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 "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 static int num_crtc = CONFIG_DRM_OMAP_NUM_CRTCS;
  34
  35 MODULE_PARM_DESC(num_crtc, "Number of overlays to use as CRTCs");
  36 module_param(num_crtc, int, 0600);
  37
  38 /*
  39  * mode config funcs
  40  */
  41
  42 /* Notes about mapping DSS and DRM entities:
  43  *    CRTC:        overlay
  44  *    encoder:     manager.. with some extension to allow one primary CRTC
  45  *                 and zero or more video CRTC's to be mapped to one encoder?
  46  *    connector:   dssdev.. manager can be attached/detached from different
  47  *                 devices
  48  */
  49
  50 static void omap_fb_output_poll_changed(struct drm_device *dev)
  51 {
  52         struct omap_drm_private *priv = dev->dev_private;
  53         DBG("dev=%p", dev);
  54         if (priv->fbdev)
  55                 drm_fb_helper_hotplug_event(priv->fbdev);
  56 }
  57
  58 static const struct drm_mode_config_funcs omap_mode_config_funcs = {
  59         .fb_create = omap_framebuffer_create,
  60         .output_poll_changed = omap_fb_output_poll_changed,
  61 };
  62
  63 static int get_connector_type(struct omap_dss_device *dssdev)
  64 {
  65         switch (dssdev->type) {
  66         case OMAP_DISPLAY_TYPE_HDMI:
  67                 return DRM_MODE_CONNECTOR_HDMIA;
  68         case OMAP_DISPLAY_TYPE_DPI:
  69                 if (!strcmp(dssdev->name, "dvi"))
  70                         return DRM_MODE_CONNECTOR_DVID;
  71                 /* fallthrough */
  72         default:
  73                 return DRM_MODE_CONNECTOR_Unknown;
  74         }
  75 }
  76
  77 static int omap_modeset_init(struct drm_device *dev)
  78 {
  79         struct omap_drm_private *priv = dev->dev_private;
  80         struct omap_dss_device *dssdev = NULL;
  81         int num_ovls = dss_feat_get_num_ovls();
  82         int id;
  83
  84         drm_mode_config_init(dev);
  85
  86         omap_drm_irq_install(dev);
  87
  88         /*
  89          * Create private planes and CRTCs for the last NUM_CRTCs overlay
  90          * plus manager:
  91          */
  92         for (id = 0; id < min(num_crtc, num_ovls); id++) {
  93                 struct drm_plane *plane;
  94                 struct drm_crtc *crtc;
  95
  96                 plane = omap_plane_init(dev, id, true);
  97                 crtc = omap_crtc_init(dev, plane, pipe2chan(id), id);
  98
  99                 BUG_ON(priv->num_crtcs >= ARRAY_SIZE(priv->crtcs));
 100                 priv->crtcs[id] = crtc;
 101                 priv->num_crtcs++;
 102
 103                 priv->planes[id] = plane;
 104                 priv->num_planes++;
 105         }
 106
 107         /*
 108          * Create normal planes for the remaining overlays:
 109          */
 110         for (; id < num_ovls; id++) {
 111                 struct drm_plane *plane = omap_plane_init(dev, id, false);
 112
 113                 BUG_ON(priv->num_planes >= ARRAY_SIZE(priv->planes));
 114                 priv->planes[priv->num_planes++] = plane;
 115         }
 116
 117         for_each_dss_dev(dssdev) {
 118                 struct drm_connector *connector;
 119                 struct drm_encoder *encoder;
 120
 121                 if (!dssdev->driver) {
 122                         dev_warn(dev->dev, "%s has no driver.. skipping it\n",
 123                                         dssdev->name);
 124                         return 0;
 125                 }
 126
 127                 if (!(dssdev->driver->get_timings ||
 128                                         dssdev->driver->read_edid)) {
 129                         dev_warn(dev->dev, "%s driver does not support "
 130                                 "get_timings or read_edid.. skipping it!\n",
 131                                 dssdev->name);
 132                         return 0;
 133                 }
 134
 135                 encoder = omap_encoder_init(dev, dssdev);
 136
 137                 if (!encoder) {
 138                         dev_err(dev->dev, "could not create encoder: %s\n",
 139                                         dssdev->name);
 140                         return -ENOMEM;
 141                 }
 142
 143                 connector = omap_connector_init(dev,
 144                                 get_connector_type(dssdev), dssdev, encoder);
 145
 146                 if (!connector) {
 147                         dev_err(dev->dev, "could not create connector: %s\n",
 148                                         dssdev->name);
