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/dma-mapping.h> 12 #include <linux/platform_device.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/uaccess.h> 15 16 #include <drm/drm_atomic.h> 17 #include <drm/drm_atomic_helper.h> 18 #include <drm/drm_drv.h> 19 #include <drm/drm_fb_helper.h> 20 #include <drm/drm_file.h> 21 #include <drm/drm_fourcc.h> 22 #include <drm/drm_ioctl.h> 23 #include <drm/drm_probe_helper.h> 24 #include <drm/drm_vblank.h> 25 #include <drm/exynos_drm.h> 26 27 #include "exynos_drm_drv.h" 28 #include "exynos_drm_fb.h" 29 #include "exynos_drm_fbdev.h" 30 #include "exynos_drm_g2d.h" 31 #include "exynos_drm_gem.h" 32 #include "exynos_drm_ipp.h" 33 #include "exynos_drm_plane.h" 34 #include "exynos_drm_vidi.h" 35 36 #define DRIVER_NAME "exynos" 37 #define DRIVER_DESC "Samsung SoC DRM" 38 #define DRIVER_DATE "20180330" 39 40 /* 41 * Interface history: 42 * 43 * 1.0 - Original version 44 * 1.1 - Upgrade IPP driver to version 2.0 45 */ 46 #define DRIVER_MAJOR 1 47 #define DRIVER_MINOR 1 48 49 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file) 50 { 51 struct drm_exynos_file_private *file_priv; 52 int ret; 53 54 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL); 55 if (!file_priv) 56 return -ENOMEM; 57 58 file->driver_priv = file_priv; 59 ret = g2d_open(dev, file); 60 if (ret) 61 goto err_file_priv_free; 62 63 return ret; 64 65 err_file_priv_free: 66 kfree(file_priv); 67 file->driver_priv = NULL; 68 return ret; 69 } 70 71 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file) 72 { 73 g2d_close(dev, file); 74 kfree(file->driver_priv); 75 file->driver_priv = NULL; 76 } 77 78 static const struct drm_ioctl_desc exynos_ioctls[] = { 79 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl, 80 DRM_RENDER_ALLOW), 81 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl, 82 DRM_RENDER_ALLOW), 83 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl, 84 DRM_RENDER_ALLOW), 85 DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl, 86 DRM_AUTH), 87 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl, 88 DRM_RENDER_ALLOW), 89 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl, 90 DRM_RENDER_ALLOW), 91 DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl, 92 DRM_RENDER_ALLOW), 93 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES, 94 exynos_drm_ipp_get_res_ioctl, 95 DRM_RENDER_ALLOW), 96 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl, 97 DRM_RENDER_ALLOW), 98 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS, 99 exynos_drm_ipp_get_limits_ioctl, 100 DRM_RENDER_ALLOW), 101 DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl, 102 DRM_RENDER_ALLOW), 103 }; 104 105 DEFINE_DRM_GEM_FOPS(exynos_drm_driver_fops); 106 107 static const struct drm_driver exynos_drm_driver = { 108 .driver_features = DRIVER_MODESET | DRIVER_GEM 109 | DRIVER_ATOMIC | DRIVER_RENDER, 110 .open = exynos_drm_open, 111 .lastclose = drm_fb_helper_lastclose, 112 .postclose = exynos_drm_postclose, 113 .dumb_create = exynos_drm_gem_dumb_create, 114 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 115 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 116 .gem_prime_import = exynos_drm_gem_prime_import, 117 .gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table, 118 .gem_prime_mmap = drm_gem_prime_mmap, 119 .ioctls = exynos_ioctls, 120 .num_ioctls = ARRAY_SIZE(exynos_ioctls), 121 .fops = &exynos_drm_driver_fops, 122 .name = DRIVER_NAME, 123 .desc = DRIVER_DESC, 124 .date = DRIVER_DATE, 125 .major = DRIVER_MAJOR, 126 .minor = DRIVER_MINOR, 127 }; 128 129 static int exynos_drm_suspend(struct device *dev) 130 { 131 struct drm_device *drm_dev = dev_get_drvdata(dev); 132 133 return drm_mode_config_helper_suspend(drm_dev); 134 } 135 136 static void exynos_drm_resume(struct device *dev) 137 { 138 struct drm_device *drm_dev = dev_get_drvdata(dev); 139 140 drm_mode_config_helper_resume(drm_dev); 141 } 142 143 static const struct dev_pm_ops exynos_drm_pm_ops = { 144 .prepare = exynos_drm_suspend, 145 .complete = exynos_drm_resume, 146 }; 147 148 /* forward declaration */ 149 static struct platform_driver exynos_drm_platform_driver; 150 151 struct exynos_drm_driver_info { 152 struct platform_driver *driver; 153 unsigned int flags; 154 }; 155 156 #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */ 157 #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */ 158 #define DRM_FIMC_DEVICE BIT(2) /* devices shared with V4L2 subsystem */ 159 160 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL) 161 162 /* 163 * Connector drivers should not be placed before associated crtc drivers, 164 * because connector requires pipe number of its crtc during initialization. 