drivers/gpu/drm/omapdrm/omap_drv.c

   1 /*
   2  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
   3  * Author: Rob Clark <rob@ti.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <linux/of.h>
  19 #include <linux/sort.h>
  20 #include <linux/sys_soc.h>
  21
  22 #include <drm/drm_atomic.h>
  23 #include <drm/drm_atomic_helper.h>
  24 #include <drm/drm_fb_helper.h>
  25 #include <drm/drm_probe_helper.h>
  26
  27 #include "omap_dmm_tiler.h"
  28 #include "omap_drv.h"
  29
  30 #define DRIVER_NAME             MODULE_NAME
  31 #define DRIVER_DESC             "OMAP DRM"
  32 #define DRIVER_DATE             "20110917"
  33 #define DRIVER_MAJOR            1
  34 #define DRIVER_MINOR            0
  35 #define DRIVER_PATCHLEVEL       0
  36
  37 /*
  38  * mode config funcs
  39  */
  40
  41 /* Notes about mapping DSS and DRM entities:
  42  *    CRTC:        overlay
  43  *    encoder:     manager.. with some extension to allow one primary CRTC
  44  *                 and zero or more video CRTC's to be mapped to one encoder?
  45  *    connector:   dssdev.. manager can be attached/detached from different
  46  *                 devices
  47  */
  48
  49 static void omap_atomic_wait_for_completion(struct drm_device *dev,
  50                                             struct drm_atomic_state *old_state)
  51 {
  52         struct drm_crtc_state *new_crtc_state;
  53         struct drm_crtc *crtc;
  54         unsigned int i;
  55         int ret;
  56
  57         for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
  58                 if (!new_crtc_state->active)
  59                         continue;
  60
  61                 ret = omap_crtc_wait_pending(crtc);
  62
  63                 if (!ret)
  64                         dev_warn(dev->dev,
  65                                  "atomic complete timeout (pipe %u)!\n", i);
  66         }
  67 }
  68
  69 static void omap_atomic_commit_tail(struct drm_atomic_state *old_state)
  70 {
  71         struct drm_device *dev = old_state->dev;
  72         struct omap_drm_private *priv = dev->dev_private;
  73
  74         priv->dispc_ops->runtime_get(priv->dispc);
  75
  76         /* Apply the atomic update. */
  77         drm_atomic_helper_commit_modeset_disables(dev, old_state);
  78
  79         if (priv->omaprev != 0x3430) {
  80                 /* With the current dss dispc implementation we have to enable
  81                  * the new modeset before we can commit planes. The dispc ovl
  82                  * configuration relies on the video mode configuration been
  83                  * written into the HW when the ovl configuration is
  84                  * calculated.
  85                  *
  86                  * This approach is not ideal because after a mode change the
  87                  * plane update is executed only after the first vblank
  88                  * interrupt. The dispc implementation should be fixed so that
  89                  * it is able use uncommitted drm state information.
  90                  */
  91                 drm_atomic_helper_commit_modeset_enables(dev, old_state);
  92                 omap_atomic_wait_for_completion(dev, old_state);
  93
  94                 drm_atomic_helper_commit_planes(dev, old_state, 0);
  95
  96                 drm_atomic_helper_commit_hw_done(old_state);
  97         } else {
  98                 /*
  99                  * OMAP3 DSS seems to have issues with the work-around above,
 100                  * resulting in endless sync losts if a crtc is enabled without
 101                  * a plane. For now, skip the WA for OMAP3.
 102                  */
 103                 drm_atomic_helper_commit_planes(dev, old_state, 0);
 104
 105                 drm_atomic_helper_commit_modeset_enables(dev, old_state);
 106
 107                 drm_atomic_helper_commit_hw_done(old_state);
 108         }
 109
 110         /*
 111          * Wait for completion of the page flips to ensure that old buffers
 112          * can't be touched by the hardware anymore before cleaning up planes.
