1 /* 2 * Copyright (c) 2011 Samsung Electronics Co., Ltd. 3 * Authors: 4 * Inki Dae <inki.dae@samsung.com> 5 * Joonyoung Shim <jy0922.shim@samsung.com> 6 * Seung-Woo Kim <sw0312.kim@samsung.com> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14 #include <linux/pm_runtime.h> 15 #include <drm/drmP.h> 16 #include <drm/drm_atomic.h> 17 #include <drm/drm_atomic_helper.h> 18 #include <drm/drm_crtc_helper.h> 19 #include <drm/drm_fb_helper.h> 20 21 #include <linux/component.h> 22 23 #include <drm/exynos_drm.h> 24 25 #include "exynos_drm_drv.h" 26 #include "exynos_drm_fbdev.h" 27 #include "exynos_drm_fb.h" 28 #include "exynos_drm_gem.h" 29 #include "exynos_drm_plane.h" 30 #include "exynos_drm_ipp.h" 31 #include "exynos_drm_vidi.h" 32 #include "exynos_drm_g2d.h" 33 #include "exynos_drm_iommu.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 vm_operations_struct exynos_drm_gem_vm_ops = { 78 .fault = exynos_drm_gem_fault, 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_AUTH | DRM_RENDER_ALLOW), 86 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl, 87 DRM_AUTH | 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_AUTH | DRM_RENDER_ALLOW), 94 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl, 95 DRM_AUTH | DRM_RENDER_ALLOW), 96 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl, 97 DRM_AUTH | DRM_RENDER_ALLOW), 98 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES, 99 exynos_drm_ipp_get_res_ioctl, 100 DRM_AUTH | DRM_RENDER_ALLOW), 101 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl, 102 DRM_AUTH | DRM_RENDER_ALLOW), 103 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS, 104 exynos_drm_ipp_get_limits_ioctl, 105 DRM_AUTH | DRM_RENDER_ALLOW), 106 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl, 107 DRM_AUTH | 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 | DRIVER_PRIME 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_export = drm_gem_prime_export, 133 .gem_prime_import = exynos_drm_gem_prime_import, 134 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table, 135 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table, 136 .gem_prime_vmap = exynos_drm_gem_prime_vmap, 137 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap, 138 .gem_prime_mmap = exynos_drm_gem_prime_mmap, 139 .ioctls = exynos_ioctls, 140 .num_ioctls = ARRAY_SIZE(exynos_ioctls), 141 .fops = &exynos_drm_driver_fops, 142 .name = DRIVER_NAME, 143 .desc = DRIVER_DESC, 144 .date = DRIVER_DATE, 145 .major = DRIVER_MAJOR, 146 .minor = DRIVER_MINOR, 147 }; 148 149 static int exynos_drm_suspend(struct device *dev) 150 { 151 struct drm_device *drm_dev = dev_get_drvdata(dev); 152 153 return drm_mode_config_helper_suspend(drm_dev); 154 } 155 156 static void exynos_drm_resume(struct device *dev) 157 { 158 struct drm_device *drm_dev = dev_get_drvdata(dev); 159 160 drm_mode_config_helper_resume(drm_dev); 161 } 162 163 static const struct dev_pm_ops exynos_drm_pm_ops = { 164 .prepare = exynos_drm_suspend, 165 .complete = exynos_drm_resume, 166 }; 167 168 /* forward declaration */ 169 static struct platform_driver exynos_drm_platform_driver; 170 171 struct exynos_drm_driver_info { 172 struct platform_driver *driver; 173 unsigned int flags; 174 }; 175 176 #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */ 177 #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */ 178 #define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */ 179 #define DRM_FIMC_DEVICE BIT(3) /* devices shared with V4L2 subsystem */ 180 181 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL) 182 183 /* 184 * Connector drivers should not be placed before associated crtc drivers, 185 * because connector requires pipe number of its crtc during initialization. 186 */ 187 static struct exynos_drm_driver_info exynos_drm_drivers[] = { 188 { 189 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD), 190 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 191 }, { 192 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON), 193 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 194 }, { 195 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON), 196 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 197 }, { 198 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER), 199 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 200 }, { 201 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC), 202 DRM_COMPONENT_DRIVER 203 }, { 204 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP), 205 DRM_COMPONENT_DRIVER 