root/drivers/gpu/drm/omapdrm/omap_drv.c

DEFINITIONS

1. omap_atomic_wait_for_completion
2. omap_atomic_commit_tail
3. omap_disconnect_pipelines
4. omap_connect_pipelines
5. omap_compare_pipelines
6. omap_modeset_init_properties
7. omap_display_id
8. omap_modeset_init
9. omap_modeset_enable_external_hpd
10. omap_modeset_disable_external_hpd
11. ioctl_get_param
12. ioctl_gem_new
13. ioctl_gem_info
14. dev_open
15. omapdrm_init
16. omapdrm_cleanup
17. pdev_probe
18. pdev_remove
19. omap_drm_suspend
20. omap_drm_resume
21. omap_drm_init
22. omap_drm_fini

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
   4  * Author: Rob Clark <rob@ti.com>
   5  */
   6 
   7 #include <linux/dma-mapping.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/sort.h>
  10 #include <linux/sys_soc.h>
  11 
  12 #include <drm/drm_atomic.h>
  13 #include <drm/drm_atomic_helper.h>
  14 #include <drm/drm_drv.h>
  15 #include <drm/drm_fb_helper.h>
  16 #include <drm/drm_file.h>
  17 #include <drm/drm_ioctl.h>
  18 #include <drm/drm_panel.h>
  19 #include <drm/drm_prime.h>
  20 #include <drm/drm_probe_helper.h>
  21 #include <drm/drm_vblank.h>
  22 
  23 #include "omap_dmm_tiler.h"
  24 #include "omap_drv.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 /*
  34  * mode config funcs
  35  */
  36 
  37 /* Notes about mapping DSS and DRM entities:
  38  *    CRTC:        overlay
  39  *    encoder:     manager.. with some extension to allow one primary CRTC
  40  *                 and zero or more video CRTC's to be mapped to one encoder?
  41  *    connector:   dssdev.. manager can be attached/detached from different
  42  *                 devices
  43  */
  44 
  45 static void omap_atomic_wait_for_completion(struct drm_device *dev,
  46                                             struct drm_atomic_state *old_state)
  47 {
  48         struct drm_crtc_state *new_crtc_state;
  49         struct drm_crtc *crtc;
  50         unsigned int i;
  51         int ret;
  52 
  53         for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
  54                 if (!new_crtc_state->active)
  55                         continue;
  56 
  57                 ret = omap_crtc_wait_pending(crtc);
  58 
  59                 if (!ret)
  60                         dev_warn(dev->dev,
  61                                  "atomic complete timeout (pipe %u)!\n", i);
  62         }
  63 }
  64 
  65 static void omap_atomic_commit_tail(struct drm_atomic_state *old_state)
  66 {
  67         struct drm_device *dev = old_state->dev;
  68         struct omap_drm_private *priv = dev->dev_private;
  69 
  70         priv->dispc_ops->runtime_get(priv->dispc);
  71 
  72         /* Apply the atomic update. */
  73         drm_atomic_helper_commit_modeset_disables(dev, old_state);
  74 
  75         if (priv->omaprev != 0x3430) {
  76                 /* With the current dss dispc implementation we have to enable
  77                  * the new modeset before we can commit planes. The dispc ovl
  78                  * configuration relies on the video mode configuration been
  79                  * written into the HW when the ovl configuration is
  80                  * calculated.
  81                  *
  82                  * This approach is not ideal because after a mode change the
  83                  * plane update is executed only after the first vblank
  84                  * interrupt. The dispc implementation should be fixed so that
  85                  * it is able use uncommitted drm state information.
  86                  */
  87                 drm_atomic_helper_commit_modeset_enables(dev, old_state);
  88                 omap_atomic_wait_for_completion(dev, old_state);
  89 
  90                 drm_atomic_helper_commit_planes(dev, old_state, 0);
  91 
  92                 drm_atomic_helper_commit_hw_done(old_state);
  93         } else {
  94                 /*
  95                  * OMAP3 DSS seems to have issues with the work-around above,
  96                  * resulting in endless sync losts if a crtc is enabled without
  97                  * a plane. For now, skip the WA for OMAP3.