 113          */
 114         omap_atomic_wait_for_completion(dev, old_state);
 115
 116         drm_atomic_helper_cleanup_planes(dev, old_state);
 117
 118         priv->dispc_ops->runtime_put(priv->dispc);
 119 }
 120
 121 static const struct drm_mode_config_helper_funcs omap_mode_config_helper_funcs = {
 122         .atomic_commit_tail = omap_atomic_commit_tail,
 123 };
 124
 125 static const struct drm_mode_config_funcs omap_mode_config_funcs = {
 126         .fb_create = omap_framebuffer_create,
 127         .output_poll_changed = drm_fb_helper_output_poll_changed,
 128         .atomic_check = drm_atomic_helper_check,
 129         .atomic_commit = drm_atomic_helper_commit,
 130 };
 131
 132 static void omap_disconnect_pipelines(struct drm_device *ddev)
 133 {
 134         struct omap_drm_private *priv = ddev->dev_private;
 135         unsigned int i;
 136
 137         for (i = 0; i < priv->num_pipes; i++) {
 138                 struct omap_drm_pipeline *pipe = &priv->pipes[i];
 139
 140                 omapdss_device_disconnect(NULL, pipe->output);
 141
 142                 omapdss_device_put(pipe->output);
 143                 omapdss_device_put(pipe->display);
 144                 pipe->output = NULL;
 145                 pipe->display = NULL;
 146         }
 147
 148         memset(&priv->channels, 0, sizeof(priv->channels));
 149
 150         priv->num_pipes = 0;
 151 }
 152
 153 static int omap_connect_pipelines(struct drm_device *ddev)
 154 {
 155         struct omap_drm_private *priv = ddev->dev_private;
 156         struct omap_dss_device *output = NULL;
 157         int r;
 158
 159         for_each_dss_output(output) {
 160                 r = omapdss_device_connect(priv->dss, NULL, output);
 161                 if (r == -EPROBE_DEFER) {
 162                         omapdss_device_put(output);
 163                         return r;
 164                 } else if (r) {
 165                         dev_warn(output->dev, "could not connect output %s\n",
 166                                  output->name);
 167                 } else {
 168                         struct omap_drm_pipeline *pipe;
 169
 170                         pipe = &priv->pipes[priv->num_pipes++];
 171                         pipe->output = omapdss_device_get(output);
 172                         pipe->display = omapdss_display_get(output);
 173
 174                         if (priv->num_pipes == ARRAY_SIZE(priv->pipes)) {
 175                                 /* To balance the 'for_each_dss_output' loop */
 176                                 omapdss_device_put(output);
 177                                 break;
 178                         }
 179                 }
 180         }
 181
 182         return 0;
 183 }
 184
 185 static int omap_compare_pipelines(const void *a, const void *b)
 186 {
 187         const struct omap_drm_pipeline *pipe1 = a;
 188         const struct omap_drm_pipeline *pipe2 = b;
 189
 190         if (pipe1->alias_id > pipe2->alias_id)
 191                 return 1;
 192         else if (pipe1->alias_id < pipe2->alias_id)
 193                 return -1;
 194         return 0;
 195 }
 196
 197 static int omap_modeset_init_properties(struct drm_device *dev)
 198 {
 199         struct omap_drm_private *priv = dev->dev_private;
 200         unsigned int num_planes = priv->dispc_ops->get_num_ovls(priv->dispc);
 201
 202         priv->zorder_prop = drm_property_create_range(dev, 0, "zorder", 0,
 203                                                       num_planes - 1);
 204         if (!priv->zorder_prop)
 205                 return -ENOMEM;
 206
 207         return 0;
 208 }
 209
 210 static int omap_modeset_init(struct drm_device *dev)
 211 {
 212         struct omap_drm_private *priv = dev->dev_private;
 213         int num_ovls = priv->dispc_ops->get_num_ovls(priv->dispc);
 214         int num_mgrs = priv->dispc_ops->get_num_mgrs(priv->dispc);
 215         unsigned int i;
 216         int ret;
 217         u32 plane_crtc_mask;
 218
 219         if (!omapdss_stack_is_ready())
 220                 return -EPROBE_DEFER;
 221
 222         drm_mode_config_init(dev);
 223
 224         ret = omap_modeset_init_properties(dev);
 225         if (ret < 0)
 226                 return ret;
 227
 228         /*
 229          * This function creates exactly one connector, encoder, crtc,
 230          * and primary plane per each connected dss-device. Each
 231          * connector->encoder->crtc chain is expected to be separate
 232          * and each crtc is connect to a single dss-channel. If the
 233          * configuration does not match the expectations or exceeds
 234          * the available resources, the configuration is rejected.
