Pileus Git - ~andy/linux/blob - drivers/staging/omapdrm/omap_drv.c

   1 /*
   2  * drivers/staging/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
  25 #define DRIVER_NAME             MODULE_NAME
  26 #define DRIVER_DESC             "OMAP DRM"
  27 #define DRIVER_DATE             "20110917"
  28 #define DRIVER_MAJOR            1
  29 #define DRIVER_MINOR            0
  30 #define DRIVER_PATCHLEVEL       0
  31
  32 struct drm_device *drm_device;
  33
  34 static int num_crtc = CONFIG_DRM_OMAP_NUM_CRTCS;
  35
  36 MODULE_PARM_DESC(num_crtc, "Number of overlays to use as CRTCs");
  37 module_param(num_crtc, int, 0600);
  38
  39 /*
  40  * mode config funcs
  41  */
  42
  43 /* Notes about mapping DSS and DRM entities:
  44  *    CRTC:        overlay
  45  *    encoder:     manager.. with some extension to allow one primary CRTC
  46  *                 and zero or more video CRTC's to be mapped to one encoder?
  47  *    connector:   dssdev.. manager can be attached/detached from different
  48  *                 devices
  49  */
  50
  51 static void omap_fb_output_poll_changed(struct drm_device *dev)
  52 {
  53         struct omap_drm_private *priv = dev->dev_private;
  54         DBG("dev=%p", dev);
  55         if (priv->fbdev) {
  56                 drm_fb_helper_hotplug_event(priv->fbdev);
  57         }
  58 }
  59
  60 static struct drm_mode_config_funcs omap_mode_config_funcs = {
  61         .fb_create = omap_framebuffer_create,
  62         .output_poll_changed = omap_fb_output_poll_changed,
  63 };
  64
  65 static int get_connector_type(struct omap_dss_device *dssdev)
  66 {
  67         switch (dssdev->type) {
  68         case OMAP_DISPLAY_TYPE_HDMI:
  69                 return DRM_MODE_CONNECTOR_HDMIA;
  70         case OMAP_DISPLAY_TYPE_DPI:
  71                 if (!strcmp(dssdev->name, "dvi"))
  72                         return DRM_MODE_CONNECTOR_DVID;
  73                 /* fallthrough */
  74         default:
  75                 return DRM_MODE_CONNECTOR_Unknown;
  76         }
  77 }
  78
  79 #if 0 /* enable when dss2 supports hotplug */
  80 static int omap_drm_notifier(struct notifier_block *nb,
  81                 unsigned long evt, void *arg)
  82 {
  83         switch (evt) {
  84         case OMAP_DSS_SIZE_CHANGE:
  85         case OMAP_DSS_HOTPLUG_CONNECT:
  86         case OMAP_DSS_HOTPLUG_DISCONNECT: {
  87                 struct drm_device *dev = drm_device;
  88                 DBG("hotplug event: evt=%d, dev=%p", evt, dev);
  89                 if (dev) {
  90                         drm_sysfs_hotplug_event(dev);
  91                 }
  92                 return NOTIFY_OK;
  93         }
  94         default:  /* don't care about other events for now */
  95                 return NOTIFY_DONE;
  96         }
  97 }
  98 #endif
  99
 100 static void dump_video_chains(void)
 101 {
 102         int i;
 103
 104         DBG("dumping video chains: ");
 105         for (i = 0; i < omap_dss_get_num_overlays(); i++) {
 106                 struct omap_overlay *ovl = omap_dss_get_overlay(i);
 107                 struct omap_overlay_manager *mgr = ovl->manager;
 108                 struct omap_dss_device *dssdev = mgr ? mgr->device : NULL;
 109                 if (dssdev) {
 110                         DBG("%d: %s -> %s -> %s", i, ovl->name, mgr->name,
 111                                                 dssdev->name);
 112                 } else if (mgr) {
 113                         DBG("%d: %s -> %s", i, ovl->name, mgr->name);
 114                 } else {
 115                         DBG("%d: %s", i, ovl->name);
 116                 }
 117         }
 118 }
 119
 120 /* create encoders for each manager */
 121 static int create_encoder(struct drm_device *dev,
 122                 struct omap_overlay_manager *mgr)
 123 {
 124         struct omap_drm_private *priv = dev->dev_private;
 125         struct drm_encoder *encoder = omap_encoder_init(dev, mgr);
 126
 127         if (!encoder) {
 128                 dev_err(dev->dev, "could not create encoder: %s\n",
 129                                 mgr->name);
 130                 return -ENOMEM;
 131         }
