > max_size) {
 602                         DRM_DEBUG_KMS("found possible fb from plane %c\n",
 603                                       pipe_name(intel_crtc->pipe));
 604                         fb = to_intel_framebuffer(crtc->primary->state->fb);
 605                         max_size = obj->base.size;
 606                 }
 607         }
 608
 609         if (!fb) {
 610                 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
 611                 goto out;
 612         }
 613
 614         /* Now make sure all the pipes will fit into it */
 615         for_each_crtc(dev, crtc) {
 616                 unsigned int cur_size;
 617
 618                 intel_crtc = to_intel_crtc(crtc);
 619
 620                 if (!crtc->state->active) {
 621                         DRM_DEBUG_KMS("pipe %c not active, skipping\n",
 622                                       pipe_name(intel_crtc->pipe));
 623                         continue;
 624                 }
 625
 626                 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
 627                               pipe_name(intel_crtc->pipe));
 628
 629                 /*
 630                  * See if the plane fb we found above will fit on this
 631                  * pipe.  Note we need to use the selected fb's pitch and bpp
 632                  * rather than the current pipe's, since they differ.
 633                  */
 634                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
 635                 cur_size = cur_size * fb->base.bits_per_pixel / 8;
 636                 if (fb->base.pitches[0] < cur_size) {
 637                         DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
 638                                       pipe_name(intel_crtc->pipe),
 639                                       cur_size, fb->base.pitches[0]);
 640                         fb = NULL;
 641                         break;
 642                 }
 643
 644                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
 645                 cur_size = intel_fb_align_height(dev, cur_size,
 646                                                  fb->base.pixel_format,
 647                                                  fb->base.modifier[0]);
 648                 cur_size *= fb->base.pitches[0];
 649                 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
 650                               pipe_name(intel_crtc->pipe),
 651                               intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
 652                               intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
 653                               fb->base.bits_per_pixel,
 654                               cur_size);
 655
 656                 if (cur_size > max_size) {
 657                         DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
 658                                       pipe_name(intel_crtc->pipe),
 659                                       cur_size, max_size);
 660                         fb = NULL;
 661                         break;
 662                 }
 663
 664                 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
 665                               pipe_name(intel_crtc->pipe),
 666                               max_size, cur_size);
 667         }
 668
 669         if (!fb) {
 670                 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
 671                 goto out;
 672         }
 673
 674         ifbdev->preferred_bpp = fb->base.bits_per_pixel;
 675         ifbdev->fb = fb;
 676
 677         drm_framebuffer_reference(&ifbdev->fb->base);
 678
 679         /* Final pass to check if any active pipes don't have fbs */
 680         for_each_crtc(dev, crtc) {
 681                 intel_crtc = to_intel_crtc(crtc);
 682
 683                 if (!crtc->state->active)
 684                         continue;
 685
 686                 WARN(!crtc->primary->fb,
 687                      "re-used BIOS config but lost an fb on crtc %d\n",
 688                      crtc->base.id);
 689         }
 690
 691
 692         DRM_DEBUG_KMS("using BIOS fb for initial console\n");
 693         return true;
 694
 695 out:
 696
 697         return false;
 698 }
 699
 700 static void intel_fbdev_suspend_worker(struct work_struct *work)
 701 {
 702         intel_fbdev_set_suspend(container_of(work,
 703                                              struct drm_i915_private,
 704                                              fbdev_suspend_work)->dev,
 705                                 FBINFO_STATE_RUNNING,
 706                                 true);
 707 }
 708
 709 int intel_fbdev_init(struct drm_device *dev)
 710 {
 711         struct intel_fbdev *ifbdev;
 712         struct drm_i915_private *dev_priv = dev->dev_private;
 713         int ret;
 714
 715         if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
 716                 return -ENODEV;
 717
 718         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 719         if (ifbdev == NULL)
 720                 return -ENOMEM;
 721
 722         drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
 723
 724         if (!intel_fbdev_init_bios(dev, ifbdev))
