kernel/drivers/gpu/drm/omapdrm/omap_drv.c

   1 /*
   2  * drivers/gpu/drm/omapdrm/omap_drv.c
   3  *
   4  * Copyright (C) 2011 Texas Instruments
   5  * Author: Rob Clark <rob@ti.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <linux/wait.h>
  21
  22 #include <drm/drm_atomic.h>
  23 #include <drm/drm_atomic_helper.h>
  24 #include <drm/drm_crtc_helper.h>
  25 #include <drm/drm_fb_helper.h>
  26
  27 #include "omap_dmm_tiler.h"
  28 #include "omap_drv.h"
  29
  30 #define DRIVER_NAME             MODULE_NAME
  31 #define DRIVER_DESC             "OMAP DRM"
  32 #define DRIVER_DATE             "20110917"
  33 #define DRIVER_MAJOR            1
  34 #define DRIVER_MINOR            0
  35 #define DRIVER_PATCHLEVEL       0
  36
  37 static int num_crtc = CONFIG_DRM_OMAP_NUM_CRTCS;
  38
  39 MODULE_PARM_DESC(num_crtc, "Number of overlays to use as CRTCs");
  40 module_param(num_crtc, int, 0600);
  41
  42 /*
  43  * mode config funcs
  44  */
  45
  46 /* Notes about mapping DSS and DRM entities:
  47  *    CRTC:        overlay
  48  *    encoder:     manager.. with some extension to allow one primary CRTC
  49  *                 and zero or more video CRTC's to be mapped to one encoder?
  50  *    connector:   dssdev.. manager can be attached/detached from different
  51  *                 devices
  52  */
  53
  54 static void omap_fb_output_poll_changed(struct drm_device *dev)
  55 {
  56         struct omap_drm_private *priv = dev->dev_private;
  57         DBG("dev=%p", dev);
  58         if (priv->fbdev)
  59                 drm_fb_helper_hotplug_event(priv->fbdev);
  60 }
  61
  62 struct omap_atomic_state_commit {
  63         struct work_struct work;
  64         struct drm_device *dev;
  65         struct drm_atomic_state *state;
  66         u32 crtcs;
  67 };
  68
  69 static void omap_atomic_wait_for_completion(struct drm_device *dev,
  70                                             struct drm_atomic_state *old_state)
  71 {
  72         struct drm_crtc_state *old_crtc_state;
  73         struct drm_crtc *crtc;
  74         unsigned int i;
  75         int ret;
  76
  77         for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
  78                 if (!crtc->state->enable)
  79                         continue;
  80
  81                 ret = omap_crtc_wait_pending(crtc);
  82
  83                 if (!ret)
  84                         dev_warn(dev->dev,
  85                                  "atomic complete timeout (pipe %u)!\n", i);
  86         }
  87 }
  88
  89 static void omap_atomic_complete(struct omap_atomic_state_commit *commit)
  90 {
  91         struct drm_device *dev = commit->dev;
  92         struct omap_drm_private *priv = dev->dev_private;
  93         struct drm_atomic_state *old_state = commit->state;
  94
  95         /* Apply the atomic update. */
  96         dispc_runtime_get();
  97
  98         drm_atomic_helper_commit_modeset_disables(dev, old_state);
  99         drm_atomic_helper_commit_planes(dev, old_state, false);
 100         drm_atomic_helper_commit_modeset_enables(dev, old_state);
 101
 102         omap_atomic_wait_for_completion(dev, old_state);
 103
 104         drm_atomic_helper_cleanup_planes(dev, old_state);
 105
 106         dispc_runtime_put();
 107
 108         drm_atomic_state_free(old_state);
 109
 110         /* Complete the commit, wake up any waiter. */
 111         spin_lock(&priv->commit.lock);
 112         priv->commit.pending &= ~commit->crtcs;
 113         spin_unlock(&priv->commit.lock);
 114
 115         wake_up_all(&priv->commit.wait);
 116
 117         kfree(commit);
 118 }
 119
 120 static void omap_atomic_work(struct work_struct *work)
 121 {
 122         struct omap_atomic_state_commit *commit =
 123                 container_of(work, struct omap_atomic_state_commit, work);
 124
 125         omap_atomic_complete(commit);
 126 }
 127