 132
 133         BUG_ON(priv->num_encoders >= ARRAY_SIZE(priv->encoders));
 134
 135         priv->encoders[priv->num_encoders++] = encoder;
 136
 137         return 0;
 138 }
 139
 140 /* create connectors for each display device */
 141 static int create_connector(struct drm_device *dev,
 142                 struct omap_dss_device *dssdev)
 143 {
 144         struct omap_drm_private *priv = dev->dev_private;
 145         static struct notifier_block *notifier;
 146         struct drm_connector *connector;
 147         int j;
 148
 149         if (!dssdev->driver) {
 150                 dev_warn(dev->dev, "%s has no driver.. skipping it\n",
 151                                 dssdev->name);
 152                 return 0;
 153         }
 154
 155         if (!(dssdev->driver->get_timings ||
 156                                 dssdev->driver->read_edid)) {
 157                 dev_warn(dev->dev, "%s driver does not support "
 158                         "get_timings or read_edid.. skipping it!\n",
 159                         dssdev->name);
 160                 return 0;
 161         }
 162
 163         connector = omap_connector_init(dev,
 164                         get_connector_type(dssdev), dssdev);
 165
 166         if (!connector) {
 167                 dev_err(dev->dev, "could not create connector: %s\n",
 168                                 dssdev->name);
 169                 return -ENOMEM;
 170         }
 171
 172         BUG_ON(priv->num_connectors >= ARRAY_SIZE(priv->connectors));
 173
 174         priv->connectors[priv->num_connectors++] = connector;
 175
 176 #if 0 /* enable when dss2 supports hotplug */
 177         notifier = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
 178         notifier->notifier_call = omap_drm_notifier;
 179         omap_dss_add_notify(dssdev, notifier);
 180 #else
 181         notifier = NULL;
 182 #endif
 183
 184         for (j = 0; j < priv->num_encoders; j++) {
 185                 struct omap_overlay_manager *mgr =
 186                         omap_encoder_get_manager(priv->encoders[j]);
 187                 if (mgr->device == dssdev) {
 188                         drm_mode_connector_attach_encoder(connector,
 189                                         priv->encoders[j]);
 190                 }
 191         }
 192
 193         return 0;
 194 }
 195
 196 /* create up to max_overlays CRTCs mapping to overlays.. by default,
 197  * connect the overlays to different managers/encoders, giving priority
 198  * to encoders connected to connectors with a detected connection
 199  */
 200 static int create_crtc(struct drm_device *dev, struct omap_overlay *ovl,
 201                 int *j, unsigned int connected_connectors)
 202 {
 203         struct omap_drm_private *priv = dev->dev_private;
 204         struct omap_overlay_manager *mgr = NULL;
 205         struct drm_crtc *crtc;
 206
 207         if (ovl->manager) {
 208                 DBG("disconnecting %s from %s", ovl->name,
 209                                         ovl->manager->name);
 210                 ovl->unset_manager(ovl);
 211         }
 212
 213         /* find next best connector, ones with detected connection first
 214          */
 215         while (*j < priv->num_connectors && !mgr) {
 216                 if (connected_connectors & (1 << *j)) {
 217                         struct drm_encoder *encoder =
 218                                 omap_connector_attached_encoder(
 219                                                 priv->connectors[*j]);
 220                         if (encoder) {
 221                                 mgr = omap_encoder_get_manager(encoder);
 222                         }
 223                 }
 224                 (*j)++;
 225         }
 226
 227         /* if we couldn't find another connected connector, lets start
 228          * looking at the unconnected connectors:
 229          *
 230          * note: it might not be immediately apparent, but thanks to
 231          * the !mgr check in both this loop and the one above, the only
 232          * way to enter this loop is with *j == priv->num_connectors,
 233          * so idx can never go negative.
