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 = platform_find_device_by_driver(p, &info->driver->driver))) { 246 put_device(p); 247 248 if (!(info->flags & DRM_FIMC_DEVICE) || 249 exynos_drm_check_fimc_device(d) == 0) 250 component_match_add(dev, &match, 251 compare_dev, d); 252 p = d; 253 } 254 put_device(p); 255 } 256 257 return match ?: ERR_PTR(-ENODEV); 258 } 259 260 static int exynos_drm_bind(struct device *dev) 261 { 262 struct exynos_drm_private *private; 263 struct drm_encoder *encoder; 264 struct drm_device *drm; 265 unsigned int clone_mask; 266 int cnt, ret; 267 268 drm = drm_dev_alloc(&exynos_drm_driver, dev); 269 if (IS_ERR(drm)) 270 return PTR_ERR(drm); 271 272 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 273 if (!private) { 274 ret = -ENOMEM; 275 goto err_free_drm; 276 } 277 278 init_waitqueue_head(&private->wait); 279 spin_lock_init(&private->lock); 280 281 dev_set_drvdata(dev, drm); 282 drm->dev_private = (void *)private; 283 284 drm_mode_config_init(drm); 285 286 exynos_drm_mode_config_init(drm); 287 288 /* setup possible_clones. */ 289 cnt = 0; 290 clone_mask = 0; 291 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 292 clone_mask |= (1 << (cnt++)); 293 294 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 295 encoder->possible_clones = clone_mask; 296 297 /* Try to bind all sub drivers. */ 298 ret = component_bind_all(drm->dev, drm); 299 if (ret) 300 goto err_mode_config_cleanup; 301 302 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 303 if (ret) 304 goto err_unbind_all; 305 306 drm_mode_config_reset(drm); 307 308 /* 309 * enable drm irq mode. 310 * - with irq_enabled = true, we can use the vblank feature. 311 * 312 * P.S. note that we wouldn't use drm irq handler but 313 * just specific driver own one instead because 314 * drm framework supports only one irq handler. 315 */ 316 drm->irq_enabled = true; 317 318 /* init kms poll for handling hpd */ 319 drm_kms_helper_poll_init(drm); 320 321 ret = exynos_drm_fbdev_init(drm); 322 if (ret) 323 goto err_cleanup_poll; 324 325 /* register the DRM device */ 326 ret = drm_dev_register(drm, 0); 327 if (ret < 0) 328 goto err_cleanup_fbdev; 329 330 return 0; 331 332 err_cleanup_fbdev: 333 exynos_drm_fbdev_fini(drm); 334 err_cleanup_poll: 335 drm_kms_helper_poll_fini(drm); 336 err_unbind_all: 337 component_unbind_all(drm->dev, drm); 338 err_mode_config_cleanup: 339 drm_mode_config_cleanup(drm); 340 exynos_drm_cleanup_dma(drm); 341 kfree(private); 342 err_free_drm: 343 drm_dev_put(drm); 344 345 return ret; 346 } 347 348 static void exynos_drm_unbind(struct device *dev) 349 { 350 struct drm_device *drm = dev_get_drvdata(dev); 351 352 drm_dev_unregister(drm); 353 354 exynos_drm_fbdev_fini(drm); 355 drm_kms_helper_poll_fini(drm); 356 357 component_unbind_all(drm->dev, drm); 358 drm_mode_config_cleanup(drm); 359 exynos_drm_cleanup_dma(drm); 360 361 kfree(drm->dev_private); 362 drm->dev_private = NULL; 363 dev_set_drvdata(dev, NULL); 364 365 drm_dev_put(drm); 366 } 367 368 static const struct component_master_ops exynos_drm_ops = { 369 .bind = exynos_drm_bind, 370 .unbind = exynos_drm_unbind, 371 }; 372 373 static int exynos_drm_platform_probe(struct platform_device *pdev) 374 { 375 struct component_match *match; 376 377 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 378 379 match = exynos_drm_match_add(&pdev->dev); 380 if (IS_ERR(match)) 381 return PTR_ERR(match); 382 383 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 384 match); 385 } 386 387 static int exynos_drm_platform_remove(struct platform_device *pdev) 388 { 389 component_master_del(&pdev->dev, &exynos_drm_ops); 390 return 0; 391 } 392 393 static struct platform_driver exynos_drm_platform_driver = { 394 .probe = exynos_drm_platform_probe, 395 .remove = exynos_drm_platform_remove, 396 .driver = { 397 .name = "exynos-drm", 398 .pm = &exynos_drm_pm_ops, 399 }, 400 }; 401 402 static void exynos_drm_unregister_devices(void) 403 { 404 int i; 405 406 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 407 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 408 struct device *dev; 409 410 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 411 continue; 412 413 while ((dev = platform_find_device_by_driver(NULL, 414 &info->driver->driver))) { 415 put_device(dev); 416 platform_device_unregister(to_platform_device(dev)); 417 } 418 } 419 } 420 421 static int exynos_drm_register_devices(void) 422 { 423 struct platform_device *pdev; 424 int i; 425 426 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 427 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 428 429 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 430 continue; 431 432 pdev = platform_device_register_simple( 433 info->driver->driver.name, -1, NULL, 0); 434 if (IS_ERR(pdev)) 435 goto fail; 436 } 437 438 return 0; 439 fail: 440 exynos_drm_unregister_devices(); 441 return PTR_ERR(pdev); 442 } 443 444 static void exynos_drm_unregister_drivers(void) 445 { 446 int i; 447 448 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 449 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 450 451 if (!info->driver) 452 continue; 453 454 platform_driver_unregister(info->driver); 455 } 456 } 457 458 static int exynos_drm_register_drivers(void) 459 { 460 int i, ret; 461 462 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 463 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 464 465 if (!info->driver) 466 continue; 467 468 ret = platform_driver_register(info->driver); 469 if (ret) 470 goto fail; 471 } 472 return 0; 473 fail: 474 exynos_drm_unregister_drivers(); 475 return ret; 476 } 477 478 static int exynos_drm_init(void) 479 { 480 int ret; 481 482 ret = exynos_drm_register_devices(); 483 if (ret) 484 return ret; 485 486 ret = exynos_drm_register_drivers(); 487 if (ret) 488 goto err_unregister_pdevs; 489 490 return 0; 491 492 err_unregister_pdevs: 493 exynos_drm_unregister_devices(); 494 495 return ret; 496 } 497 498 static void exynos_drm_exit(void) 499 { 500 exynos_drm_unregister_drivers(); 501 exynos_drm_unregister_devices(); 502 } 503 504 module_init(exynos_drm_init); 505 module_exit(exynos_drm_exit); 506 507 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 508 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 509 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 510 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 511 MODULE_LICENSE("GPL"); 512