 128 static bool omap_atomic_is_pending(struct omap_drm_private *priv,
 129                                    struct omap_atomic_state_commit *commit)
 130 {
 131         bool pending;
 132
 133         spin_lock(&priv->commit.lock);
 134         pending = priv->commit.pending & commit->crtcs;
 135         spin_unlock(&priv->commit.lock);
 136
 137         return pending;
 138 }
 139
 140 static int omap_atomic_commit(struct drm_device *dev,
 141                               struct drm_atomic_state *state, bool async)
 142 {
 143         struct omap_drm_private *priv = dev->dev_private;
 144         struct omap_atomic_state_commit *commit;
 145         unsigned long flags;
 146         unsigned int i;
 147         int ret;
 148
 149         ret = drm_atomic_helper_prepare_planes(dev, state);
 150         if (ret)
 151                 return ret;
 152
 153         /* Allocate the commit object. */
 154         commit = kzalloc(sizeof(*commit), GFP_KERNEL);
 155         if (commit == NULL) {
 156                 ret = -ENOMEM;
 157                 goto error;
 158         }
 159
 160         INIT_WORK(&commit->work, omap_atomic_work);
 161         commit->dev = dev;
 162         commit->state = state;
 163
 164         /* Wait until all affected CRTCs have completed previous commits and
 165          * mark them as pending.
 166          */
 167         for (i = 0; i < dev->mode_config.num_crtc; ++i) {
 168                 if (state->crtcs[i])
 169                         commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]);
 170         }
 171
 172         wait_event(priv->commit.wait, !omap_atomic_is_pending(priv, commit));
 173
 174         spin_lock(&priv->commit.lock);
 175         priv->commit.pending |= commit->crtcs;
 176         spin_unlock(&priv->commit.lock);
 177
 178         /* Keep track of all CRTC events to unlink them in preclose(). */
 179         spin_lock_irqsave(&dev->event_lock, flags);
 180         for (i = 0; i < dev->mode_config.num_crtc; ++i) {
 181                 struct drm_crtc_state *cstate = state->crtc_states[i];
 182
 183                 if (cstate && cstate->event)
 184                         list_add_tail(&cstate->event->base.link,
 185                                       &priv->commit.events);
 186         }
 187         spin_unlock_irqrestore(&dev->event_lock, flags);
 188
 189         /* Swap the state, this is the point of no return. */
 190         drm_atomic_helper_swap_state(dev, state);
 191
 192         if (async)
 193                 schedule_work(&commit->work);
 194         else
 195                 omap_atomic_complete(commit);
 196
 197         return 0;
 198
 199 error:
 200         drm_atomic_helper_cleanup_planes(dev, state);
 201         return ret;
 202 }
 203
 204 static const struct drm_mode_config_funcs omap_mode_config_funcs = {
 205         .fb_create = omap_framebuffer_create,
 206         .output_poll_changed = omap_fb_output_poll_changed,
 207         .atomic_check = drm_atomic_helper_check,
 208         .atomic_commit = omap_atomic_commit,
 209 };
 210
 211 static int get_connector_type(struct omap_dss_device *dssdev)
 212 {
 213         switch (dssdev->type) {
 214         case OMAP_DISPLAY_TYPE_HDMI:
 215                 return DRM_MODE_CONNECTOR_HDMIA;
 216         case OMAP_DISPLAY_TYPE_DVI:
 217                 return DRM_MODE_CONNECTOR_DVID;
 218         default:
 219                 return DRM_MODE_CONNECTOR_Unknown;
 220         }
 221 }
 222
 223 static bool channel_used(struct drm_device *dev, enum omap_channel channel)
 224 {
 225         struct omap_drm_private *priv = dev->dev_private;
 226         int i;
 227
 228         for (i = 0; i < priv->num_crtcs; i++) {
 229                 struct drm_crtc *crtc = priv->crtcs[i];
 230
 231                 if (omap_crtc_channel(crtc) == channel)
 232                         return true;
