drivers/gpu/drm/exynos/exynos_drm_drv.c

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   3  * Authors:
   4  *      Inki Dae <inki.dae@samsung.com>
   5  *      Joonyoung Shim <jy0922.shim@samsung.com>
   6  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/pm_runtime.h>
  15 #include <drm/drmP.h>
  16 #include <drm/drm_atomic.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_crtc_helper.h>
  19
  20 #include <linux/component.h>
  21
  22 #include <drm/exynos_drm.h>
  23
  24 #include "exynos_drm_drv.h"
  25 #include "exynos_drm_fbdev.h"
  26 #include "exynos_drm_fb.h"
  27 #include "exynos_drm_gem.h"
  28 #include "exynos_drm_plane.h"
  29 #include "exynos_drm_vidi.h"
  30 #include "exynos_drm_g2d.h"
  31 #include "exynos_drm_ipp.h"
  32 #include "exynos_drm_iommu.h"
  33
  34 #define DRIVER_NAME     "exynos"
  35 #define DRIVER_DESC     "Samsung SoC DRM"
  36 #define DRIVER_DATE     "20110530"
  37 #define DRIVER_MAJOR    1
  38 #define DRIVER_MINOR    0
  39
  40 static struct device *exynos_drm_get_dma_device(void);
  41
  42 int exynos_atomic_check(struct drm_device *dev,
  43                         struct drm_atomic_state *state)
  44 {
  45         int ret;
  46
  47         ret = drm_atomic_helper_check_modeset(dev, state);
  48         if (ret)
  49                 return ret;
  50
  51         ret = drm_atomic_normalize_zpos(dev, state);
  52         if (ret)
  53                 return ret;
  54
  55         ret = drm_atomic_helper_check_planes(dev, state);
  56         if (ret)
  57                 return ret;
  58
  59         return ret;
  60 }
  61
  62 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  63 {
  64         struct drm_exynos_file_private *file_priv;
  65         int ret;
  66
  67         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  68         if (!file_priv)
  69                 return -ENOMEM;
  70
  71         file->driver_priv = file_priv;
  72
  73         ret = exynos_drm_subdrv_open(dev, file);
  74         if (ret)
  75                 goto err_file_priv_free;
  76
  77         return ret;
  78
  79 err_file_priv_free:
  80         kfree(file_priv);
  81         file->driver_priv = NULL;
  82         return ret;
  83 }
  84
  85 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  86 {
  87         exynos_drm_subdrv_close(dev, file);
  88         kfree(file->driver_priv);
  89         file->driver_priv = NULL;
  90 }
  91
  92 static void exynos_drm_lastclose(struct drm_device *dev)
  93 {
  94         exynos_drm_fbdev_restore_mode(dev);
  95 }
  96
  97 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  98         .fault = exynos_drm_gem_fault,
  99         .open = drm_gem_vm_open,
 100         .close = drm_gem_vm_close,
 101 };
 102
 103 static const struct drm_ioctl_desc exynos_ioctls[] = {
 104         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 105                         DRM_AUTH | DRM_RENDER_ALLOW),
 106         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
 107                         DRM_AUTH | DRM_RENDER_ALLOW),
 108         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
 109                         DRM_RENDER_ALLOW),
 110         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
 111                         DRM_AUTH),
 112         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
 113                         DRM_AUTH | DRM_RENDER_ALLOW),
 114         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
 115                         DRM_AUTH | DRM_RENDER_ALLOW),
 116         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
 117                         DRM_AUTH | DRM_RENDER_ALLOW),
 118         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property,
 119                         DRM_AUTH | DRM_RENDER_ALLOW),
 120         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property,
 121                         DRM_AUTH | DRM_RENDER_ALLOW),
 122         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf,
 123                         DRM_AUTH | DRM_RENDER_ALLOW),
 124         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl,
 125                         DRM_AUTH | DRM_RENDER_ALLOW),
 126 };
 127
 128 static const struct file_operations exynos_drm_driver_fops = {
 129         .owner          = THIS_MODULE,
 130         .open           = drm_open,
 131         .mmap           = exynos_drm_gem_mmap,
