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 20 #include <linux/component.h> 21 22 #include <drm/exynos_drm.h> 23 24 #include "exynos_drm_drv.h" 25 #include "exynos_drm_fbdev.h" 26 #include "exynos_drm_fb.h" 27 #include "exynos_drm_gem.h" 28 #include "exynos_drm_plane.h" 29 #include "exynos_drm_vidi.h" 30 #include "exynos_drm_g2d.h" 31 #include "exynos_drm_ipp.h" 32 #include "exynos_drm_iommu.h" 33 34 #define DRIVER_NAME "exynos" 35 #define DRIVER_DESC "Samsung SoC DRM" 36 #define DRIVER_DATE "20110530" 37 #define DRIVER_MAJOR 1 38 #define DRIVER_MINOR 0 39 40 int exynos_atomic_check(struct drm_device *dev, 41 struct drm_atomic_state *state) 42 { 43 int ret; 44 45 ret = drm_atomic_helper_check_modeset(dev, state); 46 if (ret) 47 return ret; 48 49 ret = drm_atomic_normalize_zpos(dev, state); 50 if (ret) 51 return ret; 52 53 ret = drm_atomic_helper_check_planes(dev, state); 54 if (ret) 55 return ret; 56 57 return ret; 58 } 59 60 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file) 61 { 62 struct drm_exynos_file_private *file_priv; 63 int ret; 64 65 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); 66 if (!file_priv) 67 return -ENOMEM; 68 69 file->driver_priv = file_priv; 70 71 ret = exynos_drm_subdrv_open(dev, file); 72 if (ret) 73 goto err_file_priv_free; 74 75 return ret; 76 77 err_file_priv_free: 78 kfree(file_priv); 79 file->driver_priv = NULL; 80 return ret; 81 } 82 83 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file) 84 { 85 exynos_drm_subdrv_close(dev, file); 86 kfree(file->driver_priv); 87 file->driver_priv = NULL; 88 } 89 90 static void exynos_drm_lastclose(struct drm_device *dev) 91 { 92 exynos_drm_fbdev_restore_mode(dev); 93 } 94 95 static const struct vm_operations_struct exynos_drm_gem_vm_ops = { 96 .fault = exynos_drm_gem_fault, 97 .open = drm_gem_vm_open, 98 .close = drm_gem_vm_close, 99 }; 100 101 static const struct drm_ioctl_desc exynos_ioctls[] = { 102 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl, 103 DRM_AUTH | DRM_RENDER_ALLOW), 104 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl, 105 DRM_AUTH | DRM_RENDER_ALLOW), 106 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl, 107 DRM_RENDER_ALLOW), 108 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl, 109 DRM_AUTH), 110 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl, 111 DRM_AUTH | DRM_RENDER_ALLOW), 112 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl, 113 DRM_AUTH | DRM_RENDER_ALLOW), 114 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl, 115 DRM_AUTH | DRM_RENDER_ALLOW), 116 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property, 117 DRM_AUTH | DRM_RENDER_ALLOW), 118 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property, 119 DRM_AUTH | DRM_RENDER_ALLOW), 120 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf, 121 DRM_AUTH | DRM_RENDER_ALLOW), 122 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl, 123 DRM_AUTH | DRM_RENDER_ALLOW), 124 }; 125 126 static const struct file_operations exynos_drm_driver_fops = { 127 .owner = THIS_MODULE, 128 .open = drm_open, 129 .mmap = exynos_drm_gem_mmap, 130 .poll = drm_poll, 131 .read = drm_read, 132 .unlocked_ioctl = drm_ioctl, 133 .compat_ioctl = drm_compat_ioctl, 134 .release = drm_release, 135 }; 136 137 static struct drm_driver exynos_drm_driver = { 138 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME 139 | DRIVER_ATOMIC | DRIVER_RENDER, 140 .open = exynos_drm_open, 141 .lastclose = exynos_drm_lastclose, 142 .postclose = exynos_drm_postclose, 143 .gem_free_object_unlocked = exynos_drm_gem_free_object, 144 .gem_vm_ops = &exynos_drm_gem_vm_ops, 145 .dumb_create = exynos_drm_gem_dumb_create, 146 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 147 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 148 .gem_prime_export = drm_gem_prime_export, 149 .gem_prime_import = exynos_drm_gem_prime_import, 150 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table, 151 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table, 