 233         }
 234
 235         return false;
 236 }
 237 static void omap_disconnect_dssdevs(void)
 238 {
 239         struct omap_dss_device *dssdev = NULL;
 240
 241         for_each_dss_dev(dssdev)
 242                 dssdev->driver->disconnect(dssdev);
 243 }
 244
 245 static int omap_connect_dssdevs(void)
 246 {
 247         int r;
 248         struct omap_dss_device *dssdev = NULL;
 249         bool no_displays = true;
 250
 251         for_each_dss_dev(dssdev) {
 252                 r = dssdev->driver->connect(dssdev);
 253                 if (r == -EPROBE_DEFER) {
 254                         omap_dss_put_device(dssdev);
 255                         goto cleanup;
 256                 } else if (r) {
 257                         dev_warn(dssdev->dev, "could not connect display: %s\n",
 258                                 dssdev->name);
 259                 } else {
 260                         no_displays = false;
 261                 }
 262         }
 263
 264         if (no_displays)
 265                 return -EPROBE_DEFER;
 266
 267         return 0;
 268
 269 cleanup:
 270         /*
 271          * if we are deferring probe, we disconnect the devices we previously
 272          * connected
 273          */
 274         omap_disconnect_dssdevs();
 275
 276         return r;
 277 }
 278
 279 static int omap_modeset_create_crtc(struct drm_device *dev, int id,
 280                                     enum omap_channel channel)
 281 {
 282         struct omap_drm_private *priv = dev->dev_private;
 283         struct drm_plane *plane;
 284         struct drm_crtc *crtc;
 285
 286         plane = omap_plane_init(dev, id, DRM_PLANE_TYPE_PRIMARY);
 287         if (IS_ERR(plane))
 288                 return PTR_ERR(plane);
 289
 290         crtc = omap_crtc_init(dev, plane, channel, id);
 291
 292         BUG_ON(priv->num_crtcs >= ARRAY_SIZE(priv->crtcs));
 293         priv->crtcs[id] = crtc;
 294         priv->num_crtcs++;
 295
 296         priv->planes[id] = plane;
 297         priv->num_planes++;
 298
 299         return 0;
 300 }
 301
 302 static int omap_modeset_init_properties(struct drm_device *dev)
 303 {
 304         struct omap_drm_private *priv = dev->dev_private;
 305
 306         if (priv->has_dmm) {
 307                 dev->mode_config.rotation_property =
 308                         drm_mode_create_rotation_property(dev,
 309                                 BIT(DRM_ROTATE_0) | BIT(DRM_ROTATE_90) |
 310                                 BIT(DRM_ROTATE_180) | BIT(DRM_ROTATE_270) |
 311                                 BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y));
 312                 if (!dev->mode_config.rotation_property)
 313                         return -ENOMEM;
 314         }
 315
 316         priv->zorder_prop = drm_property_create_range(dev, 0, "zorder", 0, 3);
 317         if (!priv->zorder_prop)
 318                 return -ENOMEM;
 319
 320         return 0;
 321 }
 322
 323 static int omap_modeset_init(struct drm_device *dev)
 324 {
 325         struct omap_drm_private *priv = dev->dev_private;
 326         struct omap_dss_device *dssdev = NULL;
 327         int num_ovls = dss_feat_get_num_ovls();
 328         int num_mgrs = dss_feat_get_num_mgrs();
 329         int num_crtcs;
 330         int i, id = 0;
 331         int ret;
 332
 333         drm_mode_config_init(dev);
 334
 335         omap_drm_irq_install(dev);
 336
 337         ret = omap_modeset_init_properties(dev);
 338         if (ret < 0)
 339                 return ret;
 340
 341         /*
 342          * We usually don't want to create a CRTC for each manager, at least
 343          * not until we have a way to expose private planes to userspace.
 344          * Otherwise there would not be enough video pipes left for drm planes.
 345          * We use the num_crtc argument to limit the number of crtcs we create.
