vgem.c

   1 /*
   2  * Copyright 2016 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 #include "drv_priv.h"
   8 #include "helpers.h"
   9 #include "util.h"
  10
  11 #define MESA_LLVMPIPE_TILE_ORDER 6
  12 #define MESA_LLVMPIPE_TILE_SIZE (1 << MESA_LLVMPIPE_TILE_ORDER)
  13
  14 static const uint32_t supported_formats[] = {
  15         DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565, DRM_FORMAT_XRGB8888,
  16         DRM_FORMAT_YVU420_ANDROID
  17 };
  18
  19 static int vgem_init(struct driver *drv)
  20 {
  21         return drv_add_linear_combinations(drv, supported_formats,
  22                                            ARRAY_SIZE(supported_formats));
  23 }
  24
  25 static int vgem_bo_create(struct bo *bo, uint32_t width, uint32_t height,
  26                           uint32_t format, uint32_t flags)
  27 {
  28         int ret = drv_dumb_bo_create(bo, ALIGN(width, MESA_LLVMPIPE_TILE_SIZE),
  29                                      ALIGN(height, MESA_LLVMPIPE_TILE_SIZE),
  30                                      format, flags);
  31         return ret;
  32 }
  33
  34 static uint32_t vgem_resolve_format(uint32_t format)
  35 {
  36         switch (format) {
  37         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
  38                 /*HACK: See b/28671744 */
  39                 return DRM_FORMAT_XBGR8888;
  40         case DRM_FORMAT_FLEX_YCbCr_420_888:
  41                 return DRM_FORMAT_YVU420_ANDROID;
  42         default:
  43                 return format;
  44         }
  45 }
  46
  47 struct backend backend_vgem =
  48 {
  49         .name = "vgem",
  50         .init = vgem_init,
  51         .bo_create = vgem_bo_create,
  52         .bo_destroy = drv_dumb_bo_destroy,
  53         .bo_import = drv_prime_bo_import,
  54         .bo_map = drv_dumb_bo_map,
  55         .resolve_format = vgem_resolve_format,
  56 };
  57