drivers/gpu/drm/exynos/exynos_drm_drv.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  * Authors:
   5  *      Inki Dae <[email protected]>
   6  *      Joonyoung Shim <[email protected]>
   7  *      Seung-Woo Kim <[email protected]>
   8  */
   9
  10 #include <linux/component.h>
  11 #include <linux/dma-mapping.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/pm_runtime.h>
  14 #include <linux/uaccess.h>
  15
  16 #include <drm/drm_atomic.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_drv.h>
  19 #include <drm/drm_file.h>
  20 #include <drm/drm_fourcc.h>
  21 #include <drm/drm_ioctl.h>
  22 #include <drm/drm_probe_helper.h>
  23 #include <drm/drm_vblank.h>
  24 #include <drm/exynos_drm.h>
  25
  26 #include "exynos_drm_drv.h"
  27 #include "exynos_drm_fb.h"
  28 #include "exynos_drm_fbdev.h"
  29 #include "exynos_drm_g2d.h"
  30 #include "exynos_drm_gem.h"
  31 #include "exynos_drm_ipp.h"
  32 #include "exynos_drm_plane.h"
  33 #include "exynos_drm_vidi.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 drm_ioctl_desc exynos_ioctls[] = {
  78         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
  79                         DRM_RENDER_ALLOW),
  80         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
  81                         DRM_RENDER_ALLOW),
  82         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
  83                         DRM_RENDER_ALLOW),
  84         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
  85                         DRM_AUTH),
  86         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
  87                         DRM_RENDER_ALLOW),
  88         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
  89                         DRM_RENDER_ALLOW),
  90         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
  91                         DRM_RENDER_ALLOW),
  92         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
  93                         exynos_drm_ipp_get_res_ioctl,
  94                         DRM_RENDER_ALLOW),
  95         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
  96                         DRM_RENDER_ALLOW),
  97         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
  98                         exynos_drm_ipp_get_limits_ioctl,
  99                         DRM_RENDER_ALLOW),
 100         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 101                         DRM_RENDER_ALLOW),
 102 };
 103
 104 DEFINE_DRM_GEM_FOPS(exynos_drm_driver_fops);
 105
 106 static const struct drm_driver exynos_drm_driver = {
 107         .driver_features        = DRIVER_MODESET | DRIVER_GEM
 108                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 109         .open                   = exynos_drm_open,
 110         .postclose              = exynos_drm_postclose,
 111         .dumb_create            = exynos_drm_gem_dumb_create,
 112         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 113         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 114         .gem_prime_import       = exynos_drm_gem_prime_import,
 115         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 116         .gem_prime_mmap         = drm_gem_prime_mmap,
 117         .ioctls                 = exynos_ioctls,
 118         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 119         .fops                   = &exynos_drm_driver_fops,
 120         .name   = DRIVER_NAME,
 121         .desc   = DRIVER_DESC,
 122         .date   = DRIVER_DATE,
 123         .major  = DRIVER_MAJOR,
 124         .minor  = DRIVER_MINOR,
 125 };
 126
 127 static int exynos_drm_suspend(struct device *dev)
 128 {
 129         struct drm_device *drm_dev = dev_get_drvdata(dev);
 130
 131         return  drm_mode_config_helper_suspend(drm_dev);
 132 }
 133
 134 static void exynos_drm_resume(struct device *dev)
 135 {
 136         struct drm_device *drm_dev = dev_get_drvdata(dev);
 137
 138         drm_mode_config_helper_resume(drm_dev);
 139 }
 140
 141 static const struct dev_pm_ops exynos_drm_pm_ops = {
 142         .prepare = exynos_drm_suspend,
 143         .complete = exynos_drm_resume,
 144 };
 145
 146 /* forward declaration */
 147 static struct platform_driver exynos_drm_platform_driver;
 148
 149 struct exynos_drm_driver_info {
 150         struct platform_driver *driver;
 151         unsigned int flags;
 152 };
 153
 154 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 155 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 156 #define DRM_FIMC_DEVICE         BIT(2)  /* devices shared with V4L2 subsystem */
 157
 158 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 159
 160 /*
 161  * Connector drivers should not be placed before associated crtc drivers,
 162  * because connector requires pipe number of its crtc during initialization.
