drivers/gpu/drm/vc4/vc4_drv.c

   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/drm_atomic_helper.h>
  35 #include <drm/drm_client_setup.h>
  36 #include <drm/drm_drv.h>
  37 #include <drm/drm_fbdev_dma.h>
  38 #include <drm/drm_fourcc.h>
  39 #include <drm/drm_vblank.h>
  40
  41 #include <soc/bcm2835/raspberrypi-firmware.h>
  42
  43 #include "uapi/drm/vc4_drm.h"
  44
  45 #include "vc4_drv.h"
  46 #include "vc4_regs.h"
  47
  48 #define DRIVER_NAME "vc4"
  49 #define DRIVER_DESC "Broadcom VC4 graphics"
  50 #define DRIVER_DATE "20140616"
  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(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, 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(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         .date = DRIVER_DATE,
 226         .major = DRIVER_MAJOR,
 227         .minor = DRIVER_MINOR,
 228         .patchlevel = DRIVER_PATCHLEVEL,
 229 };
 230
 231 const struct drm_driver vc5_drm_driver = {
 232         .driver_features = (DRIVER_MODESET |
 233                             DRIVER_ATOMIC |
 234                             DRIVER_GEM),
 235
 236 #if defined(CONFIG_DEBUG_FS)
 237         .debugfs_init = vc4_debugfs_init,
 238 #endif
 239
 240         DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc5_dumb_create),
 241         DRM_FBDEV_DMA_DRIVER_OPS,
 242
 243         .fops = &vc4_drm_fops,
 244
 245         .name = DRIVER_NAME,
 246         .desc = DRIVER_DESC,
 247         .date = DRIVER_DATE,
 248         .major = DRIVER_MAJOR,
 249         .minor = DRIVER_MINOR,
 250         .patchlevel = DRIVER_PATCHLEVEL,
 251 };
 252
 253 static void vc4_match_add_drivers(struct device *dev,
 254                                   struct component_match **match,
 255                                   struct platform_driver *const *drivers,
 256                                   int count)
 257 {
 258         int i;
 259
 260         for (i = 0; i < count; i++) {
 261                 struct device_driver *drv = &drivers[i]->driver;
 262                 struct device *p = NULL, *d;
 263
 264                 while ((d = platform_find_device_by_driver(p, drv))) {
 265                         put_device(p);
 266                         component_match_add(dev, match, component_compare_dev, d);
 267                         p = d;
 268                 }
 269                 put_device(p);
 270         }
 271 }
 272
 273 static void vc4_component_unbind_all(void *ptr)
 274 {
 275         struct vc4_dev *vc4 = ptr;
 276
 277         component_unbind_all(vc4->dev, &vc4->base);
 278 }
 279
 280 static const struct of_device_id vc4_dma_range_matches[] = {
 281         { .compatible = "brcm,bcm2711-hvs" },
 282         { .compatible = "brcm,bcm2835-hvs" },
 283         { .compatible = "brcm,bcm2835-v3d" },
 284         { .compatible = "brcm,cygnus-v3d" },
 285         { .compatible = "brcm,vc4-v3d" },
 286         {}
 287 };
 288
 289 static int vc4_drm_bind(struct device *dev)
 290 {
 291         struct platform_device *pdev = to_platform_device(dev);
 292         const struct drm_driver *driver;
 293         struct rpi_firmware *firmware = NULL;
 294         struct drm_device *drm;
 295         struct vc4_dev *vc4;
 296         struct device_node *node;
 297         struct drm_crtc *crtc;
 298         enum vc4_gen gen;
 299         int ret = 0;
 300
 301         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 302
 303         if (of_device_is_compatible(dev->of_node, "brcm,bcm2711-vc5"))
 304                 gen = VC4_GEN_5;
 305         else
 306                 gen = VC4_GEN_4;
 307
 308         if (gen > VC4_GEN_4)
 309                 driver = &vc5_drm_driver;
 310         else
 311                 driver = &vc4_drm_driver;
 312
 313         node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches,
 314                                                NULL);
 315         if (node) {
 316                 ret = of_dma_configure(dev, node, true);
 317                 of_node_put(node);
 318
 319                 if (ret)
 320                         return ret;
 321         }
 322
 323         vc4 = devm_drm_dev_alloc(dev, driver, struct vc4_dev, base);
 324         if (IS_ERR(vc4))
 325                 return PTR_ERR(vc4);
 326         vc4->gen = gen;
 327         vc4->dev = dev;
 328
 329         drm = &vc4->base;
 330         platform_set_drvdata(pdev, drm);
 331
 332         if (gen == VC4_GEN_4) {
 333                 ret = drmm_mutex_init(drm, &vc4->bin_bo_lock);
 334                 if (ret)
 335                         goto err;
 336
 337                 ret = vc4_bo_cache_init(drm);
 338                 if (ret)
 339                         goto err;
 340         }
 341
 342         ret = drmm_mode_config_init(drm);
 343         if (ret)
 344                 goto err;
 345
 346         if (gen == VC4_GEN_4) {
 347                 ret = vc4_gem_init(drm);
 348                 if (ret)
 349                         goto err;
 350         }
 351
 352         node = of_find_compatible_node(NULL, NULL, "raspberrypi,bcm2835-firmware");
 353         if (node) {
 354                 firmware = rpi_firmware_get(node);
 355                 of_node_put(node);
 356
 357                 if (!firmware) {
 358                         ret = -EPROBE_DEFER;
