dri_generic_driver.c

   1 /*
   2  * Copyright 2020 The Chromium OS Authors. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6
   7 #ifdef DRI_GENERIC_DRV
   8
   9 #include <string.h>
  10 #include <xf86drm.h>
  11
  12 #include "dri.h"
  13 #include "drv_priv.h"
  14 #include "helpers.h"
  15 #include "util.h"
  16 #include <errno.h>
  17
  18 static const uint32_t scanout_render_formats[] = { DRM_FORMAT_ARGB8888, DRM_FORMAT_XRGB8888,
  19                                                    DRM_FORMAT_ABGR8888, DRM_FORMAT_XBGR8888,
  20                                                    DRM_FORMAT_RGB565 };
  21
  22 static const uint32_t texture_only_formats[] = { DRM_FORMAT_NV12, DRM_FORMAT_NV21,
  23                                                  DRM_FORMAT_YVU420, DRM_FORMAT_YVU420_ANDROID };
  24
  25 static int dri_generic_init(struct driver *drv)
  26 {
  27         struct dri_driver *dri;
  28
  29         dri = calloc(1, sizeof(struct dri_driver));
  30         if (!dri)
  31                 return -ENOMEM;
  32
  33         drv->priv = dri;
  34
  35         if (dri_init2(drv)) {
  36                 free(dri);
  37                 drv->priv = NULL;
  38                 return -ENODEV;
  39         }
  40
  41         drv_add_combinations(drv, scanout_render_formats, ARRAY_SIZE(scanout_render_formats),
  42                              &LINEAR_METADATA, BO_USE_RENDER_MASK | BO_USE_SCANOUT);
  43
  44         drv_add_combinations(drv, texture_only_formats, ARRAY_SIZE(texture_only_formats),
  45                              &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
  46
  47         drv_modify_combination(drv, DRM_FORMAT_NV12, &LINEAR_METADATA,
  48                                BO_USE_HW_VIDEO_ENCODER | BO_USE_HW_VIDEO_DECODER |
  49                                    BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE);
  50         drv_modify_combination(drv, DRM_FORMAT_NV21, &LINEAR_METADATA, BO_USE_HW_VIDEO_ENCODER);
  51
  52         return drv_modify_linear_combinations(drv);
  53 }
  54
  55 static uint32_t dri_generic_resolve_format(struct driver *drv, uint32_t format, uint64_t use_flags)
  56 {
  57         switch (format) {
  58         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
  59                 /* Camera subsystem requires NV12. */
  60                 if (use_flags & (BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE))
  61                         return DRM_FORMAT_NV12;
  62                 /*HACK: See b/28671744 */
  63                 return DRM_FORMAT_XBGR8888;
  64         case DRM_FORMAT_FLEX_YCbCr_420_888:
  65                 return DRM_FORMAT_NV12;
  66         case DRM_FORMAT_BGR565:
  67                 /* mesa3d doesn't support BGR565 */
  68                 return DRM_FORMAT_RGB565;
  69         default:
  70                 return format;
  71         }
  72 }
  73
  74 const struct backend backend_dri_generic = {
  75         .name = "dri_generic",
  76         .init = dri_generic_init,
  77         .close = dri_close,
  78         .bo_create = dri_bo_create,
  79         .bo_create_with_modifiers = dri_bo_create_with_modifiers,
  80         .bo_destroy = dri_bo_destroy,
  81         .bo_import = dri_bo_import,
  82         .bo_map = dri_bo_map,
  83         .bo_unmap = dri_bo_unmap,
  84         .bo_get_plane_fd = dri_bo_get_plane_fd,
  85         .resolve_format = dri_generic_resolve_format,
  86         .num_planes_from_modifier = dri_num_planes_from_modifier,
  87 };
  88
  89 #endif