drivers/gpu/drm/omapdrm/omap_drv.c

   1 /*
   2  * drivers/gpu/drm/omapdrm/omap_drv.c
   3  *
   4  * Copyright (C) 2011 Texas Instruments
   5  * Author: Rob Clark <rob@ti.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <linux/wait.h>
  21
  22 #include <drm/drm_atomic.h>
  23 #include <drm/drm_atomic_helper.h>
  24 #include <drm/drm_crtc_helper.h>
  25 #include <drm/drm_fb_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 static int num_crtc = CONFIG_DRM_OMAP_NUM_CRTCS;
  38
  39 MODULE_PARM_DESC(num_crtc, "Number of overlays to use as CRTCs");
  40 module_param(num_crtc, int, 0600);
  41
  42 /*
  43  * mode config funcs
  44  */
  45
  46 /* Notes about mapping DSS and DRM entities:
  47  *    CRTC:        overlay
  48  *    encoder:     manager.. with some extension to allow one primary CRTC
  49  *                 and zero or more video CRTC's to be mapped to one encoder?
  50  *    connector:   dssdev.. manager can be attached/detached from different
  51  *                 devices
  52  */
  53
  54 static void omap_fb_output_poll_changed(struct drm_device *dev)
  55 {
  56         struct omap_drm_private *priv = dev->dev_private;
  57         DBG("dev=%p", dev);
  58         if (priv->fbdev)
  59                 drm_fb_helper_hotplug_event(priv->fbdev);
  60 }
  61
  62 struct omap_atomic_state_commit {
  63         struct work_struct work;
  64         struct drm_device *dev;
  65         struct drm_atomic_state *state;
  66         u32 crtcs;
  67 };
  68
  69 static void omap_atomic_wait_for_completion(struct drm_device *dev,
  70                                             struct drm_atomic_state *old_state)
  71 {
  72         struct drm_crtc_state *old_crtc_state;
  73         struct drm_crtc *crtc;
  74         unsigned int i;
  75         int ret;
  76
  77         for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
  78                 if (!crtc->state->enable)
  79                         continue;
  80
  81                 ret = omap_crtc_wait_pending(crtc);
  82
  83                 if (!ret)
  84                         dev_warn(dev->dev,
  85                                  "atomic complete timeout (pipe %u)!\n", i);
  86         }
  87 }
  88
  89 static void omap_atomic_complete(struct omap_atomic_state_commit *commit)
  90 {
  91         struct drm_device *dev = commit->dev;
  92         struct omap_drm_private *priv = dev->dev_private;
  93         struct drm_atomic_state *old_state = commit->state;
  94
  95         /* Apply the atomic update. */
  96         dispc_runtime_get();
  97
  98         drm_atomic_helper_commit_modeset_disables(dev, old_state);
  99         drm_atomic_helper_commit_planes(dev, old_state, 0);
 100         drm_atomic_helper_commit_modeset_enables(dev, old_state);
 101
 102         omap_atomic_wait_for_completion(dev, old_state);
 103
 104         drm_atomic_helper_cleanup_planes(dev, old_state);
 105
 106         dispc_runtime_put();
 107
 108         drm_atomic_state_put(old_state);
 109
 110         /* Complete the commit, wake up any waiter. */
 111         spin_lock(&priv->commit.lock);
 112         priv->commit.pending &= ~commit->crtcs;
 113         spin_unlock(&priv->commit.lock);
 114
 115         wake_up_all(&priv->commit.wait);
 116
 117         kfree(commit);
 118 }
 119
 120 static void omap_atomic_work(struct work_struct *work)
 121 {
 122         struct omap_atomic_state_commit *commit =
 123                 container_of(work, struct omap_atomic_state_commit, work);
 124
 125         omap_atomic_complete(commit);
 126 }
 127
 128 static bool omap_atomic_is_pending(struct omap_drm_private *priv,
 129                                    struct omap_atomic_state_commit *commit)
 130 {
 131         bool pending;
 132
 133         spin_lock(&priv->commit.lock);
 134         pending = priv->commit.pending & commit->crtcs;
 135         spin_unlock(&priv->commit.lock);
 136
 137         return pending;
 138 }
 139
 140 static int omap_atomic_commit(struct drm_device *dev,
 141                               struct drm_atomic_state *state, bool nonblock)
 142 {
 143         struct omap_drm_private *priv = dev->dev_private;
 144         struct omap_atomic_state_commit *commit;
 145         struct drm_crtc *crtc;
 146         struct drm_crtc_state *crtc_state;
 147         int i, ret;
 148
 149         ret = drm_atomic_helper_prepare_planes(dev, state);
 150         if (ret)
 151                 return ret;
 152
 153         /* Allocate the commit object. */
 154         commit = kzalloc(sizeof(*commit), GFP_KERNEL);
 155         if (commit == NULL) {
 156                 ret = -ENOMEM;
 157                 goto error;
 158         }
 159
 160         INIT_WORK(&commit->work, omap_atomic_work);
 161         commit->dev = dev;
 162         commit->state = state;
 163
 164         /* Wait until all affected CRTCs have completed previous commits and
 165          * mark them as pending.
