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/clk.h> 24 #include <linux/component.h> 25 #include <linux/device.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/io.h> 28 #include <linux/module.h> 29 #include <linux/of_platform.h> 30 #include <linux/platform_device.h> 31 #include <linux/pm_runtime.h> 32 33 #include <drm/drm_aperture.h> 34 #include <drm/drm_atomic_helper.h> 35 #include <drm/drm_drv.h> 36 #include <drm/drm_fbdev_dma.h> 37 #include <drm/drm_vblank.h> 38 39 #include <soc/bcm2835/raspberrypi-firmware.h> 40 41 #include "uapi/drm/vc4_drm.h" 42 43 #include "vc4_drv.h" 44 #include "vc4_regs.h" 45 46 #define DRIVER_NAME "vc4" 47 #define DRIVER_DESC "Broadcom VC4 graphics" 48 #define DRIVER_DATE "20140616" 49 #define DRIVER_MAJOR 0 50 #define DRIVER_MINOR 0 51 #define DRIVER_PATCHLEVEL 0 52 53 /* Helper function for mapping the regs on a platform device. */ 54 void __iomem *vc4_ioremap_regs(struct platform_device *pdev, int index) 55 { 56 void __iomem *map; 57 58 map = devm_platform_ioremap_resource(pdev, index); 59 if (IS_ERR(map)) 60 return map; 61 62 return map; 63 } 64 65 int vc4_dumb_fixup_args(struct drm_mode_create_dumb *args) 66 { 67 int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); 68 69 if (args->pitch < min_pitch) 70 args->pitch = min_pitch; 71 72 if (args->size < args->pitch * args->height) 73 args->size = args->pitch * args->height; 74 75 return 0; 76 } 77 78 static int vc5_dumb_create(struct drm_file *file_priv, 79 struct drm_device *dev, 80 struct drm_mode_create_dumb *args) 81 { 82 int ret; 83 84 ret = vc4_dumb_fixup_args(args); 85 if (ret) 86 return ret; 87 88 return drm_gem_dma_dumb_create_internal(file_priv, dev, args); 89 } 90 91 static int vc4_get_param_ioctl(struct drm_device *dev, void *data, 92 struct drm_file *file_priv) 93 { 94 struct vc4_dev *vc4 = to_vc4_dev(dev); 95 struct drm_vc4_get_param *args = data; 96 int ret; 97 98 if (args->pad != 0) 99 return -EINVAL; 100 101 if (WARN_ON_ONCE(vc4->is_vc5)) 102 return -ENODEV; 103 104 if (!vc4->v3d) 105 return -ENODEV; 106 107 switch (args->param) { 108 case DRM_VC4_PARAM_V3D_IDENT0: 109 ret = vc4_v3d_pm_get(vc4); 110 if (ret) 111 return ret; 112 args->value = V3D_READ(V3D_IDENT0); 113 vc4_v3d_pm_put(vc4); 114 break; 115 case DRM_VC4_PARAM_V3D_IDENT1: 116 ret = vc4_v3d_pm_get(vc4); 117 if (ret) 118 return ret; 119 args->value = V3D_READ(V3D_IDENT1); 120 vc4_v3d_pm_put(vc4); 121 break; 122 case DRM_VC4_PARAM_V3D_IDENT2: 123 ret = vc4_v3d_pm_get(vc4); 124 if (ret) 125 return ret; 126 args->value = V3D_READ(V3D_IDENT2); 127 vc4_v3d_pm_put(vc4); 128 break; 129 case DRM_VC4_PARAM_SUPPORTS_BRANCHES: 130 case DRM_VC4_PARAM_SUPPORTS_ETC1: 131 case DRM_VC4_PARAM_SUPPORTS_THREADED_FS: 132 case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER: 133 case DRM_VC4_PARAM_SUPPORTS_MADVISE: 134 case DRM_VC4_PARAM_SUPPORTS_PERFMON: 135 args->value = true; 136 break; 137 default: 138 DRM_DEBUG("Unknown parameter %d\n", args->param); 139 return -EINVAL; 140 } 141 142 return 0; 143 } 144 145 static int vc4_open(struct drm_device *dev, struct drm_file *file) 146 { 147 struct vc4_dev *vc4 = to_vc4_dev(dev); 148 struct vc4_file *vc4file; 149 150 if (WARN_ON_ONCE(vc4->is_vc5)) 151 return -ENODEV; 152 153 vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL); 154 if (!vc4file) 155 return -ENOMEM; 156 vc4file->dev = vc4; 157 158 vc4_perfmon_open_file(vc4file); 159 file->driver_priv = vc4file; 160 return 0; 161 } 162 163 static void vc4_close(struct drm_device *dev, struct drm_file *file) 164 { 165 struct vc4_dev *vc4 = to_vc4_dev(dev); 166 struct vc4_file *vc4file = file->driver_priv; 167 168 if (WARN_ON_ONCE(vc4->is_vc5)) 169 return; 170 171 if (vc4file->bin_bo_used) 172 vc4_v3d_bin_bo_put(vc4); 173 174 vc4_perfmon_close_file(vc4file); 175 kfree(vc4file); 176 } 177 178 DEFINE_DRM_GEM_FOPS(vc4_drm_fops); 179 180 static const struct drm_ioctl_desc vc4_drm_ioctls[] = { 181 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW), 182 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW), 183 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW), 184 