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/pm_runtime.h>
  12
  13 #include <drm/drm_atomic.h>
  14 #include <drm/drm_atomic_helper.h>
  15 #include <drm/drm_fb_helper.h>
  16 #include <drm/drm_probe_helper.h>
  17 #include <drm/exynos_drm.h>
  18
  19 #include "exynos_drm_drv.h"
  20 #include "exynos_drm_fb.h"
  21 #include "exynos_drm_fbdev.h"
  22 #include "exynos_drm_g2d.h"
  23 #include "exynos_drm_gem.h"
  24 #include "exynos_drm_ipp.h"
  25 #include "exynos_drm_plane.h"
  26 #include "exynos_drm_vidi.h"
  27
  28 #define DRIVER_NAME     "exynos"
  29 #define DRIVER_DESC     "Samsung SoC DRM"
  30 #define DRIVER_DATE     "20180330"
  31
  32 /*
  33  * Interface history:
  34  *
  35  * 1.0 - Original version
  36  * 1.1 - Upgrade IPP driver to version 2.0
  37  */
  38 #define DRIVER_MAJOR    1
  39 #define DRIVER_MINOR    1
  40
  41 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
  42 {
  43         struct drm_exynos_file_private *file_priv;
  44         int ret;
  45
  46         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
  47         if (!file_priv)
  48                 return -ENOMEM;
  49
  50         file->driver_priv = file_priv;
  51         ret = g2d_open(dev, file);
  52         if (ret)
  53                 goto err_file_priv_free;
  54
  55         return ret;
  56
  57 err_file_priv_free:
  58         kfree(file_priv);
  59         file->driver_priv = NULL;
  60         return ret;
  61 }
  62
  63 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
  64 {
  65         g2d_close(dev, file);
  66         kfree(file->driver_priv);
  67         file->driver_priv = NULL;
  68 }
  69
  70 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
  71         .fault = exynos_drm_gem_fault,
  72         .open = drm_gem_vm_open,
  73         .close = drm_gem_vm_close,
  74 };
  75
  76 static const struct drm_ioctl_desc exynos_ioctls[] = {
  77         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
  78                         DRM_AUTH | DRM_RENDER_ALLOW),
  79         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
  80                         DRM_AUTH | DRM_RENDER_ALLOW),
  81         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
  82                         DRM_RENDER_ALLOW),
  83         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
  84                         DRM_AUTH),
  85         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
  86                         DRM_AUTH | DRM_RENDER_ALLOW),
  87         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
  88                         DRM_AUTH | DRM_RENDER_ALLOW),
  89         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
  90                         DRM_AUTH | DRM_RENDER_ALLOW),
  91         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
  92                         exynos_drm_ipp_get_res_ioctl,
  93                         DRM_AUTH | DRM_RENDER_ALLOW),
  94         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
  95                         DRM_AUTH | DRM_RENDER_ALLOW),
  96         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
  97                         exynos_drm_ipp_get_limits_ioctl,
  98                         DRM_AUTH | DRM_RENDER_ALLOW),
  99         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
 100                         DRM_AUTH | DRM_RENDER_ALLOW),
 101 };
 102
 103 static const struct file_operations exynos_drm_driver_fops = {
 104         .owner          = THIS_MODULE,
 105         .open           = drm_open,
 106         .mmap           = exynos_drm_gem_mmap,
 107         .poll           = drm_poll,
 108         .read           = drm_read,
 109         .unlocked_ioctl = drm_ioctl,
 110         .compat_ioctl = drm_compat_ioctl,
 111         .release        = drm_release,
 112 };
 113
 114 static struct drm_driver exynos_drm_driver = {
 115         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 116                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 117         .open                   = exynos_drm_open,
 118         .lastclose              = drm_fb_helper_lastclose,
 119         .postclose              = exynos_drm_postclose,
 120         .gem_free_object_unlocked = exynos_drm_gem_free_object,
 121         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 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_export       = drm_gem_prime_export,
 126         .gem_prime_import       = exynos_drm_gem_prime_import,
 127         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 128         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 129         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 130         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 131         .gem_prime_mmap         = exynos_drm_gem_prime_mmap,
 132         .ioctls                 = exynos_ioctls,
 133         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 134         .fops                   = &exynos_drm_driver_fops,
 135         .name   = DRIVER_NAME,
 136         .desc   = DRIVER_DESC,
 137         .date   = DRIVER_DATE,
 138         .major  = DRIVER_MAJOR,
 139         .minor  = DRIVER_MINOR,
 140 };
 141
 142 static int exynos_drm_suspend(struct device *dev)
 143 {
 144         struct drm_device *drm_dev = dev_get_drvdata(dev);
 145
 146         return  drm_mode_config_helper_suspend(drm_dev);
 147 }
 148
 149 static void exynos_drm_resume(struct device *dev)
 150 {
 151         struct drm_device *drm_dev = dev_get_drvdata(dev);
 152
 153         drm_mode_config_helper_resume(drm_dev);
 154 }
 155
 156 static const struct dev_pm_ops exynos_drm_pm_ops = {
 157         .prepare = exynos_drm_suspend,
 158         .complete = exynos_drm_resume,
 159 };
 160
 161 /* forward declaration */
 162 static struct platform_driver exynos_drm_platform_driver;
 163
 164 struct exynos_drm_driver_info {
 165         struct platform_driver *driver;
 166         unsigned int flags;
 167 };
 168
 169 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 170 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 171 #define DRM_FIMC_DEVICE         BIT(2)  /* devices shared with V4L2 subsystem */
 172
 173 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 174
 175 /*
 176  * Connector drivers should not be placed before associated crtc drivers,
 177  * because connector requires pipe number of its crtc during initialization.
