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 #include <drm/drm_fb_helper.h>
  20
  21 #include <linux/component.h>
  22
  23 #include <drm/exynos_drm.h>
  24
  25 #include "exynos_drm_drv.h"
  26 #include "exynos_drm_fbdev.h"
  27 #include "exynos_drm_fb.h"
  28 #include "exynos_drm_gem.h"
  29 #include "exynos_drm_plane.h"
  30 #include "exynos_drm_ipp.h"
  31 #include "exynos_drm_vidi.h"
  32 #include "exynos_drm_g2d.h"
  33 #include "exynos_drm_iommu.h"
  34
  35 #define DRIVER_NAME     "exynos"
  36 #define DRIVER_DESC     "Samsung SoC DRM"
  37 #define DRIVER_DATE     "20180330"
  38
  39 /*
  40  * Interface history:
  41  *
  42  * 1.0 - Original version
  43  * 1.1 - Upgrade IPP driver to version 2.0
  44  */
  45 #define DRIVER_MAJOR    1
  46 #define DRIVER_MINOR    1
  47
  48 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  49 {
  50         struct drm_exynos_file_private *file_priv;
  51         int ret;
  52
  53         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  54         if (!file_priv)
  55                 return -ENOMEM;
  56
  57         file->driver_priv = file_priv;
  58         ret = g2d_open(dev, file);
  59         if (ret)
  60                 goto err_file_priv_free;
  61
  62         return ret;
  63
  64 err_file_priv_free:
  65         kfree(file_priv);
  66         file->driver_priv = NULL;
  67         return ret;
  68 }
  69
  70 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  71 {
  72         g2d_close(dev, file);
  73         kfree(file->driver_priv);
  74         file->driver_priv = NULL;
  75 }
  76
  77 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  78         .fault = exynos_drm_gem_fault,
  79         .open = drm_gem_vm_open,
  80         .close = drm_gem_vm_close,
  81 };
  82
  83 static const struct drm_ioctl_desc exynos_ioctls[] = {
  84         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
  85                         DRM_AUTH | DRM_RENDER_ALLOW),
  86         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
  87                         DRM_AUTH | DRM_RENDER_ALLOW),
  88         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
  89                         DRM_RENDER_ALLOW),
  90         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
  91                         DRM_AUTH),
  92         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
  93                         DRM_AUTH | DRM_RENDER_ALLOW),
  94         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
  95                         DRM_AUTH | DRM_RENDER_ALLOW),
  96         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
  97                         DRM_AUTH | DRM_RENDER_ALLOW),
  98         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
  99                         exynos_drm_ipp_get_res_ioctl,
 100                         DRM_AUTH | DRM_RENDER_ALLOW),
 101         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
 102                         DRM_AUTH | DRM_RENDER_ALLOW),
 103         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
 104                         exynos_drm_ipp_get_limits_ioctl,
 105                         DRM_AUTH | DRM_RENDER_ALLOW),
 106         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 107                         DRM_AUTH | DRM_RENDER_ALLOW),
 108 };
 109
 110 static const struct file_operations exynos_drm_driver_fops = {
 111         .owner          = THIS_MODULE,
 112         .open           = drm_open,
 113         .mmap           = exynos_drm_gem_mmap,
 114         .poll           = drm_poll,
 115         .read           = drm_read,
 116         .unlocked_ioctl = drm_ioctl,
 117         .compat_ioctl = drm_compat_ioctl,
 118         .release        = drm_release,
 119 };
 120
 121 static struct drm_driver exynos_drm_driver = {
 122         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 123                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 124         .open                   = exynos_drm_open,
 125         .lastclose              = drm_fb_helper_lastclose,
 126         .postclose              = exynos_drm_postclose,
 127         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 128         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 129         .dumb_create            = exynos_drm_gem_dumb_create,
 130         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 131         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 132         .gem_prime_export       = drm_gem_prime_export,
 133         .gem_prime_import       = exynos_drm_gem_prime_import,
 134         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 135         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 136         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 137         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 138         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 139         .ioctls                 = exynos_ioctls,