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW), 185 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW), 186 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW), 187 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl, 188 DRM_ROOT_ONLY), 189 DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW), 190 DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW), 191 DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW), 192 DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW), 193 DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW), 194 DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW), 195 DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW), 196 DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW), 197 }; 198 199 const struct drm_driver vc4_drm_driver = { 200 .driver_features = (DRIVER_MODESET | 201 DRIVER_ATOMIC | 202 DRIVER_GEM | 203 DRIVER_RENDER | 204 DRIVER_SYNCOBJ), 205 .open = vc4_open, 206 .postclose = vc4_close, 207 208 #if defined(CONFIG_DEBUG_FS) 209 .debugfs_init = vc4_debugfs_init, 210 #endif 211 212 .gem_create_object = vc4_create_object, 213 214 DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc4_bo_dumb_create), 215 216 .ioctls = vc4_drm_ioctls, 217 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), 218 .fops = &vc4_drm_fops, 219 220 .name = DRIVER_NAME, 221 .desc = DRIVER_DESC, 222 .date = DRIVER_DATE, 223 .major = DRIVER_MAJOR, 224 .minor = DRIVER_MINOR, 225 .patchlevel = DRIVER_PATCHLEVEL, 226 }; 227 228 const struct drm_driver vc5_drm_driver = { 229 .driver_features = (DRIVER_MODESET | 230 DRIVER_ATOMIC | 231 DRIVER_GEM), 232 233 #if defined(CONFIG_DEBUG_FS) 234 .debugfs_init = vc4_debugfs_init, 235 #endif 236 237 DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc5_dumb_create), 238 239 .fops = &vc4_drm_fops, 240 241 .name = DRIVER_NAME, 242 .desc = DRIVER_DESC, 243 .date = DRIVER_DATE, 244 .major = DRIVER_MAJOR, 245 .minor = DRIVER_MINOR, 246 .patchlevel = DRIVER_PATCHLEVEL, 247 }; 248 249 static void vc4_match_add_drivers(struct device *dev, 250 struct component_match **match, 251 struct platform_driver *const *drivers, 252 int count) 253 { 254 int i; 255 256 for (i = 0; i < count; i++) { 257 struct device_driver *drv = &drivers[i]->driver; 258 struct device *p = NULL, *d; 259 260 while ((d = platform_find_device_by_driver(p, drv))) { 261 put_device(p); 262 component_match_add(dev, match, component_compare_dev, d); 263 p = d; 264 } 265 put_device(p); 266 } 267 } 268 269 static void vc4_component_unbind_all(void *ptr) 270 { 271 struct vc4_dev *vc4 = ptr; 272 273 component_unbind_all(vc4->dev, &vc4->base); 274 } 275 276 static const struct of_device_id vc4_dma_range_matches[] = { 277 { .compatible = "brcm,bcm2711-hvs" }, 278 { .compatible = "brcm,bcm2835-hvs" }, 279 { .compatible = "brcm,bcm2835-v3d" }, 280 { .compatible = "brcm,cygnus-v3d" }, 281 { .compatible = "brcm,vc4-v3d" }, 282 {} 283 }; 284 285 static int vc4_drm_bind(struct device *dev) 286 { 287 struct platform_device *pdev = to_platform_device(dev); 288 const struct drm_driver *driver; 289 struct rpi_firmware *firmware = NULL; 290 struct drm_device *drm; 291 struct vc4_dev *vc4; 292 struct device_node *node; 293 struct drm_crtc *crtc; 294 bool is_vc5; 295 int ret = 0; 296 297 dev->coherent_dma_mask = DMA_BIT_MASK(32); 298 299 is_vc5 = of_device_is_compatible(dev->of_node, "brcm,bcm2711-vc5"); 300 if (is_vc5) 301 driver = &vc5_drm_driver; 302 else 303 driver = &vc4_drm_driver; 304 305 node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches, 306 NULL); 307 if (node) { 308 ret = of_dma_configure(dev, node, true); 309 of_node_put(node); 310 311 if (ret) 312 return ret; 313 } 314 315 vc4 = devm_drm_dev_alloc(dev, driver, struct vc4_dev, base); 316 if (IS_ERR(vc4)) 317 return PTR_ERR(vc4); 318 vc4->is_vc5 = is_vc5; 319 vc4->dev = dev; 320 321 drm = &vc4->base; 322 platform_set_drvdata(pdev, drm); 323 324 if (!is_vc5) { 325 ret = drmm_mutex_init(drm, &vc4->bin_bo_lock); 326 if (ret) 327 return ret; 328 329 ret = vc4_bo_cache_init(drm); 330 if (ret) 331 return ret; 332 } 333 334 ret = drmm_mode_config_init(drm); 335 if (ret) 336 return