152 .gem_prime_vmap = exynos_drm_gem_prime_vmap, 153 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap, 154 .gem_prime_mmap = exynos_drm_gem_prime_mmap, 155 .ioctls = exynos_ioctls, 156 .num_ioctls = ARRAY_SIZE(exynos_ioctls), 157 .fops = &exynos_drm_driver_fops, 158 .name = DRIVER_NAME, 159 .desc = DRIVER_DESC, 160 .date = DRIVER_DATE, 161 .major = DRIVER_MAJOR, 162 .minor = DRIVER_MINOR, 163 }; 164 165 #ifdef CONFIG_PM_SLEEP 166 static int exynos_drm_suspend(struct device *dev) 167 { 168 struct drm_device *drm_dev = dev_get_drvdata(dev); 169 struct exynos_drm_private *private; 170 171 if (pm_runtime_suspended(dev) || !drm_dev) 172 return 0; 173 174 private = drm_dev->dev_private; 175 176 drm_kms_helper_poll_disable(drm_dev); 177 exynos_drm_fbdev_suspend(drm_dev); 178 private->suspend_state = drm_atomic_helper_suspend(drm_dev); 179 if (IS_ERR(private->suspend_state)) { 180 exynos_drm_fbdev_resume(drm_dev); 181 drm_kms_helper_poll_enable(drm_dev); 182 return PTR_ERR(private->suspend_state); 183 } 184 185 return 0; 186 } 187 188 static int exynos_drm_resume(struct device *dev) 189 { 190 struct drm_device *drm_dev = dev_get_drvdata(dev); 191 struct exynos_drm_private *private; 192 193 if (pm_runtime_suspended(dev) || !drm_dev) 194 return 0; 195 196 private = drm_dev->dev_private; 197 drm_atomic_helper_resume(drm_dev, private->suspend_state); 198 exynos_drm_fbdev_resume(drm_dev); 199 drm_kms_helper_poll_enable(drm_dev); 200 201 return 0; 202 } 203 #endif 204 205 static const struct dev_pm_ops exynos_drm_pm_ops = { 206 SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume) 207 }; 208 209 /* forward declaration */ 210 static struct platform_driver exynos_drm_platform_driver; 211 212 struct exynos_drm_driver_info { 213 struct platform_driver *driver; 214 unsigned int flags; 215 }; 216 217 #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */ 218 #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */ 219 #define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */ 220 221 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL) 222 223 /* 224 * Connector drivers should not be placed before associated crtc drivers, 225 * because connector requires pipe number of its crtc during initialization. 226 */ 227 static struct exynos_drm_driver_info exynos_drm_drivers[] = { 228 { 229 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD), 230 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 231 }, { 232 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON), 233 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 234 }, { 235 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON), 236 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 237 }, { 238 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER), 239 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE 240 }, { 241 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC), 242 DRM_COMPONENT_DRIVER 243 }, { 244 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP), 245 DRM_COMPONENT_DRIVER 246 }, { 247 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI), 248 DRM_COMPONENT_DRIVER 249 }, { 250 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI), 251 DRM_COMPONENT_DRIVER 252 }, { 253 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI), 254 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE 255 }, { 256 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D), 257 }, { 258 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC), 259 }, { 260 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR), 261 }, { 262 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC), 263 }, { 264 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP), 265 DRM_VIRTUAL_DEVICE 266 }, { 267 &exynos_drm_platform_driver, 268 DRM_VIRTUAL_DEVICE 269 } 270 }; 271 272 static int compare_dev(struct device *dev, void *data) 273 { 274 return dev == (struct device *)data; 275 } 276 277 static struct component_match *exynos_drm_match_add(struct device *dev) 278 { 279 struct