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 "uapi/drm/vc4_drm.h"
  41
  42 #include "vc4_drv.h"
  43 #include "vc4_regs.h"
  44
  45 #define DRIVER_NAME "vc4"
  46 #define DRIVER_DESC "Broadcom VC4 graphics"
  47 #define DRIVER_DATE "20140616"
  48 #define DRIVER_MAJOR 0
  49 #define DRIVER_MINOR 0
  50 #define DRIVER_PATCHLEVEL 0
  51
  52 /* Helper function for mapping the regs on a platform device. */
  53 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
  54 {
  55         struct resource *res;
  56         void __iomem *map;
  57
  58         res = platform_get_resource(dev, IORESOURCE_MEM, index);
  59         map = devm_ioremap_resource(&dev->dev, res);
  60         if (IS_ERR(map))
  61                 return map;
  62
  63         return map;
  64 }
  65
  66 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
  67                                struct drm_file *file_priv)
  68 {
  69         struct vc4_dev *vc4 = to_vc4_dev(dev);
  70         struct drm_vc4_get_param *args = data;
  71         int ret;
  72
  73         if (args->pad != 0)
  74                 return -EINVAL;
  75
  76         if (!vc4->v3d)
  77                 return -ENODEV;
  78
  79         switch (args->param) {
  80         case DRM_VC4_PARAM_V3D_IDENT0:
  81                 ret = vc4_v3d_pm_get(vc4);
  82                 if (ret)
  83                         return ret;
  84                 args->value = V3D_READ(V3D_IDENT0);
  85                 vc4_v3d_pm_put(vc4);
  86                 break;
  87         case DRM_VC4_PARAM_V3D_IDENT1:
  88                 ret = vc4_v3d_pm_get(vc4);
  89                 if (ret)
  90                         return ret;
  91                 args->value = V3D_READ(V3D_IDENT1);
  92                 vc4_v3d_pm_put(vc4);
  93                 break;
  94         case DRM_VC4_PARAM_V3D_IDENT2:
  95                 ret = vc4_v3d_pm_get(vc4);
  96                 if (ret)
  97                         return ret;
  98                 args->value = V3D_READ(V3D_IDENT2);
  99                 vc4_v3d_pm_put(vc4);
 100                 break;
 101         case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
 102         case DRM_VC4_PARAM_SUPPORTS_ETC1:
 103         case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
 104         case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
 105         case DRM_VC4_PARAM_SUPPORTS_MADVISE:
 106         case DRM_VC4_PARAM_SUPPORTS_PERFMON:
 107                 args->value = true;
 108                 break;
 109         default:
 110                 DRM_DEBUG("Unknown parameter %d\n", args->param);
 111                 return -EINVAL;
 112         }
 113
 114         return 0;
 115 }
 116
 117 static int vc4_open(struct drm_device *dev, struct drm_file *file)
 118 {
 119         struct vc4_file *vc4file;
 120
 121         vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
 122         if (!vc4file)
 123                 return -ENOMEM;
 124
 125         vc4_perfmon_open_file(vc4file);
 126         file->driver_priv = vc4file;
 127         return 0;
 128 }
 129
 130 static void vc4_close(struct drm_device *dev, struct drm_file *file)
 131 {
 132         struct vc4_dev *vc4 = to_vc4_dev(dev);
 133         struct vc4_file *vc4file = file->driver_priv;
 134
 135         if (vc4file->bin_bo_used)
 136                 vc4_v3d_bin_bo_put(vc4);
 137
 138         vc4_perfmon_close_file(vc4file);
 139         kfree(vc4file);
 140 }
 141
 142 DEFINE_DRM_GEM_FOPS(vc4_drm_fops);
 143
 144 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
 145         DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
 146         DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
 147         DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
 148         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
 149         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
 150         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
 151         DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
 152                           DRM_ROOT_ONLY),
 153         DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
 154         DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
 155         DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
 156         DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
 157         DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
 158         DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
 159         DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
 160         DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
 161 };
 162
 163 static struct drm_driver vc4_drm_driver = {
 164         .driver_features = (DRIVER_MODESET |
 165                             DRIVER_ATOMIC |
 166                             DRIVER_GEM |
 167                             DRIVER_RENDER |
 168                             DRIVER_SYNCOBJ),
 169         .open = vc4_open,
 170         .postclose = vc4_close,
 171
 172 #if defined(CONFIG_DEBUG_FS)
 173         .debugfs_init = vc4_debugfs_init,
 174 #endif
 175
 176         .gem_create_object = vc4_create_object,
 177
 178         DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(vc4_dumb_create),
 179
 180         .ioctls = vc4_drm_ioctls,
 181         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
 182         .fops = &vc4_drm_fops,
 183
 184         .name = DRIVER_NAME,
 185         .desc = DRIVER_DESC,
 186         .date = DRIVER_DATE,
 187         .major = DRIVER_MAJOR,
 188         .minor = DRIVER_MINOR,
 189         .patchlevel = DRIVER_PATCHLEVEL,
 190 };
 191
 192 static int compare_dev(struct device *dev, void *data)
 193 {
 194         return dev == data;
 195 }
 196
 197 static void vc4_match_add_drivers(struct device *dev,
 198                                   struct component_match **match,
 199                                   struct platform_driver *const *drivers,