206 }, { 207 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI), 208 DRM_COMPONENT_DRIVER 209 }, { 210 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI), 211 DRM_COMPONENT_DRIVER 212 }, { 213 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI), 214 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE 215 }, { 216 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D), 217 DRM_COMPONENT_DRIVER 218 }, { 219 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC), 220 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE, 221 }, { 222 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR), 223 DRM_COMPONENT_DRIVER 224 }, { 225 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER), 226 DRM_COMPONENT_DRIVER 227 }, { 228 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC), 229 DRM_COMPONENT_DRIVER 230 }, { 231 &exynos_drm_platform_driver, 232 DRM_VIRTUAL_DEVICE 233 } 234 }; 235 236 static int compare_dev(struct device *dev, void *data) 237 { 238 return dev == (struct device *)data; 239 } 240 241 static struct component_match *exynos_drm_match_add(struct device *dev) 242 { 243 struct component_match *match = NULL; 244 int i; 245 246 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 247 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 248 struct device *p = NULL, *d; 249 250 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER)) 251 continue; 252 253 while ((d = bus_find_device(&platform_bus_type, p, 254 &info->driver->driver, 255 (void *)platform_bus_type.match))) { 256 put_device(p); 257 258 if (!(info->flags & DRM_FIMC_DEVICE) || 259 exynos_drm_check_fimc_device(d) == 0) 260 component_match_add(dev, &match, 261 compare_dev, d); 262 p = d; 263 } 264 put_device(p); 265 } 266 267 return match ?: ERR_PTR(-ENODEV); 268 } 269 270 static struct device *exynos_drm_get_dma_device(void) 271 { 272 int i; 273 274 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 275 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 276 struct device *dev; 277 278 if (!info->driver || !(info->flags & DRM_DMA_DEVICE)) 279 continue; 280 281 while ((dev = bus_find_device(&platform_bus_type, NULL, 282 &info->driver->driver, 283 (void *)platform_bus_type.match))) { 284 put_device(dev); 285 return dev; 286 } 287 } 288 return NULL; 289 } 290 291 static int exynos_drm_bind(struct device *dev) 292 { 293 struct exynos_drm_private *private; 294 struct drm_encoder *encoder; 295 struct drm_device *drm; 296 unsigned int clone_mask; 297 int cnt, ret; 298 299 drm = drm_dev_alloc(&exynos_drm_driver, dev); 300 if (IS_ERR(drm)) 301 return PTR_ERR(drm); 302 303 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 304 if (!private) { 305 ret = -ENOMEM; 306 goto err_free_drm; 307 } 308 309 init_waitqueue_head(&private->wait); 310 spin_lock_init(&private->lock); 311 312 dev_set_drvdata(dev, drm); 313 drm->dev_private = (void *)private; 314 315 /* the first real CRTC device is used for all dma mapping operations */ 316 private->dma_dev = exynos_drm_get_dma_device(); 317 if (!private->dma_dev) { 318 DRM_ERROR("no device found for DMA mapping operations.\n"); 319 ret = -ENODEV; 320 goto err_free_private; 321 } 322 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n", 323 dev_name(private->dma_dev)); 324 325 /* create common IOMMU mapping for all devices attached to Exynos DRM */ 326 ret = drm_create_iommu_mapping(drm); 327 if (ret < 0) { 328 DRM_ERROR("failed to create iommu mapping.\n"); 329 goto err_free_private; 330 } 331 332 drm_mode_config_init(drm); 333 334 exynos_drm_mode_config_init(drm); 335 336 /* setup possible_clones. */ 337 cnt = 0; 338 clone_mask = 0; 339 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 340 clone_mask |= (1 << (cnt++)); 341 342 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 343 encoder->possible_clones = clone_mask; 344 345 /* Try to bind all sub drivers. */ 346 ret = component_bind_all(drm->dev, drm); 347 if (ret) 348 goto err_mode_config_cleanup; 349 350 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 351 if (ret) 352 goto err_unbind_all; 353 354 drm_mode_config_reset(drm); 355 356 /* 357 * enable drm irq mode. 358 * - with irq_enabled = true, we can use the vblank feature. 359 * 360 * P.S. note that we wouldn't use drm irq handler but 361 * just specific driver own one instead because 362 * drm framework supports only one irq handler. 