  98                  */
  99                 drm_atomic_helper_commit_planes(dev, old_state, 0);
 100 
 101                 drm_atomic_helper_commit_modeset_enables(dev, old_state);
 102 
 103                 drm_atomic_helper_commit_hw_done(old_state);
 104         }
 105 
 106         /*
 107          * Wait for completion of the page flips to ensure that old buffers
 108          * can't be touched by the hardware anymore before cleaning up planes.
 109          */
 110         omap_atomic_wait_for_completion(dev, old_state);
 111 
 112         drm_atomic_helper_cleanup_planes(dev, old_state);
 113 
 114         priv->dispc_ops->runtime_put(priv->dispc);
 115 }
 116 
 117 static const struct drm_mode_config_helper_funcs omap_mode_config_helper_funcs = {
 118         .atomic_commit_tail = omap_atomic_commit_tail,
 119 };
 120 
 121 static const struct drm_mode_config_funcs omap_mode_config_funcs = {
 122         .fb_create = omap_framebuffer_create,
 123         .output_poll_changed = drm_fb_helper_output_poll_changed,
 124         .atomic_check = drm_atomic_helper_check,
 125         .atomic_commit = drm_atomic_helper_commit,
 126 };
 127 
 128 static void omap_disconnect_pipelines(struct drm_device *ddev)
 129 {
 130         struct omap_drm_private *priv = ddev->dev_private;
 131         unsigned int i;
 132 
 133         for (i = 0; i < priv->num_pipes; i++) {
 134                 struct omap_drm_pipeline *pipe = &priv->pipes[i];
 135 
 136                 if (pipe->output->panel)
 137                         drm_panel_detach(pipe->output->panel);
 138 
 139                 omapdss_device_disconnect(NULL, pipe->output);
 140 
 141                 omapdss_device_put(pipe->output);
 142                 pipe->output = NULL;
 143         }
 144 
 145         memset(&priv->channels, 0, sizeof(priv->channels));
 146 
 147         priv->num_pipes = 0;
 148 }
 149 
 150 static int omap_connect_pipelines(struct drm_device *ddev)
 151 {
 152         struct omap_drm_private *priv = ddev->dev_private;
 153         struct omap_dss_device *output = NULL;
 154         int r;
 155 
 156         for_each_dss_output(output) {
 157                 r = omapdss_device_connect(priv->dss, NULL, output);
 158                 if (r == -EPROBE_DEFER) {
 159                         omapdss_device_put(output);
 160                         return r;
 161                 } else if (r) {
 162                         dev_warn(output->dev, "could not connect output %s\n",
 163                                  output->name);
 164                 } else {
 165                         struct omap_drm_pipeline *pipe;
 166 
 167                         pipe = &priv->pipes[priv->num_pipes++];
 168                         pipe->output = omapdss_device_get(output);
 169 
 170                         if (priv->num_pipes == ARRAY_SIZE(priv->pipes)) {
 171                                 /* To balance the 'for_each_dss_output' loop */
 172                                 omapdss_device_put(output);
 173                                 break;
 174                         }
 175                 }
 176         }
 177 
 178         return 0;
 179 }
 180 
 181 static int omap_compare_pipelines(const void *a, const void *b)
 182 {
 183         const struct omap_drm_pipeline *pipe1 = a;
 184         const struct omap_drm_pipeline *pipe2 = b;
 185 
 186         if (pipe1->alias_id > pipe2->alias_id)
 187                 return 1;
 188         else if (pipe1->alias_id < pipe2->alias_id)
 189                 return -1;
 190         return 0;
 191 }
 192 
 193 static int omap_modeset_init_properties(struct drm_device *dev)
 194 {
 195         struct omap_drm_private *priv = dev->dev_private;
 196         unsigned int num_planes = priv->dispc_ops->get_num_ovls(priv->dispc);
 197 
 198         priv->zorder_prop = drm_property_create_range(dev, 0, "zorder", 0,
 199                                                       num_planes - 1);
 200         if (!priv->zorder_prop)
 201                 return -ENOMEM;
 202 
 203         return 0;
 204 }
 205 
 206 static int omap_display_id(struct omap_dss_device *output)
 207 {
 208         struct device_node *node = NULL;
 209 
 210         if (output->next) {