 234          */
 235         while (*j < 2 * priv->num_connectors && !mgr) {
 236                 int idx = *j - priv->num_connectors;
 237                 if (!(connected_connectors & (1 << idx))) {
 238                         struct drm_encoder *encoder =
 239                                 omap_connector_attached_encoder(
 240                                                 priv->connectors[idx]);
 241                         if (encoder) {
 242                                 mgr = omap_encoder_get_manager(encoder);
 243                         }
 244                 }
 245                 (*j)++;
 246         }
 247
 248         if (mgr) {
 249                 DBG("connecting %s to %s", ovl->name, mgr->name);
 250                 ovl->set_manager(ovl, mgr);
 251         }
 252
 253         crtc = omap_crtc_init(dev, ovl, priv->num_crtcs);
 254
 255         if (!crtc) {
 256                 dev_err(dev->dev, "could not create CRTC: %s\n",
 257                                 ovl->name);
 258                 return -ENOMEM;
 259         }
 260
 261         BUG_ON(priv->num_crtcs >= ARRAY_SIZE(priv->crtcs));
 262
 263         priv->crtcs[priv->num_crtcs++] = crtc;
 264
 265         return 0;
 266 }
 267
 268 static int match_dev_name(struct omap_dss_device *dssdev, void *data)
 269 {
 270         return !strcmp(dssdev->name, data);
 271 }
 272
 273 static unsigned int detect_connectors(struct drm_device *dev)
 274 {
 275         struct omap_drm_private *priv = dev->dev_private;
 276         unsigned int connected_connectors = 0;
 277         int i;
 278
 279         for (i = 0; i < priv->num_connectors; i++) {
 280                 struct drm_connector *connector = priv->connectors[i];
 281                 if (omap_connector_detect(connector, true) ==
 282                                 connector_status_connected) {
 283                         connected_connectors |= (1 << i);
 284                 }
 285         }
 286
 287         return connected_connectors;
 288 }
 289
 290 static int omap_modeset_init(struct drm_device *dev)
 291 {
 292         const struct omap_drm_platform_data *pdata = dev->dev->platform_data;
 293         struct omap_kms_platform_data *kms_pdata = NULL;
 294         struct omap_drm_private *priv = dev->dev_private;
 295         struct omap_dss_device *dssdev = NULL;
 296         int i, j;
 297         unsigned int connected_connectors = 0;
 298
 299         drm_mode_config_init(dev);
 300
 301         if (pdata && pdata->kms_pdata) {
 302                 kms_pdata = pdata->kms_pdata;
 303
 304                 /* if platform data is provided by the board file, use it to
 305                  * control which overlays, managers, and devices we own.
 306                  */
 307                 for (i = 0; i < kms_pdata->mgr_cnt; i++) {
 308                         struct omap_overlay_manager *mgr =
 309                                 omap_dss_get_overlay_manager(
 310                                                 kms_pdata->mgr_ids[i]);
 311                         create_encoder(dev, mgr);
 312                 }
 313
 314                 for (i = 0; i < kms_pdata->dev_cnt; i++) {
 315                         struct omap_dss_device *dssdev =
 316                                 omap_dss_find_device(
 317                                         (void *)kms_pdata->dev_names[i],
 318                                         match_dev_name);
 319                         if (!dssdev) {
 320                                 dev_warn(dev->dev, "no such dssdev: %s\n",
 321                                                 kms_pdata->dev_names[i]);
 322                                 continue;
 323                         }
 324                         create_connector(dev, dssdev);
 325                 }
 326
 327                 connected_connectors = detect_connectors(dev);
 328
 329                 j = 0;
 330                 for (i = 0; i < kms_pdata->ovl_cnt; i++) {
 331                         struct omap_overlay *ovl =
 332                                 omap_dss_get_overlay(kms_pdata->ovl_ids[i]);
 333                         create_crtc(dev, ovl, &j, connected_connectors);
 334                 }
 335         } else {
 336                 /* otherwise just grab up to CONFIG_DRM_OMAP_NUM_CRTCS and try
 337                  * to make educated guesses about everything else
 338                  */
 339                 int max_overlays = min(omap_dss_get_num_overlays(), num_crtc);
 340
 341                 for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
 342                         create_encoder(dev, omap_dss_get_overlay_manager(i));
