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 #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 struct drm_device *drm_device;
  34
  35 static int num_crtc = CONFIG_DRM_OMAP_NUM_CRTCS;
  36
  37 MODULE_PARM_DESC(num_crtc, "Number of overlays to use as CRTCs");
  38 module_param(num_crtc, int, 0600);
  39
  40 /*
  41  * mode config funcs
  42  */
  43
  44 /* Notes about mapping DSS and DRM entities:
  45  *    CRTC:        overlay
  46  *    encoder:     manager.. with some extension to allow one primary CRTC
  47  *                 and zero or more video CRTC's to be mapped to one encoder?
  48  *    connector:   dssdev.. manager can be attached/detached from different
  49  *                 devices
  50  */
  51
  52 static void omap_fb_output_poll_changed(struct drm_device *dev)
  53 {
  54         struct omap_drm_private *priv = dev->dev_private;
  55         DBG("dev=%p", dev);
  56         if (priv->fbdev) {
  57                 drm_fb_helper_hotplug_event(priv->fbdev);
  58         }
  59 }
  60
  61 static struct drm_mode_config_funcs omap_mode_config_funcs = {
  62         .fb_create = omap_framebuffer_create,
  63         .output_poll_changed = omap_fb_output_poll_changed,
  64 };
  65
  66 static int get_connector_type(struct omap_dss_device *dssdev)
  67 {
  68         switch (dssdev->type) {
  69         case OMAP_DISPLAY_TYPE_HDMI:
  70                 return DRM_MODE_CONNECTOR_HDMIA;
  71         case OMAP_DISPLAY_TYPE_DPI:
  72                 if (!strcmp(dssdev->name, "dvi"))
  73                         return DRM_MODE_CONNECTOR_DVID;
  74                 /* fallthrough */
  75         default:
  76                 return DRM_MODE_CONNECTOR_Unknown;
  77         }
  78 }
  79
  80 #if 0 /* enable when dss2 supports hotplug */
  81 static int omap_drm_notifier(struct notifier_block *nb,
  82                 unsigned long evt, void *arg)
  83 {
  84         switch (evt) {
  85         case OMAP_DSS_SIZE_CHANGE:
  86         case OMAP_DSS_HOTPLUG_CONNECT:
  87         case OMAP_DSS_HOTPLUG_DISCONNECT: {
  88                 struct drm_device *dev = drm_device;
  89                 DBG("hotplug event: evt=%d, dev=%p", evt, dev);
  90                 if (dev) {
  91                         drm_sysfs_hotplug_event(dev);
  92                 }
  93                 return NOTIFY_OK;
  94         }
  95         default:  /* don't care about other events for now */
  96                 return NOTIFY_DONE;
  97         }
  98 }
  99 #endif
 100
 101 static void dump_video_chains(void)
 102 {
 103         int i;
 104
 105         DBG("dumping video chains: ");
 106         for (i = 0; i < omap_dss_get_num_overlays(); i++) {
 107                 struct omap_overlay *ovl = omap_dss_get_overlay(i);
 108                 struct omap_overlay_manager *mgr = ovl->manager;
 109                 struct omap_dss_device *dssdev = mgr ? mgr->device : NULL;
 110                 if (dssdev) {
 111                         DBG("%d: %s -> %s -> %s", i, ovl->name, mgr->name,
 112                                                 dssdev->name);
 113                 } else if (mgr) {
 114                         DBG("%d: %s -> %s", i, ovl->name, mgr->name);
 115                 } else {
 116                         DBG("%d: %s", i, ovl->name);
 117                 }
 118         }
 119 }
 120
 121 /* create encoders for each manager */
 122 static int create_encoder(struct drm_device *dev,
 123                 struct omap_overlay_manager *mgr)
 124 {
 125         struct omap_drm_private *priv = dev->dev_private;
 126         struct drm_encoder *encoder = omap_encoder_init(dev, mgr);
 127
 128         if (!encoder) {
 129                 dev_err(dev->dev, "could not create encoder: %s\n",
 130                                 mgr->name);
 131                 return -ENOMEM;
 132         }
 133
 134         BUG_ON(priv->num_encoders >= ARRAY_SIZE(priv->encoders));