component_match *match = NULL; 280 int i; 281 282 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 283 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 284 struct device *p = NULL, *d; 285 286 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER)) 287 continue; 288 289 while ((d = bus_find_device(&platform_bus_type, p, 290 &info->driver->driver, 291 (void *)platform_bus_type.match))) { 292 put_device(p); 293 component_match_add(dev, &match, compare_dev, d); 294 p = d; 295 } 296 put_device(p); 297 } 298 299 return match ?: ERR_PTR(-ENODEV); 300 } 301 302 static struct device *exynos_drm_get_dma_device(void) 303 { 304 int i; 305 306 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 307 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 308 struct device *dev; 309 310 if (!info->driver || !(info->flags & DRM_DMA_DEVICE)) 311 continue; 312 313 while ((dev = bus_find_device(&platform_bus_type, NULL, 314 &info->driver->driver, 315 (void *)platform_bus_type.match))) { 316 put_device(dev); 317 return dev; 318 } 319 } 320 return NULL; 321 } 322 323 static int exynos_drm_bind(struct device *dev) 324 { 325 struct exynos_drm_private *private; 326 struct drm_encoder *encoder; 327 struct drm_device *drm; 328 unsigned int clone_mask; 329 int cnt, ret; 330 331 drm = drm_dev_alloc(&exynos_drm_driver, dev); 332 if (IS_ERR(drm)) 333 return PTR_ERR(drm); 334 335 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 336 if (!private) { 337 ret = -ENOMEM; 338 goto err_free_drm; 339 } 340 341 init_waitqueue_head(&private->wait); 342 spin_lock_init(&private->lock); 343 344 dev_set_drvdata(dev, drm); 345 drm->dev_private = (void *)private; 346 347 /* the first real CRTC device is used for all dma mapping operations */ 348 private->dma_dev = exynos_drm_get_dma_device(); 349 if (!private->dma_dev) { 350 DRM_ERROR("no device found for DMA mapping operations.\n"); 351 ret = -ENODEV; 352 goto err_free_private; 353 } 354 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n", 355 dev_name(private->dma_dev)); 356 357 /* create common IOMMU mapping for all devices attached to Exynos DRM */ 358 ret = drm_create_iommu_mapping(drm); 359 if (ret < 0) { 360 DRM_ERROR("failed to create iommu mapping.\n"); 361 goto err_free_private; 362 } 363 364 drm_mode_config_init(drm); 365 366 exynos_drm_mode_config_init(drm); 367 368 /* setup possible_clones. */ 369 cnt = 0; 370 clone_mask = 0; 371 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 372 clone_mask |= (1 << (cnt++)); 373 374 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 375 encoder->possible_clones = clone_mask; 376 377 /* Try to bind all sub drivers. */ 378 ret = component_bind_all(drm->dev, drm); 379 if (ret) 380 goto err_mode_config_cleanup; 381 382 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 383 if (ret) 384 goto err_unbind_all; 385 386 /* Probe non kms sub drivers and virtual display driver. */ 387 ret = exynos_drm_device_subdrv_probe(drm); 388 if (ret) 389 goto err_unbind_all; 390 391 drm_mode_config_reset(drm); 392 393 /* 394 * enable drm irq mode. 395 * - with irq_enabled = true, we can use the vblank feature. 396 * 397 * P.S. note that we wouldn't use drm irq handler but 398 * just specific driver own one instead because 399 * drm framework supports only one irq handler. 400 */ 401 drm->irq_enabled = true; 402 403 /* init kms poll for handling hpd */ 404 drm_kms_helper_poll_init(drm); 405 406 ret = exynos_drm_fbdev_init(drm); 407 if (ret) 408 goto err_cleanup_poll; 409 410 /* register the DRM device */ 411 ret = drm_dev_register(drm, 0); 412 if (ret < 0) 413 goto err_cleanup_fbdev; 414 415 return 0; 416 417 err_cleanup_fbdev: 418 exynos_drm_fbdev_fini(drm); 419 err_cleanup_poll: 420 drm_kms_helper_poll_fini(drm); 421 exynos_drm_device_subdrv_remove(drm); 422 err_unbind_all: 423 component_unbind_all(drm->dev, drm); 424 err_mode_config_cleanup: 425 drm_mode_config_cleanup(drm); 426 drm_release_iommu_mapping(drm); 427 err_free_private: 428 kfree(private); 429 err_free_drm: 