 235          */
 236         ret = omap_connect_pipelines(dev);
 237         if (ret < 0)
 238                 return ret;
 239
 240         if (priv->num_pipes > num_mgrs || priv->num_pipes > num_ovls) {
 241                 dev_err(dev->dev, "%s(): Too many connected displays\n",
 242                         __func__);
 243                 return -EINVAL;
 244         }
 245
 246         /* Create all planes first. They can all be put to any CRTC. */
 247         plane_crtc_mask = (1 << priv->num_pipes) - 1;
 248
 249         for (i = 0; i < num_ovls; i++) {
 250                 enum drm_plane_type type = i < priv->num_pipes
 251                                          ? DRM_PLANE_TYPE_PRIMARY
 252                                          : DRM_PLANE_TYPE_OVERLAY;
 253                 struct drm_plane *plane;
 254
 255                 if (WARN_ON(priv->num_planes >= ARRAY_SIZE(priv->planes)))
 256                         return -EINVAL;
 257
 258                 plane = omap_plane_init(dev, i, type, plane_crtc_mask);
 259                 if (IS_ERR(plane))
 260                         return PTR_ERR(plane);
 261
 262                 priv->planes[priv->num_planes++] = plane;
 263         }
 264
 265         /* Create the encoders and get the pipelines aliases. */
 266         for (i = 0; i < priv->num_pipes; i++) {
 267                 struct omap_drm_pipeline *pipe = &priv->pipes[i];
 268                 int id;
 269
 270                 pipe->encoder = omap_encoder_init(dev, pipe->output);
 271                 if (!pipe->encoder)
 272                         return -ENOMEM;
 273
 274                 id = of_alias_get_id(pipe->display->dev->of_node, "display");
 275                 pipe->alias_id = id >= 0 ? id : i;
 276         }
 277
 278         /* Sort the pipelines by DT aliases. */
 279         sort(priv->pipes, priv->num_pipes, sizeof(priv->pipes[0]),
 280              omap_compare_pipelines, NULL);
 281
 282         /*
 283          * Populate the pipeline lookup table by DISPC channel. Only one display
 284          * is allowed per channel.
 285          */
 286         for (i = 0; i < priv->num_pipes; ++i) {
 287                 struct omap_drm_pipeline *pipe = &priv->pipes[i];
 288                 enum omap_channel channel = pipe->output->dispc_channel;
 289
 290                 if (WARN_ON(priv->channels[channel] != NULL))
 291                         return -EINVAL;
 292
 293                 priv->channels[channel] = pipe;
 294         }
 295
 296         /* Create the connectors and CRTCs. */
 297         for (i = 0; i < priv->num_pipes; i++) {
 298                 struct omap_drm_pipeline *pipe = &priv->pipes[i];
 299                 struct drm_encoder *encoder = pipe->encoder;
 300                 struct drm_connector *connector;
 301                 struct drm_crtc *crtc;
 302
 303                 connector = omap_connector_init(dev, pipe->output,
 304                                                 pipe->display, encoder);
 305                 if (!connector)
 306                         return -ENOMEM;
 307
 308                 drm_connector_attach_encoder(connector, encoder);
 309                 pipe->connector = connector;
 310
 311                 crtc = omap_crtc_init(dev, pipe, priv->planes[i]);
 312                 if (IS_ERR(crtc))
 313                         return PTR_ERR(crtc);
 314
 315                 encoder->possible_crtcs = 1 << i;
 316                 pipe->crtc = crtc;
 317         }
 318
 319         DBG("registered %u planes, %u crtcs/encoders/connectors\n",
 320             priv->num_planes, priv->num_pipes);
 321
 322         dev->mode_config.min_width = 8;
 323         dev->mode_config.min_height = 2;
 324
 325         /*
 326          * Note: these values are used for multiple independent things:
 327          * connector mode filtering, buffer sizes, crtc sizes...
 328          * Use big enough values here to cover all use cases, and do more
 329          * specific checking in the respective code paths.
