| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * Copyright (C) 2014-2015 Broadcom |
| 4 | * Copyright (C) 2013 Red Hat |
| 5 | */ |
| 6 | |
| 7 | /** |
| 8 | * DOC: Broadcom VC4 Graphics Driver |
| 9 | * |
| 10 | * The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a |
| 11 | * OpenGL ES 2.0-compatible 3D engine called V3D, and a highly |
| 12 | * configurable display output pipeline that supports HDMI, DSI, DPI, |
| 13 | * and Composite TV output. |
| 14 | * |
| 15 | * The 3D engine also has an interface for submitting arbitrary |
| 16 | * compute shader-style jobs using the same shader processor as is |
| 17 | * used for vertex and fragment shaders in GLES 2.0. However, given |
| 18 | * that the hardware isn't able to expose any standard interfaces like |
| 19 | * OpenGL compute shaders or OpenCL, it isn't supported by this |
| 20 | * driver. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/aperture.h> |
| 24 | #include <linux/clk.h> |
| 25 | #include <linux/component.h> |
| 26 | #include <linux/device.h> |
| 27 | #include <linux/dma-mapping.h> |
| 28 | #include <linux/io.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/of_device.h> |
| 31 | #include <linux/platform_device.h> |
| 32 | #include <linux/pm_runtime.h> |
| 33 | |
| 34 | #include <drm/clients/drm_client_setup.h> |
| 35 | #include <drm/drm_atomic_helper.h> |
| 36 | #include <drm/drm_drv.h> |
| 37 | #include <drm/drm_fbdev_dma.h> |
| 38 | #include <drm/drm_fourcc.h> |
| 39 | #include <drm/drm_print.h> |
| 40 | #include <drm/drm_vblank.h> |
| 41 | |
| 42 | #include <soc/bcm2835/raspberrypi-firmware.h> |
| 43 | |
| 44 | #include "uapi/drm/vc4_drm.h" |
| 45 | |
| 46 | #include "vc4_drv.h" |
| 47 | #include "vc4_regs.h" |
| 48 | |
| 49 | #define DRIVER_NAME "vc4" |
| 50 | #define DRIVER_DESC "Broadcom VC4 graphics" |
| 51 | #define DRIVER_MAJOR 0 |
| 52 | #define DRIVER_MINOR 0 |
| 53 | #define DRIVER_PATCHLEVEL 0 |
| 54 | |
| 55 | /* Helper function for mapping the regs on a platform device. */ |
| 56 | void __iomem *vc4_ioremap_regs(struct platform_device *pdev, int index) |
| 57 | { |
| 58 | void __iomem *map; |
| 59 | |
| 60 | map = devm_platform_ioremap_resource(pdev, index); |
| 61 | if (IS_ERR(ptr: map)) |
| 62 | return map; |
| 63 | |
| 64 | return map; |
| 65 | } |
| 66 | |
| 67 | int vc4_dumb_fixup_args(struct drm_mode_create_dumb *args) |
| 68 | { |
| 69 | int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); |
| 70 | |
| 71 | if (args->pitch < min_pitch) |
| 72 | args->pitch = min_pitch; |
| 73 | |
| 74 | if (args->size < args->pitch * args->height) |
| 75 | args->size = args->pitch * args->height; |
| 76 | |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | static int vc5_dumb_create(struct drm_file *file_priv, |
| 81 | struct drm_device *dev, |
| 82 | struct drm_mode_create_dumb *args) |
| 83 | { |
| 84 | int ret; |
| 85 | |
| 86 | ret = vc4_dumb_fixup_args(args); |
| 87 | if (ret) |
| 88 | return ret; |
| 89 | |
| 90 | return drm_gem_dma_dumb_create_internal(file_priv, drm: dev, args); |
| 91 | } |
| 92 | |
| 93 | static int vc4_get_param_ioctl(struct drm_device *dev, void *data, |
| 94 | struct drm_file *file_priv) |
| 95 | { |
| 96 | struct vc4_dev *vc4 = to_vc4_dev(dev); |
| 97 | struct drm_vc4_get_param *args = data; |
| 98 | int ret; |
| 99 | |
| 100 | if (args->pad != 0) |
| 101 | return -EINVAL; |
| 102 | |
| 103 | if (WARN_ON_ONCE(vc4->gen > VC4_GEN_4)) |
| 104 | return -ENODEV; |
| 105 | |