 200                                   int count)
 201 {
 202         int i;
 203
 204         for (i = 0; i < count; i++) {
 205                 struct device_driver *drv = &drivers[i]->driver;
 206                 struct device *p = NULL, *d;
 207
 208                 while ((d = platform_find_device_by_driver(p, drv))) {
 209                         put_device(p);
 210                         component_match_add(dev, match, compare_dev, d);
 211                         p = d;
 212                 }
 213                 put_device(p);
 214         }
 215 }
 216
 217 static int vc4_drm_bind(struct device *dev)
 218 {
 219         struct platform_device *pdev = to_platform_device(dev);
 220         struct drm_device *drm;
 221         struct vc4_dev *vc4;
 222         struct device_node *node;
 223         struct drm_crtc *crtc;
 224         int ret = 0;
 225
 226         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 227
 228         /* If VC4 V3D is missing, don't advertise render nodes. */
 229         node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL);
 230         if (!node || !of_device_is_available(node))
 231                 vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
 232         of_node_put(node);
 233
 234         vc4 = devm_drm_dev_alloc(dev, &vc4_drm_driver, struct vc4_dev, base);
 235         if (IS_ERR(vc4))
 236                 return PTR_ERR(vc4);
 237
 238         drm = &vc4->base;
 239         platform_set_drvdata(pdev, drm);
 240         INIT_LIST_HEAD(&vc4->debugfs_list);
 241
 242         mutex_init(&vc4->bin_bo_lock);
 243
 244         ret = vc4_bo_cache_init(drm);
 245         if (ret)
 246                 return ret;
 247
 248         ret = drmm_mode_config_init(drm);
 249         if (ret)
 250                 return ret;
 251
 252         ret = vc4_gem_init(drm);
 253         if (ret)
 254                 return ret;
 255
 256         ret = component_bind_all(dev, drm);
 257         if (ret)
 258                 return ret;
 259
 260         ret = vc4_plane_create_additional_planes(drm);
 261         if (ret)
 262                 goto unbind_all;
 263
 264         ret = drm_aperture_remove_framebuffers(false, &vc4_drm_driver);
 265         if (ret)
 266                 goto unbind_all;
 267
 268         ret = vc4_kms_load(drm);
 269         if (ret < 0)
 270                 goto unbind_all;
 271
 272         drm_for_each_crtc(crtc, drm)
 273                 vc4_crtc_disable_at_boot(crtc);
 274
 275         ret = drm_dev_register(drm, 0);
 276         if (ret < 0)
 277                 goto unbind_all;
 278
 279         drm_fbdev_generic_setup(drm, 16);
 280
 281         return 0;
 282
 283 unbind_all:
 284         component_unbind_all(dev, drm);
 285
 286         return ret;
 287 }
 288
 289 static void vc4_drm_unbind(struct device *dev)
 290 {
 291         struct drm_device *drm = dev_get_drvdata(dev);
 292
 293         drm_dev_unregister(drm);
 294
 295         drm_atomic_helper_shutdown(drm);
 296 }
 297
 298 static const struct component_master_ops vc4_drm_ops = {
 299         .bind = vc4_drm_bind,
 300         .unbind = vc4_drm_unbind,
 301 };
 302
 303 /*
 304  * This list determines the binding order of our components, and we have
 305  * a few constraints:
 306  *   - The TXP driver needs to be bound before the PixelValves (CRTC)
 307  *     but after the HVS to set the possible_crtc field properly
 308  *   - The HDMI driver needs to be bound after the HVS so that we can
 309  *     lookup the HVS maximum core clock rate and figure out if we
 310  *     support 4kp60 or not.
 311  */
 312 static struct platform_driver *const component_drivers[] = {
 313         &vc4_hvs_driver,
 314         &vc4_hdmi_driver,
 315         &vc4_vec_driver,
 316         &vc4_dpi_driver,
 317         &vc4_dsi_driver,
 318         &vc4_txp_driver,
 319         &vc4_crtc_driver,
 320         &vc4_v3d_driver,
 321 };
 322
 323 static int vc4_platform_drm_probe(struct platform_device *pdev)
 324 {
 325         struct component_match *match = NULL;
 326         struct device *dev = &pdev->dev;
 327
 328         vc4_match_add_drivers(dev, &match,
 329                               component_drivers, ARRAY_SIZE(component_drivers));
 330
 331         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 332 }
 333
 334 static int vc4_platform_drm_remove(struct platform_device *pdev)
 335 {
 336         component_master_del(&pdev->dev, &vc4_drm_ops);
 337
 338         return 0;
 339 }
 340
 341 static const struct of_device_id vc4_of_match[] = {
 342         { .compatible = "brcm,bcm2711-vc5", },
 343         { .compatible = "brcm,bcm2835-vc4", },
 344         { .compatible = "brcm,cygnus-vc4", },
 345         {},
 346 };
 347 MODULE_DEVICE_TABLE(of, vc4_of_match);
 348
 349 static struct platform_driver vc4_platform_driver = {
 350         .probe          = vc4_platform_drm_probe,
 351         .remove         = vc4_platform_drm_remove,
 352         .driver         = {
 353                 .name   = "vc4-drm",
 354                 .of_match_table = vc4_of_match,
 355         },
 356 };
 357
 358 static int __init vc4_drm_register(void)
 359 {
 360         int ret;
 361
 362         ret = platform_register_drivers(component_drivers,
 363                                         ARRAY_SIZE(component_drivers));
 364         if (ret)
 365                 return ret;
 366
 367         return platform_driver_register(&vc4_platform_driver);
 368 }
 369
 370 static void __exit vc4_drm_unregister(void)
 371 {
 372         platform_unregister_drivers(component_drivers,
 373                                     ARRAY_SIZE(component_drivers));
 374         platform_driver_unregister(&vc4_platform_driver);
 375 }
 376
 377 module_init(vc4_drm_register);
 378 module_exit(vc4_drm_unregister);
 379
 380 MODULE_ALIAS("platform:vc4-drm");
 381 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 382 MODULE_AUTHOR("Eric Anholt <[email protected]>");
 383 MODULE_LICENSE("GPL v2");