 149                         return -ENOMEM;
 150                 }
 151
 152                 BUG_ON(priv->num_encoders >= ARRAY_SIZE(priv->encoders));
 153                 BUG_ON(priv->num_connectors >= ARRAY_SIZE(priv->connectors));
 154
 155                 priv->encoders[priv->num_encoders++] = encoder;
 156                 priv->connectors[priv->num_connectors++] = connector;
 157
 158                 drm_mode_connector_attach_encoder(connector, encoder);
 159
 160                 /* figure out which crtc's we can connect the encoder to: */
 161                 encoder->possible_crtcs = 0;
 162                 for (id = 0; id < priv->num_crtcs; id++) {
 163                         enum omap_dss_output_id supported_outputs =
 164                                         dss_feat_get_supported_outputs(pipe2chan(id));
 165                         if (supported_outputs & dssdev->output->id)
 166                                 encoder->possible_crtcs |= (1 << id);
 167                 }
 168         }
 169
 170         dev->mode_config.min_width = 32;
 171         dev->mode_config.min_height = 32;
 172
 173         /* note: eventually will need some cpu_is_omapXYZ() type stuff here
 174          * to fill in these limits properly on different OMAP generations..
 175          */
 176         dev->mode_config.max_width = 2048;
 177         dev->mode_config.max_height = 2048;
 178
 179         dev->mode_config.funcs = &omap_mode_config_funcs;
 180
 181         return 0;
 182 }
 183
 184 static void omap_modeset_free(struct drm_device *dev)
 185 {
 186         drm_mode_config_cleanup(dev);
 187 }
 188
 189 /*
 190  * drm ioctl funcs
 191  */
 192
 193
 194 static int ioctl_get_param(struct drm_device *dev, void *data,
 195                 struct drm_file *file_priv)
 196 {
 197         struct omap_drm_private *priv = dev->dev_private;
 198         struct drm_omap_param *args = data;
 199
 200         DBG("%p: param=%llu", dev, args->param);
 201
 202         switch (args->param) {
 203         case OMAP_PARAM_CHIPSET_ID:
 204                 args->value = priv->omaprev;
 205                 break;
 206         default:
 207                 DBG("unknown parameter %lld", args->param);
 208                 return -EINVAL;
 209         }
 210
 211         return 0;
 212 }
 213
 214 static int ioctl_set_param(struct drm_device *dev, void *data,
 215                 struct drm_file *file_priv)
 216 {
 217         struct drm_omap_param *args = data;
 218
 219         switch (args->param) {
 220         default:
 221                 DBG("unknown parameter %lld", args->param);
 222                 return -EINVAL;
 223         }
 224
 225         return 0;
 226 }
 227
 228 static int ioctl_gem_new(struct drm_device *dev, void *data,
 229                 struct drm_file *file_priv)
 230 {
 231         struct drm_omap_gem_new *args = data;
 232         VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
 233                         args->size.bytes, args->flags);
 234         return omap_gem_new_handle(dev, file_priv, args->size,
 235                         args->flags, &args->handle);
 236 }
 237
 238 static int ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
 239                 struct drm_file *file_priv)
 240 {
 241         struct drm_omap_gem_cpu_prep *args = data;
 242         struct drm_gem_object *obj;
 243         int ret;
 244
 245         VERB("%p:%p: handle=%d, op=%x", dev, file_priv, args->handle, args->op);
 246
 247         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 248         if (!obj)
 249                 return -ENOENT;
 250
 251         ret = omap_gem_op_sync(obj, args->op);
 252
 253         if (!ret)
 254                 ret = omap_gem_op_start(obj, args->op);
 255
 256         drm_gem_object_unreference_unlocked(obj);
 257
 258         return ret;
 259 }
 260
 261 static int ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
 262                 struct drm_file *file_priv)
 263 {
 264         struct drm_omap_gem_cpu_fini *args = data;
 265         struct drm_gem_object *obj;
 266         int ret;
 267
 268         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 269
 270         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 271         if (!obj)
 272                 return -ENOENT;
 273
 274         /* XXX flushy, flushy */
 275         ret = 0;
 276
 277         if (!ret)
 278                 ret = omap_gem_op_finish(obj, args->op);
 279
 280         drm_gem_object_unreference_unlocked(obj);
 281
 282         return ret;
 283 }
 284
 285 static int ioctl_gem_info(struct drm_device *dev, void *data,