 211                 struct omap_dss_device *display;
 212 
 213                 display = omapdss_display_get(output);
 214                 node = display->dev->of_node;
 215                 omapdss_device_put(display);
 216         } else if (output->bridge) {
 217                 struct drm_bridge *bridge = output->bridge;
 218 
 219                 while (bridge->next)
 220                         bridge = bridge->next;
 221 
 222                 node = bridge->of_node;
 223         } else if (output->panel) {
 224                 node = output->panel->dev->of_node;
 225         }
 226 
 227         return node ? of_alias_get_id(node, "display") : -ENODEV;
 228 }
 229 
 230 static int omap_modeset_init(struct drm_device *dev)
 231 {
 232         struct omap_drm_private *priv = dev->dev_private;
 233         int num_ovls = priv->dispc_ops->get_num_ovls(priv->dispc);
 234         int num_mgrs = priv->dispc_ops->get_num_mgrs(priv->dispc);
 235         unsigned int i;
 236         int ret;
 237         u32 plane_crtc_mask;
 238 
 239         if (!omapdss_stack_is_ready())
 240                 return -EPROBE_DEFER;
 241 
 242         drm_mode_config_init(dev);
 243 
 244         ret = omap_modeset_init_properties(dev);
 245         if (ret < 0)
 246                 return ret;
 247 
 248         /*
 249          * This function creates exactly one connector, encoder, crtc,
 250          * and primary plane per each connected dss-device. Each
 251          * connector->encoder->crtc chain is expected to be separate
 252          * and each crtc is connect to a single dss-channel. If the
 253          * configuration does not match the expectations or exceeds
 254          * the available resources, the configuration is rejected.
 255          */
 256         ret = omap_connect_pipelines(dev);
 257         if (ret < 0)
 258                 return ret;
 259 
 260         if (priv->num_pipes > num_mgrs || priv->num_pipes > num_ovls) {
 261                 dev_err(dev->dev, "%s(): Too many connected displays\n",
 262                         __func__);
 263                 return -EINVAL;
 264         }
 265 
 266         /* Create all planes first. They can all be put to any CRTC. */
 267         plane_crtc_mask = (1 << priv->num_pipes) - 1;
 268 
 269         for (i = 0; i < num_ovls; i++) {
 270                 enum drm_plane_type type = i < priv->num_pipes
 271                                          ? DRM_PLANE_TYPE_PRIMARY
 272                                          : DRM_PLANE_TYPE_OVERLAY;
 273                 struct drm_plane *plane;
 274 
 275                 if (WARN_ON(priv->num_planes >= ARRAY_SIZE(priv->planes)))
 276                         return -EINVAL;
 277 
 278                 plane = omap_plane_init(dev, i, type, plane_crtc_mask);
 279                 if (IS_ERR(plane))
 280                         return PTR_ERR(plane);
 281 
 282                 priv->planes[priv->num_planes++] = plane;
 283         }
 284 
 285         /*
 286          * Create the encoders, attach the bridges and get the pipeline alias
 287          * IDs.
 288          */
 289         for (i = 0; i < priv->num_pipes; i++) {
 290                 struct omap_drm_pipeline *pipe = &priv->pipes[i];
 291                 int id;
 292 
 293                 pipe->encoder = omap_encoder_init(dev, pipe->output);
 294                 if (!pipe->encoder)
 295                         return -ENOMEM;
 296 
 297                 if (pipe->output->bridge) {
 298                         ret = drm_bridge_attach(pipe->encoder,
 299                                                 pipe->output->bridge, NULL);
 300                         if (ret < 0)
 301                                 return ret;
 302                 }
 303 
 304                 id = omap_display_id(pipe->output);
 305                 pipe->alias_id = id >= 0 ? id : i;
 306         }
 307 
 308         /* Sort the pipelines by DT aliases. */
 309         sort(priv->pipes, priv->num_pipes, sizeof(priv->pipes[0]),
 310              omap_compare_pipelines, NULL);
 311 
 312         /*
 313          * Populate the pipeline lookup table by DISPC channel. Only one display
 314          * is allowed per channel.