165 */ 166 static struct exynos_drm_driver_info exynos_drm_drivers[] = { 167 { 168 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD), 169 DRM_COMPONENT_DRIVER 170 }, { 171 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON), 172 DRM_COMPONENT_DRIVER 173 }, { 174 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON), 175 DRM_COMPONENT_DRIVER 176 }, { 177 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER), 178 DRM_COMPONENT_DRIVER 179 }, { 180 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC), 181 DRM_COMPONENT_DRIVER 182 }, { 183 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP), 184 DRM_COMPONENT_DRIVER 185 }, { 186 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI), 187 DRM_COMPONENT_DRIVER 188 }, { 189 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI), 190 DRM_COMPONENT_DRIVER 191 }, { 192 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI), 193 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE 194 }, { 195 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D), 196 DRM_COMPONENT_DRIVER 197 }, { 198 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC), 199 DRM_COMPONENT_DRIVER | DRM_FIMC_DEVICE, 200 }, { 201 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR), 202 DRM_COMPONENT_DRIVER 203 }, { 204 DRV_PTR(scaler_driver, CONFIG_DRM_EXYNOS_SCALER), 205 DRM_COMPONENT_DRIVER 206 }, { 207 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC), 208 DRM_COMPONENT_DRIVER 209 }, { 210 &exynos_drm_platform_driver, 211 DRM_VIRTUAL_DEVICE 212 } 213 }; 214 215 static int compare_dev(struct device *dev, void *data) 216 { 217 return dev == (struct device *)data; 218 } 219 220 static struct component_match *exynos_drm_match_add(struct device *dev) 221 { 222 struct component_match *match = NULL; 223 int i; 224 225 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 226 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 227 struct device *p = NULL, *d; 228 229 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER)) 230 continue; 231 232 while ((d = platform_find_device_by_driver(p, &info->driver->driver))) { 233 put_device(p); 234 235 if (!(info->flags & DRM_FIMC_DEVICE) || 236 exynos_drm_check_fimc_device(d) == 0) 237 component_match_add(dev, &match, 238 compare_dev, d); 239 p = d; 240 } 241 put_device(p); 242 } 243 244 return match ?: ERR_PTR(-ENODEV); 245 } 246 247 static int exynos_drm_bind(struct device *dev) 248 { 249 struct exynos_drm_private *private; 250 struct drm_encoder *encoder; 251 struct drm_device *drm; 252 unsigned int clone_mask; 253 int ret; 254 255 drm = drm_dev_alloc(&exynos_drm_driver, dev); 256 if (IS_ERR(drm)) 257 return PTR_ERR(drm); 258 259 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL); 260 if (!private) { 261 ret = -ENOMEM; 262 goto err_free_drm; 263 } 264 265 init_waitqueue_head(&private->wait); 266 spin_lock_init(&private->lock); 267 268 dev_set_drvdata(dev, drm); 269 drm->dev_private = (void *)private; 270 271 drm_mode_config_init(drm); 272 273 exynos_drm_mode_config_init(drm); 274 275 /* setup possible_clones. */ 276 clone_mask = 0; 277 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 278 clone_mask |= drm_encoder_mask(encoder); 279 280 list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) 281 encoder->possible_clones = clone_mask; 282 283 /* Try to bind all sub drivers. */ 284 ret = component_bind_all(drm->dev, drm); 285 if (ret) 286 goto err_mode_config_cleanup; 287 288 ret = drm_vblank_init(drm, drm->mode_config.num_crtc); 289 if (ret) 290 goto err_unbind_all; 291 292 drm_mode_config_reset(drm); 293 294 /* init kms poll for handling hpd */ 295 drm_kms_helper_poll_init(drm); 296 297 ret = exynos_drm_fbdev_init(drm); 298 if (ret) 299 goto err_cleanup_poll; 300 301 /* register the DRM device */ 302 ret = drm_dev_register(drm, 0); 303 if (ret < 0) 304 goto err_cleanup_fbdev; 305 