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 "omap_drv.h"
  21
  22 #include "drm_crtc_helper.h"
  23 #include "drm_fb_helper.h"
  24 #include "omap_dmm_tiler.h"
  25
  26 #define DRIVER_NAME             MODULE_NAME
  27 #define DRIVER_DESC             "OMAP DRM"
  28 #define DRIVER_DATE             "20110917"
  29 #define DRIVER_MAJOR            1
  30 #define DRIVER_MINOR            0
  31 #define DRIVER_PATCHLEVEL       0
  32
  33 static int num_crtc = CONFIG_DRM_OMAP_NUM_CRTCS;
  34
  35 MODULE_PARM_DESC(num_crtc, "Number of overlays to use as CRTCs");
  36 module_param(num_crtc, int, 0600);
  37
  38 /*
  39  * mode config funcs
  40  */
  41
  42 /* Notes about mapping DSS and DRM entities:
  43  *    CRTC:        overlay
  44  *    encoder:     manager.. with some extension to allow one primary CRTC
  45  *                 and zero or more video CRTC's to be mapped to one encoder?
  46  *    connector:   dssdev.. manager can be attached/detached from different
  47  *                 devices
  48  */
  49
  50 static void omap_fb_output_poll_changed(struct drm_device *dev)
  51 {
  52         struct omap_drm_private *priv = dev->dev_private;
  53         DBG("dev=%p", dev);
  54         if (priv->fbdev)
  55                 drm_fb_helper_hotplug_event(priv->fbdev);
  56 }
  57
  58 static const struct drm_mode_config_funcs omap_mode_config_funcs = {
  59         .fb_create = omap_framebuffer_create,
  60         .output_poll_changed = omap_fb_output_poll_changed,
  61 };
  62
  63 static int get_connector_type(struct omap_dss_device *dssdev)
  64 {
  65         switch (dssdev->type) {
  66         case OMAP_DISPLAY_TYPE_HDMI:
  67                 return DRM_MODE_CONNECTOR_HDMIA;
  68         case OMAP_DISPLAY_TYPE_DVI:
  69                 return DRM_MODE_CONNECTOR_DVID;
  70         default:
  71                 return DRM_MODE_CONNECTOR_Unknown;
  72         }
  73 }
  74
  75 static bool channel_used(struct drm_device *dev, enum omap_channel channel)
  76 {
  77         struct omap_drm_private *priv = dev->dev_private;
  78         int i;
  79
  80         for (i = 0; i < priv->num_crtcs; i++) {
  81                 struct drm_crtc *crtc = priv->crtcs[i];
  82
  83                 if (omap_crtc_channel(crtc) == channel)
  84                         return true;
  85         }
  86
  87         return false;
  88 }
  89 static void omap_disconnect_dssdevs(void)
  90 {
  91         struct omap_dss_device *dssdev = NULL;
  92
  93         for_each_dss_dev(dssdev)
  94                 dssdev->driver->disconnect(dssdev);
  95 }
  96
  97 static int omap_connect_dssdevs(void)
  98 {
  99         int r;
 100         struct omap_dss_device *dssdev = NULL;
 101         bool no_displays = true;
 102
 103         for_each_dss_dev(dssdev) {
 104                 r = dssdev->driver->connect(dssdev);
 105                 if (r == -EPROBE_DEFER) {
 106                         omap_dss_put_device(dssdev);
 107                         goto cleanup;
 108                 } else if (r) {
 109                         dev_warn(dssdev->dev, "could not connect display: %s\n",
 110                                 dssdev->name);
 111                 } else {
 112                         no_displays = false;
 113                 }
 114         }
 115
 116         if (no_displays)
 117                 return -EPROBE_DEFER;
 118
 119         return 0;
 120
 121 cleanup:
 122         /*
 123          * if we are deferring probe, we disconnect the devices we previously
 124          * connected
 125          */
 126         omap_disconnect_dssdevs();
 127
 128         return r;
 129 }
 130
 131 static int omap_modeset_create_crtc(struct drm_device *dev, int id,
 132                                     enum omap_channel channel)
 133 {
 134         struct omap_drm_private *priv = dev->dev_private;
 135         struct drm_plane *plane;
 136         struct drm_crtc *crtc;
 137
 138         plane = omap_plane_init(dev, id, DRM_PLANE_TYPE_PRIMARY);
 139         if (IS_ERR(plane))
 140                 return PTR_ERR(plane);
 141
 142         crtc = omap_crtc_init(dev, plane, channel, id);
 143
 144         BUG_ON(priv->num_crtcs >= ARRAY_SIZE(priv->crtcs));
 145         priv->crtcs[id] = crtc;
 146         priv->num_crtcs++;
 147
 148         priv->planes[id] = plane;
 149         priv->num_planes++;
 150
 151         return 0;
 152 }
 153
 154 static int omap_modeset_init(struct drm_device *dev)
 155 {
 156         struct omap_drm_private *priv = dev->dev_private;
 157         struct omap_dss_device *dssdev = NULL;
 158         int num_ovls = dss_feat_get_num_ovls();
 159         int num_mgrs = dss_feat_get_num_mgrs();
 160         int num_crtcs;
 161         int i, id = 0;
 162         int ret;
 163
 164         drm_mode_config_init(dev);
 165
 166         omap_drm_irq_install(dev);
 167
 168         /*
 169          * We usually don't want to create a CRTC for each manager, at least
 170          * not until we have a way to expose private planes to userspace.