 315          */
 316         for (i = 0; i < priv->num_pipes; ++i) {
 317                 struct omap_drm_pipeline *pipe = &priv->pipes[i];
 318                 enum omap_channel channel = pipe->output->dispc_channel;
 319 
 320                 if (WARN_ON(priv->channels[channel] != NULL))
 321                         return -EINVAL;
 322 
 323                 priv->channels[channel] = pipe;
 324         }
 325 
 326         /* Create the connectors and CRTCs. */
 327         for (i = 0; i < priv->num_pipes; i++) {
 328                 struct omap_drm_pipeline *pipe = &priv->pipes[i];
 329                 struct drm_encoder *encoder = pipe->encoder;
 330                 struct drm_crtc *crtc;
 331 
 332                 if (!pipe->output->bridge) {
 333                         pipe->connector = omap_connector_init(dev, pipe->output,
 334                                                               encoder);
 335                         if (!pipe->connector)
 336                                 return -ENOMEM;
 337 
 338                         drm_connector_attach_encoder(pipe->connector, encoder);
 339 
 340                         if (pipe->output->panel) {
 341                                 ret = drm_panel_attach(pipe->output->panel,
 342                                                        pipe->connector);
 343                                 if (ret < 0)
 344                                         return ret;
 345                         }
 346                 }
 347 
 348                 crtc = omap_crtc_init(dev, pipe, priv->planes[i]);
 349                 if (IS_ERR(crtc))
 350                         return PTR_ERR(crtc);
 351 
 352                 encoder->possible_crtcs = 1 << i;
 353                 pipe->crtc = crtc;
 354         }
 355 
 356         DBG("registered %u planes, %u crtcs/encoders/connectors\n",
 357             priv->num_planes, priv->num_pipes);
 358 
 359         dev->mode_config.min_width = 8;
 360         dev->mode_config.min_height = 2;
 361 
 362         /*
 363          * Note: these values are used for multiple independent things:
 364          * connector mode filtering, buffer sizes, crtc sizes...
 365          * Use big enough values here to cover all use cases, and do more
 366          * specific checking in the respective code paths.
 367          */
 368         dev->mode_config.max_width = 8192;
 369         dev->mode_config.max_height = 8192;
 370 
 371         /* We want the zpos to be normalized */
 372         dev->mode_config.normalize_zpos = true;
 373 
 374         dev->mode_config.funcs = &omap_mode_config_funcs;
 375         dev->mode_config.helper_private = &omap_mode_config_helper_funcs;
 376 
 377         drm_mode_config_reset(dev);
 378 
 379         omap_drm_irq_install(dev);
 380 
 381         return 0;
 382 }
 383 
 384 /*
 385  * Enable the HPD in external components if supported
 386  */
 387 static void omap_modeset_enable_external_hpd(struct drm_device *ddev)
 388 {
 389         struct omap_drm_private *priv = ddev->dev_private;
 390         unsigned int i;
 391 
 392         for (i = 0; i < priv->num_pipes; i++) {
 393                 if (priv->pipes[i].connector)
 394                         omap_connector_enable_hpd(priv->pipes[i].connector);
 395         }
 396 }
 397 
 398 /*
 399  * Disable the HPD in external components if supported
 400  */
 401 static void omap_modeset_disable_external_hpd(struct drm_device *ddev)
 402 {
 403         struct omap_drm_private *priv = ddev->dev_private;
 404         unsigned int i;
 405 
 406         for (i = 0; i < priv->num_pipes; i++) {
 407                 if (priv->pipes[i].connector)
 408                         omap_connector_disable_hpd(priv->pipes[i].connector);