| 106 | if (!vc4->v3d) |
| 107 | return -ENODEV; |
| 108 | |
| 109 | switch (args->param) { |
| 110 | case DRM_VC4_PARAM_V3D_IDENT0: |
| 111 | ret = vc4_v3d_pm_get(vc4); |
| 112 | if (ret) |
| 113 | return ret; |
| 114 | args->value = V3D_READ(V3D_IDENT0); |
| 115 | vc4_v3d_pm_put(vc4); |
| 116 | break; |
| 117 | case DRM_VC4_PARAM_V3D_IDENT1: |
| 118 | ret = vc4_v3d_pm_get(vc4); |
| 119 | if (ret) |
| 120 | return ret; |
| 121 | args->value = V3D_READ(V3D_IDENT1); |
| 122 | vc4_v3d_pm_put(vc4); |
| 123 | break; |
| 124 | case DRM_VC4_PARAM_V3D_IDENT2: |
| 125 | ret = vc4_v3d_pm_get(vc4); |
| 126 | if (ret) |
| 127 | return ret; |
| 128 | args->value = V3D_READ(V3D_IDENT2); |
| 129 | vc4_v3d_pm_put(vc4); |
| 130 | break; |
| 131 | case DRM_VC4_PARAM_SUPPORTS_BRANCHES: |
| 132 | case DRM_VC4_PARAM_SUPPORTS_ETC1: |
| 133 | case DRM_VC4_PARAM_SUPPORTS_THREADED_FS: |
| 134 | case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER: |
| 135 | case DRM_VC4_PARAM_SUPPORTS_MADVISE: |
| 136 | case DRM_VC4_PARAM_SUPPORTS_PERFMON: |
| 137 | args->value = true; |
| 138 | break; |
| 139 | default: |
| 140 | DRM_DEBUG("Unknown parameter %d\n" , args->param); |
| 141 | return -EINVAL; |
| 142 | } |
| 143 | |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | static int vc4_open(struct drm_device *dev, struct drm_file *file) |
| 148 | { |
| 149 | struct vc4_dev *vc4 = to_vc4_dev(dev); |
| 150 | struct vc4_file *vc4file; |
| 151 | |
| 152 | if (WARN_ON_ONCE(vc4->gen > VC4_GEN_4)) |
| 153 | return -ENODEV; |
| 154 | |
| 155 | vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL); |
| 156 | if (!vc4file) |
| 157 | return -ENOMEM; |
| 158 | vc4file->dev = vc4; |
| 159 | |
| 160 | vc4_perfmon_open_file(vc4file); |
| 161 | file->driver_priv = vc4file; |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | static void vc4_close(struct drm_device *dev, struct drm_file *file) |
| 166 | { |
| 167 | struct vc4_dev *vc4 = to_vc4_dev(dev); |
| 168 | struct vc4_file *vc4file = file->driver_priv; |
| 169 | |
| 170 | if (WARN_ON_ONCE(vc4->gen > VC4_GEN_4)) |
| 171 | return; |
| 172 | |
| 173 | if (vc4file->bin_bo_used) |
| 174 | vc4_v3d_bin_bo_put(vc4); |
| 175 | |
| 176 | vc4_perfmon_close_file(vc4file); |
| 177 | kfree(objp: vc4file); |
| 178 | } |
| 179 | |
| 180 | DEFINE_DRM_GEM_FOPS(vc4_drm_fops); |
| 181 | |
| 182 | static const struct drm_ioctl_desc vc4_drm_ioctls[] = { |
| 183 | DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW), |
| 184 | DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW), |
| 185 | DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW), |
| 186 | DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW), |
| 187 | DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW), |
| 188 | DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW), |
| 189 | DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl, |
| 190 | DRM_ROOT_ONLY), |
| 191 | DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW), |
| 192 | DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW), |
| 193 | DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW), |
| 194 | DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW), |
| 195 | DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW), |
| 196 | DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW), |
| 197 | DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW), |
| 198 | DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW), |
| 199 | }; |
| 200 | |