430 drm_dev_unref(drm); 431 432 return ret; 433 } 434 435 static void exynos_drm_unbind(struct device *dev) 436 { 437 struct drm_device *drm = dev_get_drvdata(dev); 438 439 drm_dev_unregister(drm); 440 441 exynos_drm_device_subdrv_remove(drm); 442 443 exynos_drm_fbdev_fini(drm); 444 drm_kms_helper_poll_fini(drm); 445 446 component_unbind_all(drm->dev, drm); 447 drm_mode_config_cleanup(drm); 448 drm_release_iommu_mapping(drm); 449 450 kfree(drm->dev_private); 451 drm->dev_private = NULL; 452 dev_set_drvdata(dev, NULL); 453 454 drm_dev_unref(drm); 455 } 456 457 static const struct component_master_ops exynos_drm_ops = { 458 .bind = exynos_drm_bind, 459 .unbind = exynos_drm_unbind, 460 }; 461 462 static int exynos_drm_platform_probe(struct platform_device *pdev) 463 { 464 struct component_match *match; 465 466 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 467 468 match = exynos_drm_match_add(&pdev->dev); 469 if (IS_ERR(match)) 470 return PTR_ERR(match); 471 472 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 473 match); 474 } 475 476 static int exynos_drm_platform_remove(struct platform_device *pdev) 477 { 478 component_master_del(&pdev->dev, &exynos_drm_ops); 479 return 0; 480 } 481 482 static struct platform_driver exynos_drm_platform_driver = { 483 .probe = exynos_drm_platform_probe, 484 .remove = exynos_drm_platform_remove, 485 .driver = { 486 .name = "exynos-drm", 487 .pm = &exynos_drm_pm_ops, 488 }, 489 }; 490 491 static void exynos_drm_unregister_devices(void) 492 { 493 int i; 494 495 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 496 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 497 struct device *dev; 498 499 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 500 continue; 501 502 while ((dev = bus_find_device(&platform_bus_type, NULL, 503 &info->driver->driver, 504 (void *)platform_bus_type.match))) { 505 put_device(dev); 506 platform_device_unregister(to_platform_device(dev)); 507 } 508 } 509 } 510 511 static int exynos_drm_register_devices(void) 512 { 513 struct platform_device *pdev; 514 int i; 515 516 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 517 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 518 519 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 520 continue; 521 522 pdev = platform_device_register_simple( 523 info->driver->driver.name, -1, NULL, 0); 524 if (IS_ERR(pdev)) 525 goto fail; 526 } 527 528 return 0; 529 fail: 530 exynos_drm_unregister_devices(); 531 return PTR_ERR(pdev); 532 } 533 534 static void exynos_drm_unregister_drivers(void) 535 { 536 int i; 537 538 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 539 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 540 541 if (!info->driver) 542 continue; 543 544 platform_driver_unregister(info->driver); 545 } 546 } 547 548 static int exynos_drm_register_drivers(void) 549 { 550 int i, ret; 551 552 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 553 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 554 555 if (!info->driver) 556 continue; 557 558 ret = platform_driver_register(info->driver); 559 if (ret) 560 goto fail; 561 } 562 return 0; 563 fail: 564 exynos_drm_unregister_drivers(); 565 return ret; 566 } 567 568 static int exynos_drm_init(void) 569 { 570 int ret; 571 572 ret = exynos_drm_register_devices(); 573 if (ret) 574 return ret; 575 576 ret = exynos_drm_register_drivers(); 577 if (ret) 578 goto err_unregister_pdevs; 579 580 return 0; 581 582 err_unregister_pdevs: 583 exynos_drm_unregister_devices(); 584 585 return ret; 586 } 587 588 static void exynos_drm_exit(void) 589 { 590 exynos_drm_unregister_drivers(); 591 exynos_drm_unregister_devices(); 592 } 593 594 module_init(exynos_drm_init); 595 module_exit(exynos_drm_exit); 596 597 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 598 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 599 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 600 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 601 MODULE_LICENSE("GPL"); 602