 166          */
 167         for_each_crtc_in_state(state, crtc, crtc_state, i)
 168                 commit->crtcs |= drm_crtc_mask(crtc);
 169
 170         wait_event(priv->commit.wait, !omap_atomic_is_pending(priv, commit));
 171
 172         spin_lock(&priv->commit.lock);
 173         priv->commit.pending |= commit->crtcs;
 174         spin_unlock(&priv->commit.lock);
 175
 176         /* Swap the state, this is the point of no return. */
 177         drm_atomic_helper_swap_state(state, true);
 178
 179         drm_atomic_state_get(state);
 180         if (nonblock)
 181                 schedule_work(&commit->work);
 182         else
 183                 omap_atomic_complete(commit);
 184
 185         return 0;
 186
 187 error:
 188         drm_atomic_helper_cleanup_planes(dev, state);
 189         return ret;
 190 }
 191
 192 static const struct drm_mode_config_funcs omap_mode_config_funcs = {
 193         .fb_create = omap_framebuffer_create,
 194         .output_poll_changed = omap_fb_output_poll_changed,
 195         .atomic_check = drm_atomic_helper_check,
 196         .atomic_commit = omap_atomic_commit,
 197 };
 198
 199 static int get_connector_type(struct omap_dss_device *dssdev)
 200 {
 201         switch (dssdev->type) {
 202         case OMAP_DISPLAY_TYPE_HDMI:
 203                 return DRM_MODE_CONNECTOR_HDMIA;
 204         case OMAP_DISPLAY_TYPE_DVI:
 205                 return DRM_MODE_CONNECTOR_DVID;
 206         case OMAP_DISPLAY_TYPE_DSI:
 207                 return DRM_MODE_CONNECTOR_DSI;
 208         default:
 209                 return DRM_MODE_CONNECTOR_Unknown;
 210         }
 211 }
 212
 213 static bool channel_used(struct drm_device *dev, enum omap_channel channel)
 214 {
 215         struct omap_drm_private *priv = dev->dev_private;
 216         int i;
 217
 218         for (i = 0; i < priv->num_crtcs; i++) {
 219                 struct drm_crtc *crtc = priv->crtcs[i];
 220
 221                 if (omap_crtc_channel(crtc) == channel)
 222                         return true;
 223         }
 224
 225         return false;
 226 }
 227 static void omap_disconnect_dssdevs(void)
 228 {
 229         struct omap_dss_device *dssdev = NULL;
 230
 231         for_each_dss_dev(dssdev)
 232                 dssdev->driver->disconnect(dssdev);
 233 }
 234
 235 static int omap_connect_dssdevs(void)
 236 {
 237         int r;
 238         struct omap_dss_device *dssdev = NULL;
 239         bool no_displays = true;
 240
 241         for_each_dss_dev(dssdev) {
 242                 r = dssdev->driver->connect(dssdev);
 243                 if (r == -EPROBE_DEFER) {
 244                         omap_dss_put_device(dssdev);
 245                         goto cleanup;
 246                 } else if (r) {
 247                         dev_warn(dssdev->dev, "could not connect display: %s\n",
 248                                 dssdev->name);
 249                 } else {
 250                         no_displays = false;
 251                 }
 252         }
 253
 254         if (no_displays)
 255                 return -EPROBE_DEFER;
 256
 257         return 0;
 258
 259 cleanup:
 260         /*
 261          * if we are deferring probe, we disconnect the devices we previously
 262          * connected
 263          */
 264         omap_disconnect_dssdevs();
 265
 266         return r;
 267 }
 268
 269 static int omap_modeset_create_crtc(struct drm_device *dev, int id,
 270                                     enum omap_channel channel,
 271                                     u32 possible_crtcs)
 272 {
 273         struct omap_drm_private *priv = dev->dev_private;
 274         struct drm_plane *plane;
 275         struct drm_crtc *crtc;
 276
 277         plane = omap_plane_init(dev, id, DRM_PLANE_TYPE_PRIMARY,
 278                 possible_crtcs);
 279         if (IS_ERR(plane))
 280                 return PTR_ERR(plane);
 281
 282         crtc = omap_crtc_init(dev, plane, channel, id);
 283