 135
 136         priv->encoders[priv->num_encoders++] = encoder;
 137
 138         return 0;
 139 }
 140
 141 /* create connectors for each display device */
 142 static int create_connector(struct drm_device *dev,
 143                 struct omap_dss_device *dssdev)
 144 {
 145         struct omap_drm_private *priv = dev->dev_private;
 146         static struct notifier_block *notifier;
 147         struct drm_connector *connector;
 148         int j;
 149
 150         if (!dssdev->driver) {
 151                 dev_warn(dev->dev, "%s has no driver.. skipping it\n",
 152                                 dssdev->name);
 153                 return 0;
 154         }
 155
 156         if (!(dssdev->driver->get_timings ||
 157                                 dssdev->driver->read_edid)) {
 158                 dev_warn(dev->dev, "%s driver does not support "
 159                         "get_timings or read_edid.. skipping it!\n",
 160                         dssdev->name);
 161                 return 0;
 162         }
 163
 164         connector = omap_connector_init(dev,
 165                         get_connector_type(dssdev), dssdev);
 166
 167         if (!connector) {
 168                 dev_err(dev->dev, "could not create connector: %s\n",
 169                                 dssdev->name);
 170                 return -ENOMEM;
 171         }
 172
 173         BUG_ON(priv->num_connectors >= ARRAY_SIZE(priv->connectors));
 174
 175         priv->connectors[priv->num_connectors++] = connector;
 176
 177 #if 0 /* enable when dss2 supports hotplug */
 178         notifier = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
 179         notifier->notifier_call = omap_drm_notifier;
 180         omap_dss_add_notify(dssdev, notifier);
 181 #else
 182         notifier = NULL;
 183 #endif
 184
 185         for (j = 0; j < priv->num_encoders; j++) {
 186                 struct omap_overlay_manager *mgr =
 187                         omap_encoder_get_manager(priv->encoders[j]);
 188                 if (mgr->device == dssdev) {
 189                         drm_mode_connector_attach_encoder(connector,
 190                                         priv->encoders[j]);
 191                 }
 192         }
 193
 194         return 0;
 195 }
 196
 197 /* create up to max_overlays CRTCs mapping to overlays.. by default,
 198  * connect the overlays to different managers/encoders, giving priority
 199  * to encoders connected to connectors with a detected connection
 200  */
 201 static int create_crtc(struct drm_device *dev, struct omap_overlay *ovl,
 202                 int *j, unsigned int connected_connectors)
 203 {
 204         struct omap_drm_private *priv = dev->dev_private;
 205         struct omap_overlay_manager *mgr = NULL;
 206         struct drm_crtc *crtc;
 207
 208         /* find next best connector, ones with detected connection first
 209          */
 210         while (*j < priv->num_connectors && !mgr) {
 211                 if (connected_connectors & (1 << *j)) {
 212                         struct drm_encoder *encoder =
 213                                 omap_connector_attached_encoder(
 214                                                 priv->connectors[*j]);
 215                         if (encoder) {
 216                                 mgr = omap_encoder_get_manager(encoder);
 217                         }
 218                 }
 219                 (*j)++;
 220         }
 221
 222         /* if we couldn't find another connected connector, lets start
 223          * looking at the unconnected connectors:
 224          *
 225          * note: it might not be immediately apparent, but thanks to
 226          * the !mgr check in both this loop and the one above, the only
 227          * way to enter this loop is with *j == priv->num_connectors,
 228          * so idx can never go negative.