 171          * Otherwise there would not be enough video pipes left for drm planes.
 172          * We use the num_crtc argument to limit the number of crtcs we create.
 173          */
 174         num_crtcs = min3(num_crtc, num_mgrs, num_ovls);
 175
 176         dssdev = NULL;
 177
 178         for_each_dss_dev(dssdev) {
 179                 struct drm_connector *connector;
 180                 struct drm_encoder *encoder;
 181                 enum omap_channel channel;
 182                 struct omap_overlay_manager *mgr;
 183
 184                 if (!omapdss_device_is_connected(dssdev))
 185                         continue;
 186
 187                 encoder = omap_encoder_init(dev, dssdev);
 188
 189                 if (!encoder) {
 190                         dev_err(dev->dev, "could not create encoder: %s\n",
 191                                         dssdev->name);
 192                         return -ENOMEM;
 193                 }
 194
 195                 connector = omap_connector_init(dev,
 196                                 get_connector_type(dssdev), dssdev, encoder);
 197
 198                 if (!connector) {
 199                         dev_err(dev->dev, "could not create connector: %s\n",
 200                                         dssdev->name);
 201                         return -ENOMEM;
 202                 }
 203
 204                 BUG_ON(priv->num_encoders >= ARRAY_SIZE(priv->encoders));
 205                 BUG_ON(priv->num_connectors >= ARRAY_SIZE(priv->connectors));
 206
 207                 priv->encoders[priv->num_encoders++] = encoder;
 208                 priv->connectors[priv->num_connectors++] = connector;
 209
 210                 drm_mode_connector_attach_encoder(connector, encoder);
 211
 212                 /*
 213                  * if we have reached the limit of the crtcs we are allowed to
 214                  * create, let's not try to look for a crtc for this
 215                  * panel/encoder and onwards, we will, of course, populate the
 216                  * the possible_crtcs field for all the encoders with the final
 217                  * set of crtcs we create
 218                  */
 219                 if (id == num_crtcs)
 220                         continue;
 221
 222                 /*
 223                  * get the recommended DISPC channel for this encoder. For now,
 224                  * we only try to get create a crtc out of the recommended, the
 225                  * other possible channels to which the encoder can connect are
 226                  * not considered.