363 */ 364 drm->irq_enabled = true; 365 366 /* init kms poll for handling hpd */ 367 drm_kms_helper_poll_init(drm); 368 369 ret = exynos_drm_fbdev_init(drm); 370 if (ret) 371 goto err_cleanup_poll; 372 373 /* register the DRM device */ 374 ret = drm_dev_register(drm, 0); 375 if (ret < 0) 376 goto err_cleanup_fbdev; 377 378 return 0; 379 380 err_cleanup_fbdev: 381 exynos_drm_fbdev_fini(drm); 382 err_cleanup_poll: 383 drm_kms_helper_poll_fini(drm); 384 err_unbind_all: 385 component_unbind_all(drm->dev, drm); 386 err_mode_config_cleanup: 387 drm_mode_config_cleanup(drm); 388 drm_release_iommu_mapping(drm); 389 err_free_private: 390 kfree(private); 391 err_free_drm: 392 drm_dev_put(drm); 393 394 return ret; 395 } 396 397 static void exynos_drm_unbind(struct device *dev) 398 { 399 struct drm_device *drm = dev_get_drvdata(dev); 400 401 drm_dev_unregister(drm); 402 403 exynos_drm_fbdev_fini(drm); 404 drm_kms_helper_poll_fini(drm); 405 406 component_unbind_all(drm->dev, drm); 407 drm_mode_config_cleanup(drm); 408 drm_release_iommu_mapping(drm); 409 410 kfree(drm->dev_private); 411 drm->dev_private = NULL; 412 dev_set_drvdata(dev, NULL); 413 414 drm_dev_put(drm); 415 } 416 417 static const struct component_master_ops exynos_drm_ops = { 418 .bind = exynos_drm_bind, 419 .unbind = exynos_drm_unbind, 420 }; 421 422 static int exynos_drm_platform_probe(struct platform_device *pdev) 423 { 424 struct component_match *match; 425 426 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 427 428 match = exynos_drm_match_add(&pdev->dev); 429 if (IS_ERR(match)) 430 return PTR_ERR(match); 431 432 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 433 match); 434 } 435 436 static int exynos_drm_platform_remove(struct platform_device *pdev) 437 { 438 component_master_del(&pdev->dev, &exynos_drm_ops); 439 return 0; 440 } 441 442 static struct platform_driver exynos_drm_platform_driver = { 443 .probe = exynos_drm_platform_probe, 444 .remove = exynos_drm_platform_remove, 445 .driver = { 446 .name = "exynos-drm", 447 .pm = &exynos_drm_pm_ops, 448 }, 449 }; 450 451 static void exynos_drm_unregister_devices(void) 452 { 453 int i; 454 455 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 456 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 457 struct device *dev; 458 459 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 460 continue; 461 462 while ((dev = bus_find_device(&platform_bus_type, NULL, 463 &info->driver->driver, 464 (void *)platform_bus_type.match))) { 465 put_device(dev); 466 platform_device_unregister(to_platform_device(dev)); 467 } 468 } 469 } 470 471 static int exynos_drm_register_devices(void) 472 { 473 struct platform_device *pdev; 474 int i; 475 476 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 477 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 478 479 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 480 continue; 481 482 pdev = platform_device_register_simple( 483 info->driver->driver.name, -1, NULL, 0); 484 if (IS_ERR(pdev)) 485 goto fail; 486 } 487 488 return 0; 489 fail: 490 exynos_drm_unregister_devices(); 491 return PTR_ERR(pdev); 492 } 493 494 static void exynos_drm_unregister_drivers(void) 495 { 496 int i; 497 498 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 499 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 500 501 if (!info->driver) 502 continue; 503 504 platform_driver_unregister(info->driver); 505 } 506 } 507 508 static int exynos_drm_register_drivers(void) 509 { 510 int i, ret; 511 512 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 513 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 514 515 if (!info->driver) 516 continue; 517 518 ret = platform_driver_register(info->driver); 519 if (ret) 520 goto fail; 521 } 522 return 0; 523 fail: 524 exynos_drm_unregister_drivers(); 525 return ret; 526 } 527 528 static int exynos_drm_init(void) 529 { 530 int ret; 531 532 ret = exynos_drm_register_devices(); 533 if (ret) 534 return ret; 535 536 ret = exynos_drm_register_drivers(); 537 if (ret) 538 goto err_unregister_pdevs; 539 540 return 0; 541 542 err_unregister_pdevs: 543 exynos_drm_unregister_devices(); 544 545 return ret; 546 } 547 548 static void exynos_drm_exit(void) 549 { 550 exynos_drm_unregister_drivers(); 551 exynos_drm_unregister_devices(); 552 } 553 554 module_init(exynos_drm_init); 555 module_exit(exynos_drm_exit); 556 557 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 558 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 559 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 560 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 561 MODULE_LICENSE("GPL"); 562