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/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 drm_ioctl_desc exynos_ioctls[] = {
  79         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
  80                         DRM_RENDER_ALLOW),
  81         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
  82                         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_RENDER_ALLOW),
  89         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
  90                         DRM_RENDER_ALLOW),
  91         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
  92                         DRM_RENDER_ALLOW),
  93         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
  94                         exynos_drm_ipp_get_res_ioctl,
  95                         DRM_RENDER_ALLOW),
  96         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
  97                         DRM_RENDER_ALLOW),
  98         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
  99                         exynos_drm_ipp_get_limits_ioctl,
 100                         DRM_RENDER_ALLOW),
 101         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 102                         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 const struct drm_driver exynos_drm_driver = {
 117         .driver_features        = DRIVER_MODESET | DRIVER_GEM
 118                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 119         .open                   = exynos_drm_open,
 120         .lastclose              = drm_fb_helper_lastclose,
 121         .postclose              = exynos_drm_postclose,
 122         .dumb_create            = exynos_drm_gem_dumb_create,
 123         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 124         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 125         .gem_prime_import       = exynos_drm_gem_prime_import,
 126         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 127         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 128         .ioctls                 = exynos_ioctls,
 129         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 130         .fops                   = &exynos_drm_driver_fops,
 131         .name   = DRIVER_NAME,
 132         .desc   = DRIVER_DESC,
 133         .date   = DRIVER_DATE,
 134         .major  = DRIVER_MAJOR,
 135         .minor  = DRIVER_MINOR,
 136 };
 137
 138 static int exynos_drm_suspend(struct device *dev)
 139 {
 140         struct drm_device *drm_dev = dev_get_drvdata(dev);
 141
 142         return  drm_mode_config_helper_suspend(drm_dev);
 143 }
 144
 145 static void exynos_drm_resume(struct device *dev)
 146 {
 147         struct drm_device *drm_dev = dev_get_drvdata(dev);
 148
 149         drm_mode_config_helper_resume(drm_dev);
 150 }
 151
 152 static const struct dev_pm_ops exynos_drm_pm_ops = {
 153         .prepare = exynos_drm_suspend,
 154         .complete = exynos_drm_resume,
 155 };
 156
 157 /* forward declaration */
 158 static struct platform_driver exynos_drm_platform_driver;
 159
 160 struct exynos_drm_driver_info {
 161         struct platform_driver *driver;
 162         unsigned int flags;
 163 };
 164
 165 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 166 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 167 #define DRM_FIMC_DEVICE         BIT(2)  /* devices shared with V4L2 subsystem */
 168
 169 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 170
 171 /*
 172  * Connector drivers should not be placed before associated crtc drivers,
 173  * because connector requires pipe number of its crtc during initialization.
 174  */
 175 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 176         {
 177                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 178                 DRM_COMPONENT_DRIVER
 179         }, {
 180                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 181                 DRM_COMPONENT_DRIVER
 182         }, {
 183                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 184                 DRM_COMPONENT_DRIVER
 185         }, {
 186                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 187                 DRM_COMPONENT_DRIVER
 188         }, {
 189                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 190                 DRM_COMPONENT_DRIVER
 191         }, {
 192                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 193                 DRM_COMPONENT_DRIVER
 194         }, {
 195                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 196                 DRM_COMPONENT_DRIVER
 197         }, {
 198                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 199                 DRM_COMPONENT_DRIVER
 200         }, {
 201                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 202                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 203         }, {