306 return 0; 307 308 err_cleanup_fbdev: 309 exynos_drm_fbdev_fini(drm); 310 err_cleanup_poll: 311 drm_kms_helper_poll_fini(drm); 312 err_unbind_all: 313 component_unbind_all(drm->dev, drm); 314 err_mode_config_cleanup: 315 drm_mode_config_cleanup(drm); 316 exynos_drm_cleanup_dma(drm); 317 kfree(private); 318 err_free_drm: 319 drm_dev_put(drm); 320 321 return ret; 322 } 323 324 static void exynos_drm_unbind(struct device *dev) 325 { 326 struct drm_device *drm = dev_get_drvdata(dev); 327 328 drm_dev_unregister(drm); 329 330 exynos_drm_fbdev_fini(drm); 331 drm_kms_helper_poll_fini(drm); 332 333 component_unbind_all(drm->dev, drm); 334 drm_mode_config_cleanup(drm); 335 exynos_drm_cleanup_dma(drm); 336 337 kfree(drm->dev_private); 338 drm->dev_private = NULL; 339 dev_set_drvdata(dev, NULL); 340 341 drm_dev_put(drm); 342 } 343 344 static const struct component_master_ops exynos_drm_ops = { 345 .bind = exynos_drm_bind, 346 .unbind = exynos_drm_unbind, 347 }; 348 349 static int exynos_drm_platform_probe(struct platform_device *pdev) 350 { 351 struct component_match *match; 352 353 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 354 355 match = exynos_drm_match_add(&pdev->dev); 356 if (IS_ERR(match)) 357 return PTR_ERR(match); 358 359 return component_master_add_with_match(&pdev->dev, &exynos_drm_ops, 360 match); 361 } 362 363 static int exynos_drm_platform_remove(struct platform_device *pdev) 364 { 365 component_master_del(&pdev->dev, &exynos_drm_ops); 366 return 0; 367 } 368 369 static struct platform_driver exynos_drm_platform_driver = { 370 .probe = exynos_drm_platform_probe, 371 .remove = exynos_drm_platform_remove, 372 .driver = { 373 .name = "exynos-drm", 374 .pm = &exynos_drm_pm_ops, 375 }, 376 }; 377 378 static void exynos_drm_unregister_devices(void) 379 { 380 int i; 381 382 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 383 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 384 struct device *dev; 385 386 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 387 continue; 388 389 while ((dev = platform_find_device_by_driver(NULL, 390 &info->driver->driver))) { 391 put_device(dev); 392 platform_device_unregister(to_platform_device(dev)); 393 } 394 } 395 } 396 397 static int exynos_drm_register_devices(void) 398 { 399 struct platform_device *pdev; 400 int i; 401 402 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 403 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 404 405 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE)) 406 continue; 407 408 pdev = platform_device_register_simple( 409 info->driver->driver.name, -1, NULL, 0); 410 if (IS_ERR(pdev)) 411 goto fail; 412 } 413 414 return 0; 415 fail: 416 exynos_drm_unregister_devices(); 417 return PTR_ERR(pdev); 418 } 419 420 static void exynos_drm_unregister_drivers(void) 421 { 422 int i; 423 424 for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) { 425 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 426 427 if (!info->driver) 428 continue; 429 430 platform_driver_unregister(info->driver); 431 } 432 } 433 434 static int exynos_drm_register_drivers(void) 435 { 436 int i, ret; 437 438 for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) { 439 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i]; 440 441 if (!info->driver) 442 continue; 443 444 ret = platform_driver_register(info->driver); 445 if (ret) 446 goto fail; 447 } 448 return 0; 449 fail: 450 exynos_drm_unregister_drivers(); 451 return ret; 452 } 453 454 static int exynos_drm_init(void) 455 { 456 int ret; 457 458 ret = exynos_drm_register_devices(); 459 if (ret) 460 return ret; 461 462 ret = exynos_drm_register_drivers(); 463 if (ret) 464 goto err_unregister_pdevs; 465 466 return 0; 467 468 err_unregister_pdevs: 469 exynos_drm_unregister_devices(); 470 471 return ret; 472 } 473 474 static void exynos_drm_exit(void) 475 { 476 exynos_drm_unregister_drivers(); 477 exynos_drm_unregister_devices(); 478 } 479 480 module_init(exynos_drm_init); 481 module_exit(exynos_drm_exit); 482 483 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); 484 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 485 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); 486 MODULE_DESCRIPTION("Samsung SoC DRM Driver"); 487 MODULE_LICENSE("GPL"); 488