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 };
  17
  18 static int vgem_init(struct driver *drv)
  19 {
  20         return drv_add_linear_combinations(drv, supported_formats,
  21                                            ARRAY_SIZE(supported_formats));
  22 }
  23
  24 static int vgem_bo_create(struct bo *bo, uint32_t width, uint32_t height,
  25                           uint32_t format, 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),
  29                                      format, flags);
  30         bo->width = width;
  31         bo->height = height;
  32
  33         return ret;
  34 }
  35
  36 static uint32_t vgem_resolve_format(uint32_t format)
  37 {
  38         switch (format) {
  39         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
  40                 /*HACK: See b/28671744 */
  41                 return DRM_FORMAT_XBGR8888;
  42         case DRM_FORMAT_FLEX_YCbCr_420_888:
  43                 return DRM_FORMAT_YVU420;
  44         default:
  45                 return format;
  46         }
  47 }
  48
  49 struct backend backend_vgem =
  50 {
  51         .name = "vgem",
  52         .init = vgem_init,
  53         .bo_create = vgem_bo_create,
  54         .bo_destroy = drv_dumb_bo_destroy,
  55         .bo_import = drv_prime_bo_import,
  56         .bo_map = drv_dumb_bo_map,
  57         .resolve_format = vgem_resolve_format,
  58 };
  59