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_fb_helper.h> 19 #include <drm/drm_probe_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 34 #define DRIVER_NAME "exynos" 35 #define DRIVER_DESC "Samsung SoC DRM" 36 #define DRIVER_DATE "20180330" 37 38 /* 39 * Interface history: 40 * 41 * 1.0 - Original version 42 * 1.1 - Upgrade IPP driver to version 2.0 43 */ 44 #define DRIVER_MAJOR 1 45 #define DRIVER_MINOR 1 46 47 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file) 48 { 49 struct drm_exynos_file_private *file_priv; 50 int ret; 51 52 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); 53 if (!file_priv) 54 return -ENOMEM; 55 56 file->driver_priv = file_priv; 57 ret = g2d_open(dev, file); 58 if (ret) 59 goto err_file_priv_free; 60 61 return ret; 62 63 err_file_priv_free: 64 kfree(file_priv); 65 file->driver_priv = NULL; 66 return ret; 67 } 68 69 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file) 70 { 71 g2d_close(dev, file); 72 kfree(file->driver_priv); 73 file->driver_priv = NULL; 74 } 75 76 static const struct vm_operations_struct exynos_drm_gem_vm_ops = { 77 .fault = exynos_drm_gem_fault, 78 .open = drm_gem_vm_open, 79 .close = drm_gem_vm_close, 80 }; 81 82 static const struct drm_ioctl_desc exynos_ioctls[] = { 83 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl, 84 DRM_AUTH | DRM_RENDER_ALLOW), 85 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl, 86 DRM_AUTH | DRM_RENDER_ALLOW), 87 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl, 88 DRM_RENDER_ALLOW), 89 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl, 90 DRM_AUTH), 91 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl, 92 DRM_AUTH | DRM_RENDER_ALLOW), 93 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl, 94 DRM_AUTH | DRM_RENDER_ALLOW), 95 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl, 96 DRM_AUTH | DRM_RENDER_ALLOW), 97 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES, 98 exynos_drm_ipp_get_res_ioctl, 99 DRM_AUTH | DRM_RENDER_ALLOW), 100 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl, 101 DRM_AUTH | DRM_RENDER_ALLOW), 102 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS, 103 exynos_drm_ipp_get_limits_ioctl, 104 DRM_AUTH | DRM_RENDER_ALLOW), 105 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl, 106 DRM_AUTH | DRM_RENDER_ALLOW), 107 }; 108 109 static const struct file_operations exynos_drm_driver_fops = { 110 .owner = THIS_MODULE, 111 .open = drm_open, 112 .mmap = exynos_drm_gem_mmap, 113 .poll = drm_poll, 114 .read = drm_read, 115 .unlocked_ioctl = drm_ioctl, 116 .compat_ioctl = drm_compat_ioctl, 117 .release = drm_release, 118 }; 119 120 static struct drm_driver exynos_drm_driver = { 121 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME 122 | DRIVER_ATOMIC | DRIVER_RENDER, 123 .open = exynos_drm_open, 124 .lastclose = drm_fb_helper_lastclose, 125 .postclose = exynos_drm_postclose, 126 .gem_free_object_unlocked = exynos_drm_gem_free_object, 127 .gem_vm_ops = &exynos_drm_gem_vm_ops, 128 .dumb_create = exynos_drm_gem_dumb_create, 129 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 130 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 131 .gem_prime_export = drm_gem_prime_export, 132 .gem_prime_import = exynos_drm_gem_prime_import, 133 .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table, 134 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table, 135 .gem_prime_vmap = exynos_drm_gem_prime_vmap, 136 .gem_prime_vunmap = exynos_drm_gem_prime_vunmap, 137 .gem_prime_mmap = exynos_drm_gem_prime_mmap, 138 .ioctls = exynos_ioctls, 139 .num_ioctls = ARRAY_SIZE(exynos_ioctls), 140 .fops = &exynos_drm_driver_fops, 141 .name = DRIVER_NAME, 142 .desc = DRIVER_DESC, 143 .date = DRIVER_DATE, 144 .major = DRIVER_MAJOR, 145 .minor = DRIVER_MINOR, 146 }; 147 148 static int exynos_drm_suspend(struct device *dev) 149 { 150 struct drm_device *drm_dev = dev_get_drvdata(dev); 151 152 return drm_mode_config_helper_suspend(drm_dev); 153 } 154 155 static void exynos_drm_resume(struct device *dev) 156 { 157 struct drm_device *drm_dev = dev_get_drvdata(dev); 158 159 drm_mode_config_helper_resume(drm_dev); 160 } 161 162 static const struct dev_pm_ops exynos_drm_pm_ops = { 163 .prepare = exynos_drm_suspend, 164 .complete = exynos_drm_resume, 165 }; 166 167 /* forward declaration */ 168 static struct platform_driver exynos_drm_platform_driver; 169 170 struct exynos_drm_driver_info { 171 struct platform_driver *driver; 172 unsigned int flags; 173 }; 174 175 #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */ 176 #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */ 177 #define DRM_FIMC_DEVICE BIT(2) /* devices shared with V4L2 subsystem */ 178 179 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL) 180 181 /* 182 * Connector drivers should not be placed before associated crtc drivers, 183 * because connector requires pipe number of its crtc during initialization. 