 132         .poll           = drm_poll,
 133         .read           = drm_read,
 134         .unlocked_ioctl = drm_ioctl,
 135         .compat_ioctl = drm_compat_ioctl,
 136         .release        = drm_release,
 137 };
 138
 139 static struct drm_driver exynos_drm_driver = {
 140         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 141                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 142         .open                   = exynos_drm_open,
 143         .lastclose              = exynos_drm_lastclose,
 144         .postclose              = exynos_drm_postclose,
 145         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 146         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 147         .dumb_create            = exynos_drm_gem_dumb_create,
 148         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 149         .dumb_destroy           = drm_gem_dumb_destroy,
 150         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 151         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 152         .gem_prime_export       = drm_gem_prime_export,
 153         .gem_prime_import       = drm_gem_prime_import,
 154         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 155         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 156         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 157         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 158         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 159         .ioctls                 = exynos_ioctls,
 160         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 161         .fops                   = &exynos_drm_driver_fops,
 162         .name   = DRIVER_NAME,
 163         .desc   = DRIVER_DESC,
 164         .date   = DRIVER_DATE,
 165         .major  = DRIVER_MAJOR,
 166         .minor  = DRIVER_MINOR,
 167 };
 168
 169 #ifdef CONFIG_PM_SLEEP
 170 static int exynos_drm_suspend(struct device *dev)
 171 {
 172         struct drm_device *drm_dev = dev_get_drvdata(dev);
 173         struct drm_connector *connector;
 174         struct drm_connector_list_iter conn_iter;
 175
 176         if (pm_runtime_suspended(dev) || !drm_dev)
 177                 return 0;
 178
 179         drm_connector_list_iter_begin(drm_dev, &conn_iter);
 180         drm_for_each_connector_iter(connector, &conn_iter) {
 181                 int old_dpms = connector->dpms;
 182
 183                 if (connector->funcs->dpms)
 184                         connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
 185
 186                 /* Set the old mode back to the connector for resume */
 187                 connector->dpms = old_dpms;
 188         }
 189         drm_connector_list_iter_end(&conn_iter);
 190
 191         return 0;
 192 }
 193
 194 static int exynos_drm_resume(struct device *dev)
 195 {
 196         struct drm_device *drm_dev = dev_get_drvdata(dev);
 197         struct drm_connector *connector;
 198         struct drm_connector_list_iter conn_iter;
 199
 200         if (pm_runtime_suspended(dev) || !drm_dev)
 201                 return 0;
 202
 203         drm_connector_list_iter_begin(drm_dev, &conn_iter);
 204         drm_for_each_connector_iter(connector, &conn_iter) {
 205                 if (connector->funcs->dpms) {
 206                         int dpms = connector->dpms;
 207
 208                         connector->dpms = DRM_MODE_DPMS_OFF;
 209                         connector->funcs->dpms(connector, dpms);
 210                 }
 211         }
 212         drm_connector_list_iter_end(&conn_iter);
 213
 214         return 0;
 215 }
 216 #endif
 217
 218 static const struct dev_pm_ops exynos_drm_pm_ops = {
 219         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 220 };
 221
 222 /* forward declaration */
 223 static struct platform_driver exynos_drm_platform_driver;
 224
 225 struct exynos_drm_driver_info {
 226         struct platform_driver *driver;
 227         unsigned int flags;
 228 };
 229
 230 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 231 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 232 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 233
 234 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 235
 236 /*
 237  * Connector drivers should not be placed before associated crtc drivers,
 238  * because connector requires pipe number of its crtc during initialization.