 409         }
 410 }
 411 
 412 /*
 413  * drm ioctl funcs
 414  */
 415 
 416 
 417 static int ioctl_get_param(struct drm_device *dev, void *data,
 418                 struct drm_file *file_priv)
 419 {
 420         struct omap_drm_private *priv = dev->dev_private;
 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 = priv->omaprev;
 428                 break;
 429         default:
 430                 DBG("unknown parameter %lld", args->param);
 431                 return -EINVAL;
 432         }
 433 
 434         return 0;
 435 }
 436 
 437 #define OMAP_BO_USER_MASK       0x00ffffff      /* flags settable by userspace */
 438 
 439 static int ioctl_gem_new(struct drm_device *dev, void *data,
 440                 struct drm_file *file_priv)
 441 {
 442         struct drm_omap_gem_new *args = data;
 443         u32 flags = args->flags & OMAP_BO_USER_MASK;
 444 
 445         VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
 446              args->size.bytes, flags);
 447 
 448         return omap_gem_new_handle(dev, file_priv, args->size, flags,
 449                                    &args->handle);
 450 }
 451 
 452 static int ioctl_gem_info(struct drm_device *dev, void *data,
 453                 struct drm_file *file_priv)
 454 {
 455         struct drm_omap_gem_info *args = data;
 456         struct drm_gem_object *obj;
 457         int ret = 0;
 458 
 459         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 460 
 461         obj = drm_gem_object_lookup(file_priv, args->handle);
 462         if (!obj)
 463                 return -ENOENT;
 464 
 465         args->size = omap_gem_mmap_size(obj);
 466         args->offset = omap_gem_mmap_offset(obj);
 467 
 468         drm_gem_object_put_unlocked(obj);
 469 
 470         return ret;
 471 }
 472 
 473 static const struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
 474         DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param,
 475                           DRM_RENDER_ALLOW),
 476         DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, drm_invalid_op,
 477                           DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 478         DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new,
 479                           DRM_RENDER_ALLOW),
 480         /* Deprecated, to be removed. */
 481         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, drm_noop,
 482                           DRM_RENDER_ALLOW),
 483         /* Deprecated, to be removed. */
 484         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, drm_noop,
 485                           DRM_RENDER_ALLOW),
 486         DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info,
 487                           DRM_RENDER_ALLOW),
 488 };
 489 
 490 /*
 491  * drm driver funcs
 492  */
 493 
 494 static int dev_open(struct drm_device *dev, struct drm_file *file)
 495 {
 496         file->driver_priv = NULL;
 497 
 498         DBG("open: dev=%p, file=%p", dev, file);
 499 
 500         return 0;
 501 }
 502 
 503 static const struct vm_operations_struct omap_gem_vm_ops = {
 504         .fault = omap_gem_fault,
 505         .open = drm_gem_vm_open,
 506         .close = drm_gem_vm_close,
 507 };
 508 
 509 static const struct file_operations omapdriver_fops = {
 510         .owner = THIS_MODULE,
 511         .open = drm_open,
 512         .unlocked_ioctl = drm_ioctl,
 513         .compat_ioctl = drm_compat_ioctl,
 514         .release = drm_release,
 515         .mmap = omap_gem_mmap,
 516         .poll = drm_poll,
 517         .read = drm_read,
 518         .llseek = noop_llseek,
 519 };
 520 
 521 static struct drm_driver omap_drm_driver = {