 359                         goto err;
 360                 }
 361         }
 362
 363         ret = aperture_remove_all_conflicting_devices(driver->name);
 364         if (ret)
 365                 goto err;
 366
 367         if (firmware) {
 368                 ret = rpi_firmware_property(firmware,
 369                                             RPI_FIRMWARE_NOTIFY_DISPLAY_DONE,
 370                                             NULL, 0);
 371                 if (ret)
 372                         drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret);
 373
 374                 rpi_firmware_put(firmware);
 375         }
 376
 377         ret = component_bind_all(dev, drm);
 378         if (ret)
 379                 goto err;
 380
 381         ret = devm_add_action_or_reset(dev, vc4_component_unbind_all, vc4);
 382         if (ret)
 383                 goto err;
 384
 385         ret = vc4_plane_create_additional_planes(drm);
 386         if (ret)
 387                 goto err;
 388
 389         ret = vc4_kms_load(drm);
 390         if (ret < 0)
 391                 goto err;
 392
 393         drm_for_each_crtc(crtc, drm)
 394                 vc4_crtc_disable_at_boot(crtc);
 395
 396         ret = drm_dev_register(drm, 0);
 397         if (ret < 0)
 398                 goto err;
 399
 400         drm_client_setup_with_fourcc(drm, DRM_FORMAT_RGB565);
 401
 402         return 0;
 403
 404 err:
 405         platform_set_drvdata(pdev, NULL);
 406         return ret;
 407 }
 408
 409 static void vc4_drm_unbind(struct device *dev)
 410 {
 411         struct drm_device *drm = dev_get_drvdata(dev);
 412
 413         drm_dev_unplug(drm);
 414         drm_atomic_helper_shutdown(drm);
 415         dev_set_drvdata(dev, NULL);
 416 }
 417
 418 static const struct component_master_ops vc4_drm_ops = {
 419         .bind = vc4_drm_bind,
 420         .unbind = vc4_drm_unbind,
 421 };
 422
 423 /*
 424  * This list determines the binding order of our components, and we have
 425  * a few constraints:
 426  *   - The TXP driver needs to be bound before the PixelValves (CRTC)
 427  *     but after the HVS to set the possible_crtc field properly
 428  *   - The HDMI driver needs to be bound after the HVS so that we can
 429  *     lookup the HVS maximum core clock rate and figure out if we
 430  *     support 4kp60 or not.
 431  */
 432 static struct platform_driver *const component_drivers[] = {
 433         &vc4_hvs_driver,
 434         &vc4_hdmi_driver,
 435         &vc4_vec_driver,
 436         &vc4_dpi_driver,
 437         &vc4_dsi_driver,
 438         &vc4_txp_driver,
 439         &vc4_crtc_driver,
 440         &vc4_v3d_driver,
 441 };
 442
 443 static int vc4_platform_drm_probe(struct platform_device *pdev)
 444 {
 445         struct component_match *match = NULL;
 446         struct device *dev = &pdev->dev;
 447
 448         vc4_match_add_drivers(dev, &match,
 449                               component_drivers, ARRAY_SIZE(component_drivers));
 450
 451         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 452 }
 453
 454 static void vc4_platform_drm_remove(struct platform_device *pdev)
 455 {
 456         component_master_del(&pdev->dev, &vc4_drm_ops);
 457 }
 458
 459 static void vc4_platform_drm_shutdown(struct platform_device *pdev)
 460 {
 461         drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
 462 }
 463
 464 static const struct of_device_id vc4_of_match[] = {
 465         { .compatible = "brcm,bcm2711-vc5", },
 466         { .compatible = "brcm,bcm2835-vc4", },
 467         { .compatible = "brcm,cygnus-vc4", },
 468         {},
 469 };
 470 MODULE_DEVICE_TABLE(of, vc4_of_match);
 471
 472 static struct platform_driver vc4_platform_driver = {
 473         .probe          = vc4_platform_drm_probe,
 474         .remove         = vc4_platform_drm_remove,
 475         .shutdown       = vc4_platform_drm_shutdown,
 476         .driver         = {
 477                 .name   = "vc4-drm",
 478                 .of_match_table = vc4_of_match,
 479         },
 480 };
 481
 482 static int __init vc4_drm_register(void)
 483 {
 484         int ret;
 485
 486         if (drm_firmware_drivers_only())
 487                 return -ENODEV;
 488
 489         ret = platform_register_drivers(component_drivers,
 490                                         ARRAY_SIZE(component_drivers));
 491         if (ret)
 492                 return ret;
 493
 494         ret = platform_driver_register(&vc4_platform_driver);
 495         if (ret)
 496                 platform_unregister_drivers(component_drivers,
 497                                             ARRAY_SIZE(component_drivers));
 498
 499         return ret;
 500 }
 501
 502 static void __exit vc4_drm_unregister(void)
 503 {
 504         platform_unregister_drivers(component_drivers,
 505                                     ARRAY_SIZE(component_drivers));
 506         platform_driver_unregister(&vc4_platform_driver);
 507 }
 508
 509 module_init(vc4_drm_register);
 510 module_exit(vc4_drm_unregister);
 511
 512 MODULE_ALIAS("platform:vc4-drm");
 513 MODULE_SOFTDEP("pre: snd-soc-hdmi-codec");
 514 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 515 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 516 MODULE_LICENSE("GPL v2");