 343                 }
 344
 345                 for_each_dss_dev(dssdev) {
 346                         create_connector(dev, dssdev);
 347                 }
 348
 349                 connected_connectors = detect_connectors(dev);
 350
 351                 j = 0;
 352                 for (i = 0; i < max_overlays; i++) {
 353                         create_crtc(dev, omap_dss_get_overlay(i),
 354                                         &j, connected_connectors);
 355                 }
 356         }
 357
 358         /* for now keep the mapping of CRTCs and encoders static.. */
 359         for (i = 0; i < priv->num_encoders; i++) {
 360                 struct drm_encoder *encoder = priv->encoders[i];
 361                 struct omap_overlay_manager *mgr =
 362                                 omap_encoder_get_manager(encoder);
 363
 364                 encoder->possible_crtcs = 0;
 365
 366                 for (j = 0; j < priv->num_crtcs; j++) {
 367                         struct omap_overlay *ovl =
 368                                         omap_crtc_get_overlay(priv->crtcs[j]);
 369                         if (ovl->manager == mgr) {
 370                                 encoder->possible_crtcs |= (1 << j);
 371                         }
 372                 }
 373
 374                 DBG("%s: possible_crtcs=%08x", mgr->name,
 375                                         encoder->possible_crtcs);
 376         }
 377
 378         dump_video_chains();
 379
 380         dev->mode_config.min_width = 256;
 381         dev->mode_config.min_height = 256;
 382
 383         /* note: eventually will need some cpu_is_omapXYZ() type stuff here
 384          * to fill in these limits properly on different OMAP generations..
 385          */
 386         dev->mode_config.max_width = 2048;
 387         dev->mode_config.max_height = 2048;
 388
 389         dev->mode_config.funcs = &omap_mode_config_funcs;
 390
 391         return 0;
 392 }
 393
 394 static void omap_modeset_free(struct drm_device *dev)
 395 {
 396         drm_mode_config_cleanup(dev);
 397 }
 398
 399 /*
 400  * drm ioctl funcs
 401  */
 402
 403
 404 static int ioctl_get_param(struct drm_device *dev, void *data,
 405                 struct drm_file *file_priv)
 406 {
 407         struct drm_omap_param *args = data;
 408
 409         DBG("%p: param=%llu", dev, args->param);
 410
 411         switch (args->param) {
 412         case OMAP_PARAM_CHIPSET_ID:
 413                 args->value = GET_OMAP_TYPE;
 414                 break;
 415         default:
 416                 DBG("unknown parameter %lld", args->param);
 417                 return -EINVAL;
 418         }
 419
 420         return 0;
 421 }
 422
 423 static int ioctl_set_param(struct drm_device *dev, void *data,
 424                 struct drm_file *file_priv)
 425 {
 426         struct drm_omap_param *args = data;
 427
 428         switch (args->param) {
 429         default:
 430                 DBG("unknown parameter %lld", args->param);
 431                 return -EINVAL;
 432         }
 433
 434         return 0;
 435 }
 436
 437 static int ioctl_gem_new(struct drm_device *dev, void *data,
 438                 struct drm_file *file_priv)
 439 {
 440         struct drm_omap_gem_new *args = data;
 441         DBG("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
 442                         args->size.bytes, args->flags);
 443         return omap_gem_new_handle(dev, file_priv, args->size,
 444                         args->flags, &args->handle);
 445 }
 446
 447 static int ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
 448                 struct drm_file *file_priv)
 449 {
 450         struct drm_omap_gem_cpu_prep *args = data;
 451         struct drm_gem_object *obj;
 452         int ret;
 453
 454         VERB("%p:%p: handle=%d, op=%x", dev, file_priv, args->handle, args->op);
 455
 456         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 457         if (!obj) {
 458                 return -ENOENT;
 459         }
 460
 461         ret = omap_gem_op_sync(obj, args->op);
 462
 463         if (!ret) {
 464                 ret = omap_gem_op_start(obj, args->op);
 465         }
 466
 467         drm_gem_object_unreference_unlocked(obj);
 468
 469         return ret;
 470 }
 471
 472 static int ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
 473                 struct drm_file *file_priv)
 474 {
 475         struct drm_omap_gem_cpu_fini *args = data;
 476         struct drm_gem_object *obj;
 477         int ret;
 478
 479         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 480