 140         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 141         .fops                   = &exynos_drm_driver_fops,
 142         .name   = DRIVER_NAME,
 143         .desc   = DRIVER_DESC,
 144         .date   = DRIVER_DATE,
 145         .major  = DRIVER_MAJOR,
 146         .minor  = DRIVER_MINOR,
 147 };
 148
 149 static int exynos_drm_suspend(struct device *dev)
 150 {
 151         struct drm_device *drm_dev = dev_get_drvdata(dev);
 152
 153         return  drm_mode_config_helper_suspend(drm_dev);
 154 }
 155
 156 static void exynos_drm_resume(struct device *dev)
 157 {
 158         struct drm_device *drm_dev = dev_get_drvdata(dev);
 159
 160         drm_mode_config_helper_resume(drm_dev);
 161 }
 162
 163 static const struct dev_pm_ops exynos_drm_pm_ops = {
 164         .prepare = exynos_drm_suspend,
 165         .complete = exynos_drm_resume,
 166 };
 167
 168 /* forward declaration */
 169 static struct platform_driver exynos_drm_platform_driver;
 170
 171 struct exynos_drm_driver_info {
 172         struct platform_driver *driver;
 173         unsigned int flags;
 174 };
 175
 176 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 177 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 178 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 179 #define DRM_FIMC_DEVICE         BIT(3)  /* devices shared with V4L2 subsystem */
 180
 181 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 182
 183 /*
 184  * Connector drivers should not be placed before associated crtc drivers,
 185  * because connector requires pipe number of its crtc during initialization.
 186  */
 187 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 188         {
 189                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 190                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 191         }, {
 192                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 193                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 194         }, {
 195                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 196                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 197         }, {
 198                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 199                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 200         }, {
 201                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 202                 DRM_COMPONENT_DRIVER
 203         }, {
 204                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 205                 DRM_COMPONENT_DRIVER
 206         }, {
 207                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 208                 DRM_COMPONENT_DRIVER
 209         }, {
 210                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 211                 DRM_COMPONENT_DRIVER
 212         }, {
 213                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 214                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 215         }, {
 216                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 217                 DRM_COMPONENT_DRIVER
 218         }, {
 219                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 220                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 221         }, {
 222                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 223                 DRM_COMPONENT_DRIVER
 224         }, {
 225                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 226                 DRM_COMPONENT_DRIVER
 227         }, {
 228                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 229                 DRM_COMPONENT_DRIVER
 230         }, {
 231                 &exynos_drm_platform_driver,
 232                 DRM_VIRTUAL_DEVICE
 233         }
 234 };
 235
 236 static int compare_dev(struct device *dev, void *data)
 237 {
 238         return dev == (struct device *)data;
 239 }
 240
 241 static struct component_match *exynos_drm_match_add(struct device *dev)
 242 {
 243         struct component_match *match = NULL;
 244         int i;
 245
 246         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 247                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 248                 struct device *p = NULL, *d;
 249
 250                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 251                         continue;
 252
 253                 while ((d = bus_find_device(&platform_bus_type, p,
 254                                             &info->driver->driver,
 255                                             (void *)platform_bus_type.match))) {
 256                         put_device(p);
 257
 258                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 259                             exynos_drm_check_fimc_device(d) == 0)