 286                 struct drm_file *file_priv)
 287 {
 288         struct drm_omap_gem_info *args = data;
 289         struct drm_gem_object *obj;
 290         int ret = 0;
 291
 292         VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
 293
 294         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
 295         if (!obj)
 296                 return -ENOENT;
 297
 298         args->size = omap_gem_mmap_size(obj);
 299         args->offset = omap_gem_mmap_offset(obj);
 300
 301         drm_gem_object_unreference_unlocked(obj);
 302
 303         return ret;
 304 }
 305
 306 struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
 307         DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param, DRM_UNLOCKED|DRM_AUTH),
 308         DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param, DRM_UNLOCKED|DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 309         DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_UNLOCKED|DRM_AUTH),
 310         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, ioctl_gem_cpu_prep, DRM_UNLOCKED|DRM_AUTH),
 311         DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, ioctl_gem_cpu_fini, DRM_UNLOCKED|DRM_AUTH),
 312         DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_UNLOCKED|DRM_AUTH),
 313 };
 314
 315 /*
 316  * drm driver funcs
 317  */
 318
 319 /**
 320  * load - setup chip and create an initial config
 321  * @dev: DRM device
 322  * @flags: startup flags
 323  *
 324  * The driver load routine has to do several things:
 325  *   - initialize the memory manager
 326  *   - allocate initial config memory
 327  *   - setup the DRM framebuffer with the allocated memory
 328  */
 329 static int dev_load(struct drm_device *dev, unsigned long flags)
 330 {
 331         struct omap_drm_platform_data *pdata = dev->dev->platform_data;
 332         struct omap_drm_private *priv;
 333         int ret;
 334
 335         DBG("load: dev=%p", dev);
 336
 337         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 338         if (!priv)
 339                 return -ENOMEM;
 340
 341         priv->omaprev = pdata->omaprev;
 342
 343         dev->dev_private = priv;
 344
 345         priv->wq = alloc_ordered_workqueue("omapdrm", 0);
 346
 347         INIT_LIST_HEAD(&priv->obj_list);
 348
 349         omap_gem_init(dev);
 350
 351         ret = omap_modeset_init(dev);
 352         if (ret) {
 353                 dev_err(dev->dev, "omap_modeset_init failed: ret=%d\n", ret);
 354                 dev->dev_private = NULL;
 355                 kfree(priv);
 356                 return ret;
 357         }
 358
 359         ret = drm_vblank_init(dev, priv->num_crtcs);
 360         if (ret)
 361                 dev_warn(dev->dev, "could not init vblank\n");
 362
 363         priv->fbdev = omap_fbdev_init(dev);
 364         if (!priv->fbdev) {
 365                 dev_warn(dev->dev, "omap_fbdev_init failed\n");
 366                 /* well, limp along without an fbdev.. maybe X11 will work? */
 367         }
 368
 369         /* store off drm_device for use in pm ops */
 370         dev_set_drvdata(dev->dev, dev);
 371
 372         drm_kms_helper_poll_init(dev);
 373
 374         return 0;
 375 }
 376
 377 static int dev_unload(struct drm_device *dev)
 378 {
 379         struct omap_drm_private *priv = dev->dev_private;
 380
 381         DBG("unload: dev=%p", dev);
 382
 383         drm_kms_helper_poll_fini(dev);
 384         drm_vblank_cleanup(dev);
 385         omap_drm_irq_uninstall(dev);
 386
 387         omap_fbdev_free(dev);
 388         omap_modeset_free(dev);
 389         omap_gem_deinit(dev);
 390
 391         flush_workqueue(priv->wq);
 392         destroy_workqueue(priv->wq);
 393
 394         kfree(dev->dev_private);
 395         dev->dev_private = NULL;
 396
 397         dev_set_drvdata(dev->dev, NULL);
 398
 399         return 0;
 400 }
 401
 402 static int dev_open(struct drm_device *dev, struct drm_file *file)
 403 {
 404         file->driver_priv = NULL;
 405
 406         DBG("open: dev=%p, file=%p", dev, file);
 407
 408         return 0;
 409 }
 410
 411 static int dev_firstopen(struct drm_device *dev)
 412 {
 413         DBG("firstopen: dev=%p", dev);
 414         return 0;
 415 }
 416
 417 /**
 418  * lastclose - clean up after all DRM clients have exited
 419  * @dev: DRM device
 420  *
 421  * Take care of cleaning up after all DRM clients have exited.  In the
 422  * mode setting case, we want to restore the kernel's initial mode (just
 423  * in case the last client left us in a bad state).