 725                 ifbdev->preferred_bpp = 32;
 726
 727         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 728                                  INTEL_INFO(dev)->num_pipes, 4);
 729         if (ret) {
 730                 kfree(ifbdev);
 731                 return ret;
 732         }
 733
 734         ifbdev->helper.atomic = true;
 735
 736         dev_priv->fbdev = ifbdev;
 737         INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
 738
 739         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 740
 741         return 0;
 742 }
 743
 744 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
 745 {
 746         struct drm_i915_private *dev_priv = data;
 747         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 748
 749         /* Due to peculiar init order wrt to hpd handling this is separate. */
 750         if (drm_fb_helper_initial_config(&ifbdev->helper,
 751                                          ifbdev->preferred_bpp))
 752                 intel_fbdev_fini(dev_priv->dev);
 753 }
 754
 755 void intel_fbdev_initial_config_async(struct drm_device *dev)
 756 {
 757         async_schedule(intel_fbdev_initial_config, to_i915(dev));
 758 }
 759
 760 void intel_fbdev_fini(struct drm_device *dev)
 761 {
 762         struct drm_i915_private *dev_priv = dev->dev_private;
 763         if (!dev_priv->fbdev)
 764                 return;
 765
 766 #if 0
 767         flush_work(&dev_priv->fbdev_suspend_work);
 768
 769         if (!current_is_async())
 770 #endif
 771                 async_synchronize_full();
 772         intel_fbdev_destroy(dev, dev_priv->fbdev);
 773         kfree(dev_priv->fbdev);
 774         dev_priv->fbdev = NULL;
 775 }
 776
 777 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
 778 {
 779 #if 0
 780         struct drm_i915_private *dev_priv = dev->dev_private;
 781         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 782         struct fb_info *info;
 783
 784         if (!ifbdev)
 785                 return;
 786
 787         info = ifbdev->helper.fbdev;
 788
 789         if (synchronous) {
 790                 /* Flush any pending work to turn the console on, and then
 791                  * wait to turn it off. It must be synchronous as we are
 792                  * about to suspend or unload the driver.
 793                  *
 794                  * Note that from within the work-handler, we cannot flush
 795                  * ourselves, so only flush outstanding work upon suspend!
 796                  */
 797                 if (state != FBINFO_STATE_RUNNING)
 798                         flush_work(&dev_priv->fbdev_suspend_work);
 799                 console_lock();
 800         } else {
 801                 /*
 802                  * The console lock can be pretty contented on resume due
 803                  * to all the printk activity.  Try to keep it out of the hot
 804                  * path of resume if possible.
 805                  */
 806                 WARN_ON(state != FBINFO_STATE_RUNNING);
 807                 if (!console_trylock()) {
 808                         /* Don't block our own workqueue as this can
 809                          * be run in parallel with other i915.ko tasks.
 810                          */
 811                         schedule_work(&dev_priv->fbdev_suspend_work);
 812                         return;
 813                 }
 814         }
 815
 816         /* On resume from hibernation: If the object is shmemfs backed, it has
 817          * been restored from swap. If the object is stolen however, it will be
 818          * full of whatever garbage was left in there.
 819          */
 820         if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
 821                 memset_io(info->screen_base, 0, info->screen_size);
 822
 823         drm_fb_helper_set_suspend(&ifbdev->helper, state);
 824         console_unlock();
 825 #endif
 826 }
 827
 828 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 829 {
 830         struct drm_i915_private *dev_priv = dev->dev_private;
 831         if (dev_priv->fbdev)
 832                 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 833 }
 834
 835 void intel_fbdev_restore_mode(struct drm_device *dev)
 836 {
 837         int ret;
 838         struct drm_i915_private *dev_priv = dev->dev_private;
 839         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 840         struct drm_fb_helper *fb_helper;
 841
 842         if (!ifbdev)
 843                 return;
 844
 845         fb_helper = &ifbdev->helper;
 846
 847         /* XXX: avoid dead-locking the Xorg on exit */
 848         if (mutex_is_locked(&dev->mode_config.mutex)) {
 849                 DRM_ERROR("fubar while trying to restore kms_console\n");
 850                 return; /* drm_modeset_unlock_all(dev) ? */
 851         }
 852
 853         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 854         if (ret) {
 855                 DRM_DEBUG("failed to restore crtc mode\n");
 856         } else {
 857                 mutex_lock(&fb_helper->dev->struct_mutex);
 858                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
 859                 mutex_unlock(&fb_helper->dev->struct_mutex);
 860         }
 861 }