 481         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 482         if (!obj) {
 483                 return -ENOENT;
 484         }
 485
 486         /* XXX flushy, flushy */
 487         ret = 0;
 488
 489         if (!ret) {
 490                 ret = omap_gem_op_finish(obj, args->op);
 491         }
 492
 493         drm_gem_object_unreference_unlocked(obj);
 494
 495         return ret;
 496 }
 497
 498 static int ioctl_gem_info(struct drm_device *dev, void *data,
 499                 struct drm_file *file_priv)
 500 {
 501         struct drm_omap_gem_info *args = data;
 502         struct drm_gem_object *obj;
 503         int ret = 0;
 504
 505         DBG("%p:%p: handle=%d", dev, file_priv, args->handle);
 506
 507         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 508         if (!obj) {
 509                 return -ENOENT;
 510         }
 511
 512         args->size = omap_gem_mmap_size(obj);
 513         args->offset = omap_gem_mmap_offset(obj);
 514
 515         drm_gem_object_unreference_unlocked(obj);
 516
 517         return ret;
 518 }
 519
 520 struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
 521         DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param, DRM_UNLOCKED|DRM_AUTH),
 522         DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param, DRM_UNLOCKED|DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 523         DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_UNLOCKED|DRM_AUTH),
 524         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, ioctl_gem_cpu_prep, DRM_UNLOCKED|DRM_AUTH),
 525         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, ioctl_gem_cpu_fini, DRM_UNLOCKED|DRM_AUTH),
 526         DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_UNLOCKED|DRM_AUTH),
 527 };
 528
 529 /*
 530  * drm driver funcs
 531  */
 532
 533 /**
 534  * load - setup chip and create an initial config
 535  * @dev: DRM device
 536  * @flags: startup flags
 537  *
 538  * The driver load routine has to do several things:
 539  *   - initialize the memory manager
 540  *   - allocate initial config memory
 541  *   - setup the DRM framebuffer with the allocated memory
 542  */
 543 static int dev_load(struct drm_device *dev, unsigned long flags)
 544 {
 545         struct omap_drm_private *priv;
 546         int ret;
 547
 548         DBG("load: dev=%p", dev);
 549
 550         drm_device = dev;
 551
 552         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 553         if (!priv) {
 554                 dev_err(dev->dev, "could not allocate priv\n");
 555                 return -ENOMEM;
 556         }
 557
 558         dev->dev_private = priv;
 559
 560         omap_gem_init(dev);
 561
 562         ret = omap_modeset_init(dev);
 563         if (ret) {
 564                 dev_err(dev->dev, "omap_modeset_init failed: ret=%d\n", ret);
 565                 dev->dev_private = NULL;
 566                 kfree(priv);
 567                 return ret;
 568         }
 569
 570         priv->fbdev = omap_fbdev_init(dev);
 571         if (!priv->fbdev) {
 572                 dev_warn(dev->dev, "omap_fbdev_init failed\n");
 573                 /* well, limp along without an fbdev.. maybe X11 will work? */
 574         }
 575
 576         drm_kms_helper_poll_init(dev);
 577
 578         ret = drm_vblank_init(dev, priv->num_crtcs);
 579         if (ret) {
 580                 dev_warn(dev->dev, "could not init vblank\n");
 581         }
 582
 583         return 0;
 584 }
 585
 586 static int dev_unload(struct drm_device *dev)
 587 {
 588         DBG("unload: dev=%p", dev);
 589
 590         drm_vblank_cleanup(dev);
 591         drm_kms_helper_poll_fini(dev);
 592
 593         omap_fbdev_free(dev);
 594         omap_modeset_free(dev);
 595         omap_gem_deinit(dev);
 596
 597         kfree(dev->dev_private);
 598         dev->dev_private = NULL;
 599
 600         return 0;
 601 }
 602
 603 static int dev_open(struct drm_device *dev, struct drm_file *file)
 604 {
 605         file->driver_priv = NULL;
 606
 607         DBG("open: dev=%p, file=%p", dev, file);
 608
 609         return 0;
 610 }
 611
 612 static int dev_firstopen(struct drm_device *dev)
 613 {
 614         DBG("firstopen: dev=%p", dev);
 615         return 0;
 616 }
 617
 618 /**
 619  * lastclose - clean up after all DRM clients have exited
 620  * @dev: DRM device
 621  *
 622  * Take care of cleaning up after all DRM clients have exited.  In the
 623  * mode setting case, we want to restore the kernel's initial mode (just
 624  * in case the last client left us in a bad state).