 163  */
 164 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 165         {
 166                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 167                 DRM_COMPONENT_DRIVER
 168         }, {
 169                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 170                 DRM_COMPONENT_DRIVER
 171         }, {
 172                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 173                 DRM_COMPONENT_DRIVER
 174         }, {
 175                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 176                 DRM_COMPONENT_DRIVER
 177         }, {
 178                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 179                 DRM_COMPONENT_DRIVER
 180         }, {
 181                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 182                 DRM_COMPONENT_DRIVER
 183         }, {
 184                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 185                 DRM_COMPONENT_DRIVER
 186         }, {
 187                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 188                 DRM_COMPONENT_DRIVER
 189         }, {
 190                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 191                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 192         }, {
 193                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 194                 DRM_COMPONENT_DRIVER
 195         }, {
 196                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 197                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 198         }, {
 199                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 200                 DRM_COMPONENT_DRIVER
 201         }, {
 202                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 203                 DRM_COMPONENT_DRIVER
 204         }, {
 205                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 206                 DRM_COMPONENT_DRIVER
 207         }, {
 208                 &exynos_drm_platform_driver,
 209                 DRM_VIRTUAL_DEVICE
 210         }
 211 };
 212
 213 static struct component_match *exynos_drm_match_add(struct device *dev)
 214 {
 215         struct component_match *match = NULL;
 216         int i;
 217
 218         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 219                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 220                 struct device *p = NULL, *d;
 221
 222                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 223                         continue;
 224
 225                 while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
 226                         put_device(p);
 227
 228                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 229                             exynos_drm_check_fimc_device(d) == 0)
 230                                 component_match_add(dev, &match, component_compare_dev, d);
 231                         p = d;
 232                 }
 233                 put_device(p);
 234         }
 235
 236         return match ?: ERR_PTR(-ENODEV);
 237 }
 238
 239 static int exynos_drm_bind(struct device *dev)
 240 {
 241         struct exynos_drm_private *private;
 242         struct drm_encoder *encoder;
 243         struct drm_device *drm;
 244         unsigned int clone_mask;
 245         int ret;
 246
 247         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 248         if (IS_ERR(drm))
 249                 return PTR_ERR(drm);
 250
 251         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 252         if (!private) {
 253                 ret = -ENOMEM;
 254                 goto err_free_drm;
 255         }
 256
 257         init_waitqueue_head(&private->wait);
 258         spin_lock_init(&private->lock);
 259
 260         dev_set_drvdata(dev, drm);
 261         drm->dev_private = (void *)private;
 262
 263         drm_mode_config_init(drm);
 264
 265         exynos_drm_mode_config_init(drm);
 266
 267         /* setup possible_clones. */
 268         clone_mask = 0;
 269         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 270                 clone_mask |= drm_encoder_mask(encoder);
 271
 272         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 273                 encoder->possible_clones = clone_mask;
 274
 275         /* Try to bind all sub drivers. */
 276         ret = component_bind_all(drm->dev, drm);
 277         if (ret)
 278                 goto err_mode_config_cleanup;
 279
 280         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 281         if (ret)
 282                 goto err_unbind_all;
 283
 284         drm_mode_config_reset(drm);
 285
 286         /* init kms poll for handling hpd */
 287         drm_kms_helper_poll_init(drm);
 288
 289         /* register the DRM device */
 290         ret = drm_dev_register(drm, 0);
 291         if (ret < 0)
 292                 goto err_cleanup_poll;
 293
 294         exynos_drm_fbdev_setup(drm);
 295
 296         return 0;
 297
 298 err_cleanup_poll:
 299         drm_kms_helper_poll_fini(drm);
 300 err_unbind_all:
 301         component_unbind_all(drm->dev, drm);
 302 err_mode_config_cleanup:
 303         drm_mode_config_cleanup(drm);
 304         exynos_drm_cleanup_dma(drm);