 204                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 205                 DRM_COMPONENT_DRIVER
 206         }, {
 207                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 208                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 209         }, {
 210                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 211                 DRM_COMPONENT_DRIVER
 212         }, {
 213                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 214                 DRM_COMPONENT_DRIVER
 215         }, {
 216                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 217                 DRM_COMPONENT_DRIVER
 218         }, {
 219                 &exynos_drm_platform_driver,
 220                 DRM_VIRTUAL_DEVICE
 221         }
 222 };
 223
 224 static int compare_dev(struct device *dev, void *data)
 225 {
 226         return dev == (struct device *)data;
 227 }
 228
 229 static struct component_match *exynos_drm_match_add(struct device *dev)
 230 {
 231         struct component_match *match = NULL;
 232         int i;
 233
 234         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 235                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 236                 struct device *p = NULL, *d;
 237
 238                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 239                         continue;
 240
 241                 while ((d = platform_find_device_by_driver(p, &info->driver->driver))) {
 242                         put_device(p);
 243
 244                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 245                             exynos_drm_check_fimc_device(d) == 0)
 246                                 component_match_add(dev, &match,
 247                                                     compare_dev, d);
 248                         p = d;
 249                 }
 250                 put_device(p);
 251         }
 252
 253         return match ?: ERR_PTR(-ENODEV);
 254 }
 255
 256 static int exynos_drm_bind(struct device *dev)
 257 {
 258         struct exynos_drm_private *private;
 259         struct drm_encoder *encoder;
 260         struct drm_device *drm;
 261         unsigned int clone_mask;
 262         int ret;
 263
 264         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 265         if (IS_ERR(drm))
 266                 return PTR_ERR(drm);
 267
 268         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 269         if (!private) {
 270                 ret = -ENOMEM;
 271                 goto err_free_drm;
 272         }
 273
 274         init_waitqueue_head(&private->wait);
 275         spin_lock_init(&private->lock);
 276
 277         dev_set_drvdata(dev, drm);
 278         drm->dev_private = (void *)private;
 279
 280         drm_mode_config_init(drm);
 281
 282         exynos_drm_mode_config_init(drm);
 283
 284         /* setup possible_clones. */
 285         clone_mask = 0;
 286         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 287                 clone_mask |= drm_encoder_mask(encoder);
 288
 289         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 290                 encoder->possible_clones = clone_mask;
 291
 292         /* Try to bind all sub drivers. */
 293         ret = component_bind_all(drm->dev, drm);
 294         if (ret)
 295                 goto err_mode_config_cleanup;
 296
 297         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 298         if (ret)
 299                 goto err_unbind_all;
 300
 301         drm_mode_config_reset(drm);
 302
 303         /*
 304          * enable drm irq mode.
 305          * - with irq_enabled = true, we can use the vblank feature.
 306          *
 307          * P.S. note that we wouldn't use drm irq handler but
 308          *      just specific driver own one instead because
 309          *      drm framework supports only one irq handler.
 310          */
 311         drm->irq_enabled = true;
 312
 313         /* init kms poll for handling hpd */
 314         drm_kms_helper_poll_init(drm);
 315
 316         ret = exynos_drm_fbdev_init(drm);
 317         if (ret)
 318                 goto err_cleanup_poll;
 319
 320         /* register the DRM device */
 321         ret = drm_dev_register(drm, 0);
 322         if (ret < 0)
 323                 goto err_cleanup_fbdev;
 324
 325         return 0;
 326
 327 err_cleanup_fbdev:
 328         exynos_drm_fbdev_fini(drm);
 329 err_cleanup_poll:
 330         drm_kms_helper_poll_fini(drm);
 331 err_unbind_all:
 332         component_unbind_all(drm->dev, drm);
 333 err_mode_config_cleanup:
 334         drm_mode_config_cleanup(drm);
 335         exynos_drm_cleanup_dma(drm);
 336         kfree(private);
 337 err_free_drm:
 338         drm_dev_put(drm);
 339
 340         return ret;
 341 }
 342
 343 static void exynos_drm_unbind(struct device *dev)
 344 {
 345         struct drm_device *drm = dev_get_drvdata(dev);
 346