 227                  */
 228
 229                 mgr = omapdss_find_mgr_from_display(dssdev);
 230                 channel = mgr->id;
 231                 /*
 232                  * if this channel hasn't already been taken by a previously
 233                  * allocated crtc, we create a new crtc for it
 234                  */
 235                 if (!channel_used(dev, channel)) {
 236                         ret = omap_modeset_create_crtc(dev, id, channel);
 237                         if (ret < 0) {
 238                                 dev_err(dev->dev,
 239                                         "could not create CRTC (channel %u)\n",
 240                                         channel);
 241                                 return ret;
 242                         }
 243
 244                         id++;
 245                 }
 246         }
 247
 248         /*
 249          * we have allocated crtcs according to the need of the panels/encoders,
 250          * adding more crtcs here if needed
 251          */
 252         for (; id < num_crtcs; id++) {
 253
 254                 /* find a free manager for this crtc */
 255                 for (i = 0; i < num_mgrs; i++) {
 256                         if (!channel_used(dev, i))
 257                                 break;
 258                 }
 259
 260                 if (i == num_mgrs) {
 261                         /* this shouldn't really happen */
 262                         dev_err(dev->dev, "no managers left for crtc\n");
 263                         return -ENOMEM;
 264                 }
 265
 266                 ret = omap_modeset_create_crtc(dev, id, i);
 267                 if (ret < 0) {
 268                         dev_err(dev->dev,
 269                                 "could not create CRTC (channel %u)\n", i);
 270                         return ret;
 271                 }
 272         }
 273
 274         /*
 275          * Create normal planes for the remaining overlays:
 276          */
 277         for (; id < num_ovls; id++) {
 278                 struct drm_plane *plane;
 279
 280                 plane = omap_plane_init(dev, id, DRM_PLANE_TYPE_OVERLAY);
 281                 if (IS_ERR(plane))
 282                         return PTR_ERR(plane);
 283
 284                 BUG_ON(priv->num_planes >= ARRAY_SIZE(priv->planes));
 285                 priv->planes[priv->num_planes++] = plane;
 286         }
 287
 288         for (i = 0; i < priv->num_encoders; i++) {
 289                 struct drm_encoder *encoder = priv->encoders[i];
 290                 struct omap_dss_device *dssdev =
 291                                         omap_encoder_get_dssdev(encoder);
 292                 struct omap_dss_device *output;
 293
 294                 output = omapdss_find_output_from_display(dssdev);
 295
 296                 /* figure out which crtc's we can connect the encoder to: */
 297                 encoder->possible_crtcs = 0;
 298                 for (id = 0; id < priv->num_crtcs; id++) {
 299                         struct drm_crtc *crtc = priv->crtcs[id];
 300                         enum omap_channel crtc_channel;
 301
 302                         crtc_channel = omap_crtc_channel(crtc);
 303
 304                         if (output->dispc_channel == crtc_channel) {
 305                                 encoder->possible_crtcs |= (1 << id);
 306                                 break;
 307                         }
 308                 }
 309
 310                 omap_dss_put_device(output);
 311         }
 312
 313         DBG("registered %d planes, %d crtcs, %d encoders and %d connectors\n",
 314                 priv->num_planes, priv->num_crtcs, priv->num_encoders,
 315                 priv->num_connectors);
 316
 317         dev->mode_config.min_width = 32;
 318         dev->mode_config.min_height = 32;
 319
 320         /* note: eventually will need some cpu_is_omapXYZ() type stuff here
 321          * to fill in these limits properly on different OMAP generations..
 322          */
 323         dev->mode_config.max_width = 2048;
 324         dev->mode_config.max_height = 2048;
 325
 326         dev->mode_config.funcs = &omap_mode_config_funcs;
 327
 328         return 0;
 329 }
 330
 331 static void omap_modeset_free(struct drm_device *dev)
 332 {
 333         drm_mode_config_cleanup(dev);
 334 }
 335
 336 /*
 337  * drm ioctl funcs
 338  */
 339
 340
 341 static int ioctl_get_param(struct drm_device *dev, void *data,
 342                 struct drm_file *file_priv)
 343 {
 344         struct omap_drm_private *priv = dev->dev_private;
 345         struct drm_omap_param *args = data;
 346
 347         DBG("%p: param=%llu", dev, args->param);
 348
