virtio_gpu.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_ABGR8888, DRM_FORMAT_ARGB8888,
  15                                               DRM_FORMAT_R8,       DRM_FORMAT_RGB565,
  16                                               DRM_FORMAT_XBGR8888, DRM_FORMAT_XRGB8888,
  17                                               DRM_FORMAT_YVU420,   DRM_FORMAT_YVU420_ANDROID };
  18
  19 static int virtio_gpu_init(struct driver *drv)
  20 {
  21         return drv_add_linear_combinations(drv, supported_formats, ARRAY_SIZE(supported_formats));
  22 }
  23
  24 static int virtio_gpu_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
  25                                 uint32_t flags)
  26 {
  27         int ret = drv_dumb_bo_create(bo, ALIGN(width, MESA_LLVMPIPE_TILE_SIZE),
  28                                      ALIGN(height, MESA_LLVMPIPE_TILE_SIZE), format, flags);
  29         return ret;
  30 }
  31
  32 static uint32_t virtio_gpu_resolve_format(uint32_t format)
  33 {
  34         switch (format) {
  35         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
  36                 /*HACK: See b/28671744 */
  37                 return DRM_FORMAT_XBGR8888;
  38         case DRM_FORMAT_FLEX_YCbCr_420_888:
  39                 return DRM_FORMAT_YVU420_ANDROID;
  40         default:
  41                 return format;
  42         }
  43 }
  44
  45 struct backend backend_virtio_gpu = {
  46         .name = "virtio_gpu",
  47         .init = virtio_gpu_init,
  48         .bo_create = virtio_gpu_bo_create,
  49         .bo_destroy = drv_dumb_bo_destroy,
  50         .bo_import = drv_prime_bo_import,
  51         .bo_map = drv_dumb_bo_map,
  52         .resolve_format = virtio_gpu_resolve_format,
  53 };