 522         .driver_features = DRIVER_MODESET | DRIVER_GEM  |
 523                 DRIVER_ATOMIC | DRIVER_RENDER,
 524         .open = dev_open,
 525         .lastclose = drm_fb_helper_lastclose,
 526 #ifdef CONFIG_DEBUG_FS
 527         .debugfs_init = omap_debugfs_init,
 528 #endif
 529         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 530         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 531         .gem_prime_export = omap_gem_prime_export,
 532         .gem_prime_import = omap_gem_prime_import,
 533         .gem_free_object_unlocked = omap_gem_free_object,
 534         .gem_vm_ops = &omap_gem_vm_ops,
 535         .dumb_create = omap_gem_dumb_create,
 536         .dumb_map_offset = omap_gem_dumb_map_offset,
 537         .ioctls = ioctls,
 538         .num_ioctls = DRM_OMAP_NUM_IOCTLS,
 539         .fops = &omapdriver_fops,
 540         .name = DRIVER_NAME,
 541         .desc = DRIVER_DESC,
 542         .date = DRIVER_DATE,
 543         .major = DRIVER_MAJOR,
 544         .minor = DRIVER_MINOR,
 545         .patchlevel = DRIVER_PATCHLEVEL,
 546 };
 547 
 548 static const struct soc_device_attribute omapdrm_soc_devices[] = {
 549         { .family = "OMAP3", .data = (void *)0x3430 },
 550         { .family = "OMAP4", .data = (void *)0x4430 },
 551         { .family = "OMAP5", .data = (void *)0x5430 },
 552         { .family = "DRA7",  .data = (void *)0x0752 },
 553         { /* sentinel */ }
 554 };
 555 
 556 static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
 557 {
 558         const struct soc_device_attribute *soc;
 559         struct drm_device *ddev;
 560         unsigned int i;
 561         int ret;
 562 
 563         DBG("%s", dev_name(dev));
 564 
 565         /* Allocate and initialize the DRM device. */
 566         ddev = drm_dev_alloc(&omap_drm_driver, dev);
 567         if (IS_ERR(ddev))
 568                 return PTR_ERR(ddev);
 569 
 570         priv->ddev = ddev;
 571         ddev->dev_private = priv;
 572 
 573         priv->dev = dev;
 574         priv->dss = omapdss_get_dss();
 575         priv->dispc = dispc_get_dispc(priv->dss);
 576         priv->dispc_ops = dispc_get_ops(priv->dss);
 577 
 578         omap_crtc_pre_init(priv);
 579 
 580         soc = soc_device_match(omapdrm_soc_devices);
 581         priv->omaprev = soc ? (unsigned int)soc->data : 0;
 582         priv->wq = alloc_ordered_workqueue("omapdrm", 0);
 583 
 584         mutex_init(&priv->list_lock);
 585         INIT_LIST_HEAD(&priv->obj_list);
 586 
 587         /* Get memory bandwidth limits */
 588         if (priv->dispc_ops->get_memory_bandwidth_limit)
 589                 priv->max_bandwidth =
 590                         priv->dispc_ops->get_memory_bandwidth_limit(priv->dispc);
 591 
 592         omap_gem_init(ddev);
 593 
 594         ret = omap_modeset_init(ddev);
 595         if (ret) {
 596                 dev_err(priv->dev, "omap_modeset_init failed: ret=%d\n", ret);
 597                 goto err_gem_deinit;
 598         }
 599 
 600         /* Initialize vblank handling, start with all CRTCs disabled. */
 601         ret = drm_vblank_init(ddev, priv->num_pipes);
 602         if (ret) {
 603                 dev_err(priv->dev, "could not init vblank\n");
 604                 goto err_cleanup_modeset;
 605         }
 606 
 607         for (i = 0; i < priv->num_pipes; i++)
 608                 drm_crtc_vblank_off(priv->pipes[i].crtc);
 609 
 610         omap_fbdev_init(ddev);
 611 
 612         drm_kms_helper_poll_init(ddev);
 613         omap_modeset_enable_external_hpd(ddev);
 614 
 615         /*
 616          * Register the DRM device with the core and the connectors with
 617          * sysfs.