 346          */
 347         num_crtcs = min3(num_crtc, num_mgrs, num_ovls);
 348
 349         dssdev = NULL;
 350
 351         for_each_dss_dev(dssdev) {
 352                 struct drm_connector *connector;
 353                 struct drm_encoder *encoder;
 354                 enum omap_channel channel;
 355                 struct omap_overlay_manager *mgr;
 356
 357                 if (!omapdss_device_is_connected(dssdev))
 358                         continue;
 359
 360                 encoder = omap_encoder_init(dev, dssdev);
 361
 362                 if (!encoder) {
 363                         dev_err(dev->dev, "could not create encoder: %s\n",
 364                                         dssdev->name);
 365                         return -ENOMEM;
 366                 }
 367
 368                 connector = omap_connector_init(dev,
 369                                 get_connector_type(dssdev), dssdev, encoder);
 370
 371                 if (!connector) {
 372                         dev_err(dev->dev, "could not create connector: %s\n",
 373                                         dssdev->name);
 374                         return -ENOMEM;
 375                 }
 376
 377                 BUG_ON(priv->num_encoders >= ARRAY_SIZE(priv->encoders));
 378                 BUG_ON(priv->num_connectors >= ARRAY_SIZE(priv->connectors));
 379
 380                 priv->encoders[priv->num_encoders++] = encoder;
 381                 priv->connectors[priv->num_connectors++] = connector;
 382
 383                 drm_mode_connector_attach_encoder(connector, encoder);
 384
 385                 /*
 386                  * if we have reached the limit of the crtcs we are allowed to
 387                  * create, let's not try to look for a crtc for this
 388                  * panel/encoder and onwards, we will, of course, populate the
 389                  * the possible_crtcs field for all the encoders with the final
 390                  * set of crtcs we create
 391                  */
 392                 if (id == num_crtcs)
 393                         continue;
 394
 395                 /*
 396                  * get the recommended DISPC channel for this encoder. For now,
 397                  * we only try to get create a crtc out of the recommended, the
 398                  * other possible channels to which the encoder can connect are
 399                  * not considered.
 400                  */
 401
 402                 mgr = omapdss_find_mgr_from_display(dssdev);
 403                 channel = mgr->id;
 404                 /*
 405                  * if this channel hasn't already been taken by a previously
 406                  * allocated crtc, we create a new crtc for it
 407                  */
 408                 if (!channel_used(dev, channel)) {
 409                         ret = omap_modeset_create_crtc(dev, id, channel);
 410                         if (ret < 0) {
 411                                 dev_err(dev->dev,
 412                                         "could not create CRTC (channel %u)\n",
 413                                         channel);
 414                                 return ret;
 415                         }
 416
 417                         id++;
 418                 }
 419         }
 420
 421         /*
 422          * we have allocated crtcs according to the need of the panels/encoders,
 423          * adding more crtcs here if needed
 424          */
 425         for (; id < num_crtcs; id++) {
 426
 427                 /* find a free manager for this crtc */
 428                 for (i = 0; i < num_mgrs; i++) {
 429                         if (!channel_used(dev, i))
 430                                 break;
 431                 }
 432
 433                 if (i == num_mgrs) {
 434                         /* this shouldn't really happen */
 435                         dev_err(dev->dev, "no managers left for crtc\n");
 436                         return -ENOMEM;
 437                 }
 438
 439                 ret = omap_modeset_create_crtc(dev, id, i);
 440                 if (ret < 0) {
 441                         dev_err(dev->dev,
 442                                 "could not create CRTC (channel %u)\n", i);
 443                         return ret;
 444                 }
 445         }
 446
 447         /*
 448          * Create normal planes for the remaining overlays:
 449          */
 450         for (; id < num_ovls; id++) {
 451                 struct drm_plane *plane;
 452
 453                 plane = omap_plane_init(dev, id, DRM_PLANE_TYPE_OVERLAY);
 454                 if (IS_ERR(plane))
 455                         return PTR_ERR(plane);
 456
 457                 BUG_ON(priv->num_planes >= ARRAY_SIZE(priv->planes));
 458                 priv->planes[priv->num_planes++] = plane;
 459         }
 460
 461         for (i = 0; i < priv->num_encoders; i++) {
 462                 struct drm_encoder *encoder = priv->encoders[i];
 463                 struct omap_dss_device *dssdev =
 464                                         omap_encoder_get_dssdev(encoder);
 465                 struct omap_dss_device *output;
 466
 467                 output = omapdss_find_output_from_display(dssdev);
 468
 469                 /* figure out which crtc's we can connect the encoder to: */
 470                 encoder->possible_crtcs = 0;
 471                 for (id = 0; id < priv->num_crtcs; id++) {
 472                         struct drm_crtc *crtc = priv->crtcs[id];
 473                         enum omap_channel crtc_channel;
 474
 475                         crtc_channel = omap_crtc_channel(crtc);
 476
 477                         if (output->dispc_channel == crtc_channel) {
 478                                 encoder->possible_crtcs |= (1 << id);
 479                                 break;
 480                         }
 481                 }
 482
 483                 omap_dss_put_device(output);
 484         }
 485
 486         DBG("registered %d planes, %d crtcs, %d encoders and %d connectors\n",
 487                 priv->num_planes, priv->num_crtcs, priv->num_encoders,
 488                 priv->num_connectors);
 489
 490         dev->mode_config.min_width = 32;
 491         dev->mode_config.min_height = 32;
 492
 493         /* note: eventually will need some cpu_is_omapXYZ() type stuff here
 494          * to fill in these limits properly on different OMAP generations..