 239  */
 240 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 241         {
 242                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 243                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 244         }, {
 245                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 246                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 247         }, {
 248                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 249                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 250         }, {
 251                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 252                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 253         }, {
 254                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 255                 DRM_COMPONENT_DRIVER
 256         }, {
 257                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 258                 DRM_COMPONENT_DRIVER
 259         }, {
 260                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 261                 DRM_COMPONENT_DRIVER
 262         }, {
 263                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 264                 DRM_COMPONENT_DRIVER
 265         }, {
 266                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 267                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 268         }, {
 269                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 270         }, {
 271                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 272         }, {
 273                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 274         }, {
 275                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 276         }, {
 277                 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP),
 278                 DRM_VIRTUAL_DEVICE
 279         }, {
 280                 &exynos_drm_platform_driver,
 281                 DRM_VIRTUAL_DEVICE
 282         }
 283 };
 284
 285 static int compare_dev(struct device *dev, void *data)
 286 {
 287         return dev == (struct device *)data;
 288 }
 289
 290 static struct component_match *exynos_drm_match_add(struct device *dev)
 291 {
 292         struct component_match *match = NULL;
 293         int i;
 294
 295         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 296                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 297                 struct device *p = NULL, *d;
 298
 299                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 300                         continue;
 301
 302                 while ((d = bus_find_device(&platform_bus_type, p,
 303                                             &info->driver->driver,
 304                                             (void *)platform_bus_type.match))) {
 305                         put_device(p);
 306                         component_match_add(dev, &match, compare_dev, d);
 307                         p = d;
 308                 }
 309                 put_device(p);
 310         }
 311
 312         return match ?: ERR_PTR(-ENODEV);
 313 }
 314
 315 static int exynos_drm_bind(struct device *dev)
 316 {
 317         struct exynos_drm_private *private;
 318         struct drm_encoder *encoder;
 319         struct drm_device *drm;
 320         unsigned int clone_mask;
 321         int cnt, ret;
 322
 323         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 324         if (IS_ERR(drm))
 325                 return PTR_ERR(drm);
 326
 327         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 328         if (!private) {
 329                 ret = -ENOMEM;
 330                 goto err_free_drm;
 331         }
 332
 333         init_waitqueue_head(&private->wait);
 334         spin_lock_init(&private->lock);
 335
 336         dev_set_drvdata(dev, drm);
 337         drm->dev_private = (void *)private;
 338
 339         /* the first real CRTC device is used for all dma mapping operations */
 340         private->dma_dev = exynos_drm_get_dma_device();
 341         if (!private->dma_dev) {
 342                 DRM_ERROR("no device found for DMA mapping operations.\n");
 343                 ret = -ENODEV;
 344                 goto err_free_private;
 345         }
 346         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 347                  dev_name(private->dma_dev));
 348
 349         /* create common IOMMU mapping for all devices attached to Exynos DRM */
 350         ret = drm_create_iommu_mapping(drm);
 351         if (ret < 0) {
 352                 DRM_ERROR("failed to create iommu mapping.\n");
 353                 goto err_free_private;
 354         }
 355
 356         drm_mode_config_init(drm);
 357
 358         exynos_drm_mode_config_init(drm);
 359
 360         /* setup possible_clones. */
 361         cnt = 0;
 362         clone_mask = 0;
 363         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 364                 clone_mask |= (1 << (cnt++));
 365
 366         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 367                 encoder->possible_clones = clone_mask;
 368
 369         /* Try to bind all sub drivers. */
 370         ret = component_bind_all(drm->dev, drm);
 371         if (ret)
 372                 goto err_mode_config_cleanup;
 373
 374         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 375         if (ret)
 376                 goto err_unbind_all;
 377
 378         /* Probe non kms sub drivers and virtual display driver. */
 379         ret = exynos_drm_device_subdrv_probe(drm);
 380         if (ret)
 381                 goto err_unbind_all;
 382
 383         drm_mode_config_reset(drm);
 384
 385         /*
 386          * enable drm irq mode.
 387          * - with irq_enabled = true, we can use the vblank feature.
 388          *
 389          * P.S. note that we wouldn't use drm irq handler but
 390          *      just specific driver own one instead because
 391          *      drm framework supports only one irq handler.
 392          */
 393         drm->irq_enabled = true;
 394
 395         /* init kms poll for handling hpd */
 396         drm_kms_helper_poll_init(drm);
 397
 398         /* force connectors detection */
 399         drm_helper_hpd_irq_event(drm);
 400
 401         /* register the DRM device */
 402         ret = drm_dev_register(drm, 0);
 403         if (ret < 0)
 404                 goto err_cleanup_fbdev;
 405