184 */ 185 static struct exynos_drm_driver_info exynos_drm_drivers[] = { 186 { 187 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD), 188 DRM_COMPONENT_DRIVER 189 }, { 190 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON), 191 DRM_COMPONENT_DRIVER 192 }, { 193 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON), 194 DRM_COMPONENT_DRIVER 195 }, { 196 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER), 197 DRM_COMPONENT_DRIVER 198 }, { 199 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC), 200 DRM_COMPONENT_DRIVER 201 }, { 202 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP), 203 DRM_COMPONENT_DRIVER 204 }, { 205 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI), 206 DRM_COMPONENT_DRIVER 207 }, { 208 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI), 209 DRM_COMPONENT_DRIVER 210 }, { 211 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI), 212 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE 213 }, { 214 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D), 215 DRM_COMPONENT_DRIVER 216 }, { 217 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC), 218 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE, 219 }, { 220 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR), 221 DRM_COMPONENT_DRIVER 222 }, { 223 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER), 224 DRM_COMPONENT_DRIVER 225 }, { 226 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC), 227 DRM_COMPONENT_DRIVER 228 }, { 229 &exynos_drm_platform_driver, 230 DRM_VIRTUAL_DEVICE 231 } 232 }; 233 234 static int compare_dev(struct device *dev, void *data) 235 { 236 return dev == (struct device *)data; 237 } 238 239 static struct component_match *exynos_drm_match_add(struct device *dev) 240 { 241 struct component_match *match = NULL; 242 int i; 243 244 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 245 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 246 struct device *p = NULL, *d; 247 248 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER)) 249 continue; 250 251 while ((d = bus_find_device(&platform_bus_type, p, 252 &info->driver->driver, 253 (void *)platform_bus_type.match))) { 254 put_device(p); 255 256 if (!(info->flags & DRM_FIMC_DEVICE) || 257 exynos_drm_check_fimc_device(d) == 0) 258 component_match_add(dev, &match, 259 compare_dev, d); 260 p = d; 261 } 262 put_device(p); 263 } 264 265 return match ?: ERR_PTR(-ENODEV); 266 } 267 268 static int exynos_drm_bind(struct device *dev) 269 { 270 struct exynos_drm_private *private; 271 struct drm_encoder *encoder; 272 struct drm_device *drm; 273 unsigned int clone_mask; 274 int cnt, ret; 275 276 drm = drm_dev_alloc(&exynos_drm_driver, dev); 277 if (IS_ERR(drm)) 278 return PTR_ERR(drm); 279 280 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 281 if (!private) { 282 ret = -ENOMEM; 283 goto err_free_drm; 284 } 285 286 init_waitqueue_head(&private->wait); 287 spin_lock_init(&private->lock); 288 289 dev_set_drvdata(dev, drm); 290 drm->dev_private = (void *)private; 291 292 drm_mode_config_init(drm); 293 294 exynos_drm_mode_config_init(drm); 295 296 /* setup possible_clones. */ 297 cnt = 0; 298 clone_mask = 0; 299 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 300 clone_mask |= (1 << (cnt++)); 301 302 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 303 encoder->possible_clones = clone_mask; 304 305 /* Try to bind all sub drivers. */ 306 ret = component_bind_all(drm->dev, drm); 307 if (ret) 308 goto err_mode_config_cleanup; 309 310 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 311 if (ret) 312 goto err_unbind_all; 313 314 drm_mode_config_reset(drm); 315 316 /* 317 * enable drm irq mode. 318 * - with irq_enabled = true, we can use the vblank feature. 319 * 320 * P.S. note that we wouldn't use drm irq handler but 321 * just specific driver own one instead because 322 * drm framework supports only one irq handler. 