 229          */
 230         while (*j < 2 * priv->num_connectors && !mgr) {
 231                 int idx = *j - priv->num_connectors;
 232                 if (!(connected_connectors & (1 << idx))) {
 233                         struct drm_encoder *encoder =
 234                                 omap_connector_attached_encoder(
 235                                                 priv->connectors[idx]);
 236                         if (encoder) {
 237                                 mgr = omap_encoder_get_manager(encoder);
 238                         }
 239                 }
 240                 (*j)++;
 241         }
 242
 243         crtc = omap_crtc_init(dev, ovl, priv->num_crtcs);
 244
 245         if (!crtc) {
 246                 dev_err(dev->dev, "could not create CRTC: %s\n",
 247                                 ovl->name);
 248                 return -ENOMEM;
 249         }
 250
 251         BUG_ON(priv->num_crtcs >= ARRAY_SIZE(priv->crtcs));
 252
 253         priv->crtcs[priv->num_crtcs++] = crtc;
 254
 255         return 0;
 256 }
 257
 258 static int create_plane(struct drm_device *dev, struct omap_overlay *ovl,
 259                 unsigned int possible_crtcs)
 260 {
 261         struct omap_drm_private *priv = dev->dev_private;
 262         struct drm_plane *plane =
 263                         omap_plane_init(dev, ovl, possible_crtcs, false);
 264
 265         if (!plane) {
 266                 dev_err(dev->dev, "could not create plane: %s\n",
 267                                 ovl->name);
 268                 return -ENOMEM;
 269         }
 270
 271         BUG_ON(priv->num_planes >= ARRAY_SIZE(priv->planes));
 272
 273         priv->planes[priv->num_planes++] = plane;
 274
 275         return 0;
 276 }
 277
 278 static int match_dev_name(struct omap_dss_device *dssdev, void *data)
 279 {
 280         return !strcmp(dssdev->name, data);
 281 }
 282
 283 static unsigned int detect_connectors(struct drm_device *dev)
 284 {
 285         struct omap_drm_private *priv = dev->dev_private;
 286         unsigned int connected_connectors = 0;
 287         int i;
 288
 289         for (i = 0; i < priv->num_connectors; i++) {
 290                 struct drm_connector *connector = priv->connectors[i];
 291                 if (omap_connector_detect(connector, true) ==
 292                                 connector_status_connected) {
 293                         connected_connectors |= (1 << i);
 294                 }
 295         }
 296
 297         return connected_connectors;
 298 }
 299
 300 static int omap_modeset_init(struct drm_device *dev)
 301 {
 302         const struct omap_drm_platform_data *pdata = dev->dev->platform_data;
 303         struct omap_kms_platform_data *kms_pdata = NULL;
 304         struct omap_drm_private *priv = dev->dev_private;
 305         struct omap_dss_device *dssdev = NULL;
 306         int i, j;
 307         unsigned int connected_connectors = 0;
 308
 309         drm_mode_config_init(dev);
 310
 311         if (pdata && pdata->kms_pdata) {
 312                 kms_pdata = pdata->kms_pdata;
 313
 314                 /* if platform data is provided by the board file, use it to
 315                  * control which overlays, managers, and devices we own.
 316                  */
 317                 for (i = 0; i < kms_pdata->mgr_cnt; i++) {
 318                         struct omap_overlay_manager *mgr =
 319                                 omap_dss_get_overlay_manager(
 320                                                 kms_pdata->mgr_ids[i]);
 321                         create_encoder(dev, mgr);
 322                 }
 323
 324                 for (i = 0; i < kms_pdata->dev_cnt; i++) {
 325                         struct omap_dss_device *dssdev =
 326                                 omap_dss_find_device(
 327                                         (void *)kms_pdata->dev_names[i],
 328                                         match_dev_name);
 329                         if (!dssdev) {
 330                                 dev_warn(dev->dev, "no such dssdev: %s\n",
 331                                                 kms_pdata->dev_names[i]);
 332                                 continue;
 333                         }
 334                         create_connector(dev, dssdev);
 335                 }
 336
 337                 connected_connectors = detect_connectors(dev);
 338
 339                 j = 0;
 340                 for (i = 0; i < kms_pdata->ovl_cnt; i++) {
 341                         struct omap_overlay *ovl =
 342                                 omap_dss_get_overlay(kms_pdata->ovl_ids[i]);
 343                         create_crtc(dev, ovl, &j, connected_connectors);
 344                 }
 345
 346                 for (i = 0; i < kms_pdata->pln_cnt; i++) {
 347                         struct omap_overlay *ovl =
 348                                 omap_dss_get_overlay(kms_pdata->pln_ids[i]);
 349                         create_plane(dev, ovl, (1 << priv->num_crtcs) - 1);