 305         kfree(private);
 306 err_free_drm:
 307         drm_dev_put(drm);
 308
 309         return ret;
 310 }
 311
 312 static void exynos_drm_unbind(struct device *dev)
 313 {
 314         struct drm_device *drm = dev_get_drvdata(dev);
 315
 316         drm_dev_unregister(drm);
 317
 318         drm_kms_helper_poll_fini(drm);
 319
 320         component_unbind_all(drm->dev, drm);
 321         drm_mode_config_cleanup(drm);
 322         exynos_drm_cleanup_dma(drm);
 323
 324         kfree(drm->dev_private);
 325         drm->dev_private = NULL;
 326         dev_set_drvdata(dev, NULL);
 327
 328         drm_dev_put(drm);
 329 }
 330
 331 static const struct component_master_ops exynos_drm_ops = {
 332         .bind           = exynos_drm_bind,
 333         .unbind         = exynos_drm_unbind,
 334 };
 335
 336 static int exynos_drm_platform_probe(struct platform_device *pdev)
 337 {
 338         struct component_match *match;
 339
 340         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 341
 342         match = exynos_drm_match_add(&pdev->dev);
 343         if (IS_ERR(match))
 344                 return PTR_ERR(match);
 345
 346         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 347                                                match);
 348 }
 349
 350 static int exynos_drm_platform_remove(struct platform_device *pdev)
 351 {
 352         component_master_del(&pdev->dev, &exynos_drm_ops);
 353         return 0;
 354 }
 355
 356 static struct platform_driver exynos_drm_platform_driver = {
 357         .probe  = exynos_drm_platform_probe,
 358         .remove = exynos_drm_platform_remove,
 359         .driver = {
 360                 .name   = "exynos-drm",
 361                 .pm     = &exynos_drm_pm_ops,
 362         },
 363 };
 364
 365 static void exynos_drm_unregister_devices(void)
 366 {
 367         int i;
 368
 369         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 370                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 371                 struct device *dev;
 372
 373                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 374                         continue;
 375
 376                 while ((dev = platform_find_device_by_driver(NULL,
 377                                                 &info->driver->driver))) {
 378                         put_device(dev);
 379                         platform_device_unregister(to_platform_device(dev));
 380                 }
 381         }
 382 }
 383
 384 static int exynos_drm_register_devices(void)
 385 {
 386         struct platform_device *pdev;
 387         int i;
 388
 389         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 390                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 391
 392                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 393                         continue;
 394
 395                 pdev = platform_device_register_simple(
 396                                         info->driver->driver.name, -1, NULL, 0);
 397                 if (IS_ERR(pdev))
 398                         goto fail;
 399         }
 400
 401         return 0;
 402 fail:
 403         exynos_drm_unregister_devices();
 404         return PTR_ERR(pdev);
 405 }
 406
 407 static void exynos_drm_unregister_drivers(void)
 408 {
 409         int i;
 410
 411         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 412                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 413
 414                 if (!info->driver)
 415                         continue;
 416
 417                 platform_driver_unregister(info->driver);
 418         }
 419 }
 420
 421 static int exynos_drm_register_drivers(void)
 422 {
 423         int i, ret;
 424
 425         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 426                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 427
 428                 if (!info->driver)
 429                         continue;
 430
 431                 ret = platform_driver_register(info->driver);
 432                 if (ret)
 433                         goto fail;
 434         }
 435         return 0;
 436 fail:
 437         exynos_drm_unregister_drivers();
 438         return ret;
 439 }
 440
 441 static int exynos_drm_init(void)
 442 {
 443         int ret;
 444
 445         if (drm_firmware_drivers_only())
 446                 return -ENODEV;
 447
 448         ret = exynos_drm_register_devices();
 449         if (ret)
 450                 return ret;
 451
 452         ret = exynos_drm_register_drivers();
 453         if (ret)
 454                 goto err_unregister_pdevs;
 455
 456         return 0;
 457
 458 err_unregister_pdevs:
 459         exynos_drm_unregister_devices();
 460
 461         return ret;
 462 }
 463
 464 static void exynos_drm_exit(void)
 465 {
 466         exynos_drm_unregister_drivers();
 467         exynos_drm_unregister_devices();
 468 }
 469
 470 module_init(exynos_drm_init);
 471 module_exit(exynos_drm_exit);
 472
 473 MODULE_AUTHOR("Inki Dae <[email protected]>");
 474 MODULE_AUTHOR("Joonyoung Shim <[email protected]>");
 475 MODULE_AUTHOR("Seung-Woo Kim <[email protected]>");
 476 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 477 MODULE_LICENSE("GPL");