 330          */
 331         dev->mode_config.max_width = 8192;
 332         dev->mode_config.max_height = 8192;
 333
 334         /* We want the zpos to be normalized */
 335         dev->mode_config.normalize_zpos = true;
 336
 337         dev->mode_config.funcs = &omap_mode_config_funcs;
 338         dev->mode_config.helper_private = &omap_mode_config_helper_funcs;
 339
 340         drm_mode_config_reset(dev);
 341
 342         omap_drm_irq_install(dev);
 343
 344         return 0;
 345 }
 346
 347 /*
 348  * Enable the HPD in external components if supported
 349  */
 350 static void omap_modeset_enable_external_hpd(struct drm_device *ddev)
 351 {
 352         struct omap_drm_private *priv = ddev->dev_private;
 353         int i;
 354
 355         for (i = 0; i < priv->num_pipes; i++)
 356                 omap_connector_enable_hpd(priv->pipes[i].connector);
 357 }
 358
 359 /*
 360  * Disable the HPD in external components if supported
 361  */
 362 static void omap_modeset_disable_external_hpd(struct drm_device *ddev)
 363 {
 364         struct omap_drm_private *priv = ddev->dev_private;
 365         int i;
 366
 367         for (i = 0; i < priv->num_pipes; i++)
 368                 omap_connector_disable_hpd(priv->pipes[i].connector);
 369 }
 370
 371 /*
 372  * drm ioctl funcs
 373  */
 374
 375
 376 static int ioctl_get_param(struct drm_device *dev, void *data,
 377                 struct drm_file *file_priv)
 378 {
 379         struct omap_drm_private *priv = dev->dev_private;
 380         struct drm_omap_param *args = data;
 381
 382         DBG("%p: param=%llu", dev, args->param);
 383
 384         switch (args->param) {
 385         case OMAP_PARAM_CHIPSET_ID:
 386                 args->value = priv->omaprev;
 387                 break;
 388         default:
 389                 DBG("unknown parameter %lld", args->param);
 390                 return -EINVAL;
 391         }
 392
 393         return 0;
 394 }
 395
 396 static int ioctl_set_param(struct drm_device *dev, void *data,
 397                 struct drm_file *file_priv)
 398 {
 399         struct drm_omap_param *args = data;
 400
 401         switch (args->param) {
 402         default:
 403                 DBG("unknown parameter %lld", args->param);
 404                 return -EINVAL;
 405         }
 406
 407         return 0;
 408 }
 409
 410 #define OMAP_BO_USER_MASK       0x00ffffff      /* flags settable by userspace */
 411
 412 static int ioctl_gem_new(struct drm_device *dev, void *data,
 413                 struct drm_file *file_priv)
 414 {
 415         struct drm_omap_gem_new *args = data;
 416         u32 flags = args->flags & OMAP_BO_USER_MASK;
 417
 418         VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
 419              args->size.bytes, flags);
 420
 421         return omap_gem_new_handle(dev, file_priv, args->size, flags,
 422                                    &args->handle);
 423 }
 424
 425 static int ioctl_gem_info(struct drm_device *dev, void *data,
 426                 struct drm_file *file_priv)
 427 {
 428         struct drm_omap_gem_info *args = data;
 429         struct drm_gem_object *obj;
 430         int ret = 0;
 431
 432         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 433
 434         obj = drm_gem_object_lookup(file_priv, args->handle);
 435         if (!obj)
 436                 return -ENOENT;
 437
 438         args->size = omap_gem_mmap_size(obj);
 439         args->offset = omap_gem_mmap_offset(obj);
 440
 441         drm_gem_object_put_unlocked(obj);
 442
 443         return ret;
 444 }
 445
 446 static const struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
 447         DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param,
 448                           DRM_AUTH | DRM_RENDER_ALLOW),
 449         DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param,
 450                           DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 451         DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new,
 452                           DRM_AUTH | DRM_RENDER_ALLOW),
 453         /* Deprecated, to be removed. */
 454         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, drm_noop,
 455                           DRM_AUTH | DRM_RENDER_ALLOW),
 456         /* Deprecated, to be removed. */
 457         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, drm_noop,
 458                           DRM_AUTH | DRM_RENDER_ALLOW),
 459         DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info,
 460                           DRM_AUTH | DRM_RENDER_ALLOW),
 461 };