 350                 }
 351         } else {
 352                 /* otherwise just grab up to CONFIG_DRM_OMAP_NUM_CRTCS and try
 353                  * to make educated guesses about everything else
 354                  */
 355                 int max_overlays = min(omap_dss_get_num_overlays(), num_crtc);
 356
 357                 for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
 358                         create_encoder(dev, omap_dss_get_overlay_manager(i));
 359                 }
 360
 361                 for_each_dss_dev(dssdev) {
 362                         create_connector(dev, dssdev);
 363                 }
 364
 365                 connected_connectors = detect_connectors(dev);
 366
 367                 j = 0;
 368                 for (i = 0; i < max_overlays; i++) {
 369                         create_crtc(dev, omap_dss_get_overlay(i),
 370                                         &j, connected_connectors);
 371                 }
 372
 373                 /* use any remaining overlays as drm planes */
 374                 for (; i < omap_dss_get_num_overlays(); i++) {
 375                         struct omap_overlay *ovl = omap_dss_get_overlay(i);
 376                         create_plane(dev, ovl, (1 << priv->num_crtcs) - 1);
 377                 }
 378         }
 379
 380         /* for now keep the mapping of CRTCs and encoders static.. */
 381         for (i = 0; i < priv->num_encoders; i++) {
 382                 struct drm_encoder *encoder = priv->encoders[i];
 383                 struct omap_overlay_manager *mgr =
 384                                 omap_encoder_get_manager(encoder);
 385
 386                 encoder->possible_crtcs = (1 << priv->num_crtcs) - 1;
 387
 388                 DBG("%s: possible_crtcs=%08x", mgr->name,
 389                                         encoder->possible_crtcs);
 390         }
 391
 392         dump_video_chains();
 393
 394         dev->mode_config.min_width = 32;
 395         dev->mode_config.min_height = 32;
 396
 397         /* note: eventually will need some cpu_is_omapXYZ() type stuff here
 398          * to fill in these limits properly on different OMAP generations..
 399          */
 400         dev->mode_config.max_width = 2048;
 401         dev->mode_config.max_height = 2048;
 402
 403         dev->mode_config.funcs = &omap_mode_config_funcs;
 404
 405         return 0;
 406 }
 407
 408 static void omap_modeset_free(struct drm_device *dev)
 409 {
 410         drm_mode_config_cleanup(dev);
 411 }
 412
 413 /*
 414  * drm ioctl funcs
 415  */
 416
 417
 418 static int ioctl_get_param(struct drm_device *dev, void *data,
 419                 struct drm_file *file_priv)
 420 {
 421         struct drm_omap_param *args = data;
 422
 423         DBG("%p: param=%llu", dev, args->param);
 424
 425         switch (args->param) {
 426         case OMAP_PARAM_CHIPSET_ID:
 427                 args->value = GET_OMAP_TYPE;
 428                 break;
 429         default:
 430                 DBG("unknown parameter %lld", args->param);
 431                 return -EINVAL;
 432         }
 433
 434         return 0;
 435 }
 436
 437 static int ioctl_set_param(struct drm_device *dev, void *data,
 438                 struct drm_file *file_priv)
 439 {
 440         struct drm_omap_param *args = data;
 441
 442         switch (args->param) {
 443         default:
 444                 DBG("unknown parameter %lld", args->param);
 445                 return -EINVAL;
 446         }
 447
 448         return 0;
 449 }
 450
 451 static int ioctl_gem_new(struct drm_device *dev, void *data,
 452                 struct drm_file *file_priv)
 453 {
 454         struct drm_omap_gem_new *args = data;
 455         DBG("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
 456                         args->size.bytes, args->flags);
 457         return omap_gem_new_handle(dev, file_priv, args->size,
 458                         args->flags, &args->handle);
 459 }
 460
 461 static int ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
 462                 struct drm_file *file_priv)
 463 {
 464         struct drm_omap_gem_cpu_prep *args = data;
 465         struct drm_gem_object *obj;
 466         int ret;
 467
 468         VERB("%p:%p: handle=%d, op=%x", dev, file_priv, args->handle, args->op);
 469
 470         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 471         if (!obj) {
 472                 return -ENOENT;
 473         }
 474
 475         ret = omap_gem_op_sync(obj, args->op);
 476
 477         if (!ret) {
 478                 ret = omap_gem_op_start(obj, args->op);
 479         }
 480
 481         drm_gem_object_unreference_unlocked(obj);
 482
 483         return ret;
 484 }
 485
 486 static int ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
 487                 struct drm_file *file_priv)
 488 {
 489         struct drm_omap_gem_cpu_fini *args = data;
 490         struct drm_gem_object *obj;
 491         int ret;
 492