 260                                 component_match_add(dev, &match,
 261                                                     compare_dev, d);
 262                         p = d;
 263                 }
 264                 put_device(p);
 265         }
 266
 267         return match ?: ERR_PTR(-ENODEV);
 268 }
 269
 270 static struct device *exynos_drm_get_dma_device(void)
 271 {
 272         int i;
 273
 274         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 275                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 276                 struct device *dev;
 277
 278                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 279                         continue;
 280
 281                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 282                                             &info->driver->driver,
 283                                             (void *)platform_bus_type.match))) {
 284                         put_device(dev);
 285                         return dev;
 286                 }
 287         }
 288         return NULL;
 289 }
 290
 291 static int exynos_drm_bind(struct device *dev)
 292 {
 293         struct exynos_drm_private *private;
 294         struct drm_encoder *encoder;
 295         struct drm_device *drm;
 296         unsigned int clone_mask;
 297         int cnt, ret;
 298
 299         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 300         if (IS_ERR(drm))
 301                 return PTR_ERR(drm);
 302
 303         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 304         if (!private) {
 305                 ret = -ENOMEM;
 306                 goto err_free_drm;
 307         }
 308
 309         init_waitqueue_head(&private->wait);
 310         spin_lock_init(&private->lock);
 311
 312         dev_set_drvdata(dev, drm);
 313         drm->dev_private = (void *)private;
 314
 315         /* the first real CRTC device is used for all dma mapping operations */
 316         private->dma_dev = exynos_drm_get_dma_device();
 317         if (!private->dma_dev) {
 318                 DRM_ERROR("no device found for DMA mapping operations.\n");
 319                 ret = -ENODEV;
 320                 goto err_free_private;
 321         }
 322         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 323                  dev_name(private->dma_dev));
 324
 325         /* create common IOMMU mapping for all devices attached to Exynos DRM */
 326         ret = drm_create_iommu_mapping(drm);
 327         if (ret < 0) {
 328                 DRM_ERROR("failed to create iommu mapping.\n");
 329                 goto err_free_private;
 330         }
 331
 332         drm_mode_config_init(drm);
 333
 334         exynos_drm_mode_config_init(drm);
 335
 336         /* setup possible_clones. */
 337         cnt = 0;
 338         clone_mask = 0;
 339         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 340                 clone_mask |= (1 << (cnt++));
 341
 342         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 343                 encoder->possible_clones = clone_mask;
 344
 345         /* Try to bind all sub drivers. */
 346         ret = component_bind_all(drm->dev, drm);
 347         if (ret)
 348                 goto err_mode_config_cleanup;
 349
 350         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 351         if (ret)
 352                 goto err_unbind_all;
 353
 354         drm_mode_config_reset(drm);
 355
 356         /*
 357          * enable drm irq mode.
 358          * - with irq_enabled = true, we can use the vblank feature.
 359          *
 360          * P.S. note that we wouldn't use drm irq handler but
 361          *      just specific driver own one instead because
 362          *      drm framework supports only one irq handler.
 363          */
 364         drm->irq_enabled = true;
 365
 366         /* init kms poll for handling hpd */
 367         drm_kms_helper_poll_init(drm);
 368
 369         ret = exynos_drm_fbdev_init(drm);
 370         if (ret)
 371                 goto err_cleanup_poll;
 372
 373         /* register the DRM device */
 374         ret = drm_dev_register(drm, 0);
 375         if (ret < 0)
 376                 goto err_cleanup_fbdev;
 377
 378         return 0;
 379
 380 err_cleanup_fbdev:
 381         exynos_drm_fbdev_fini(drm);
 382 err_cleanup_poll:
 383         drm_kms_helper_poll_fini(drm);
 384 err_unbind_all:
 385         component_unbind_all(drm->dev, drm);
 386 err_mode_config_cleanup:
 387         drm_mode_config_cleanup(drm);
 388         drm_release_iommu_mapping(drm);
 389 err_free_private:
 390         kfree(private);
 391 err_free_drm:
 392         drm_dev_put(drm);
 393
 394         return ret;
 395 }
 396
 397 static void exynos_drm_unbind(struct device *dev)
 398 {
 399         struct drm_device *drm = dev_get_drvdata(dev);
 400
 401         drm_dev_unregister(drm);
 402
 403         exynos_drm_fbdev_fini(drm);
 404         drm_kms_helper_poll_fini(drm);