 462
 463 /*
 464  * drm driver funcs
 465  */
 466
 467 static int dev_open(struct drm_device *dev, struct drm_file *file)
 468 {
 469         file->driver_priv = NULL;
 470
 471         DBG("open: dev=%p, file=%p", dev, file);
 472
 473         return 0;
 474 }
 475
 476 static const struct vm_operations_struct omap_gem_vm_ops = {
 477         .fault = omap_gem_fault,
 478         .open = drm_gem_vm_open,
 479         .close = drm_gem_vm_close,
 480 };
 481
 482 static const struct file_operations omapdriver_fops = {
 483         .owner = THIS_MODULE,
 484         .open = drm_open,
 485         .unlocked_ioctl = drm_ioctl,
 486         .compat_ioctl = drm_compat_ioctl,
 487         .release = drm_release,
 488         .mmap = omap_gem_mmap,
 489         .poll = drm_poll,
 490         .read = drm_read,
 491         .llseek = noop_llseek,
 492 };
 493
 494 static struct drm_driver omap_drm_driver = {
 495         .driver_features = DRIVER_MODESET | DRIVER_GEM  | DRIVER_PRIME |
 496                 DRIVER_ATOMIC | DRIVER_RENDER,
 497         .open = dev_open,
 498         .lastclose = drm_fb_helper_lastclose,
 499 #ifdef CONFIG_DEBUG_FS
 500         .debugfs_init = omap_debugfs_init,
 501 #endif
 502         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 503         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 504         .gem_prime_export = omap_gem_prime_export,
 505         .gem_prime_import = omap_gem_prime_import,
 506         .gem_free_object_unlocked = omap_gem_free_object,
 507         .gem_vm_ops = &omap_gem_vm_ops,
 508         .dumb_create = omap_gem_dumb_create,
 509         .dumb_map_offset = omap_gem_dumb_map_offset,
 510         .ioctls = ioctls,
 511         .num_ioctls = DRM_OMAP_NUM_IOCTLS,
 512         .fops = &omapdriver_fops,
 513         .name = DRIVER_NAME,
 514         .desc = DRIVER_DESC,
 515         .date = DRIVER_DATE,
 516         .major = DRIVER_MAJOR,
 517         .minor = DRIVER_MINOR,
 518         .patchlevel = DRIVER_PATCHLEVEL,
 519 };
 520
 521 static const struct soc_device_attribute omapdrm_soc_devices[] = {
 522         { .family = "OMAP3", .data = (void *)0x3430 },
 523         { .family = "OMAP4", .data = (void *)0x4430 },
 524         { .family = "OMAP5", .data = (void *)0x5430 },
 525         { .family = "DRA7",  .data = (void *)0x0752 },
 526         { /* sentinel */ }
 527 };
 528
 529 static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
 530 {
 531         const struct soc_device_attribute *soc;
 532         struct drm_device *ddev;
 533         unsigned int i;
 534         int ret;
 535
 536         DBG("%s", dev_name(dev));
 537
 538         /* Allocate and initialize the DRM device. */
 539         ddev = drm_dev_alloc(&omap_drm_driver, dev);
 540         if (IS_ERR(ddev))
 541                 return PTR_ERR(ddev);
 542
 543         priv->ddev = ddev;
 544         ddev->dev_private = priv;
 545
 546         priv->dev = dev;
 547         priv->dss = omapdss_get_dss();
 548         priv->dispc = dispc_get_dispc(priv->dss);
 549         priv->dispc_ops = dispc_get_ops(priv->dss);
 550
 551         omap_crtc_pre_init(priv);
 552
 553         soc = soc_device_match(omapdrm_soc_devices);
 554         priv->omaprev = soc ? (unsigned int)soc->data : 0;
 555         priv->wq = alloc_ordered_workqueue("omapdrm", 0);
 556
 557         mutex_init(&priv->list_lock);
 558         INIT_LIST_HEAD(&priv->obj_list);
 559
 560         /* Get memory bandwidth limits */
 561         if (priv->dispc_ops->get_memory_bandwidth_limit)
 562                 priv->max_bandwidth =
 563                         priv->dispc_ops->get_memory_bandwidth_limit(priv->dispc);
 564
 565         omap_gem_init(ddev);
 566
 567         ret = omap_modeset_init(ddev);
 568         if (ret) {
 569                 dev_err(priv->dev, "omap_modeset_init failed: ret=%d\n", ret);
 570                 goto err_gem_deinit;
 571         }
 572
 573         /* Initialize vblank handling, start with all CRTCs disabled. */
 574         ret = drm_vblank_init(ddev, priv->num_pipes);
 575         if (ret) {
 576                 dev_err(priv->dev, "could not init vblank\n");
 577                 goto err_cleanup_modeset;
 578         }
 579
 580         for (i = 0; i < priv->num_pipes; i++)
 581                 drm_crtc_vblank_off(priv->pipes[i].crtc);
 582
 583         omap_fbdev_init(ddev);
 584
 585         drm_kms_helper_poll_init(ddev);
 586         omap_modeset_enable_external_hpd(ddev);
 587
 588         /*
 589          * Register the DRM device with the core and the connectors with
 590          * sysfs.