 284         BUG_ON(priv->num_crtcs >= ARRAY_SIZE(priv->crtcs));
 285         priv->crtcs[id] = crtc;
 286         priv->num_crtcs++;
 287
 288         priv->planes[id] = plane;
 289         priv->num_planes++;
 290
 291         return 0;
 292 }
 293
 294 static int omap_modeset_init_properties(struct drm_device *dev)
 295 {
 296         struct omap_drm_private *priv = dev->dev_private;
 297
 298         priv->zorder_prop = drm_property_create_range(dev, 0, "zorder", 0, 3);
 299         if (!priv->zorder_prop)
 300                 return -ENOMEM;
 301
 302         return 0;
 303 }
 304
 305 static int omap_modeset_init(struct drm_device *dev)
 306 {
 307         struct omap_drm_private *priv = dev->dev_private;
 308         struct omap_dss_device *dssdev = NULL;
 309         int num_ovls = dss_feat_get_num_ovls();
 310         int num_mgrs = dss_feat_get_num_mgrs();
 311         int num_crtcs;
 312         int i, id = 0;
 313         int ret;
 314         u32 possible_crtcs;
 315
 316         drm_mode_config_init(dev);
 317
 318         omap_drm_irq_install(dev);
 319
 320         ret = omap_modeset_init_properties(dev);
 321         if (ret < 0)
 322                 return ret;
 323
 324         /*
 325          * We usually don't want to create a CRTC for each manager, at least
 326          * not until we have a way to expose private planes to userspace.
 327          * Otherwise there would not be enough video pipes left for drm planes.
 328          * We use the num_crtc argument to limit the number of crtcs we create.
 329          */
 330         num_crtcs = min3(num_crtc, num_mgrs, num_ovls);
 331         possible_crtcs = (1 << num_crtcs) - 1;
 332
 333         dssdev = NULL;
 334
 335         for_each_dss_dev(dssdev) {
 336                 struct drm_connector *connector;
 337                 struct drm_encoder *encoder;
 338                 enum omap_channel channel;
 339                 struct omap_dss_device *out;
 340
 341                 if (!omapdss_device_is_connected(dssdev))
 342                         continue;
 343
 344                 encoder = omap_encoder_init(dev, dssdev);
 345
 346                 if (!encoder) {
 347                         dev_err(dev->dev, "could not create encoder: %s\n",
 348                                         dssdev->name);
 349                         return -ENOMEM;
 350                 }
 351
 352                 connector = omap_connector_init(dev,
 353                                 get_connector_type(dssdev), dssdev, encoder);
 354
 355                 if (!connector) {
 356                         dev_err(dev->dev, "could not create connector: %s\n",
 357                                         dssdev->name);
 358                         return -ENOMEM;
 359                 }
 360
 361                 BUG_ON(priv->num_encoders >= ARRAY_SIZE(priv->encoders));
 362                 BUG_ON(priv->num_connectors >= ARRAY_SIZE(priv->connectors));
 363
 364                 priv->encoders[priv->num_encoders++] = encoder;
 365                 priv->connectors[priv->num_connectors++] = connector;
 366
 367                 drm_mode_connector_attach_encoder(connector, encoder);
 368
 369                 /*
 370                  * if we have reached the limit of the crtcs we are allowed to
 371                  * create, let's not try to look for a crtc for this
 372                  * panel/encoder and onwards, we will, of course, populate the
 373                  * the possible_crtcs field for all the encoders with the final
 374                  * set of crtcs we create
 375                  */
 376                 if (id == num_crtcs)
 377                         continue;
 378
 379                 /*
 380                  * get the recommended DISPC channel for this encoder. For now,
 381                  * we only try to get create a crtc out of the recommended, the
 382                  * other possible channels to which the encoder can connect are
 383                  * not considered.