323 */ 324 drm->irq_enabled = true; 325 326 /* init kms poll for handling hpd */ 327 drm_kms_helper_poll_init(drm); 328 329 ret = exynos_drm_fbdev_init(drm); 330 if (ret) 331 goto err_cleanup_poll; 332 333 /* register the DRM device */ 334 ret = drm_dev_register(drm, 0); 335 if (ret < 0) 336 goto err_cleanup_fbdev; 337 338 return 0; 339 340 err_cleanup_fbdev: 341 exynos_drm_fbdev_fini(drm); 342 err_cleanup_poll: 343 drm_kms_helper_poll_fini(drm); 344 err_unbind_all: 345 component_unbind_all(drm->dev, drm); 346 err_mode_config_cleanup: 347 drm_mode_config_cleanup(drm); 348 exynos_drm_cleanup_dma(drm); 349 kfree(private); 350 err_free_drm: 351 drm_dev_put(drm); 352 353 return ret; 354 } 355 356 static void exynos_drm_unbind(struct device *dev) 357 { 358 struct drm_device *drm = dev_get_drvdata(dev); 359 360 drm_dev_unregister(drm); 361 362 exynos_drm_fbdev_fini(drm); 363 drm_kms_helper_poll_fini(drm); 364 365 component_unbind_all(drm->dev, drm); 366 drm_mode_config_cleanup(drm); 367 exynos_drm_cleanup_dma(drm); 368 369 kfree(drm->dev_private); 370 drm->dev_private = NULL; 371 dev_set_drvdata(dev, NULL); 372 373 drm_dev_put(drm); 374 } 375 376 static const struct component_master_ops exynos_drm_ops = { 377 .bind = exynos_drm_bind, 378 .unbind = exynos_drm_unbind, 379 }; 380 381 static int exynos_drm_platform_probe(struct platform_device *pdev) 382 { 383 struct component_match *match; 384 385 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 386 387 match = exynos_drm_match_add(&pdev->dev); 388 if (IS_ERR(match)) 389 return PTR_ERR(match); 390 391 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 392 match); 393 } 394 395 static int exynos_drm_platform_remove(struct platform_device *pdev) 396 { 397 component_master_del(&pdev->dev, &exynos_drm_ops); 398 return 0; 399 } 400 401 static struct platform_driver exynos_drm_platform_driver = { 402 .probe = exynos_drm_platform_probe, 403 .remove = exynos_drm_platform_remove, 404 .driver = { 405 .name = "exynos-drm", 406 .pm = &exynos_drm_pm_ops, 407 }, 408 }; 409 410 static void exynos_drm_unregister_devices(void) 411 { 412 int i; 413 414 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 415 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 416 struct device *dev; 417 418 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 419 continue; 420 421 while ((dev = bus_find_device(&platform_bus_type, NULL, 422 &info->driver->driver, 423 (void *)platform_bus_type.match))) { 424 put_device(dev); 425 platform_device_unregister(to_platform_device(dev)); 426 } 427 } 428 } 429 430 static int exynos_drm_register_devices(void) 431 { 432 struct platform_device *pdev; 433 int i; 434 435 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 436 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 437 438 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 439 continue; 440 441 pdev = platform_device_register_simple( 442 info->driver->driver.name, -1, NULL, 0); 443 if (IS_ERR(pdev)) 444 goto fail; 445 } 446 447 return 0; 448 fail: 449 exynos_drm_unregister_devices(); 450 return PTR_ERR(pdev); 451 } 452 453 static void exynos_drm_unregister_drivers(void) 454 { 455 int i; 456 457 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 458 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 459 460 if (!info->driver) 461 continue; 462 463 platform_driver_unregister(info->driver); 464 } 465 } 466 467 static int exynos_drm_register_drivers(void) 468 { 469 int i, ret; 470 471 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 472 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 473 474 if (!info->driver) 475 continue; 476 477 ret = platform_driver_register(info->driver); 478 if (ret) 479 goto fail; 480 } 481 return 0; 482 fail: 483 exynos_drm_unregister_drivers(); 484 return ret; 485 } 486 487 static int exynos_drm_init(void) 488 { 489 int ret; 490 491 ret = exynos_drm_register_devices(); 492 if (ret) 493 return ret; 494 495 ret = exynos_drm_register_drivers(); 496 if (ret) 497 goto err_unregister_pdevs; 498 499 return 0; 500 501 err_unregister_pdevs: 502 exynos_drm_unregister_devices(); 503 504 return ret; 505 } 506 507 static void exynos_drm_exit(void) 508 { 509 exynos_drm_unregister_drivers(); 510 exynos_drm_unregister_devices(); 511 } 512 513 module_init(exynos_drm_init); 514 module_exit(exynos_drm_exit); 515 516 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 517 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 518 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 519 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 520 MODULE_LICENSE("GPL"); 521