 495          */
 496         dev->mode_config.max_width = 2048;
 497         dev->mode_config.max_height = 2048;
 498
 499         dev->mode_config.funcs = &omap_mode_config_funcs;
 500
 501         drm_mode_config_reset(dev);
 502
 503         return 0;
 504 }
 505
 506 static void omap_modeset_free(struct drm_device *dev)
 507 {
 508         drm_mode_config_cleanup(dev);
 509 }
 510
 511 /*
 512  * drm ioctl funcs
 513  */
 514
 515
 516 static int ioctl_get_param(struct drm_device *dev, void *data,
 517                 struct drm_file *file_priv)
 518 {
 519         struct omap_drm_private *priv = dev->dev_private;
 520         struct drm_omap_param *args = data;
 521
 522         DBG("%p: param=%llu", dev, args->param);
 523
 524         switch (args->param) {
 525         case OMAP_PARAM_CHIPSET_ID:
 526                 args->value = priv->omaprev;
 527                 break;
 528         default:
 529                 DBG("unknown parameter %lld", args->param);
 530                 return -EINVAL;
 531         }
 532
 533         return 0;
 534 }
 535
 536 static int ioctl_set_param(struct drm_device *dev, void *data,
 537                 struct drm_file *file_priv)
 538 {
 539         struct drm_omap_param *args = data;
 540
 541         switch (args->param) {
 542         default:
 543                 DBG("unknown parameter %lld", args->param);
 544                 return -EINVAL;
 545         }
 546
 547         return 0;
 548 }
 549
 550 static int ioctl_gem_new(struct drm_device *dev, void *data,
 551                 struct drm_file *file_priv)
 552 {
 553         struct drm_omap_gem_new *args = data;
 554         VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
 555                         args->size.bytes, args->flags);
 556         return omap_gem_new_handle(dev, file_priv, args->size,
 557                         args->flags, &args->handle);
 558 }
 559
 560 static int ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
 561                 struct drm_file *file_priv)
 562 {
 563         struct drm_omap_gem_cpu_prep *args = data;
 564         struct drm_gem_object *obj;
 565         int ret;
 566
 567         VERB("%p:%p: handle=%d, op=%x", dev, file_priv, args->handle, args->op);
 568
 569         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 570         if (!obj)
 571                 return -ENOENT;
 572
 573         ret = omap_gem_op_sync(obj, args->op);
 574
 575         if (!ret)
 576                 ret = omap_gem_op_start(obj, args->op);
 577
 578         drm_gem_object_unreference_unlocked(obj);
 579
 580         return ret;
 581 }
 582
 583 static int ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
 584                 struct drm_file *file_priv)
 585 {
 586         struct drm_omap_gem_cpu_fini *args = data;
 587         struct drm_gem_object *obj;
 588         int ret;
 589
 590         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 591
 592         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 593         if (!obj)
 594                 return -ENOENT;
 595
 596         /* XXX flushy, flushy */
 597         ret = 0;
 598
 599         if (!ret)
 600                 ret = omap_gem_op_finish(obj, args->op);
 601
 602         drm_gem_object_unreference_unlocked(obj);
 603
 604         return ret;
 605 }
 606
 607 static int ioctl_gem_info(struct drm_device *dev, void *data,
 608                 struct drm_file *file_priv)
 609 {
 610         struct drm_omap_gem_info *args = data;
 611         struct drm_gem_object *obj;
 612         int ret = 0;
 613
 614         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 615
 616         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 617         if (!obj)
 618                 return -ENOENT;
 619
 620         args->size = omap_gem_mmap_size(obj);
 621         args->offset = omap_gem_mmap_offset(obj);
 622
 623         drm_gem_object_unreference_unlocked(obj);
 624
 625         return ret;
 626 }
 627
 628 static const struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
