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 struct exynos_drm_private *private; 153 154 if (!drm_dev) 155 return 0; 156 157 private = drm_dev->dev_private; 158 159 drm_kms_helper_poll_disable(drm_dev); 160 exynos_drm_fbdev_suspend(drm_dev); 161 private->suspend_state = drm_atomic_helper_suspend(drm_dev); 162 if (IS_ERR(private->suspend_state)) { 163 exynos_drm_fbdev_resume(drm_dev); 164 drm_kms_helper_poll_enable(drm_dev); 165 return PTR_ERR(private->suspend_state); 166 } 167 168 return 0; 169 } 170 171 static void exynos_drm_resume(struct device *dev) 172 { 173 struct drm_device *drm_dev = dev_get_drvdata(dev); 174 struct exynos_drm_private *private; 175 176 if (!drm_dev) 177 return; 178 179 private = drm_dev->dev_private; 180 drm_atomic_helper_resume(drm_dev, private->suspend_state); 181 exynos_drm_fbdev_resume(drm_dev); 182 drm_kms_helper_poll_enable(drm_dev); 183 } 184 185 static const struct dev_pm_ops exynos_drm_pm_ops = { 186 .prepare = exynos_drm_suspend, 187 .complete = exynos_drm_resume, 188 }; 189 190 /* forward declaration */ 191 static struct platform_driver exynos_drm_platform_driver; 192 193 struct exynos_drm_driver_info { 194 struct platform_driver *driver; 195 unsigned int flags; 196 }; 197 198 #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */ 199 #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */ 200 #define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */ 201 #define DRM_FIMC_DEVICE BIT(3) /* devices shared with V4L2 subsystem */ 202 203 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL) 204 205 /* 206 * Connector drivers should not be placed before associated crtc drivers, 207 * because connector requires pipe number of its crtc during initialization. 208 */ 209 static struct exynos_drm_driver_info exynos_drm_drivers[] = { 210 { 211 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD), 212 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 213 }, { 214 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON), 215 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 216 }, { 217 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON), 218 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 219 }, { 220 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER), 221 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 222 }, { 223 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC), 224 DRM_COMPONENT_DRIVER 225 }, { 226 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP), 227 DRM_COMPONENT_DRIVER 228 }, { 229 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI), 230 DRM_COMPONENT_DRIVER 231 }, { 232 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI), 233 DRM_COMPONENT_DRIVER 234 }, { 235 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI), 236 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE 237 }, { 238 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D), 239 DRM_COMPONENT_DRIVER 240 }, { 241 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC), 242 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE, 243 }, { 244 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR), 245 DRM_COMPONENT_DRIVER 246 }, { 247 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER), 248 DRM_COMPONENT_DRIVER 249 }, { 250 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC), 251 DRM_COMPONENT_DRIVER 252 }, { 253 &exynos_drm_platform_driver, 254 DRM_VIRTUAL_DEVICE 255 } 256 }; 257 258 static int compare_dev(struct device *dev, void *data) 259 { 260 return dev == (struct device *)data; 261 } 262 263 static struct component_match *exynos_drm_match_add(struct device *dev) 264 { 265 struct component_match *match = NULL; 266 int i; 267 268 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 269 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 270 struct device *p = NULL, *d; 271 272 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER)) 273 continue; 274 275 while ((d = bus_find_device(&platform_bus_type, p, 276 &info->driver->driver, 277 (void *)platform_bus_type.match))) { 278 put_device(p); 279 280 if (!(info->flags & DRM_FIMC_DEVICE) || 281 exynos_drm_check_fimc_device(d) == 0) 282 component_match_add(dev, &match, 283 compare_dev, d); 284 p = d; 285 } 286 put_device(p); 287 } 288 289 return match ?: ERR_PTR(-ENODEV); 290 } 291 292 static struct device *exynos_drm_get_dma_device(void) 293 { 294 int i; 295 296 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 297 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 298 struct device *dev; 299 300 if (!info->driver || !(info->flags & DRM_DMA_DEVICE)) 301 continue; 302 303 while ((dev = bus_find_device(&platform_bus_type, NULL, 304 &info->driver->driver, 305 (void *)platform_bus_type.match))) { 306 put_device(dev); 307 return dev; 308 } 309 } 310 return NULL; 311 } 312 313 static int exynos_drm_bind(struct device *dev) 314 { 315 struct exynos_drm_private *private; 316 struct drm_encoder *encoder; 317 struct drm_device *drm; 318 unsigned int clone_mask; 319 int cnt, ret; 320 321 drm = drm_dev_alloc(&exynos_drm_driver, dev); 322 if (IS_ERR(drm)) 323 return PTR_ERR(drm); 324 325 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 326 if (!private) { 327 ret = -ENOMEM; 328 goto err_free_drm; 329 } 330 331 init_waitqueue_head(&private->wait); 332 spin_lock_init(&private->lock); 333 334 dev_set_drvdata(dev, drm); 335 drm->dev_private = (void *)private; 336 337 /* the first real CRTC device is used for all dma mapping operations */ 338 private->dma_dev = exynos_drm_get_dma_device(); 339 if (!private->dma_dev) { 340 DRM_ERROR("no device found for DMA mapping operations.