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[] = { DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565,
  15                                               DRM_FORMAT_XRGB8888, DRM_FORMAT_YVU420_ANDROID };
  16
  17 static int vgem_init(struct driver *drv)
  18 {
  19         return drv_add_linear_combinations(drv, supported_formats, ARRAY_SIZE(supported_formats));
  20 }
  21
  22 static int vgem_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
  23                           uint32_t flags)
  24 {
  25         int ret = drv_dumb_bo_create(bo, ALIGN(width, MESA_LLVMPIPE_TILE_SIZE),
  26                                      ALIGN(height, MESA_LLVMPIPE_TILE_SIZE), format, flags);
  27         return ret;
  28 }
  29
  30 static uint32_t vgem_resolve_format(uint32_t format)
  31 {
  32         switch (format) {
  33         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
  34                 /*HACK: See b/28671744 */
  35                 return DRM_FORMAT_XBGR8888;
  36         case DRM_FORMAT_FLEX_YCbCr_420_888:
  37                 return DRM_FORMAT_YVU420_ANDROID;
  38         default:
  39                 return format;
  40         }
  41 }
  42
  43 struct backend backend_vgem = {
  44         .name = "vgem",
  45         .init = vgem_init,
  46         .bo_create = vgem_bo_create,
  47         .bo_destroy = drv_dumb_bo_destroy,
  48         .bo_import = drv_prime_bo_import,
  49         .bo_map = drv_dumb_bo_map,
  50         .resolve_format = vgem_resolve_format,
  51 };