| 201 | const struct drm_driver vc4_drm_driver = { |
| 202 | .driver_features = (DRIVER_MODESET | |
| 203 | DRIVER_ATOMIC | |
| 204 | DRIVER_GEM | |
| 205 | DRIVER_RENDER | |
| 206 | DRIVER_SYNCOBJ), |
| 207 | .open = vc4_open, |
| 208 | .postclose = vc4_close, |
| 209 | |
| 210 | #if defined(CONFIG_DEBUG_FS) |
| 211 | .debugfs_init = vc4_debugfs_init, |
| 212 | #endif |
| 213 | |
| 214 | .gem_create_object = vc4_create_object, |
| 215 | |
| 216 | DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc4_bo_dumb_create), |
| 217 | DRM_FBDEV_DMA_DRIVER_OPS, |
| 218 | |
| 219 | .ioctls = vc4_drm_ioctls, |
| 220 | .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), |
| 221 | .fops = &vc4_drm_fops, |
| 222 | |
| 223 | .name = DRIVER_NAME, |
| 224 | .desc = DRIVER_DESC, |
| 225 | .major = DRIVER_MAJOR, |
| 226 | .minor = DRIVER_MINOR, |
| 227 | .patchlevel = DRIVER_PATCHLEVEL, |
| 228 | }; |
| 229 | |
| 230 | const struct drm_driver vc5_drm_driver = { |
| 231 | .driver_features = (DRIVER_MODESET | |
| 232 | DRIVER_ATOMIC | |
| 233 | DRIVER_GEM), |
| 234 | |
| 235 | #if defined(CONFIG_DEBUG_FS) |
| 236 | .debugfs_init = vc4_debugfs_init, |
| 237 | #endif |
| 238 | |
| 239 | DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc5_dumb_create), |
| 240 | DRM_FBDEV_DMA_DRIVER_OPS, |
| 241 | |
| 242 | .fops = &vc4_drm_fops, |
| 243 | |
| 244 | .name = DRIVER_NAME, |
| 245 | .desc = DRIVER_DESC, |
| 246 | .major = DRIVER_MAJOR, |
| 247 | .minor = DRIVER_MINOR, |
| 248 | .patchlevel = DRIVER_PATCHLEVEL, |
| 249 | }; |
| 250 | |
| 251 | static void vc4_match_add_drivers(struct device *dev, |
| 252 | struct component_match **match, |
| 253 | struct platform_driver *const *drivers, |
| 254 | int count) |
| 255 | { |
| 256 | int i; |
| 257 | |
| 258 | for (i = 0; i < count; i++) { |
| 259 | struct device_driver *drv = &drivers[i]->driver; |
| 260 | struct device *p = NULL, *d; |
| 261 | |
| 262 | while ((d = platform_find_device_by_driver(start: p, drv))) { |
| 263 | put_device(dev: p); |
| 264 | component_match_add(parent: dev, matchptr: match, compare: component_compare_dev, compare_data: d); |
| 265 | p = d; |
| 266 | } |
| 267 | put_device(dev: p); |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | static void vc4_component_unbind_all(void *ptr) |
| 272 | { |
| 273 | struct vc4_dev *vc4 = ptr; |
| 274 | |
| 275 | component_unbind_all(parent: vc4->dev, data: &vc4->base); |
| 276 | } |
| 277 | |
| 278 | static const struct of_device_id vc4_dma_range_matches[] = { |
| 279 | { .compatible = "brcm,bcm2711-hvs" }, |
| 280 | { .compatible = "brcm,bcm2712-hvs" }, |
| 281 | { .compatible = "brcm,bcm2835-hvs" }, |
| 282 | { .compatible = "brcm,bcm2835-v3d" }, |
| 283 | { .compatible = "brcm,cygnus-v3d" }, |
| 284 | { .compatible = "brcm,vc4-v3d" }, |
| 285 | {} |
| 286 | }; |
| 287 | |
| 288 | static int vc4_drm_bind(struct device *dev) |
| 289 | { |
| 290 | struct platform_device *pdev = to_platform_device(dev); |
| 291 | const struct drm_driver *driver; |
| 292 | struct rpi_firmware *firmware = NULL; |
| 293 | struct drm_device *drm; |
| 294 | struct vc4_dev *vc4; |
| 295 | struct device_node *node; |
| 296 | struct drm_crtc *crtc; |
| 297 | enum vc4_gen gen; |
| 298 | int ret = 0; |
| 299 | |
| 300 | dev->coherent_dma_mask = DMA_BIT_MASK(32); |
| 301 | |
| 302 | gen = (enum vc4_gen)of_device_get_match_data(dev); |
| 303 | |
| 304 | if (gen > VC4_GEN_4) |
| 305 | driver = &vc5_drm_driver; |
| 306 | else |
| 307 | driver = &vc4_drm_driver; |