 347         drm_dev_unregister(drm);
 348
 349         exynos_drm_fbdev_fini(drm);
 350         drm_kms_helper_poll_fini(drm);
 351
 352         component_unbind_all(drm->dev, drm);
 353         drm_mode_config_cleanup(drm);
 354         exynos_drm_cleanup_dma(drm);
 355
 356         kfree(drm->dev_private);
 357         drm->dev_private = NULL;
 358         dev_set_drvdata(dev, NULL);
 359
 360         drm_dev_put(drm);
 361 }
 362
 363 static const struct component_master_ops exynos_drm_ops = {
 364         .bind           = exynos_drm_bind,
 365         .unbind         = exynos_drm_unbind,
 366 };
 367
 368 static int exynos_drm_platform_probe(struct platform_device *pdev)
 369 {
 370         struct component_match *match;
 371
 372         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 373
 374         match = exynos_drm_match_add(&pdev->dev);
 375         if (IS_ERR(match))
 376                 return PTR_ERR(match);
 377
 378         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 379                                                match);
 380 }
 381
 382 static int exynos_drm_platform_remove(struct platform_device *pdev)
 383 {
 384         component_master_del(&pdev->dev, &exynos_drm_ops);
 385         return 0;
 386 }
 387
 388 static struct platform_driver exynos_drm_platform_driver = {
 389         .probe  = exynos_drm_platform_probe,
 390         .remove = exynos_drm_platform_remove,
 391         .driver = {
 392                 .name   = "exynos-drm",
 393                 .pm     = &exynos_drm_pm_ops,
 394         },
 395 };
 396
 397 static void exynos_drm_unregister_devices(void)
 398 {
 399         int i;
 400
 401         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 402                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 403                 struct device *dev;
 404
 405                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 406                         continue;
 407
 408                 while ((dev = platform_find_device_by_driver(NULL,
 409                                                 &info->driver->driver))) {
 410                         put_device(dev);
 411                         platform_device_unregister(to_platform_device(dev));
 412                 }
 413         }
 414 }
 415
 416 static int exynos_drm_register_devices(void)
 417 {
 418         struct platform_device *pdev;
 419         int i;
 420
 421         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 422                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 423
 424                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 425                         continue;
 426
 427                 pdev = platform_device_register_simple(
 428                                         info->driver->driver.name, -1, NULL, 0);
 429                 if (IS_ERR(pdev))
 430                         goto fail;
 431         }
 432
 433         return 0;
 434 fail:
 435         exynos_drm_unregister_devices();
 436         return PTR_ERR(pdev);
 437 }
 438
 439 static void exynos_drm_unregister_drivers(void)
 440 {
 441         int i;
 442
 443         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 444                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 445
 446                 if (!info->driver)
 447                         continue;
 448
 449                 platform_driver_unregister(info->driver);
 450         }
 451 }
 452
 453 static int exynos_drm_register_drivers(void)
 454 {
 455         int i, ret;
 456
 457         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 458                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 459
 460                 if (!info->driver)
 461                         continue;
 462
 463                 ret = platform_driver_register(info->driver);
 464                 if (ret)
 465                         goto fail;
 466         }
 467         return 0;
 468 fail:
 469         exynos_drm_unregister_drivers();
 470         return ret;
 471 }
 472
 473 static int exynos_drm_init(void)
 474 {
 475         int ret;
 476
 477         ret = exynos_drm_register_devices();
 478         if (ret)
 479                 return ret;
 480
 481         ret = exynos_drm_register_drivers();
 482         if (ret)
 483                 goto err_unregister_pdevs;
 484
 485         return 0;
 486
 487 err_unregister_pdevs:
 488         exynos_drm_unregister_devices();
 489
 490         return ret;
 491 }
 492
 493 static void exynos_drm_exit(void)
 494 {
 495         exynos_drm_unregister_drivers();
 496         exynos_drm_unregister_devices();
 497 }
 498
 499 module_init(exynos_drm_init);
 500 module_exit(exynos_drm_exit);
 501
 502 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 503 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 504 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 505 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 506 MODULE_LICENSE("GPL");