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 <inki.dae@samsung.com>
   6  *      Joonyoung Shim <jy0922.shim@samsung.com>
   7  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   8  */
   9
  10 #include <linux/pm_runtime.h>
  11 #include <drm/drmP.h>
  12 #include <drm/drm_atomic.h>
  13 #include <drm/drm_atomic_helper.h>
  14 #include <drm/drm_fb_helper.h>
  15 #include <drm/drm_probe_helper.h>
  16
  17 #include <linux/component.h>
  18
  19 #include <drm/exynos_drm.h>
  20
  21 #include "exynos_drm_drv.h"
  22 #include "exynos_drm_fbdev.h"
  23 #include "exynos_drm_fb.h"
  24 #include "exynos_drm_gem.h"
  25 #include "exynos_drm_plane.h"
  26 #include "exynos_drm_ipp.h"
  27 #include "exynos_drm_vidi.h"
  28 #include "exynos_drm_g2d.h"
  29
  30 #define DRIVER_NAME     "exynos"
  31 #define DRIVER_DESC     "Samsung SoC DRM"
  32 #define DRIVER_DATE     "20180330"
  33
  34 /*
  35  * Interface history:
  36  *
  37  * 1.0 - Original version
  38  * 1.1 - Upgrade IPP driver to version 2.0
  39  */
  40 #define DRIVER_MAJOR    1
  41 #define DRIVER_MINOR    1
  42
  43 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  44 {
  45         struct drm_exynos_file_private *file_priv;
  46         int ret;
  47
  48         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  49         if (!file_priv)
  50                 return -ENOMEM;
  51
  52         file->driver_priv = file_priv;
  53         ret = g2d_open(dev, file);
  54         if (ret)
  55                 goto err_file_priv_free;
  56
  57         return ret;
  58
  59 err_file_priv_free:
  60         kfree(file_priv);
  61         file->driver_priv = NULL;
  62         return ret;
  63 }
  64
  65 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  66 {
  67         g2d_close(dev, file);
  68         kfree(file->driver_priv);
  69         file->driver_priv = NULL;
  70 }
  71
  72 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  73         .fault = exynos_drm_gem_fault,
  74         .open = drm_gem_vm_open,
  75         .close = drm_gem_vm_close,
  76 };
  77
  78 static const struct drm_ioctl_desc exynos_ioctls[] = {
  79         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
  80                         DRM_AUTH | DRM_RENDER_ALLOW),
  81         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
  82                         DRM_AUTH | DRM_RENDER_ALLOW),
  83         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
  84                         DRM_RENDER_ALLOW),
  85         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
  86                         DRM_AUTH),
  87         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
  88                         DRM_AUTH | DRM_RENDER_ALLOW),
  89         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
  90                         DRM_AUTH | DRM_RENDER_ALLOW),
  91         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
  92                         DRM_AUTH | DRM_RENDER_ALLOW),
  93         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
  94                         exynos_drm_ipp_get_res_ioctl,
  95                         DRM_AUTH | DRM_RENDER_ALLOW),
  96         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
  97                         DRM_AUTH | DRM_RENDER_ALLOW),
  98         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
  99                         exynos_drm_ipp_get_limits_ioctl,
 100                         DRM_AUTH | DRM_RENDER_ALLOW),
 101         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 102                         DRM_AUTH | DRM_RENDER_ALLOW),
 103 };
 104
 105 static const struct file_operations exynos_drm_driver_fops = {
 106         .owner          = THIS_MODULE,
 107         .open           = drm_open,
 108         .mmap           = exynos_drm_gem_mmap,
 109         .poll           = drm_poll,
 110         .read           = drm_read,
 111         .unlocked_ioctl = drm_ioctl,
 112         .compat_ioctl = drm_compat_ioctl,
 113         .release        = drm_release,
 114 };
 115
 116 static struct drm_driver exynos_drm_driver = {
 117         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 118                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 119         .open                   = exynos_drm_open,
 120         .lastclose              = drm_fb_helper_lastclose,
 121         .postclose              = exynos_drm_postclose,
 122         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 123         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 124         .dumb_create            = exynos_drm_gem_dumb_create,
 125         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 126         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 127         .gem_prime_export       = drm_gem_prime_export,
 128         .gem_prime_import       = exynos_drm_gem_prime_import,
 129         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 130         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 131         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 132         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 133         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 134         .ioctls                 = exynos_ioctls,
 135         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 136         .fops                   = &exynos_drm_driver_fops,
 137         .name   = DRIVER_NAME,
 138         .desc   = DRIVER_DESC,
 139         .date   = DRIVER_DATE,
 140         .major  = DRIVER_MAJOR,
 141         .minor  = DRIVER_MINOR,
 142 };
 143
 144 static int exynos_drm_suspend(struct device *dev)
 145 {
 146         struct drm_device *drm_dev = dev_get_drvdata(dev);
 147
 148         return  drm_mode_config_helper_suspend(drm_dev);
 149 }
 150
 151 static void exynos_drm_resume(struct device *dev)
 152 {
 153         struct drm_device *drm_dev = dev_get_drvdata(dev);
 154
 155         drm_mode_config_helper_resume(drm_dev);