| 308 | |
| 309 | if (gen >= VC4_GEN_6_C) |
| 310 | dma_set_mask_and_coherent(dev, DMA_BIT_MASK(36)); |
| 311 | else |
| 312 | dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); |
| 313 | |
| 314 | node = of_find_matching_node_and_match(NULL, matches: vc4_dma_range_matches, |
| 315 | NULL); |
| 316 | if (node) { |
| 317 | ret = of_dma_configure(dev, np: node, force_dma: true); |
| 318 | of_node_put(node); |
| 319 | |
| 320 | if (ret) |
| 321 | return ret; |
| 322 | } |
| 323 | |
| 324 | vc4 = devm_drm_dev_alloc(dev, driver, struct vc4_dev, base); |
| 325 | if (IS_ERR(ptr: vc4)) |
| 326 | return PTR_ERR(ptr: vc4); |
| 327 | vc4->gen = gen; |
| 328 | vc4->dev = dev; |
| 329 | |
| 330 | drm = &vc4->base; |
| 331 | platform_set_drvdata(pdev, data: drm); |
| 332 | |
| 333 | if (gen == VC4_GEN_4) { |
| 334 | ret = drmm_mutex_init(drm, &vc4->bin_bo_lock); |
| 335 | if (ret) |
| 336 | goto err; |
| 337 | |
| 338 | ret = vc4_bo_cache_init(dev: drm); |
| 339 | if (ret) |
| 340 | goto err; |
| 341 | } |
| 342 | |
| 343 | ret = drmm_mode_config_init(dev: drm); |
| 344 | if (ret) |
| 345 | goto err; |
| 346 | |
| 347 | if (gen == VC4_GEN_4) { |
| 348 | ret = vc4_gem_init(dev: drm); |
| 349 | if (ret) |
| 350 | goto err; |
| 351 | } |
| 352 | |
| 353 | node = of_find_compatible_node(NULL, NULL, compat: "raspberrypi,bcm2835-firmware" ); |
| 354 | if (node) { |
| 355 | firmware = rpi_firmware_get(firmware_node: node); |
| 356 | of_node_put(node); |
| 357 | |
| 358 | if (!firmware) { |
| 359 | ret = -EPROBE_DEFER; |
| 360 | goto err; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | ret = aperture_remove_all_conflicting_devices(name: driver->name); |
| 365 | if (ret) |
| 366 | goto err; |
| 367 | |
| 368 | if (firmware) { |
| 369 | ret = rpi_firmware_property(fw: firmware, |
| 370 | tag: RPI_FIRMWARE_NOTIFY_DISPLAY_DONE, |
| 371 | NULL, len: 0); |
| 372 | if (ret) |
| 373 | drm_warn(drm, "Couldn't stop firmware display driver: %d\n" , ret); |
| 374 | |
| 375 | rpi_firmware_put(fw: firmware); |
| 376 | } |
| 377 | |
| 378 | ret = component_bind_all(parent: dev, data: drm); |
| 379 | if (ret) |
| 380 | goto err; |
| 381 | |
| 382 | ret = devm_add_action_or_reset(dev, vc4_component_unbind_all, vc4); |
| 383 | if (ret) |
| 384 | goto err; |
| 385 | |
| 386 | ret = vc4_plane_create_additional_planes(dev: drm); |
| 387 | if (ret) |
| 388 | goto err; |
| 389 | |
| 390 | ret = vc4_kms_load(dev: drm); |
| 391 | if (ret < 0) |
| 392 | goto err; |
| 393 | |
| 394 | drm_for_each_crtc(crtc, drm) |
| 395 | vc4_crtc_disable_at_boot(crtc); |
| 396 | |
| 397 | ret = drm_dev_register(dev: drm, flags: 0); |
| 398 | if (ret < 0) |
| 399 | goto err; |
| 400 | |
| 401 | drm_client_setup_with_fourcc(dev: drm, DRM_FORMAT_RGB565); |
| 402 | |
| 403 | return 0; |
| 404 | |
| 405 | err: |
| 406 | platform_set_drvdata(pdev, NULL); |
| 407 | return ret; |
| 408 | } |
| 409 | |
| 410 | static void vc4_drm_unbind(struct device *dev) |
| 411 | { |
| 412 | struct drm_device *drm = dev_get_drvdata(dev); |
| 413 | |
| 414 | drm_dev_unplug(dev: drm); |
| 415 | drm_atomic_helper_shutdown(dev: drm); |
| 416 | dev_set_drvdata(dev, NULL); |
| 417 | } |
| 418 | |
| 419 | static const struct component_master_ops vc4_drm_ops = { |
| 420 | .bind = vc4_drm_bind, |
| 421 | .unbind = vc4_drm_unbind, |
| 422 | }; |
| 423 | |
| 424 | /* |
| 425 | * This list determines the binding order of our components, and we have |
| 426 | * a few constraints: |
