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