 591          */
 592         ret = drm_dev_register(ddev, 0);
 593         if (ret)
 594                 goto err_cleanup_helpers;
 595
 596         return 0;
 597
 598 err_cleanup_helpers:
 599         omap_modeset_disable_external_hpd(ddev);
 600         drm_kms_helper_poll_fini(ddev);
 601
 602         omap_fbdev_fini(ddev);
 603 err_cleanup_modeset:
 604         drm_mode_config_cleanup(ddev);
 605         omap_drm_irq_uninstall(ddev);
 606 err_gem_deinit:
 607         omap_gem_deinit(ddev);
 608         destroy_workqueue(priv->wq);
 609         omap_disconnect_pipelines(ddev);
 610         omap_crtc_pre_uninit(priv);
 611         drm_dev_put(ddev);
 612         return ret;
 613 }
 614
 615 static void omapdrm_cleanup(struct omap_drm_private *priv)
 616 {
 617         struct drm_device *ddev = priv->ddev;
 618
 619         DBG("");
 620
 621         drm_dev_unregister(ddev);
 622
 623         omap_modeset_disable_external_hpd(ddev);
 624         drm_kms_helper_poll_fini(ddev);
 625
 626         omap_fbdev_fini(ddev);
 627
 628         drm_atomic_helper_shutdown(ddev);
 629
 630         drm_mode_config_cleanup(ddev);
 631
 632         omap_drm_irq_uninstall(ddev);
 633         omap_gem_deinit(ddev);
 634
 635         destroy_workqueue(priv->wq);
 636
 637         omap_disconnect_pipelines(ddev);
 638         omap_crtc_pre_uninit(priv);
 639
 640         drm_dev_put(ddev);
 641 }
 642
 643 static int pdev_probe(struct platform_device *pdev)
 644 {
 645         struct omap_drm_private *priv;
 646         int ret;
 647
 648         if (omapdss_is_initialized() == false)
 649                 return -EPROBE_DEFER;
 650
 651         ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
 652         if (ret) {
 653                 dev_err(&pdev->dev, "Failed to set the DMA mask\n");
 654                 return ret;
 655         }
 656
 657         /* Allocate and initialize the driver private structure. */
 658         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 659         if (!priv)
 660                 return -ENOMEM;
 661
 662         platform_set_drvdata(pdev, priv);
 663
 664         ret = omapdrm_init(priv, &pdev->dev);
 665         if (ret < 0)
 666                 kfree(priv);
 667
 668         return ret;
 669 }
 670
 671 static int pdev_remove(struct platform_device *pdev)
 672 {
 673         struct omap_drm_private *priv = platform_get_drvdata(pdev);
 674
 675         omapdrm_cleanup(priv);
 676         kfree(priv);
 677
 678         return 0;
 679 }
 680
 681 #ifdef CONFIG_PM_SLEEP
 682 static int omap_drm_suspend(struct device *dev)
 683 {
 684         struct omap_drm_private *priv = dev_get_drvdata(dev);
 685         struct drm_device *drm_dev = priv->ddev;
 686
 687         return drm_mode_config_helper_suspend(drm_dev);
 688 }
 689
 690 static int omap_drm_resume(struct device *dev)
 691 {
 692         struct omap_drm_private *priv = dev_get_drvdata(dev);
 693         struct drm_device *drm_dev = priv->ddev;
 694
 695         drm_mode_config_helper_resume(drm_dev);
 696
 697         return omap_gem_resume(drm_dev);
 698 }
 699 #endif
 700
 701 static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume);
 702
 703 static struct platform_driver pdev = {
 704         .driver = {
 705                 .name = "omapdrm",
 706                 .pm = &omapdrm_pm_ops,
 707         },
 708         .probe = pdev_probe,
 709         .remove = pdev_remove,
 710 };
 711
 712 static struct platform_driver * const drivers[] = {
 713         &omap_dmm_driver,
 714         &pdev,
 715 };
 716
 717 static int __init omap_drm_init(void)
 718 {
 719         DBG("init");
 720
 721         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 722 }
 723
 724 static void __exit omap_drm_fini(void)
 725 {
 726         DBG("fini");
 727
 728         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 729 }
 730
 731 /* need late_initcall() so we load after dss_driver's are loaded */
 732 late_initcall(omap_drm_init);
 733 module_exit(omap_drm_fini);
 734
 735 MODULE_AUTHOR("Rob Clark <rob@ti.com>");
 736 MODULE_DESCRIPTION("OMAP DRM Display Driver");
 737 MODULE_ALIAS("platform:" DRIVER_NAME);
 738 MODULE_LICENSE("GPL v2");