 349         switch (args->param) {
 350         case OMAP_PARAM_CHIPSET_ID:
 351                 args->value = priv->omaprev;
 352                 break;
 353         default:
 354                 DBG("unknown parameter %lld", args->param);
 355                 return -EINVAL;
 356         }
 357
 358         return 0;
 359 }
 360
 361 static int ioctl_set_param(struct drm_device *dev, void *data,
 362                 struct drm_file *file_priv)
 363 {
 364         struct drm_omap_param *args = data;
 365
 366         switch (args->param) {
 367         default:
 368                 DBG("unknown parameter %lld", args->param);
 369                 return -EINVAL;
 370         }
 371
 372         return 0;
 373 }
 374
 375 static int ioctl_gem_new(struct drm_device *dev, void *data,
 376                 struct drm_file *file_priv)
 377 {
 378         struct drm_omap_gem_new *args = data;
 379         VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
 380                         args->size.bytes, args->flags);
 381         return omap_gem_new_handle(dev, file_priv, args->size,
 382                         args->flags, &args->handle);
 383 }
 384
 385 static int ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
 386                 struct drm_file *file_priv)
 387 {
 388         struct drm_omap_gem_cpu_prep *args = data;
 389         struct drm_gem_object *obj;
 390         int ret;
 391
 392         VERB("%p:%p: handle=%d, op=%x", dev, file_priv, args->handle, args->op);
 393
 394         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 395         if (!obj)
 396                 return -ENOENT;
 397
 398         ret = omap_gem_op_sync(obj, args->op);
 399
 400         if (!ret)
 401                 ret = omap_gem_op_start(obj, args->op);
 402
 403         drm_gem_object_unreference_unlocked(obj);
 404
 405         return ret;
 406 }
 407
 408 static int ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
 409                 struct drm_file *file_priv)
 410 {
 411         struct drm_omap_gem_cpu_fini *args = data;
 412         struct drm_gem_object *obj;
 413         int ret;
 414
 415         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 416
 417         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 418         if (!obj)
 419                 return -ENOENT;
 420
 421         /* XXX flushy, flushy */
 422         ret = 0;
 423
 424         if (!ret)
 425                 ret = omap_gem_op_finish(obj, args->op);
 426
 427         drm_gem_object_unreference_unlocked(obj);
 428
 429         return ret;
 430 }
 431
 432 static int ioctl_gem_info(struct drm_device *dev, void *data,
 433                 struct drm_file *file_priv)
 434 {
 435         struct drm_omap_gem_info *args = data;
 436         struct drm_gem_object *obj;
 437         int ret = 0;
 438
 439         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 440
 441         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 442         if (!obj)
 443                 return -ENOENT;
 444
 445         args->size = omap_gem_mmap_size(obj);
 446         args->offset = omap_gem_mmap_offset(obj);
 447
 448         drm_gem_object_unreference_unlocked(obj);
 449
 450         return ret;
 451 }
 452
 453 static const struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
 454         DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param, DRM_UNLOCKED|DRM_AUTH),
 455         DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param, DRM_UNLOCKED|DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 456         DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_UNLOCKED|DRM_AUTH),
 457         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, ioctl_gem_cpu_prep, DRM_UNLOCKED|DRM_AUTH),
 458         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, ioctl_gem_cpu_fini, DRM_UNLOCKED|DRM_AUTH),
 459         DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_UNLOCKED|DRM_AUTH),
 460 };
 461
 462 /*
 463  * drm driver funcs
 464  */
 465
 466 /**
 467  * load - setup chip and create an initial config
 468  * @dev: DRM device
 469  * @flags: startup flags
 470  *
 471  * The driver load routine has to do several things:
 472  *   - initialize the memory manager
 473  *   - allocate initial config memory
 474  *   - setup the DRM framebuffer with the allocated memory
 475  */
 476 static int dev_load(struct drm_device *dev, unsigned long flags)
 477 {
 478         struct omap_drm_platform_data *pdata = dev->dev->platform_data;
 479         struct omap_drm_private *priv;
 480         int ret;
 481
 482         DBG("load: dev=%p", dev);
 483
 484         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 485         if (!priv)
 486                 return -ENOMEM;