 493         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 494
 495         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 496         if (!obj) {
 497                 return -ENOENT;
 498         }
 499
 500         /* XXX flushy, flushy */
 501         ret = 0;
 502
 503         if (!ret) {
 504                 ret = omap_gem_op_finish(obj, args->op);
 505         }
 506
 507         drm_gem_object_unreference_unlocked(obj);
 508
 509         return ret;
 510 }
 511
 512 static int ioctl_gem_info(struct drm_device *dev, void *data,
 513                 struct drm_file *file_priv)
 514 {
 515         struct drm_omap_gem_info *args = data;
 516         struct drm_gem_object *obj;
 517         int ret = 0;
 518
 519         DBG("%p:%p: handle=%d", dev, file_priv, args->handle);
 520
 521         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 522         if (!obj) {
 523                 return -ENOENT;
 524         }
 525
 526         args->size = omap_gem_mmap_size(obj);
 527         args->offset = omap_gem_mmap_offset(obj);
 528
 529         drm_gem_object_unreference_unlocked(obj);
 530
 531         return ret;
 532 }
 533
 534 struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
 535         DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param, DRM_UNLOCKED|DRM_AUTH),
 536         DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param, DRM_UNLOCKED|DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 537         DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_UNLOCKED|DRM_AUTH),
 538         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, ioctl_gem_cpu_prep, DRM_UNLOCKED|DRM_AUTH),
 539         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, ioctl_gem_cpu_fini, DRM_UNLOCKED|DRM_AUTH),
 540         DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_UNLOCKED|DRM_AUTH),
 541 };
 542
 543 /*
 544  * drm driver funcs
 545  */
 546
 547 /**
 548  * load - setup chip and create an initial config
 549  * @dev: DRM device
 550  * @flags: startup flags
 551  *
 552  * The driver load routine has to do several things:
 553  *   - initialize the memory manager
 554  *   - allocate initial config memory
 555  *   - setup the DRM framebuffer with the allocated memory
 556  */
 557 static int dev_load(struct drm_device *dev, unsigned long flags)
 558 {
 559         struct omap_drm_private *priv;
 560         int ret;
 561
 562         DBG("load: dev=%p", dev);
 563
 564         drm_device = dev;
 565
 566         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 567         if (!priv) {
 568                 dev_err(dev->dev, "could not allocate priv\n");
 569                 return -ENOMEM;
 570         }
 571
 572         dev->dev_private = priv;
 573
 574         priv->wq = alloc_workqueue("omapdrm",
 575                         WQ_UNBOUND | WQ_NON_REENTRANT, 1);
 576
 577         INIT_LIST_HEAD(&priv->obj_list);
 578
 579         omap_gem_init(dev);
 580
 581         ret = omap_modeset_init(dev);
 582         if (ret) {
 583                 dev_err(dev->dev, "omap_modeset_init failed: ret=%d\n", ret);
 584                 dev->dev_private = NULL;
 585                 kfree(priv);
 586                 return ret;
 587         }
 588
 589         priv->fbdev = omap_fbdev_init(dev);
 590         if (!priv->fbdev) {
 591                 dev_warn(dev->dev, "omap_fbdev_init failed\n");
 592                 /* well, limp along without an fbdev.. maybe X11 will work? */
 593         }
 594
 595         drm_kms_helper_poll_init(dev);
 596
 597         ret = drm_vblank_init(dev, priv->num_crtcs);
 598         if (ret) {
 599                 dev_warn(dev->dev, "could not init vblank\n");
 600         }
 601
 602         return 0;
 603 }
 604
 605 static int dev_unload(struct drm_device *dev)
 606 {
 607         struct omap_drm_private *priv = dev->dev_private;
 608
 609         DBG("unload: dev=%p", dev);
 610
 611         drm_vblank_cleanup(dev);
 612         drm_kms_helper_poll_fini(dev);
 613
 614         omap_fbdev_free(dev);
 615         omap_modeset_free(dev);
 616         omap_gem_deinit(dev);
 617
 618         flush_workqueue(priv->wq);
 619         destroy_workqueue(priv->wq);
 620
 621         kfree(dev->dev_private);
 622         dev->dev_private = NULL;
 623
 624         return 0;
 625 }
 626
 627 static int dev_open(struct drm_device *dev, struct drm_file *file)
 628 {
 629         file->driver_priv = NULL;
 630
 631         DBG("open: dev=%p, file=%p", dev, file);
 632
 633         return 0;
 634 }
 635
 636 static int dev_firstopen(struct drm_device *dev)
 637 {
 638         DBG("firstopen: dev=%p", dev);
 639         return 0;
 640 }
 641
 642 /**
 643  * lastclose - clean up after all DRM clients have exited
 644  * @dev: DRM device
 645  *
 646  * Take care of cleaning up after all DRM clients have exited.  In the
 647  * mode setting case, we want to restore the kernel's initial mode (just
 648  * in case the last client left us in a bad state).