 156 }
 157
 158 static const struct dev_pm_ops exynos_drm_pm_ops = {
 159         .prepare = exynos_drm_suspend,
 160         .complete = exynos_drm_resume,
 161 };
 162
 163 /* forward declaration */
 164 static struct platform_driver exynos_drm_platform_driver;
 165
 166 struct exynos_drm_driver_info {
 167         struct platform_driver *driver;
 168         unsigned int flags;
 169 };
 170
 171 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 172 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 173 #define DRM_FIMC_DEVICE         BIT(2)  /* devices shared with V4L2 subsystem */
 174
 175 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 176
 177 /*
 178  * Connector drivers should not be placed before associated crtc drivers,
 179  * because connector requires pipe number of its crtc during initialization.
 180  */
 181 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 182         {
 183                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 184                 DRM_COMPONENT_DRIVER
 185         }, {
 186                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 187                 DRM_COMPONENT_DRIVER
 188         }, {
 189                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 190                 DRM_COMPONENT_DRIVER
 191         }, {
 192                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 193                 DRM_COMPONENT_DRIVER
 194         }, {
 195                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 196                 DRM_COMPONENT_DRIVER
 197         }, {
 198                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 199                 DRM_COMPONENT_DRIVER
 200         }, {
 201                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 202                 DRM_COMPONENT_DRIVER
 203         }, {
 204                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 205                 DRM_COMPONENT_DRIVER
 206         }, {
 207                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 208                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 209         }, {
 210                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 211                 DRM_COMPONENT_DRIVER
 212         }, {
 213                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 214                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 215         }, {
 216                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 217                 DRM_COMPONENT_DRIVER
 218         }, {
 219                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 220                 DRM_COMPONENT_DRIVER
 221         }, {
 222                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 223                 DRM_COMPONENT_DRIVER
 224         }, {
 225                 &exynos_drm_platform_driver,
 226                 DRM_VIRTUAL_DEVICE
 227         }
 228 };
 229
 230 static int compare_dev(struct device *dev, void *data)
 231 {
 232         return dev == (struct device *)data;
 233 }
 234
 235 static struct component_match *exynos_drm_match_add(struct device *dev)
 236 {
 237         struct component_match *match = NULL;
 238         int i;
 239
 240         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 241                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 242                 struct device *p = NULL, *d;
 243
 244                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 245                         continue;
 246
 247                 while ((d = bus_find_device(&platform_bus_type, p,
 248                                             &info->driver->driver,
 249                                             (void *)platform_bus_type.match))) {
 250                         put_device(p);
 251
 252                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 253                             exynos_drm_check_fimc_device(d) == 0)
 254                                 component_match_add(dev, &match,
 255                                                     compare_dev, d);
 256                         p = d;
 257                 }
 258                 put_device(p);
 259         }
 260
 261         return match ?: ERR_PTR(-ENODEV);
 262 }
 263
 264 static int exynos_drm_bind(struct device *dev)
 265 {
 266         struct exynos_drm_private *private;
 267         struct drm_encoder *encoder;
 268         struct drm_device *drm;
 269         unsigned int clone_mask;
 270         int cnt, ret;
 271
 272         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 273         if (IS_ERR(drm))
 274                 return PTR_ERR(drm);
 275
 276         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 277         if (!private) {
 278                 ret = -ENOMEM;
 279                 goto err_free_drm;
 280         }
 281
 282         init_waitqueue_head(&private->wait);
 283         spin_lock_init(&private->lock);
 284
 285         dev_set_drvdata(dev, drm);
 286         drm->dev_private = (void *)private;
 287
 288         drm_mode_config_init(drm);
 289
 290         exynos_drm_mode_config_init(drm);
 291
 292         /* setup possible_clones. */
 293         cnt = 0;
 294         clone_mask = 0;
 295         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 296                 clone_mask |= (1 << (cnt++));
 297
 298         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 299                 encoder->possible_clones = clone_mask;
 300
 301         /* Try to bind all sub drivers. */
 302         ret = component_bind_all(drm->dev, drm);
 303         if (ret)
 304                 goto err_mode_config_cleanup;
 305
 306         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 307         if (ret)
 308                 goto err_unbind_all;
 309
 310         drm_mode_config_reset(drm);
 311
 312         /*
 313          * enable drm irq mode.
