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