 649  */
 650 static void dev_lastclose(struct drm_device *dev)
 651 {
 652         /* we don't support vga-switcheroo.. so just make sure the fbdev
 653          * mode is active
 654          */
 655         struct omap_drm_private *priv = dev->dev_private;
 656         int ret;
 657
 658         DBG("lastclose: dev=%p", dev);
 659
 660         ret = drm_fb_helper_restore_fbdev_mode(priv->fbdev);
 661         if (ret)
 662                 DBG("failed to restore crtc mode");
 663 }
 664
 665 static void dev_preclose(struct drm_device *dev, struct drm_file *file)
 666 {
 667         DBG("preclose: dev=%p", dev);
 668 }
 669
 670 static void dev_postclose(struct drm_device *dev, struct drm_file *file)
 671 {
 672         DBG("postclose: dev=%p, file=%p", dev, file);
 673 }
 674
 675 /**
 676  * enable_vblank - enable vblank interrupt events
 677  * @dev: DRM device
 678  * @crtc: which irq to enable
 679  *
 680  * Enable vblank interrupts for @crtc.  If the device doesn't have
 681  * a hardware vblank counter, this routine should be a no-op, since
 682  * interrupts will have to stay on to keep the count accurate.
 683  *
 684  * RETURNS
 685  * Zero on success, appropriate errno if the given @crtc's vblank
 686  * interrupt cannot be enabled.
 687  */
 688 static int dev_enable_vblank(struct drm_device *dev, int crtc)
 689 {
 690         DBG("enable_vblank: dev=%p, crtc=%d", dev, crtc);
 691         return 0;
 692 }
 693
 694 /**
 695  * disable_vblank - disable vblank interrupt events
 696  * @dev: DRM device
 697  * @crtc: which irq to enable
 698  *
 699  * Disable vblank interrupts for @crtc.  If the device doesn't have
 700  * a hardware vblank counter, this routine should be a no-op, since
 701  * interrupts will have to stay on to keep the count accurate.
 702  */
 703 static void dev_disable_vblank(struct drm_device *dev, int crtc)
 704 {
 705         DBG("disable_vblank: dev=%p, crtc=%d", dev, crtc);
 706 }
 707
 708 static irqreturn_t dev_irq_handler(DRM_IRQ_ARGS)
 709 {
 710         return IRQ_HANDLED;
 711 }
 712
 713 static void dev_irq_preinstall(struct drm_device *dev)
 714 {
 715         DBG("irq_preinstall: dev=%p", dev);
 716 }
 717
 718 static int dev_irq_postinstall(struct drm_device *dev)
 719 {
 720         DBG("irq_postinstall: dev=%p", dev);
 721         return 0;
 722 }
 723
 724 static void dev_irq_uninstall(struct drm_device *dev)
 725 {
 726         DBG("irq_uninstall: dev=%p", dev);
 727 }
 728
 729 static struct vm_operations_struct omap_gem_vm_ops = {
 730         .fault = omap_gem_fault,
 731         .open = drm_gem_vm_open,
 732         .close = drm_gem_vm_close,
 733 };
 734
 735 static const struct file_operations omapdriver_fops = {
 736                 .owner = THIS_MODULE,
 737                 .open = drm_open,
 738                 .unlocked_ioctl = drm_ioctl,
 739                 .release = drm_release,
 740                 .mmap = omap_gem_mmap,
 741                 .poll = drm_poll,
 742                 .fasync = drm_fasync,
 743                 .read = drm_read,
 744                 .llseek = noop_llseek,
 745 };
 746
 747 static struct drm_driver omap_drm_driver = {
 748                 .driver_features =
 749                                 DRIVER_HAVE_IRQ | DRIVER_MODESET | DRIVER_GEM,
 750                 .load = dev_load,
 751                 .unload = dev_unload,
 752                 .open = dev_open,
 753                 .firstopen = dev_firstopen,
 754                 .lastclose = dev_lastclose,