 406         return 0;
 407
 408 err_cleanup_fbdev:
 409         exynos_drm_fbdev_fini(drm);
 410         drm_kms_helper_poll_fini(drm);
 411         exynos_drm_device_subdrv_remove(drm);
 412 err_unbind_all:
 413         component_unbind_all(drm->dev, drm);
 414 err_mode_config_cleanup:
 415         drm_mode_config_cleanup(drm);
 416         drm_release_iommu_mapping(drm);
 417 err_free_private:
 418         kfree(private);
 419 err_free_drm:
 420         drm_dev_unref(drm);
 421
 422         return ret;
 423 }
 424
 425 static void exynos_drm_unbind(struct device *dev)
 426 {
 427         struct drm_device *drm = dev_get_drvdata(dev);
 428
 429         drm_dev_unregister(drm);
 430
 431         exynos_drm_device_subdrv_remove(drm);
 432
 433         exynos_drm_fbdev_fini(drm);
 434         drm_kms_helper_poll_fini(drm);
 435
 436         component_unbind_all(drm->dev, drm);
 437         drm_mode_config_cleanup(drm);
 438         drm_release_iommu_mapping(drm);
 439
 440         kfree(drm->dev_private);
 441         drm->dev_private = NULL;
 442
 443         drm_dev_unref(drm);
 444 }
 445
 446 static const struct component_master_ops exynos_drm_ops = {
 447         .bind           = exynos_drm_bind,
 448         .unbind         = exynos_drm_unbind,
 449 };
 450
 451 static int exynos_drm_platform_probe(struct platform_device *pdev)
 452 {
 453         struct component_match *match;
 454
 455         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 456
 457         match = exynos_drm_match_add(&pdev->dev);
 458         if (IS_ERR(match))
 459                 return PTR_ERR(match);
 460
 461         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 462                                                match);
 463 }
 464
 465 static int exynos_drm_platform_remove(struct platform_device *pdev)
 466 {
 467         component_master_del(&pdev->dev, &exynos_drm_ops);
 468         return 0;
 469 }
 470
 471 static struct platform_driver exynos_drm_platform_driver = {
 472         .probe  = exynos_drm_platform_probe,
 473         .remove = exynos_drm_platform_remove,
 474         .driver = {
 475                 .name   = "exynos-drm",
 476                 .pm     = &exynos_drm_pm_ops,
 477         },
 478 };
 479
 480 static struct device *exynos_drm_get_dma_device(void)
 481 {
 482         int i;
 483
 484         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 485                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 486                 struct device *dev;
 487
 488                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 489                         continue;
 490
 491                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 492                                             &info->driver->driver,
 493                                             (void *)platform_bus_type.match))) {
 494                         put_device(dev);
 495                         return dev;
 496                 }
 497         }
 498         return NULL;
 499 }
 500
 501 static void exynos_drm_unregister_devices(void)
 502 {
 503         int i;
 504
 505         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 506                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 507                 struct device *dev;
 508
 509                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 510                         continue;
 511
 512                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 513                                             &info->driver->driver,
 514                                             (void *)platform_bus_type.match))) {
 515                         put_device(dev);
 516                         platform_device_unregister(to_platform_device(dev));
 517                 }
 518         }
 519 }
 520
 521 static int exynos_drm_register_devices(void)
 522 {
 523         struct platform_device *pdev;
 524         int i;
 525
 526         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 527                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 528
 529                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 530                         continue;
 531
 532                 pdev = platform_device_register_simple(
 533                                         info->driver->driver.name, -1, NULL, 0);
 534                 if (IS_ERR(pdev))
 535                         goto fail;
 536         }
 537
 538         return 0;
 539 fail:
 540         exynos_drm_unregister_devices();
 541         return PTR_ERR(pdev);
 542 }
 543
 544 static void exynos_drm_unregister_drivers(void)
 545 {
 546         int i;
 547
 548         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 549                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 550
 551                 if (!info->driver)
 552                         continue;
 553
 554                 platform_driver_unregister(info->driver);
 555         }
 556 }
 557
 558 static int exynos_drm_register_drivers(void)
 559 {
 560         int i, ret;
 561
 562         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 563                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 564
 565                 if (!info->driver)
 566                         continue;
 567
 568                 ret = platform_driver_register(info->driver);
 569                 if (ret)
 570                         goto fail;
 571         }
 572         return 0;
 573 fail:
 574         exynos_drm_unregister_drivers();
 575         return ret;
 576 }
 577
 578 static int exynos_drm_init(void)
 579 {
 580         int ret;
 581
 582         ret = exynos_drm_register_devices();
 583         if (ret)
 584                 return ret;
 585
 586         ret = exynos_drm_register_drivers();
 587         if (ret)
 588                 goto err_unregister_pdevs;
 589
 590         return 0;
 591
 592 err_unregister_pdevs:
 593         exynos_drm_unregister_devices();
 594
 595         return ret;
 596 }
 597
 598 static void exynos_drm_exit(void)
 599 {
 600         exynos_drm_unregister_drivers();
 601         exynos_drm_unregister_devices();
 602 }
 603
 604 module_init(exynos_drm_init);
 605 module_exit(exynos_drm_exit);
 606
 607 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 608 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 609 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 610 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 611 MODULE_LICENSE("GPL");