 424  */
 425 static void dev_lastclose(struct drm_device *dev)
 426 {
 427         int i;
 428
 429         /* we don't support vga-switcheroo.. so just make sure the fbdev
 430          * mode is active
 431          */
 432         struct omap_drm_private *priv = dev->dev_private;
 433         int ret;
 434
 435         DBG("lastclose: dev=%p", dev);
 436
 437         if (priv->rotation_prop) {
 438                 /* need to restore default rotation state.. not sure
 439                  * if there is a cleaner way to restore properties to
 440                  * default state?  Maybe a flag that properties should
 441                  * automatically be restored to default state on
 442                  * lastclose?
 443                  */
 444                 for (i = 0; i < priv->num_crtcs; i++) {
 445                         drm_object_property_set_value(&priv->crtcs[i]->base,
 446                                         priv->rotation_prop, 0);
 447                 }
 448
 449                 for (i = 0; i < priv->num_planes; i++) {
 450                         drm_object_property_set_value(&priv->planes[i]->base,
 451                                         priv->rotation_prop, 0);
 452                 }
 453         }
 454
 455         drm_modeset_lock_all(dev);
 456         ret = drm_fb_helper_restore_fbdev_mode(priv->fbdev);
 457         drm_modeset_unlock_all(dev);
 458         if (ret)
 459                 DBG("failed to restore crtc mode");
 460 }
 461
 462 static void dev_preclose(struct drm_device *dev, struct drm_file *file)
 463 {
 464         DBG("preclose: dev=%p", dev);
 465 }
 466
 467 static void dev_postclose(struct drm_device *dev, struct drm_file *file)
 468 {
 469         DBG("postclose: dev=%p, file=%p", dev, file);
 470 }
 471
 472 static const struct vm_operations_struct omap_gem_vm_ops = {
 473         .fault = omap_gem_fault,
 474         .open = drm_gem_vm_open,
 475         .close = drm_gem_vm_close,
 476 };
 477
 478 static const struct file_operations omapdriver_fops = {
 479                 .owner = THIS_MODULE,
 480                 .open = drm_open,
 481                 .unlocked_ioctl = drm_ioctl,
 482                 .release = drm_release,
 483                 .mmap = omap_gem_mmap,
 484                 .poll = drm_poll,
 485                 .fasync = drm_fasync,
 486                 .read = drm_read,
 487                 .llseek = noop_llseek,
 488 };
 489
 490 static struct drm_driver omap_drm_driver = {
 491                 .driver_features =
 492                                 DRIVER_HAVE_IRQ | DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 493                 .load = dev_load,
 494                 .unload = dev_unload,
 495                 .open = dev_open,
 496                 .firstopen = dev_firstopen,
 497                 .lastclose = dev_lastclose,
 498                 .preclose = dev_preclose,
 499                 .postclose = dev_postclose,
 500                 .get_vblank_counter = drm_vblank_count,
 501                 .enable_vblank = omap_irq_enable_vblank,
 502                 .disable_vblank = omap_irq_disable_vblank,
 503                 .irq_preinstall = omap_irq_preinstall,
 504                 .irq_postinstall = omap_irq_postinstall,
 505                 .irq_uninstall = omap_irq_uninstall,
 506                 .irq_handler = omap_irq_handler,
 507 #ifdef CONFIG_DEBUG_FS
 508                 .debugfs_init = omap_debugfs_init,
