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