 625  */
 626 static void dev_lastclose(struct drm_device *dev)
 627 {
 628         /* we don't support vga-switcheroo.. so just make sure the fbdev
 629          * mode is active
 630          */
 631         struct omap_drm_private *priv = dev->dev_private;
 632         int ret;
 633
 634         DBG("lastclose: dev=%p", dev);
 635
 636         ret = drm_fb_helper_restore_fbdev_mode(priv->fbdev);
 637         if (ret)
 638                 DBG("failed to restore crtc mode");
 639 }
 640
 641 static void dev_preclose(struct drm_device *dev, struct drm_file *file)
 642 {
 643         DBG("preclose: dev=%p", dev);
 644 }
 645
 646 static void dev_postclose(struct drm_device *dev, struct drm_file *file)
 647 {
 648         DBG("postclose: dev=%p, file=%p", dev, file);
 649 }
 650
 651 /**
 652  * enable_vblank - enable vblank interrupt events
 653  * @dev: DRM device
 654  * @crtc: which irq to enable
 655  *
 656  * Enable vblank interrupts for @crtc.  If the device doesn't have
 657  * a hardware vblank counter, this routine should be a no-op, since
 658  * interrupts will have to stay on to keep the count accurate.
 659  *
 660  * RETURNS
 661  * Zero on success, appropriate errno if the given @crtc's vblank
 662  * interrupt cannot be enabled.
 663  */
 664 static int dev_enable_vblank(struct drm_device *dev, int crtc)
 665 {
 666         DBG("enable_vblank: dev=%p, crtc=%d", dev, crtc);
 667         return 0;
 668 }
 669
 670 /**
 671  * disable_vblank - disable vblank interrupt events
 672  * @dev: DRM device
 673  * @crtc: which irq to enable
 674  *
 675  * Disable vblank interrupts for @crtc.  If the device doesn't have
 676  * a hardware vblank counter, this routine should be a no-op, since
 677  * interrupts will have to stay on to keep the count accurate.
 678  */
 679 static void dev_disable_vblank(struct drm_device *dev, int crtc)
 680 {
 681         DBG("disable_vblank: dev=%p, crtc=%d", dev, crtc);
 682 }
 683
 684 static irqreturn_t dev_irq_handler(DRM_IRQ_ARGS)
 685 {
 686         return IRQ_HANDLED;
 687 }
 688
 689 static void dev_irq_preinstall(struct drm_device *dev)
 690 {
 691         DBG("irq_preinstall: dev=%p", dev);
 692 }
 693
 694 static int dev_irq_postinstall(struct drm_device *dev)
 695 {
 696         DBG("irq_postinstall: dev=%p", dev);
 697         return 0;
 698 }
 699
 700 static void dev_irq_uninstall(struct drm_device *dev)
 701 {
 702         DBG("irq_uninstall: dev=%p", dev);
 703 }
 704
 705 static struct vm_operations_struct omap_gem_vm_ops = {
 706         .fault = omap_gem_fault,
 707         .open = drm_gem_vm_open,
 708         .close = drm_gem_vm_close,
 709 };
 710
 711 static struct drm_driver omap_drm_driver = {
 712                 .driver_features =
 713                                 DRIVER_HAVE_IRQ | DRIVER_MODESET | DRIVER_GEM,
 714                 .load = dev_load,
 715                 .unload = dev_unload,
 716                 .open = dev_open,
 717                 .firstopen = dev_firstopen,
 718                 .lastclose = dev_lastclose,
 719                 .preclose = dev_preclose,
 720                 .postclose = dev_postclose,
 721                 .get_vblank_counter = drm_vblank_count,
 722                 .enable_vblank = dev_enable_vblank,
 723                 .disable_vblank = dev_disable_vblank,
 724                 .irq_preinstall = dev_irq_preinstall,
 725                 .irq_postinstall = dev_irq_postinstall,