 629         DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param, DRM_AUTH),
 630         DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 631         DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_AUTH),
 632         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, ioctl_gem_cpu_prep, DRM_AUTH),
 633         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, ioctl_gem_cpu_fini, DRM_AUTH),
 634         DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_AUTH),
 635 };
 636
 637 /*
 638  * drm driver funcs
 639  */
 640
 641 /**
 642  * load - setup chip and create an initial config
 643  * @dev: DRM device
 644  * @flags: startup flags
 645  *
 646  * The driver load routine has to do several things:
 647  *   - initialize the memory manager
 648  *   - allocate initial config memory
 649  *   - setup the DRM framebuffer with the allocated memory
 650  */
 651 static int dev_load(struct drm_device *dev, unsigned long flags)
 652 {
 653         struct omap_drm_platform_data *pdata = dev->dev->platform_data;
 654         struct omap_drm_private *priv;
 655         unsigned int i;
 656         int ret;
 657
 658         DBG("load: dev=%p", dev);
 659
 660         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 661         if (!priv)
 662                 return -ENOMEM;
 663
 664         priv->omaprev = pdata->omaprev;
 665
 666         dev->dev_private = priv;
 667
 668         priv->wq = alloc_ordered_workqueue("omapdrm", 0);
 669         init_waitqueue_head(&priv->commit.wait);
 670         spin_lock_init(&priv->commit.lock);
 671         INIT_LIST_HEAD(&priv->commit.events);
 672
 673         spin_lock_init(&priv->list_lock);
 674         INIT_LIST_HEAD(&priv->obj_list);
 675
 676         omap_gem_init(dev);
 677
 678         ret = omap_modeset_init(dev);
 679         if (ret) {
 680                 dev_err(dev->dev, "omap_modeset_init failed: ret=%d\n", ret);
 681                 dev->dev_private = NULL;
 682                 kfree(priv);
 683                 return ret;
 684         }
 685
 686         /* Initialize vblank handling, start with all CRTCs disabled. */
 687         ret = drm_vblank_init(dev, priv->num_crtcs);
 688         if (ret)
 689                 dev_warn(dev->dev, "could not init vblank\n");
 690
 691         for (i = 0; i < priv->num_crtcs; i++)
 692                 drm_crtc_vblank_off(priv->crtcs[i]);
 693
 694         priv->fbdev = omap_fbdev_init(dev);
 695         if (!priv->fbdev) {
 696                 dev_warn(dev->dev, "omap_fbdev_init failed\n");
 697                 /* well, limp along without an fbdev.. maybe X11 will work? */
 698         }
 699
 700         /* store off drm_device for use in pm ops */
 701         dev_set_drvdata(dev->dev, dev);
 702
 703         drm_kms_helper_poll_init(dev);
 704
 705         return 0;
 706 }
 707
 708 static int dev_unload(struct drm_device *dev)
 709 {
 710         struct omap_drm_private *priv = dev->dev_private;
 711
 712         DBG("unload: dev=%p", dev);
 713
 714         drm_kms_helper_poll_fini(dev);
 715
 716         if (priv->fbdev)
 717                 omap_fbdev_free(dev);
 718
 719         omap_modeset_free(dev);
 720         omap_gem_deinit(dev);
 721
 722         destroy_workqueue(priv->wq);
 723
 724         drm_vblank_cleanup(dev);
 725         omap_drm_irq_uninstall(dev);
 726
 727         kfree(dev->dev_private);
 728         dev->dev_private = NULL;
 729
 730         dev_set_drvdata(dev->dev, NULL);
 731
 732         return 0;
 733 }
 734
 735 static int dev_open(struct drm_device *dev, struct drm_file *file)
 736 {
 737         file->driver_priv = NULL;
 738
 739         DBG("open: dev=%p, file=%p", dev, file);
 740
 741         return 0;
 742 }
 743
 744 /**
 745  * lastclose - clean up after all DRM clients have exited
 746  * @dev: DRM device
 747  *
 748  * Take care of cleaning up after all DRM clients have exited.  In the
 749  * mode setting case, we want to restore the kernel's initial mode (just
 750  * in case the last client left us in a bad state).