 384                  */
 385
 386                 out = omapdss_find_output_from_display(dssdev);
 387                 channel = out->dispc_channel;
 388                 omap_dss_put_device(out);
 389
 390                 /*
 391                  * if this channel hasn't already been taken by a previously
 392                  * allocated crtc, we create a new crtc for it
 393                  */
 394                 if (!channel_used(dev, channel)) {
 395                         ret = omap_modeset_create_crtc(dev, id, channel,
 396                                 possible_crtcs);
 397                         if (ret < 0) {
 398                                 dev_err(dev->dev,
 399                                         "could not create CRTC (channel %u)\n",
 400                                         channel);
 401                                 return ret;
 402                         }
 403
 404                         id++;
 405                 }
 406         }
 407
 408         /*
 409          * we have allocated crtcs according to the need of the panels/encoders,
 410          * adding more crtcs here if needed
 411          */
 412         for (; id < num_crtcs; id++) {
 413
 414                 /* find a free manager for this crtc */
 415                 for (i = 0; i < num_mgrs; i++) {
 416                         if (!channel_used(dev, i))
 417                                 break;
 418                 }
 419
 420                 if (i == num_mgrs) {
 421                         /* this shouldn't really happen */
 422                         dev_err(dev->dev, "no managers left for crtc\n");
 423                         return -ENOMEM;
 424                 }
 425
 426                 ret = omap_modeset_create_crtc(dev, id, i,
 427                         possible_crtcs);
 428                 if (ret < 0) {
 429                         dev_err(dev->dev,
 430                                 "could not create CRTC (channel %u)\n", i);
 431                         return ret;
 432                 }
 433         }
 434
 435         /*
 436          * Create normal planes for the remaining overlays:
 437          */
 438         for (; id < num_ovls; id++) {
 439                 struct drm_plane *plane;
 440
 441                 plane = omap_plane_init(dev, id, DRM_PLANE_TYPE_OVERLAY,
 442                         possible_crtcs);
 443                 if (IS_ERR(plane))
 444                         return PTR_ERR(plane);
 445
 446                 BUG_ON(priv->num_planes >= ARRAY_SIZE(priv->planes));
 447                 priv->planes[priv->num_planes++] = plane;
 448         }
 449
 450         for (i = 0; i < priv->num_encoders; i++) {
 451                 struct drm_encoder *encoder = priv->encoders[i];
 452                 struct omap_dss_device *dssdev =
 453                                         omap_encoder_get_dssdev(encoder);
 454                 struct omap_dss_device *output;
 455
 456                 output = omapdss_find_output_from_display(dssdev);
 457
 458                 /* figure out which crtc's we can connect the encoder to: */
 459                 encoder->possible_crtcs = 0;
 460                 for (id = 0; id < priv->num_crtcs; id++) {
 461                         struct drm_crtc *crtc = priv->crtcs[id];
 462                         enum omap_channel crtc_channel;
 463
 464                         crtc_channel = omap_crtc_channel(crtc);
 465
 466                         if (output->dispc_channel == crtc_channel) {
 467                                 encoder->possible_crtcs |= (1 << id);
 468                                 break;
 469                         }
 470                 }
 471
 472                 omap_dss_put_device(output);
 473         }
 474
 475         DBG("registered %d planes, %d crtcs, %d encoders and %d connectors\n",
 476                 priv->num_planes, priv->num_crtcs, priv->num_encoders,
 477                 priv->num_connectors);
 478
 479         dev->mode_config.min_width = 32;
 480         dev->mode_config.min_height = 32;
 481
 482         /* note: eventually will need some cpu_is_omapXYZ() type stuff here
 483          * to fill in these limits properly on different OMAP generations..
