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