 178  */
 179 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 180         {
 181                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 182                 DRM_COMPONENT_DRIVER
 183         }, {
 184                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 185                 DRM_COMPONENT_DRIVER
 186         }, {
 187                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 188                 DRM_COMPONENT_DRIVER
 189         }, {
 190                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 191                 DRM_COMPONENT_DRIVER
 192         }, {
 193                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 194                 DRM_COMPONENT_DRIVER
 195         }, {
 196                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 197                 DRM_COMPONENT_DRIVER
 198         }, {
 199                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 200                 DRM_COMPONENT_DRIVER
 201         }, {
 202                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 203                 DRM_COMPONENT_DRIVER
 204         }, {
 205                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 206                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 207         }, {
 208                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 209                 DRM_COMPONENT_DRIVER
 210         }, {
 211                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 212                 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE,
 213         }, {
 214                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 215                 DRM_COMPONENT_DRIVER
 216         }, {
 217                 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER),
 218                 DRM_COMPONENT_DRIVER
 219         }, {
 220                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 221                 DRM_COMPONENT_DRIVER
 222         }, {
 223                 &exynos_drm_platform_driver,
 224                 DRM_VIRTUAL_DEVICE
 225         }
 226 };
 227
 228 static int compare_dev(struct device *dev, void *data)
 229 {
 230         return dev == (struct device *)data;
 231 }
 232
 233 static struct component_match *exynos_drm_match_add(struct device *dev)
 234 {
 235         struct component_match *match = NULL;
 236         int i;
 237
 238         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 239                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 240                 struct device *p = NULL, *d;
 241
 242                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 243                         continue;
 244
 245                 while ((d = bus_find_device(&platform_bus_type, p,
 246                                             &info->driver->driver,
 247                                             (void *)platform_bus_type.match))) {
 248                         put_device(p);
 249
 250                         if (!(info->flags & DRM_FIMC_DEVICE) ||
 251                             exynos_drm_check_fimc_device(d) == 0)
 252                                 component_match_add(dev, &match,
 253                                                     compare_dev, d);
 254                         p = d;
 255                 }
 256                 put_device(p);
 257         }
 258
 259         return match ?: ERR_PTR(-ENODEV);
 260 }
 261
 262 static int exynos_drm_bind(struct device *dev)
 263 {
 264         struct exynos_drm_private *private;
 265         struct drm_encoder *encoder;
 266         struct drm_device *drm;
 267         unsigned int clone_mask;
 268         int cnt, ret;
 269
 270         drm = drm_dev_alloc(&exynos_drm_driver, dev);
 271         if (IS_ERR(drm))
 272                 return PTR_ERR(drm);
 273
 274         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 275         if (!private) {
 276                 ret = -ENOMEM;
 277                 goto err_free_drm;
 278         }
 279
 280         init_waitqueue_head(&private->wait);
 281         spin_lock_init(&private->lock);
 282
 283         dev_set_drvdata(dev, drm);
 284         drm->dev_private = (void *)private;
 285
 286         drm_mode_config_init(drm);
 287
 288         exynos_drm_mode_config_init(drm);
 289
 290         /* setup possible_clones. */
 291         cnt = 0;
 292         clone_mask = 0;
 293         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 294                 clone_mask |= (1 << (cnt++));
 295
 296         list_for_each_entry(encoder, &drm->mode_config.encoder_list, head)
 297                 encoder->possible_clones = clone_mask;
 298
 299         /* Try to bind all sub drivers. */
 300         ret = component_bind_all(drm->dev, drm);
 301         if (ret)
 302                 goto err_mode_config_cleanup;
 303
 304         ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
 305         if (ret)
 306                 goto err_unbind_all;
 307
 308         drm_mode_config_reset(drm);
 309
 310         /*
 311          * enable drm irq mode.
 312          * - with irq_enabled = true, we can use the vblank feature.
 313          *
 314          * P.S. note that we wouldn't use drm irq handler but
 315          *      just specific driver own one instead because
 316          *      drm framework supports only one irq handler.