 484          */
 485         dev->mode_config.max_width = 2048;
 486         dev->mode_config.max_height = 2048;
 487
 488         dev->mode_config.funcs = &omap_mode_config_funcs;
 489
 490         drm_mode_config_reset(dev);
 491
 492         return 0;
 493 }
 494
 495 static void omap_modeset_free(struct drm_device *dev)
 496 {
 497         drm_mode_config_cleanup(dev);
 498 }
 499
 500 /*
 501  * drm ioctl funcs
 502  */
 503
 504
 505 static int ioctl_get_param(struct drm_device *dev, void *data,
 506                 struct drm_file *file_priv)
 507 {
 508         struct omap_drm_private *priv = dev->dev_private;
 509         struct drm_omap_param *args = data;
 510
 511         DBG("%p: param=%llu", dev, args->param);
 512
 513         switch (args->param) {
 514         case OMAP_PARAM_CHIPSET_ID:
 515                 args->value = priv->omaprev;
 516                 break;
 517         default:
 518                 DBG("unknown parameter %lld", args->param);
 519                 return -EINVAL;
 520         }
 521
 522         return 0;
 523 }
 524
 525 static int ioctl_set_param(struct drm_device *dev, void *data,
 526                 struct drm_file *file_priv)
 527 {
 528         struct drm_omap_param *args = data;
 529
 530         switch (args->param) {
 531         default:
 532                 DBG("unknown parameter %lld", args->param);
 533                 return -EINVAL;
 534         }
 535
 536         return 0;
 537 }
 538
 539 #define OMAP_BO_USER_MASK       0x00ffffff      /* flags settable by userspace */
 540
 541 static int ioctl_gem_new(struct drm_device *dev, void *data,
 542                 struct drm_file *file_priv)
 543 {
 544         struct drm_omap_gem_new *args = data;
 545         u32 flags = args->flags & OMAP_BO_USER_MASK;
 546
 547         VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
 548              args->size.bytes, flags);
 549
 550         return omap_gem_new_handle(dev, file_priv, args->size, flags,
 551                                    &args->handle);
 552 }
 553
 554 static int ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
 555                 struct drm_file *file_priv)
 556 {
 557         struct drm_omap_gem_cpu_prep *args = data;
 558         struct drm_gem_object *obj;
 559         int ret;
 560
 561         VERB("%p:%p: handle=%d, op=%x", dev, file_priv, args->handle, args->op);
 562
 563         obj = drm_gem_object_lookup(file_priv, args->handle);
 564         if (!obj)
 565                 return -ENOENT;
 566
 567         ret = omap_gem_op_sync(obj, args->op);
 568
 569         if (!ret)
 570                 ret = omap_gem_op_start(obj, args->op);
 571
 572         drm_gem_object_unreference_unlocked(obj);
 573
 574         return ret;
 575 }
 576
 577 static int ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
 578                 struct drm_file *file_priv)
 579 {
 580         struct drm_omap_gem_cpu_fini *args = data;
 581         struct drm_gem_object *obj;
 582         int ret;
 583
 584         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 585
 586         obj = drm_gem_object_lookup(file_priv, args->handle);
 587         if (!obj)
 588                 return -ENOENT;
 589
 590         /* XXX flushy, flushy */
 591         ret = 0;
 592
 593         if (!ret)
 594                 ret = omap_gem_op_finish(obj, args->op);
 595
 596         drm_gem_object_unreference_unlocked(obj);
 597
 598         return ret;
 599 }
 600
 601 static int ioctl_gem_info(struct drm_device *dev, void *data,
 602                 struct drm_file *file_priv)
 603 {
 604         struct drm_omap_gem_info *args = data;
 605         struct drm_gem_object *obj;
 606         int ret = 0;
 607
 608         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 609
 610         obj = drm_gem_object_lookup(file_priv, args->handle);
 611         if (!obj)
 612                 return -ENOENT;
 613
 614         args->size = omap_gem_mmap_size(obj);