 314          * - with irq_enabled = true, we can use the vblank feature.
 315          *
 316          * P.S. note that we wouldn't use drm irq handler but
 317          *      just specific driver own one instead because
 318          *      drm framework supports only one irq handler.
 319          */
 320         drm->irq_enabled = true;
 321
 322         /* init kms poll for handling hpd */
 323         drm_kms_helper_poll_init(drm);
 324
 325         ret = exynos_drm_fbdev_init(drm);
 326         if (ret)
 327                 goto err_cleanup_poll;
 328
 329         /* register the DRM device */
 330         ret = drm_dev_register(drm, 0);
 331         if (ret < 0)
 332                 goto err_cleanup_fbdev;
 333
 334         return 0;
 335
 336 err_cleanup_fbdev:
 337         exynos_drm_fbdev_fini(drm);
 338 err_cleanup_poll:
 339         drm_kms_helper_poll_fini(drm);
 340 err_unbind_all:
 341         component_unbind_all(drm->dev, drm);
 342 err_mode_config_cleanup:
 343         drm_mode_config_cleanup(drm);
 344         exynos_drm_cleanup_dma(drm);
 345         kfree(private);
 346 err_free_drm:
 347         drm_dev_put(drm);
 348
 349         return ret;
 350 }
 351
 352 static void exynos_drm_unbind(struct device *dev)
 353 {
 354         struct drm_device *drm = dev_get_drvdata(dev);
 355
 356         drm_dev_unregister(drm);
 357
 358         exynos_drm_fbdev_fini(drm);
 359         drm_kms_helper_poll_fini(drm);
 360
 361         component_unbind_all(drm->dev, drm);
 362         drm_mode_config_cleanup(drm);
 363         exynos_drm_cleanup_dma(drm);
 364
 365         kfree(drm->dev_private);
 366         drm->dev_private = NULL;
 367         dev_set_drvdata(dev, NULL);
 368
 369         drm_dev_put(drm);
 370 }
 371
 372 static const struct component_master_ops exynos_drm_ops = {
 373         .bind           = exynos_drm_bind,
 374         .unbind         = exynos_drm_unbind,
 375 };
 376
 377 static int exynos_drm_platform_probe(struct platform_device *pdev)
 378 {
 379         struct component_match *match;
 380
 381         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 382
 383         match = exynos_drm_match_add(&pdev->dev);
 384         if (IS_ERR(match))
 385                 return PTR_ERR(match);
 386
 387         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 388                                                match);
 389 }
 390
 391 static int exynos_drm_platform_remove(struct platform_device *pdev)
 392 {
 393         component_master_del(&pdev->dev, &exynos_drm_ops);
 394         return 0;
 395 }
 396
 397 static struct platform_driver exynos_drm_platform_driver = {
 398         .probe  = exynos_drm_platform_probe,
 399         .remove = exynos_drm_platform_remove,
 400         .driver = {
 401                 .name   = "exynos-drm",
 402                 .pm     = &exynos_drm_pm_ops,
 403         },
 404 };
 405
 406 static void exynos_drm_unregister_devices(void)
 407 {
 408         int i;
 409
 410         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 411                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 412                 struct device *dev;
 413
 414                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 415                         continue;
 416
 417                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 418                                             &info->driver->driver,
 419                                             (void *)platform_bus_type.match))) {
 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 <inki.dae@samsung.com>");
 513 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 514 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 515 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 516 MODULE_LICENSE("GPL");