 509                 .debugfs_cleanup = omap_debugfs_cleanup,
 510 #endif
 511                 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 512                 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 513                 .gem_prime_export = omap_gem_prime_export,
 514                 .gem_prime_import = omap_gem_prime_import,
 515                 .gem_init_object = omap_gem_init_object,
 516                 .gem_free_object = omap_gem_free_object,
 517                 .gem_vm_ops = &omap_gem_vm_ops,
 518                 .dumb_create = omap_gem_dumb_create,
 519                 .dumb_map_offset = omap_gem_dumb_map_offset,
 520                 .dumb_destroy = omap_gem_dumb_destroy,
 521                 .ioctls = ioctls,
 522                 .num_ioctls = DRM_OMAP_NUM_IOCTLS,
 523                 .fops = &omapdriver_fops,
 524                 .name = DRIVER_NAME,
 525                 .desc = DRIVER_DESC,
 526                 .date = DRIVER_DATE,
 527                 .major = DRIVER_MAJOR,
 528                 .minor = DRIVER_MINOR,
 529                 .patchlevel = DRIVER_PATCHLEVEL,
 530 };
 531
 532 static int pdev_suspend(struct platform_device *pDevice, pm_message_t state)
 533 {
 534         DBG("");
 535         return 0;
 536 }
 537
 538 static int pdev_resume(struct platform_device *device)
 539 {
 540         DBG("");
 541         return 0;
 542 }
 543
 544 static void pdev_shutdown(struct platform_device *device)
 545 {
 546         DBG("");
 547 }
 548
 549 static int pdev_probe(struct platform_device *device)
 550 {
 551         if (omapdss_is_initialized() == false)
 552                 return -EPROBE_DEFER;
 553
 554         DBG("%s", device->name);
 555         return drm_platform_init(&omap_drm_driver, device);
 556 }
 557
 558 static int pdev_remove(struct platform_device *device)
 559 {
 560         DBG("");
 561         drm_platform_exit(&omap_drm_driver, device);
 562
 563         platform_driver_unregister(&omap_dmm_driver);
 564         return 0;
 565 }
 566
 567 #ifdef CONFIG_PM
 568 static const struct dev_pm_ops omapdrm_pm_ops = {
 569         .resume = omap_gem_resume,
 570 };
 571 #endif
 572
 573 struct platform_driver pdev = {
 574                 .driver = {
 575                         .name = DRIVER_NAME,
 576                         .owner = THIS_MODULE,
 577 #ifdef CONFIG_PM
 578                         .pm = &omapdrm_pm_ops,
 579 #endif
 580                 },
 581                 .probe = pdev_probe,
 582                 .remove = pdev_remove,
 583                 .suspend = pdev_suspend,
 584                 .resume = pdev_resume,
 585                 .shutdown = pdev_shutdown,
 586 };
 587
 588 static int __init omap_drm_init(void)
 589 {
 590         DBG("init");
 591         if (platform_driver_register(&omap_dmm_driver)) {
 592                 /* we can continue on without DMM.. so not fatal */
 593                 dev_err(NULL, "DMM registration failed\n");
 594         }
 595         return platform_driver_register(&pdev);
 596 }
 597
 598 static void __exit omap_drm_fini(void)
 599 {
 600         DBG("fini");
 601         platform_driver_unregister(&pdev);
 602 }
 603
 604 /* need late_initcall() so we load after dss_driver's are loaded */
 605 late_initcall(omap_drm_init);
 606 module_exit(omap_drm_fini);
 607
 608 MODULE_AUTHOR("Rob Clark <rob@ti.com>");
 609 MODULE_DESCRIPTION("OMAP DRM Display Driver");
 610 MODULE_ALIAS("platform:" DRIVER_NAME);
 611 MODULE_LICENSE("GPL v2");