ret; 337 338 if (!is_vc5) { 339 ret = vc4_gem_init(drm); 340 if (ret) 341 return ret; 342 } 343 344 node = of_find_compatible_node(NULL, NULL, "raspberrypi,bcm2835-firmware"); 345 if (node) { 346 firmware = rpi_firmware_get(node); 347 of_node_put(node); 348 349 if (!firmware) 350 return -EPROBE_DEFER; 351 } 352 353 ret = drm_aperture_remove_framebuffers(false, driver); 354 if (ret) 355 return ret; 356 357 if (firmware) { 358 ret = rpi_firmware_property(firmware, 359 RPI_FIRMWARE_NOTIFY_DISPLAY_DONE, 360 NULL, 0); 361 if (ret) 362 drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret); 363 364 rpi_firmware_put(firmware); 365 } 366 367 ret = component_bind_all(dev, drm); 368 if (ret) 369 return ret; 370 371 ret = devm_add_action_or_reset(dev, vc4_component_unbind_all, vc4); 372 if (ret) 373 return ret; 374 375 ret = vc4_plane_create_additional_planes(drm); 376 if (ret) 377 goto unbind_all; 378 379 ret = vc4_kms_load(drm); 380 if (ret < 0) 381 goto unbind_all; 382 383 drm_for_each_crtc(crtc, drm) 384 vc4_crtc_disable_at_boot(crtc); 385 386 ret = drm_dev_register(drm, 0); 387 if (ret < 0) 388 goto unbind_all; 389 390 drm_fbdev_dma_setup(drm, 16); 391 392 return 0; 393 394 unbind_all: 395 return ret; 396 } 397 398 static void vc4_drm_unbind(struct device *dev) 399 { 400 struct drm_device *drm = dev_get_drvdata(dev); 401 402 drm_dev_unplug(drm); 403 drm_atomic_helper_shutdown(drm); 404 } 405 406 static const struct component_master_ops vc4_drm_ops = { 407 .bind = vc4_drm_bind, 408 .unbind = vc4_drm_unbind, 409 }; 410 411 /* 412 * This list determines the binding order of our components, and we have 413 * a few constraints: 414 * - The TXP driver needs to be bound before the PixelValves (CRTC) 415 * but after the HVS to set the possible_crtc field properly 416 * - The HDMI driver needs to be bound after the HVS so that we can 417 * lookup the HVS maximum core clock rate and figure out if we 418 * support 4kp60 or not. 419 */ 420 static struct platform_driver *const component_drivers[] = { 421 &vc4_hvs_driver, 422 &vc4_hdmi_driver, 423 &vc4_vec_driver, 424 &vc4_dpi_driver, 425 &vc4_dsi_driver, 426 &vc4_txp_driver, 427 &vc4_crtc_driver, 428 &vc4_v3d_driver, 429 }; 430 431 static int vc4_platform_drm_probe(struct platform_device *pdev) 432 { 433 struct component_match *match = NULL; 434 struct device *dev = &pdev->dev; 435 436 vc4_match_add_drivers(dev, &match, 437 component_drivers, ARRAY_SIZE(component_drivers)); 438 439 return component_master_add_with_match(dev, &vc4_drm_ops, match); 440 } 441 442 static int vc4_platform_drm_remove(struct platform_device *pdev) 443 { 444 component_master_del(&pdev->dev, &vc4_drm_ops); 445 446 return 0; 447 } 448 449 static const struct of_device_id vc4_of_match[] = { 450 { .compatible = "brcm,bcm2711-vc5", }, 451 { .compatible = "brcm,bcm2835-vc4", }, 452 { .compatible = "brcm,cygnus-vc4", }, 453 {}, 454 }; 455 MODULE_DEVICE_TABLE(of, vc4_of_match); 456 457 static struct platform_driver vc4_platform_driver = { 458 .probe = vc4_platform_drm_probe, 459 .remove = vc4_platform_drm_remove, 460 .driver = { 461 .name = "vc4-drm", 462 .of_match_table = vc4_of_match, 463 }, 464 }; 465 466 static int __init vc4_drm_register(void) 467 { 468 int ret; 469 470 if (drm_firmware_drivers_only()) 471 return -ENODEV; 472 473 ret = platform_register_drivers(component_drivers, 474 ARRAY_SIZE(component_drivers)); 475 if (ret) 476 return ret; 477 478 ret = platform_driver_register(&vc4_platform_driver); 479 if (ret) 480 platform_unregister_drivers(component_drivers, 481 ARRAY_SIZE(component_drivers)); 482 483 return ret; 484 } 485 486 static void __exit vc4_drm_unregister(void) 487 { 488 platform_unregister_drivers(component_drivers, 489 ARRAY_SIZE(component_drivers)); 490 platform_driver_unregister(&vc4_platform_driver); 491 } 492 493 module_init(vc4_drm_register); 494 module_exit(vc4_drm_unregister); 495 496 MODULE_ALIAS("platform:vc4-drm"); 497 MODULE_SOFTDEP("pre: snd-soc-hdmi-codec"); 498 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); 499 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); 500 MODULE_LICENSE("GPL v2"); 501