 618          */
 619         ret = drm_dev_register(ddev, 0);
 620         if (ret)
 621                 goto err_cleanup_helpers;
 622 
 623         return 0;
 624 
 625 err_cleanup_helpers:
 626         omap_modeset_disable_external_hpd(ddev);
 627         drm_kms_helper_poll_fini(ddev);
 628 
 629         omap_fbdev_fini(ddev);
 630 err_cleanup_modeset:
 631         drm_mode_config_cleanup(ddev);
 632         omap_drm_irq_uninstall(ddev);
 633 err_gem_deinit:
 634         omap_gem_deinit(ddev);
 635         destroy_workqueue(priv->wq);
 636         omap_disconnect_pipelines(ddev);
 637         omap_crtc_pre_uninit(priv);
 638         drm_dev_put(ddev);
 639         return ret;
 640 }
 641 
 642 static void omapdrm_cleanup(struct omap_drm_private *priv)
 643 {
 644         struct drm_device *ddev = priv->ddev;
 645 
 646         DBG("");
 647 
 648         drm_dev_unregister(ddev);
 649 
 650         omap_modeset_disable_external_hpd(ddev);
 651         drm_kms_helper_poll_fini(ddev);
 652 
 653         omap_fbdev_fini(ddev);
 654 
 655         drm_atomic_helper_shutdown(ddev);
 656 
 657         drm_mode_config_cleanup(ddev);
 658 
 659         omap_drm_irq_uninstall(ddev);
 660         omap_gem_deinit(ddev);
 661 
 662         destroy_workqueue(priv->wq);
 663 
 664         omap_disconnect_pipelines(ddev);
 665         omap_crtc_pre_uninit(priv);
 666 
 667         drm_dev_put(ddev);
 668 }
 669 
 670 static int pdev_probe(struct platform_device *pdev)
 671 {
 672         struct omap_drm_private *priv;
 673         int ret;
 674 
 675         if (omapdss_is_initialized() == false)
 676                 return -EPROBE_DEFER;
 677 
 678         ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 679         if (ret) {
 680                 dev_err(&pdev->dev, "Failed to set the DMA mask\n");
 681                 return ret;
 682         }
 683 
 684         /* Allocate and initialize the driver private structure. */
 685         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 686         if (!priv)
 687                 return -ENOMEM;
 688 
 689         platform_set_drvdata(pdev, priv);
 690 
 691         ret = omapdrm_init(priv, &pdev->dev);
 692         if (ret < 0)
 693                 kfree(priv);
 694 
 695         return ret;
 696 }
 697 
 698 static int pdev_remove(struct platform_device *pdev)
 699 {
 700         struct omap_drm_private *priv = platform_get_drvdata(pdev);
 701 
 702         omapdrm_cleanup(priv);
 703         kfree(priv);
 704 
 705         return 0;
 706 }
 707 
 708 #ifdef CONFIG_PM_SLEEP
 709 static int omap_drm_suspend(struct device *dev)
 710 {
 711         struct omap_drm_private *priv = dev_get_drvdata(dev);
 712         struct drm_device *drm_dev = priv->ddev;
 713 
 714         return drm_mode_config_helper_suspend(drm_dev);
 715 }
 716 
 717 static int omap_drm_resume(struct device *dev)
 718 {
 719         struct omap_drm_private *priv = dev_get_drvdata(dev);
 720         struct drm_device *drm_dev = priv->ddev;
 721 
 722         drm_mode_config_helper_resume(drm_dev);
 723 
 724         return omap_gem_resume(drm_dev);
 725 }
 726 #endif
 727 
 728 static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume);
 729 
 730 static struct platform_driver pdev = {
 731         .driver = {
 732                 .name = "omapdrm",
 733                 .pm = &omapdrm_pm_ops,
 734         },
 735         .probe = pdev_probe,
 736         .remove = pdev_remove,
 737 };
 738 
 739 static struct platform_driver * const drivers[] = {
 740         &omap_dmm_driver,
 741         &pdev,
 742 };
 743 
 744 static int __init omap_drm_init(void)
 745 {
 746         DBG("init");
 747 
 748         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 749 }
 750 
 751 static void __exit omap_drm_fini(void)
 752 {
 753         DBG("fini");
 754 
 755         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 756 }
 757 
 758 /* need late_initcall() so we load after dss_driver's are loaded */
 759 late_initcall(omap_drm_init);
 760 module_exit(omap_drm_fini);
 761 
 762 MODULE_AUTHOR("Rob Clark <rob@ti.com>");
 763 MODULE_DESCRIPTION("OMAP DRM Display Driver");
 764 MODULE_ALIAS("platform:" DRIVER_NAME);
 765 MODULE_LICENSE("GPL v2");