| 427 | * - The TXP driver needs to be bound before the PixelValves (CRTC) |
| 428 | * but after the HVS to set the possible_crtc field properly |
| 429 | * - The HDMI driver needs to be bound after the HVS so that we can |
| 430 | * lookup the HVS maximum core clock rate and figure out if we |
| 431 | * support 4kp60 or not. |
| 432 | */ |
| 433 | static struct platform_driver *const component_drivers[] = { |
| 434 | &vc4_hvs_driver, |
| 435 | &vc4_hdmi_driver, |
| 436 | &vc4_vec_driver, |
| 437 | &vc4_dpi_driver, |
| 438 | &vc4_dsi_driver, |
| 439 | &vc4_txp_driver, |
| 440 | &vc4_crtc_driver, |
| 441 | &vc4_v3d_driver, |
| 442 | }; |
| 443 | |
| 444 | static int vc4_platform_drm_probe(struct platform_device *pdev) |
| 445 | { |
| 446 | struct component_match *match = NULL; |
| 447 | struct device *dev = &pdev->dev; |
| 448 | |
| 449 | vc4_match_add_drivers(dev, match: &match, |
| 450 | drivers: component_drivers, ARRAY_SIZE(component_drivers)); |
| 451 | |
| 452 | return component_master_add_with_match(dev, &vc4_drm_ops, match); |
| 453 | } |
| 454 | |
| 455 | static void vc4_platform_drm_remove(struct platform_device *pdev) |
| 456 | { |
| 457 | component_master_del(&pdev->dev, &vc4_drm_ops); |
| 458 | } |
| 459 | |
| 460 | static void vc4_platform_drm_shutdown(struct platform_device *pdev) |
| 461 | { |
| 462 | drm_atomic_helper_shutdown(dev: platform_get_drvdata(pdev)); |
| 463 | } |
| 464 | |
| 465 | static const struct of_device_id vc4_of_match[] = { |
| 466 | { .compatible = "brcm,bcm2711-vc5" , .data = (void *)VC4_GEN_5 }, |
| 467 | /* NB GEN_6_C will be corrected on D0 hw to GEN_6_D via vc4_hvs_bind */ |
| 468 | { .compatible = "brcm,bcm2712-vc6" , .data = (void *)VC4_GEN_6_C }, |
| 469 | { .compatible = "brcm,bcm2835-vc4" , .data = (void *)VC4_GEN_4 }, |
| 470 | { .compatible = "brcm,cygnus-vc4" , .data = (void *)VC4_GEN_4 }, |
| 471 | {}, |
| 472 | }; |
| 473 | MODULE_DEVICE_TABLE(of, vc4_of_match); |
| 474 | |
| 475 | static struct platform_driver vc4_platform_driver = { |
| 476 | .probe = vc4_platform_drm_probe, |
| 477 | .remove = vc4_platform_drm_remove, |
| 478 | .shutdown = vc4_platform_drm_shutdown, |
| 479 | .driver = { |
| 480 | .name = "vc4-drm" , |
| 481 | .of_match_table = vc4_of_match, |
| 482 | }, |
| 483 | }; |
| 484 | |
| 485 | static int __init vc4_drm_register(void) |
| 486 | { |
| 487 | int ret; |
| 488 | |
| 489 | if (drm_firmware_drivers_only()) |
| 490 | return -ENODEV; |
| 491 | |
| 492 | ret = platform_register_drivers(component_drivers, |
| 493 | ARRAY_SIZE(component_drivers)); |
| 494 | if (ret) |
| 495 | return ret; |
| 496 | |
| 497 | ret = platform_driver_register(&vc4_platform_driver); |
| 498 | if (ret) |
| 499 | platform_unregister_drivers(drivers: component_drivers, |
| 500 | ARRAY_SIZE(component_drivers)); |
| 501 | |
| 502 | return ret; |
| 503 | } |
| 504 | |
| 505 | static void __exit vc4_drm_unregister(void) |
| 506 | { |
| 507 | platform_unregister_drivers(drivers: component_drivers, |
| 508 | ARRAY_SIZE(component_drivers)); |
| 509 | platform_driver_unregister(&vc4_platform_driver); |
| 510 | } |
| 511 | |
| 512 | module_init(vc4_drm_register); |
| 513 | module_exit(vc4_drm_unregister); |
| 514 | |
| 515 | MODULE_ALIAS("platform:vc4-drm" ); |
| 516 | MODULE_SOFTDEP("pre: snd-soc-hdmi-codec" ); |
| 517 | MODULE_DESCRIPTION("Broadcom VC4 DRM Driver" ); |
| 518 | MODULE_AUTHOR("Eric Anholt <eric@anholt.net>" ); |
| 519 | MODULE_LICENSE("GPL v2" ); |
| 520 | |