\n"); 341 ret = -ENODEV; 342 goto err_free_private; 343 } 344 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n", 345 dev_name(private->dma_dev)); 346 347 /* create common IOMMU mapping for all devices attached to Exynos DRM */ 348 ret = drm_create_iommu_mapping(drm); 349 if (ret < 0) { 350 DRM_ERROR("failed to create iommu mapping.\n"); 351 goto err_free_private; 352 } 353 354 drm_mode_config_init(drm); 355 356 exynos_drm_mode_config_init(drm); 357 358 /* setup possible_clones. */ 359 cnt = 0; 360 clone_mask = 0; 361 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 362 clone_mask |= (1 << (cnt++)); 363 364 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 365 encoder->possible_clones = clone_mask; 366 367 /* Try to bind all sub drivers. */ 368 ret = component_bind_all(drm->dev, drm); 369 if (ret) 370 goto err_mode_config_cleanup; 371 372 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 373 if (ret) 374 goto err_unbind_all; 375 376 drm_mode_config_reset(drm); 377 378 /* 379 * enable drm irq mode. 380 * - with irq_enabled = true, we can use the vblank feature. 381 * 382 * P.S. note that we wouldn't use drm irq handler but 383 * just specific driver own one instead because 384 * drm framework supports only one irq handler. 385 */ 386 drm->irq_enabled = true; 387 388 /* init kms poll for handling hpd */ 389 drm_kms_helper_poll_init(drm); 390 391 ret = exynos_drm_fbdev_init(drm); 392 if (ret) 393 goto err_cleanup_poll; 394 395 /* register the DRM device */ 396 ret = drm_dev_register(drm, 0); 397 if (ret < 0) 398 goto err_cleanup_fbdev; 399 400 return 0; 401 402 err_cleanup_fbdev: 403 exynos_drm_fbdev_fini(drm); 404 err_cleanup_poll: 405 drm_kms_helper_poll_fini(drm); 406 err_unbind_all: 407 component_unbind_all(drm->dev, drm); 408 err_mode_config_cleanup: 409 drm_mode_config_cleanup(drm); 410 drm_release_iommu_mapping(drm); 411 err_free_private: 412 kfree(private); 413 err_free_drm: 414 drm_dev_put(drm); 415 416 return ret; 417 } 418 419 static void exynos_drm_unbind(struct device *dev) 420 { 421 struct drm_device *drm = dev_get_drvdata(dev); 422 423 drm_dev_unregister(drm); 424 425 exynos_drm_fbdev_fini(drm); 426 drm_kms_helper_poll_fini(drm); 427 428 component_unbind_all(drm->dev, drm); 429 drm_mode_config_cleanup(drm); 430 drm_release_iommu_mapping(drm); 431 432 kfree(drm->dev_private); 433 drm->dev_private = NULL; 434 dev_set_drvdata(dev, NULL); 435 436 drm_dev_put(drm); 437 } 438 439 static const struct component_master_ops exynos_drm_ops = { 440 .bind = exynos_drm_bind, 441 .unbind = exynos_drm_unbind, 442 }; 443 444 static int exynos_drm_platform_probe(struct platform_device *pdev) 445 { 446 struct component_match *match; 447 448 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 449 450 match = exynos_drm_match_add(&pdev->dev); 451 if (IS_ERR(match)) 452 return PTR_ERR(match); 453 454 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 455 match); 456 } 457 458 static int exynos_drm_platform_remove(struct platform_device *pdev) 459 { 460 component_master_del(&pdev->dev, &exynos_drm_ops); 461 return 0; 462 } 463 464 static struct platform_driver exynos_drm_platform_driver = { 465 .probe = exynos_drm_platform_probe, 466 .remove = exynos_drm_platform_remove, 467 .driver = { 468 .name = "exynos-drm", 469 .pm = &exynos_drm_pm_ops, 470 }, 471 }; 472 473 static void exynos_drm_unregister_devices(void) 474 { 475 int i; 476 477 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 478 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 479 struct device *dev; 480 481 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 482 continue; 483 484 while ((dev = bus_find_device(&platform_bus_type, NULL, 485 &info->driver->driver, 486 (void *)platform_bus_type.match))) { 487 put_device(dev); 488 platform_device_unregister(to_platform_device(dev)); 489 } 490 } 491 } 492 493 static int exynos_drm_register_devices(void) 494 { 495 struct platform_device *pdev; 496 int i; 497 498 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 499 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 500 501 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 502 continue; 503 504 pdev = platform_device_register_simple( 505 info->driver->driver.name, -1, NULL, 0); 506 if (IS_ERR(pdev)) 507 goto fail; 508 } 509 510 return 0; 511 fail: 512 exynos_drm_unregister_devices(); 513 return PTR_ERR(pdev); 514 } 515 516 static void exynos_drm_unregister_drivers(void) 517 { 518 int i; 519 520 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 521 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 522 523 if (!info->driver) 524 continue; 525 526 platform_driver_unregister(info->driver); 527 } 528 } 529 530 static int exynos_drm_register_drivers(void) 531 { 532 int i, ret; 533 534 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 535 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 536 537 if (!info->driver) 538 continue; 539 540 ret = platform_driver_register(info->driver); 541 if (ret) 542 goto fail; 543 } 544 return 0; 545 fail: 546 exynos_drm_unregister_drivers(); 547 return ret; 548 } 549 550 static int exynos_drm_init(void) 551 { 552 int ret; 553 554 ret = exynos_drm_register_devices(); 555 if (ret) 556 return ret; 557 558 ret = exynos_drm_register_drivers(); 559 if (ret) 560 goto err_unregister_pdevs; 561 562 return 0; 563 564 err_unregister_pdevs: 565 exynos_drm_unregister_devices(); 566 567 return ret; 568 } 569 570 static void exynos_drm_exit(void) 571 { 572 exynos_drm_unregister_drivers(); 573 exynos_drm_unregister_devices(); 574 } 575 576 module_init(exynos_drm_init); 577 module_exit(exynos_drm_exit); 578 579 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 580 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 581 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 582 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 583 MODULE_LICENSE("GPL"); 584