 615         args->offset = omap_gem_mmap_offset(obj);
 616
 617         drm_gem_object_unreference_unlocked(obj);
 618
 619         return ret;
 620 }
 621
 622 static const struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
 623         DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param, DRM_AUTH),
 624         DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 625         DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_AUTH),
 626         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, ioctl_gem_cpu_prep, DRM_AUTH),
 627         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, ioctl_gem_cpu_fini, DRM_AUTH),
 628         DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_AUTH),
 629 };
 630
 631 /*
 632  * drm driver funcs
 633  */
 634
 635 /**
 636  * load - setup chip and create an initial config
 637  * @dev: DRM device
 638  * @flags: startup flags
 639  *
 640  * The driver load routine has to do several things:
 641  *   - initialize the memory manager
 642  *   - allocate initial config memory
 643  *   - setup the DRM framebuffer with the allocated memory
 644  */
 645 static int dev_load(struct drm_device *dev, unsigned long flags)
 646 {
 647         struct omap_drm_platform_data *pdata = dev->dev->platform_data;
 648         struct omap_drm_private *priv;
 649         unsigned int i;
 650         int ret;
 651
 652         DBG("load: dev=%p", dev);
 653
 654         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 655         if (!priv)
 656                 return -ENOMEM;
 657
 658         priv->omaprev = pdata->omaprev;
 659
 660         dev->dev_private = priv;
 661
 662         priv->wq = alloc_ordered_workqueue("omapdrm", 0);
 663         init_waitqueue_head(&priv->commit.wait);
 664         spin_lock_init(&priv->commit.lock);
 665
 666         spin_lock_init(&priv->list_lock);
 667         INIT_LIST_HEAD(&priv->obj_list);
 668
 669         omap_gem_init(dev);
 670
 671         ret = omap_modeset_init(dev);
 672         if (ret) {
 673                 dev_err(dev->dev, "omap_modeset_init failed: ret=%d\n", ret);
 674                 dev->dev_private = NULL;
 675                 kfree(priv);
 676                 return ret;
 677         }
 678
 679         /* Initialize vblank handling, start with all CRTCs disabled. */
 680         ret = drm_vblank_init(dev, priv->num_crtcs);
 681         if (ret)
 682                 dev_warn(dev->dev, "could not init vblank\n");
 683
 684         for (i = 0; i < priv->num_crtcs; i++)
 685                 drm_crtc_vblank_off(priv->crtcs[i]);
 686
 687         priv->fbdev = omap_fbdev_init(dev);
 688
 689         /* store off drm_device for use in pm ops */
 690         dev_set_drvdata(dev->dev, dev);
 691
 692         drm_kms_helper_poll_init(dev);
 693
 694         return 0;
 695 }
 696
 697 static void dev_unload(struct drm_device *dev)
 698 {
 699         struct omap_drm_private *priv = dev->dev_private;
 700
 701         DBG("unload: dev=%p", dev);
 702
 703         drm_kms_helper_poll_fini(dev);
 704
 705         if (priv->fbdev)
 706                 omap_fbdev_free(dev);
 707
 708         omap_modeset_free(dev);
 709         omap_gem_deinit(dev);
 710
 711         destroy_workqueue(priv->wq);
 712
 713         drm_vblank_cleanup(dev);
 714         omap_drm_irq_uninstall(dev);
 715
 716         kfree(dev->dev_private);
 717         dev->dev_private = NULL;
 718
 719         dev_set_drvdata(dev->dev, NULL);
 720 }
 721
 722 static int dev_open(struct drm_device *dev, struct drm_file *file)
 723 {
 724         file->driver_priv = NULL;
 725
 726         DBG("open: dev=%p, file=%p", dev, file);
 727
 728         return 0;
 729 }
 730
 731 /**
 732  * lastclose - clean up after all DRM clients have exited
 733  * @dev: DRM device
 734  *
 735  * Take care of cleaning up after all DRM clients have exited.  In the
 736  * mode setting case, we want to restore the kernel's initial mode (just
 737  * in case the last client left us in a bad state).