 405
 406         component_unbind_all(drm->dev, drm);
 407         drm_mode_config_cleanup(drm);
 408         drm_release_iommu_mapping(drm);
 409
 410         kfree(drm->dev_private);
 411         drm->dev_private = NULL;
 412         dev_set_drvdata(dev, NULL);
 413
 414         drm_dev_put(drm);
 415 }
 416
 417 static const struct component_master_ops exynos_drm_ops = {
 418         .bind           = exynos_drm_bind,
 419         .unbind         = exynos_drm_unbind,
 420 };
 421
 422 static int exynos_drm_platform_probe(struct platform_device *pdev)
 423 {
 424         struct component_match *match;
 425
 426         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 427
 428         match = exynos_drm_match_add(&pdev->dev);
 429         if (IS_ERR(match))
 430                 return PTR_ERR(match);
 431
 432         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 433                                                match);
 434 }
 435
 436 static int exynos_drm_platform_remove(struct platform_device *pdev)
 437 {
 438         component_master_del(&pdev->dev, &exynos_drm_ops);
 439         return 0;
 440 }
 441
 442 static struct platform_driver exynos_drm_platform_driver = {
 443         .probe  = exynos_drm_platform_probe,
 444         .remove = exynos_drm_platform_remove,
 445         .driver = {
 446                 .name   = "exynos-drm",
 447                 .pm     = &exynos_drm_pm_ops,
 448         },
 449 };
 450
 451 static void exynos_drm_unregister_devices(void)
 452 {
 453         int i;
 454
 455         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 456                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 457                 struct device *dev;
 458
 459                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 460                         continue;
 461
 462                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 463                                             &info->driver->driver,
 464                                             (void *)platform_bus_type.match))) {
 465                         put_device(dev);
 466                         platform_device_unregister(to_platform_device(dev));
 467                 }
 468         }
 469 }
 470
 471 static int exynos_drm_register_devices(void)
 472 {
 473         struct platform_device *pdev;
 474         int i;
 475
 476         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 477                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 478
 479                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 480                         continue;
 481
 482                 pdev = platform_device_register_simple(
 483                                         info->driver->driver.name, -1, NULL, 0);
 484                 if (IS_ERR(pdev))
 485                         goto fail;
 486         }
 487
 488         return 0;
 489 fail:
 490         exynos_drm_unregister_devices();
 491         return PTR_ERR(pdev);
 492 }
 493
 494 static void exynos_drm_unregister_drivers(void)
 495 {
 496         int i;
 497
 498         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 499                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 500
 501                 if (!info->driver)
 502                         continue;
 503
 504                 platform_driver_unregister(info->driver);
 505         }
 506 }
 507
 508 static int exynos_drm_register_drivers(void)
 509 {
 510         int i, ret;
 511
 512         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 513                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 514
 515                 if (!info->driver)
 516                         continue;
 517
 518                 ret = platform_driver_register(info->driver);
 519                 if (ret)
 520                         goto fail;
 521         }
 522         return 0;
 523 fail:
 524         exynos_drm_unregister_drivers();
 525         return ret;
 526 }
 527
 528 static int exynos_drm_init(void)
 529 {
 530         int ret;
 531
 532         ret = exynos_drm_register_devices();
 533         if (ret)
 534                 return ret;
 535
 536         ret = exynos_drm_register_drivers();
 537         if (ret)
 538                 goto err_unregister_pdevs;
 539
 540         return 0;
 541
 542 err_unregister_pdevs:
 543         exynos_drm_unregister_devices();
 544
 545         return ret;
 546 }
 547
 548 static void exynos_drm_exit(void)
 549 {
 550         exynos_drm_unregister_drivers();
 551         exynos_drm_unregister_devices();
 552 }
 553
 554 module_init(exynos_drm_init);
 555 module_exit(exynos_drm_exit);
 556
 557 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 558 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 559 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 560 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 561 MODULE_LICENSE("GPL");