 487
 488         priv->omaprev = pdata->omaprev;
 489
 490         dev->dev_private = priv;
 491
 492         priv->wq = alloc_ordered_workqueue("omapdrm", 0);
 493
 494         spin_lock_init(&priv->list_lock);
 495         INIT_LIST_HEAD(&priv->obj_list);
 496
 497         omap_gem_init(dev);
 498
 499         ret = omap_modeset_init(dev);
 500         if (ret) {
 501                 dev_err(dev->dev, "omap_modeset_init failed: ret=%d\n", ret);
 502                 dev->dev_private = NULL;
 503                 kfree(priv);
 504                 return ret;
 505         }
 506
 507         ret = drm_vblank_init(dev, priv->num_crtcs);
 508         if (ret)
 509                 dev_warn(dev->dev, "could not init vblank\n");
 510
 511         priv->fbdev = omap_fbdev_init(dev);
 512         if (!priv->fbdev) {
 513                 dev_warn(dev->dev, "omap_fbdev_init failed\n");
 514                 /* well, limp along without an fbdev.. maybe X11 will work? */
 515         }
 516
 517         /* store off drm_device for use in pm ops */
 518         dev_set_drvdata(dev->dev, dev);
 519
 520         drm_kms_helper_poll_init(dev);
 521
 522         return 0;
 523 }
 524
 525 static int dev_unload(struct drm_device *dev)
 526 {
 527         struct omap_drm_private *priv = dev->dev_private;
 528         int i;
 529
 530         DBG("unload: dev=%p", dev);
 531
 532         drm_kms_helper_poll_fini(dev);
 533
 534         if (priv->fbdev)
 535                 omap_fbdev_free(dev);
 536
 537         /* flush crtcs so the fbs get released */
 538         for (i = 0; i < priv->num_crtcs; i++)
 539                 omap_crtc_flush(priv->crtcs[i]);
 540
 541         omap_modeset_free(dev);
 542         omap_gem_deinit(dev);
 543
 544         destroy_workqueue(priv->wq);
 545
 546         drm_vblank_cleanup(dev);
 547         omap_drm_irq_uninstall(dev);
 548
 549         kfree(dev->dev_private);
 550         dev->dev_private = NULL;
 551
 552         dev_set_drvdata(dev->dev, NULL);
 553
 554         return 0;
 555 }
 556
 557 static int dev_open(struct drm_device *dev, struct drm_file *file)
 558 {
 559         file->driver_priv = NULL;
 560
 561         DBG("open: dev=%p, file=%p", dev, file);
 562
 563         return 0;
 564 }
 565
 566 /**
 567  * lastclose - clean up after all DRM clients have exited
 568  * @dev: DRM device
 569  *
 570  * Take care of cleaning up after all DRM clients have exited.  In the
 571  * mode setting case, we want to restore the kernel's initial mode (just
 572  * in case the last client left us in a bad state).
 573  */
 574 static void dev_lastclose(struct drm_device *dev)
 575 {
 576         int i;
 577
 578         /* we don't support vga-switcheroo.. so just make sure the fbdev
 579          * mode is active
 580          */
 581         struct omap_drm_private *priv = dev->dev_private;
 582         int ret;
 583
 584         DBG("lastclose: dev=%p", dev);
 585
 586         if (priv->rotation_prop) {
 587                 /* need to restore default rotation state.. not sure
 588                  * if there is a cleaner way to restore properties to
 589                  * default state?  Maybe a flag that properties should
 590                  * automatically be restored to default state on
 591                  * lastclose?
 592                  */
 593                 for (i = 0; i < priv->num_crtcs; i++) {
 594                         drm_object_property_set_value(&priv->crtcs[i]->base,
 595                                         priv->rotation_prop, 0);
 596                 }
 597
 598                 for (i = 0; i < priv->num_planes; i++) {
 599                         drm_object_property_set_value(&priv->planes[i]->base,
 600                                         priv->rotation_prop, 0);
 601                 }
 602         }
 603
 604         if (priv->fbdev) {
 605                 ret = drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
 606                 if (ret)
 607                         DBG("failed to restore crtc mode");
 608         }
 609 }
 610
 611 static void dev_preclose(struct drm_device *dev, struct drm_file *file)
 612 {
 613         DBG("preclose: dev=%p", dev);
 614 }
 615
 616 static void dev_postclose(struct drm_device *dev, struct drm_file *file)
 617 {
 618         DBG("postclose: dev=%p, file=%p", dev, file);
 619 }
 620
 621 static const struct vm_operations_struct omap_gem_vm_ops = {
 622         .fault = omap_gem_fault,
 623         .open = drm_gem_vm_open,
 624         .close = drm_gem_vm_close,
 625 };
 626
 627 static const struct file_operations omapdriver_fops = {
 628         .owner = THIS_MODULE,
 629         .open = drm_open,
 630         .unlocked_ioctl = drm_ioctl,