 738  */
 739 static void dev_lastclose(struct drm_device *dev)
 740 {
 741         int i;
 742
 743         /* we don't support vga_switcheroo.. so just make sure the fbdev
 744          * mode is active
 745          */
 746         struct omap_drm_private *priv = dev->dev_private;
 747         int ret;
 748
 749         DBG("lastclose: dev=%p", dev);
 750
 751         /* need to restore default rotation state.. not sure
 752          * if there is a cleaner way to restore properties to
 753          * default state?  Maybe a flag that properties should
 754          * automatically be restored to default state on
 755          * lastclose?
 756          */
 757         for (i = 0; i < priv->num_crtcs; i++) {
 758                 struct drm_crtc *crtc = priv->crtcs[i];
 759
 760                 if (!crtc->primary->rotation_property)
 761                         continue;
 762
 763                 drm_object_property_set_value(&crtc->base,
 764                                               crtc->primary->rotation_property,
 765                                               DRM_ROTATE_0);
 766         }
 767
 768         for (i = 0; i < priv->num_planes; i++) {
 769                 struct drm_plane *plane = priv->planes[i];
 770
 771                 if (!plane->rotation_property)
 772                         continue;
 773
 774                 drm_object_property_set_value(&plane->base,
 775                                               plane->rotation_property,
 776                                               DRM_ROTATE_0);
 777         }
 778
 779         if (priv->fbdev) {
 780                 ret = drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
 781                 if (ret)
 782                         DBG("failed to restore crtc mode");
 783         }
 784 }
 785
 786 static const struct vm_operations_struct omap_gem_vm_ops = {
 787         .fault = omap_gem_fault,
 788         .open = drm_gem_vm_open,
 789         .close = drm_gem_vm_close,
 790 };
 791
 792 static const struct file_operations omapdriver_fops = {
 793         .owner = THIS_MODULE,
 794         .open = drm_open,
 795         .unlocked_ioctl = drm_ioctl,
 796         .release = drm_release,
 797         .mmap = omap_gem_mmap,
 798         .poll = drm_poll,
 799         .read = drm_read,
 800         .llseek = noop_llseek,
 801 };
 802
 803 static struct drm_driver omap_drm_driver = {
 804         .driver_features = DRIVER_MODESET | DRIVER_GEM  | DRIVER_PRIME |
 805                 DRIVER_ATOMIC,
 806         .load = dev_load,
 807         .unload = dev_unload,
 808         .open = dev_open,
 809         .lastclose = dev_lastclose,
 810         .get_vblank_counter = drm_vblank_no_hw_counter,
 811         .enable_vblank = omap_irq_enable_vblank,
 812         .disable_vblank = omap_irq_disable_vblank,
 813 #ifdef CONFIG_DEBUG_FS
 814         .debugfs_init = omap_debugfs_init,
 815         .debugfs_cleanup = omap_debugfs_cleanup,
 816 #endif
 817         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 818         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 819         .gem_prime_export = omap_gem_prime_export,
 820         .gem_prime_import = omap_gem_prime_import,
 821         .gem_free_object = omap_gem_free_object,
 822         .gem_vm_ops = &omap_gem_vm_ops,
 823         .dumb_create = omap_gem_dumb_create,
 824         .dumb_map_offset = omap_gem_dumb_map_offset,
 825         .dumb_destroy = drm_gem_dumb_destroy,
 826         .ioctls = ioctls,
 827         .num_ioctls = DRM_OMAP_NUM_IOCTLS,
 828         .fops = &omapdriver_fops,
 829         .name = DRIVER_NAME,
 830         .desc = DRIVER_DESC,
 831         .date = DRIVER_DATE,
 832         .major = DRIVER_MAJOR,
 833         .minor = DRIVER_MINOR,
 834         .patchlevel = DRIVER_PATCHLEVEL,