 751  */
 752 static void dev_lastclose(struct drm_device *dev)
 753 {
 754         int i;
 755
 756         /* we don't support vga_switcheroo.. so just make sure the fbdev
 757          * mode is active
 758          */
 759         struct omap_drm_private *priv = dev->dev_private;
 760         int ret;
 761
 762         DBG("lastclose: dev=%p", dev);
 763
 764         if (dev->mode_config.rotation_property) {
 765                 /* need to restore default rotation state.. not sure
 766                  * if there is a cleaner way to restore properties to
 767                  * default state?  Maybe a flag that properties should
 768                  * automatically be restored to default state on
 769                  * lastclose?
 770                  */
 771                 for (i = 0; i < priv->num_crtcs; i++) {
 772                         drm_object_property_set_value(&priv->crtcs[i]->base,
 773                                         dev->mode_config.rotation_property, 0);
 774                 }
 775
 776                 for (i = 0; i < priv->num_planes; i++) {
 777                         drm_object_property_set_value(&priv->planes[i]->base,
 778                                         dev->mode_config.rotation_property, 0);
 779                 }
 780         }
 781
 782         if (priv->fbdev) {
 783                 ret = drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
 784                 if (ret)
 785                         DBG("failed to restore crtc mode");
 786         }
 787 }
 788
 789 static void dev_preclose(struct drm_device *dev, struct drm_file *file)
 790 {
 791         struct omap_drm_private *priv = dev->dev_private;
 792         struct drm_pending_event *event;
 793         unsigned long flags;
 794
 795         DBG("preclose: dev=%p", dev);
 796
 797         /*
 798          * Unlink all pending CRTC events to make sure they won't be queued up
 799          * by a pending asynchronous commit.
 800          */
 801         spin_lock_irqsave(&dev->event_lock, flags);
 802         list_for_each_entry(event, &priv->commit.events, link) {
 803                 if (event->file_priv == file) {
 804                         file->event_space += event->event->length;
 805                         event->file_priv = NULL;
 806                 }
 807         }
 808         spin_unlock_irqrestore(&dev->event_lock, flags);
 809 }
 810
 811 static void dev_postclose(struct drm_device *dev, struct drm_file *file)
 812 {
 813         DBG("postclose: dev=%p, file=%p", dev, file);
 814 }
 815
 816 static const struct vm_operations_struct omap_gem_vm_ops = {
 817         .fault = omap_gem_fault,
 818         .open = drm_gem_vm_open,
 819         .close = drm_gem_vm_close,
 820 };
 821
 822 static const struct file_operations omapdriver_fops = {
 823         .owner = THIS_MODULE,
 824         .open = drm_open,
 825         .unlocked_ioctl = drm_ioctl,
 826         .release = drm_release,
 827         .mmap = omap_gem_mmap,
 828         .poll = drm_poll,
 829         .read = drm_read,
 830         .llseek = noop_llseek,
 831 };
 832
 833 static struct drm_driver omap_drm_driver = {
 834         .driver_features = DRIVER_MODESET | DRIVER_GEM  | DRIVER_PRIME,
 835         .load = dev_load,
 836         .unload = dev_unload,
 837         .open = dev_open,
 838         .lastclose = dev_lastclose,
 839         .preclose = dev_preclose,
 840         .postclose = dev_postclose,
 841         .set_busid = drm_platform_set_busid,
 842         .get_vblank_counter = drm_vblank_no_hw_counter,
 843         .enable_vblank = omap_irq_enable_vblank,
 844         .disable_vblank = omap_irq_disable_vblank,
 845 #ifdef CONFIG_DEBUG_FS