 631         .release = drm_release,
 632         .mmap = omap_gem_mmap,
 633         .poll = drm_poll,
 634         .read = drm_read,
 635         .llseek = noop_llseek,
 636 };
 637
 638 static struct drm_driver omap_drm_driver = {
 639         .driver_features = DRIVER_HAVE_IRQ | DRIVER_MODESET | DRIVER_GEM
 640                          | DRIVER_PRIME,
 641         .load = dev_load,
 642         .unload = dev_unload,
 643         .open = dev_open,
 644         .lastclose = dev_lastclose,
 645         .preclose = dev_preclose,
 646         .postclose = dev_postclose,
 647         .set_busid = drm_platform_set_busid,
 648         .get_vblank_counter = drm_vblank_count,
 649         .enable_vblank = omap_irq_enable_vblank,
 650         .disable_vblank = omap_irq_disable_vblank,
 651         .irq_preinstall = omap_irq_preinstall,
 652         .irq_postinstall = omap_irq_postinstall,
 653         .irq_uninstall = omap_irq_uninstall,
 654         .irq_handler = omap_irq_handler,
 655 #ifdef CONFIG_DEBUG_FS
 656         .debugfs_init = omap_debugfs_init,
 657         .debugfs_cleanup = omap_debugfs_cleanup,
 658 #endif
 659         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 660         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 661         .gem_prime_export = omap_gem_prime_export,
 662         .gem_prime_import = omap_gem_prime_import,
 663         .gem_free_object = omap_gem_free_object,
 664         .gem_vm_ops = &omap_gem_vm_ops,
 665         .dumb_create = omap_gem_dumb_create,
 666         .dumb_map_offset = omap_gem_dumb_map_offset,
 667         .dumb_destroy = drm_gem_dumb_destroy,
 668         .ioctls = ioctls,
 669         .num_ioctls = DRM_OMAP_NUM_IOCTLS,
 670         .fops = &omapdriver_fops,
 671         .name = DRIVER_NAME,
 672         .desc = DRIVER_DESC,
 673         .date = DRIVER_DATE,
 674         .major = DRIVER_MAJOR,
 675         .minor = DRIVER_MINOR,
 676         .patchlevel = DRIVER_PATCHLEVEL,
 677 };
 678
 679 static int pdev_probe(struct platform_device *device)
 680 {
 681         int r;
 682
 683         if (omapdss_is_initialized() == false)
 684                 return -EPROBE_DEFER;
 685
 686         omap_crtc_pre_init();
 687
 688         r = omap_connect_dssdevs();
 689         if (r) {
 690                 omap_crtc_pre_uninit();
 691                 return r;
 692         }
 693
 694         DBG("%s", device->name);
 695         return drm_platform_init(&omap_drm_driver, device);
 696 }
 697
 698 static int pdev_remove(struct platform_device *device)
 699 {
 700         DBG("");
 701
 702         drm_put_dev(platform_get_drvdata(device));
 703
 704         omap_disconnect_dssdevs();
 705         omap_crtc_pre_uninit();
 706
 707         return 0;
 708 }
 709
 710 #ifdef CONFIG_PM_SLEEP
 711 static int omap_drm_suspend(struct device *dev)
 712 {
 713         struct drm_device *drm_dev = dev_get_drvdata(dev);
 714
 715         drm_kms_helper_poll_disable(drm_dev);
 716
 717         return 0;
 718 }
 719
 720 static int omap_drm_resume(struct device *dev)
 721 {
 722         struct drm_device *drm_dev = dev_get_drvdata(dev);
 723
 724         drm_kms_helper_poll_enable(drm_dev);
 725
 726         return omap_gem_resume(dev);
 727 }
 728 #endif
 729
 730 static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume);
 731
 732 static struct platform_driver pdev = {
 733         .driver = {
 734                 .name = DRIVER_NAME,
 735                 .pm = &omapdrm_pm_ops,
 736         },
 737         .probe = pdev_probe,
 738         .remove = pdev_remove,
 739 };
 740
 741 static int __init omap_drm_init(void)
 742 {
 743         int r;
 744
 745         DBG("init");
 746
 747         r = platform_driver_register(&omap_dmm_driver);
 748         if (r) {
 749                 pr_err("DMM driver registration failed\n");
 750                 return r;
 751         }
 752
 753         r = platform_driver_register(&pdev);
 754         if (r) {
 755                 pr_err("omapdrm driver registration failed\n");
 756                 platform_driver_unregister(&omap_dmm_driver);
 757                 return r;
 758         }
 759
 760         return 0;
 761 }
 762
 763 static void __exit omap_drm_fini(void)
 764 {
 765         DBG("fini");
 766
 767         platform_driver_unregister(&pdev);
 768
 769         platform_driver_unregister(&omap_dmm_driver);
 770 }
 771
 772 /* need late_initcall() so we load after dss_driver's are loaded */
 773 late_initcall(omap_drm_init);
 774 module_exit(omap_drm_fini);
 775
 776 MODULE_AUTHOR("Rob Clark <rob@ti.com>");
 777 MODULE_DESCRIPTION("OMAP DRM Display Driver");
 778 MODULE_ALIAS("platform:" DRIVER_NAME);
 779 MODULE_LICENSE("GPL v2");