 317          */
 318         drm->irq_enabled = true;
 319
 320         /* init kms poll for handling hpd */
 321         drm_kms_helper_poll_init(drm);
 322
 323         ret = exynos_drm_fbdev_init(drm);
 324         if (ret)
 325                 goto err_cleanup_poll;
 326
 327         /* register the DRM device */
 328         ret = drm_dev_register(drm, 0);
 329         if (ret < 0)
 330                 goto err_cleanup_fbdev;
 331
 332         return 0;
 333
 334 err_cleanup_fbdev:
 335         exynos_drm_fbdev_fini(drm);
 336 err_cleanup_poll:
 337         drm_kms_helper_poll_fini(drm);
 338 err_unbind_all:
 339         component_unbind_all(drm->dev, drm);
 340 err_mode_config_cleanup:
 341         drm_mode_config_cleanup(drm);
 342         exynos_drm_cleanup_dma(drm);
 343         kfree(private);
 344 err_free_drm:
 345         drm_dev_put(drm);
 346
 347         return ret;
 348 }
 349
 350 static void exynos_drm_unbind(struct device *dev)
 351 {
 352         struct drm_device *drm = dev_get_drvdata(dev);
 353
 354         drm_dev_unregister(drm);
 355
 356         exynos_drm_fbdev_fini(drm);
 357         drm_kms_helper_poll_fini(drm);
 358
 359         component_unbind_all(drm->dev, drm);
 360         drm_mode_config_cleanup(drm);
 361         exynos_drm_cleanup_dma(drm);
 362
 363         kfree(drm->dev_private);
 364         drm->dev_private = NULL;
 365         dev_set_drvdata(dev, NULL);
 366
 367         drm_dev_put(drm);
 368 }
 369
 370 static const struct component_master_ops exynos_drm_ops = {
 371         .bind           = exynos_drm_bind,
 372         .unbind         = exynos_drm_unbind,
 373 };
 374
 375 static int exynos_drm_platform_probe(struct platform_device *pdev)
 376 {
 377         struct component_match *match;
 378
 379         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 380
 381         match = exynos_drm_match_add(&pdev->dev);
 382         if (IS_ERR(match))
 383                 return PTR_ERR(match);
 384
 385         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 386                                                match);
 387 }
 388
 389 static int exynos_drm_platform_remove(struct platform_device *pdev)
 390 {
 391         component_master_del(&pdev->dev, &exynos_drm_ops);
 392         return 0;
 393 }
 394
 395 static struct platform_driver exynos_drm_platform_driver = {
 396         .probe  = exynos_drm_platform_probe,
 397         .remove = exynos_drm_platform_remove,
 398         .driver = {
 399                 .name   = "exynos-drm",
 400                 .pm     = &exynos_drm_pm_ops,
 401         },
 402 };
 403
 404 static void exynos_drm_unregister_devices(void)
 405 {
 406         int i;
 407
 408         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 409                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 410                 struct device *dev;
 411
 412                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 413                         continue;
 414
 415                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 416                                             &info->driver->driver,
 417                                             (void *)platform_bus_type.match))) {
 418                         put_device(dev);
 419                         platform_device_unregister(to_platform_device(dev));
 420                 }
 421         }
 422 }
 423
 424 static int exynos_drm_register_devices(void)
 425 {
 426         struct platform_device *pdev;
 427         int i;
 428
 429         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 430                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 431
 432                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 433                         continue;
 434
 435                 pdev = platform_device_register_simple(
 436                                         info->driver->driver.name, -1, NULL, 0);
 437                 if (IS_ERR(pdev))
 438                         goto fail;
 439         }
 440
 441         return 0;
 442 fail:
 443         exynos_drm_unregister_devices();
 444         return PTR_ERR(pdev);
 445 }
 446
 447 static void exynos_drm_unregister_drivers(void)
 448 {
 449         int i;
 450
 451         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 452                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 453
 454                 if (!info->driver)
 455                         continue;
 456
 457                 platform_driver_unregister(info->driver);
 458         }
 459 }
 460
 461 static int exynos_drm_register_drivers(void)
 462 {
 463         int i, ret;
 464
 465         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 466                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 467
 468                 if (!info->driver)
 469                         continue;
 470
 471                 ret = platform_driver_register(info->driver);
 472                 if (ret)
 473                         goto fail;
 474         }
 475         return 0;
 476 fail:
 477         exynos_drm_unregister_drivers();
 478         return ret;
 479 }
 480
 481 static int exynos_drm_init(void)
 482 {
 483         int ret;
 484
 485         ret = exynos_drm_register_devices();
 486         if (ret)
 487                 return ret;
 488
 489         ret = exynos_drm_register_drivers();
 490         if (ret)
 491                 goto err_unregister_pdevs;
 492
 493         return 0;
 494
 495 err_unregister_pdevs:
 496         exynos_drm_unregister_devices();
 497
 498         return ret;
 499 }
 500
 501 static void exynos_drm_exit(void)
 502 {
 503         exynos_drm_unregister_drivers();
 504         exynos_drm_unregister_devices();
 505 }
 506
 507 module_init(exynos_drm_init);
 508 module_exit(exynos_drm_exit);
 509
 510 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 511 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 512 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 513 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 514 MODULE_LICENSE("GPL");