 846         .debugfs_init = omap_debugfs_init,
 847         .debugfs_cleanup = omap_debugfs_cleanup,
 848 #endif
 849         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 850         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 851         .gem_prime_export = omap_gem_prime_export,
 852         .gem_prime_import = omap_gem_prime_import,
 853         .gem_free_object = omap_gem_free_object,
 854         .gem_vm_ops = &omap_gem_vm_ops,
 855         .dumb_create = omap_gem_dumb_create,
 856         .dumb_map_offset = omap_gem_dumb_map_offset,
 857         .dumb_destroy = drm_gem_dumb_destroy,
 858         .ioctls = ioctls,
 859         .num_ioctls = DRM_OMAP_NUM_IOCTLS,
 860         .fops = &omapdriver_fops,
 861         .name = DRIVER_NAME,
 862         .desc = DRIVER_DESC,
 863         .date = DRIVER_DATE,
 864         .major = DRIVER_MAJOR,
 865         .minor = DRIVER_MINOR,
 866         .patchlevel = DRIVER_PATCHLEVEL,
 867 };
 868
 869 static int pdev_probe(struct platform_device *device)
 870 {
 871         int r;
 872
 873         if (omapdss_is_initialized() == false)
 874                 return -EPROBE_DEFER;
 875
 876         omap_crtc_pre_init();
 877
 878         r = omap_connect_dssdevs();
 879         if (r) {
 880                 omap_crtc_pre_uninit();
 881                 return r;
 882         }
 883
 884         DBG("%s", device->name);
 885         return drm_platform_init(&omap_drm_driver, device);
 886 }
 887
 888 static int pdev_remove(struct platform_device *device)
 889 {
 890         DBG("");
 891
 892         drm_put_dev(platform_get_drvdata(device));
 893
 894         omap_disconnect_dssdevs();
 895         omap_crtc_pre_uninit();
 896
 897         return 0;
 898 }
 899
 900 #ifdef CONFIG_PM_SLEEP
 901 static int omap_drm_suspend(struct device *dev)
 902 {
 903         struct drm_device *drm_dev = dev_get_drvdata(dev);
 904
 905         drm_kms_helper_poll_disable(drm_dev);
 906
 907         return 0;
 908 }
 909
 910 static int omap_drm_resume(struct device *dev)
 911 {
 912         struct drm_device *drm_dev = dev_get_drvdata(dev);
 913
 914         drm_kms_helper_poll_enable(drm_dev);
 915
 916         return omap_gem_resume(dev);
 917 }
 918 #endif
 919
 920 static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume);
 921
 922 static struct platform_driver pdev = {
 923         .driver = {
 924                 .name = DRIVER_NAME,
 925                 .pm = &omapdrm_pm_ops,
 926         },
 927         .probe = pdev_probe,
 928         .remove = pdev_remove,
 929 };
 930
 931 static int __init omap_drm_init(void)
 932 {
 933         int r;
 934
 935         DBG("init");
 936
 937         r = platform_driver_register(&omap_dmm_driver);
 938         if (r) {
 939                 pr_err("DMM driver registration failed\n");
 940                 return r;
 941         }
 942
 943         r = platform_driver_register(&pdev);
 944         if (r) {
 945                 pr_err("omapdrm driver registration failed\n");
 946                 platform_driver_unregister(&omap_dmm_driver);
 947                 return r;
 948         }
 949
 950         return 0;
 951 }
 952
 953 static void __exit omap_drm_fini(void)
 954 {
 955         DBG("fini");
 956
 957         platform_driver_unregister(&pdev);
 958
 959         platform_driver_unregister(&omap_dmm_driver);
 960 }
 961
 962 /* need late_initcall() so we load after dss_driver's are loaded */
 963 late_initcall(omap_drm_init);
 964 module_exit(omap_drm_fini);
 965
 966 MODULE_AUTHOR("Rob Clark <rob@ti.com>");
 967 MODULE_DESCRIPTION("OMAP DRM Display Driver");
 968 MODULE_ALIAS("platform:" DRIVER_NAME);
 969 MODULE_LICENSE("GPL v2");