 835 };
 836
 837 static int pdev_probe(struct platform_device *device)
 838 {
 839         int r;
 840
 841         if (omapdss_is_initialized() == false)
 842                 return -EPROBE_DEFER;
 843
 844         omap_crtc_pre_init();
 845
 846         r = omap_connect_dssdevs();
 847         if (r) {
 848                 omap_crtc_pre_uninit();
 849                 return r;
 850         }
 851
 852         DBG("%s", device->name);
 853         return drm_platform_init(&omap_drm_driver, device);
 854 }
 855
 856 static int pdev_remove(struct platform_device *device)
 857 {
 858         DBG("");
 859
 860         drm_put_dev(platform_get_drvdata(device));
 861
 862         omap_disconnect_dssdevs();
 863         omap_crtc_pre_uninit();
 864
 865         return 0;
 866 }
 867
 868 #ifdef CONFIG_PM_SLEEP
 869 static int omap_drm_suspend_all_displays(void)
 870 {
 871         struct omap_dss_device *dssdev = NULL;
 872
 873         for_each_dss_dev(dssdev) {
 874                 if (!dssdev->driver)
 875                         continue;
 876
 877                 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
 878                         dssdev->driver->disable(dssdev);
 879                         dssdev->activate_after_resume = true;
 880                 } else {
 881                         dssdev->activate_after_resume = false;
 882                 }
 883         }
 884
 885         return 0;
 886 }
 887
 888 static int omap_drm_resume_all_displays(void)
 889 {
 890         struct omap_dss_device *dssdev = NULL;
 891
 892         for_each_dss_dev(dssdev) {
 893                 if (!dssdev->driver)
 894                         continue;
 895
 896                 if (dssdev->activate_after_resume) {
 897                         dssdev->driver->enable(dssdev);
 898                         dssdev->activate_after_resume = false;
 899                 }
 900         }
 901
 902         return 0;
 903 }
 904
 905 static int omap_drm_suspend(struct device *dev)
 906 {
 907         struct drm_device *drm_dev = dev_get_drvdata(dev);
 908
 909         drm_kms_helper_poll_disable(drm_dev);
 910
 911         drm_modeset_lock_all(drm_dev);
 912         omap_drm_suspend_all_displays();
 913         drm_modeset_unlock_all(drm_dev);
 914
 915         return 0;
 916 }
 917
 918 static int omap_drm_resume(struct device *dev)
 919 {
 920         struct drm_device *drm_dev = dev_get_drvdata(dev);
 921
 922         drm_modeset_lock_all(drm_dev);
 923         omap_drm_resume_all_displays();
 924         drm_modeset_unlock_all(drm_dev);
 925
 926         drm_kms_helper_poll_enable(drm_dev);
 927
 928         return omap_gem_resume(dev);
 929 }
 930 #endif
 931
 932 static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume);
 933
 934 static struct platform_driver pdev = {
 935         .driver = {
 936                 .name = DRIVER_NAME,
 937                 .pm = &omapdrm_pm_ops,
 938         },
 939         .probe = pdev_probe,
 940         .remove = pdev_remove,
 941 };
 942
 943 static struct platform_driver * const drivers[] = {
 944         &omap_dmm_driver,
 945         &pdev,
 946 };
 947
 948 static int __init omap_drm_init(void)
 949 {
 950         DBG("init");
 951
 952         return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 953 }
 954
 955 static void __exit omap_drm_fini(void)
 956 {
 957         DBG("fini");
 958
 959         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 960 }
 961
 962 /* need late_initcall() so we load after dss_driver's are loaded */
 963 late_initcall(omap_drm_init);
 964 module_exit(omap_drm_fini);
 965
 966 MODULE_AUTHOR("Rob Clark <rob@ti.com>");
 967 MODULE_DESCRIPTION("OMAP DRM Display Driver");
 968 MODULE_ALIAS("platform:" DRIVER_NAME);
 969 MODULE_LICENSE("GPL v2");