 726                 .irq_uninstall = dev_irq_uninstall,
 727                 .irq_handler = dev_irq_handler,
 728                 .reclaim_buffers = drm_core_reclaim_buffers,
 729 #ifdef CONFIG_DEBUG_FS
 730                 .debugfs_init = omap_debugfs_init,
 731                 .debugfs_cleanup = omap_debugfs_cleanup,
 732 #endif
 733                 .gem_init_object = omap_gem_init_object,
 734                 .gem_free_object = omap_gem_free_object,
 735                 .gem_vm_ops = &omap_gem_vm_ops,
 736                 .dumb_create = omap_gem_dumb_create,
 737                 .dumb_map_offset = omap_gem_dumb_map_offset,
 738                 .dumb_destroy = omap_gem_dumb_destroy,
 739                 .ioctls = ioctls,
 740                 .num_ioctls = DRM_OMAP_NUM_IOCTLS,
 741                 .fops = {
 742                                 .owner = THIS_MODULE,
 743                                 .open = drm_open,
 744                                 .unlocked_ioctl = drm_ioctl,
 745                                 .release = drm_release,
 746                                 .mmap = omap_gem_mmap,
 747                                 .poll = drm_poll,
 748                                 .fasync = drm_fasync,
 749                                 .read = drm_read,
 750                                 .llseek = noop_llseek,
 751                 },
 752                 .name = DRIVER_NAME,
 753                 .desc = DRIVER_DESC,
 754                 .date = DRIVER_DATE,
 755                 .major = DRIVER_MAJOR,
 756                 .minor = DRIVER_MINOR,
 757                 .patchlevel = DRIVER_PATCHLEVEL,
 758 };
 759
 760 static int pdev_suspend(struct platform_device *pDevice, pm_message_t state)
 761 {
 762         DBG("");
 763         return 0;
 764 }
 765
 766 static int pdev_resume(struct platform_device *device)
 767 {
 768         DBG("");
 769         return 0;
 770 }
 771
 772 static void pdev_shutdown(struct platform_device *device)
 773 {
 774         DBG("");
 775 }
 776
 777 static int pdev_probe(struct platform_device *device)
 778 {
 779         DBG("%s", device->name);
 780         return drm_platform_init(&omap_drm_driver, device);
 781 }
 782
 783 static int pdev_remove(struct platform_device *device)
 784 {
 785         DBG("");
 786         drm_platform_exit(&omap_drm_driver, device);
 787         return 0;
 788 }
 789
 790 struct platform_driver pdev = {
 791                 .driver = {
 792                         .name = DRIVER_NAME,
 793                         .owner = THIS_MODULE,
 794                 },
 795                 .probe = pdev_probe,
 796                 .remove = pdev_remove,
 797                 .suspend = pdev_suspend,
 798                 .resume = pdev_resume,
 799                 .shutdown = pdev_shutdown,
 800 };
 801
 802 static int __init omap_drm_init(void)
 803 {
 804         DBG("init");
 805         return platform_driver_register(&pdev);
 806 }
 807
 808 static void __exit omap_drm_fini(void)
 809 {
 810         DBG("fini");
 811         platform_driver_unregister(&pdev);
 812 }
 813
 814 /* need late_initcall() so we load after dss_driver's are loaded */
 815 late_initcall(omap_drm_init);
 816 module_exit(omap_drm_fini);
 817
 818 MODULE_AUTHOR("Rob Clark <rob@ti.com>");
 819 MODULE_DESCRIPTION("OMAP DRM Display Driver");
 820 MODULE_ALIAS("platform:" DRIVER_NAME);
 821 MODULE_LICENSE("GPL v2");