 755                 .preclose = dev_preclose,
 756                 .postclose = dev_postclose,
 757                 .get_vblank_counter = drm_vblank_count,
 758                 .enable_vblank = dev_enable_vblank,
 759                 .disable_vblank = dev_disable_vblank,
 760                 .irq_preinstall = dev_irq_preinstall,
 761                 .irq_postinstall = dev_irq_postinstall,
 762                 .irq_uninstall = dev_irq_uninstall,
 763                 .irq_handler = dev_irq_handler,
 764                 .reclaim_buffers = drm_core_reclaim_buffers,
 765 #ifdef CONFIG_DEBUG_FS
 766                 .debugfs_init = omap_debugfs_init,
 767                 .debugfs_cleanup = omap_debugfs_cleanup,
 768 #endif
 769                 .gem_init_object = omap_gem_init_object,
 770                 .gem_free_object = omap_gem_free_object,
 771                 .gem_vm_ops = &omap_gem_vm_ops,
 772                 .dumb_create = omap_gem_dumb_create,
 773                 .dumb_map_offset = omap_gem_dumb_map_offset,
 774                 .dumb_destroy = omap_gem_dumb_destroy,
 775                 .ioctls = ioctls,
 776                 .num_ioctls = DRM_OMAP_NUM_IOCTLS,
 777                 .fops = &omapdriver_fops,
 778                 .name = DRIVER_NAME,
 779                 .desc = DRIVER_DESC,
 780                 .date = DRIVER_DATE,
 781                 .major = DRIVER_MAJOR,
 782                 .minor = DRIVER_MINOR,
 783                 .patchlevel = DRIVER_PATCHLEVEL,
 784 };
 785
 786 static int pdev_suspend(struct platform_device *pDevice, pm_message_t state)
 787 {
 788         DBG("");
 789         return 0;
 790 }
 791
 792 static int pdev_resume(struct platform_device *device)
 793 {
 794         DBG("");
 795         return 0;
 796 }
 797
 798 static void pdev_shutdown(struct platform_device *device)
 799 {
 800         DBG("");
 801 }
 802
 803 static int pdev_probe(struct platform_device *device)
 804 {
 805         DBG("%s", device->name);
 806         if (platform_driver_register(&omap_dmm_driver))
 807                 dev_err(&device->dev, "DMM registration failed\n");
 808
 809         return drm_platform_init(&omap_drm_driver, device);
 810 }
 811
 812 static int pdev_remove(struct platform_device *device)
 813 {
 814         DBG("");
 815         drm_platform_exit(&omap_drm_driver, device);
 816
 817         platform_driver_unregister(&omap_dmm_driver);
 818         return 0;
 819 }
 820
 821 struct platform_driver pdev = {
 822                 .driver = {
 823                         .name = DRIVER_NAME,
 824                         .owner = THIS_MODULE,
 825                 },
 826                 .probe = pdev_probe,
 827                 .remove = pdev_remove,
 828                 .suspend = pdev_suspend,
 829                 .resume = pdev_resume,
 830                 .shutdown = pdev_shutdown,
 831 };
 832
 833 static int __init omap_drm_init(void)
 834 {
 835         DBG("init");
 836         return platform_driver_register(&pdev);
 837 }
 838
 839 static void __exit omap_drm_fini(void)
 840 {
 841         DBG("fini");
 842         platform_driver_unregister(&pdev);
 843 }
 844
 845 /* need late_initcall() so we load after dss_driver's are loaded */
 846 late_initcall(omap_drm_init);
 847 module_exit(omap_drm_fini);
 848
 849 MODULE_AUTHOR("Rob Clark <rob@ti.com>");
 850 MODULE_DESCRIPTION("OMAP DRM Display Driver");
 851 MODULE_ALIAS("platform:" DRIVER_NAME);
 852 MODULE_LICENSE("GPL v2");