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 struct supported_combination combos[4] = {
  15         {DRM_FORMAT_ABGR8888, DRM_FORMAT_MOD_NONE,
  16                 BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN |
  17                 BO_USE_SW_WRITE_OFTEN | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  18         {DRM_FORMAT_RGB565, DRM_FORMAT_MOD_NONE,
  19                 BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN |
  20                 BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  21         {DRM_FORMAT_XBGR8888, DRM_FORMAT_MOD_NONE,
  22                 BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN |
  23                 BO_USE_SW_WRITE_OFTEN | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  24         {DRM_FORMAT_YVU420, DRM_FORMAT_MOD_NONE,
  25                 BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN |
  26                 BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  27 };
  28
  29 static int vgem_init(struct driver *drv)
  30 {
  31         drv_insert_combinations(drv, combos, ARRAY_SIZE(combos));
  32         return 0;
  33 }
  34
  35 static int vgem_bo_create(struct bo *bo, uint32_t width, uint32_t height,
  36                           uint32_t format, uint32_t flags)
  37 {
  38         int ret = drv_dumb_bo_create(bo, ALIGN(width, MESA_LLVMPIPE_TILE_SIZE),
  39                                      ALIGN(height, MESA_LLVMPIPE_TILE_SIZE),
  40                                      format, flags);
  41         bo->width = width;
  42         bo->height = height;
  43
  44         return ret;
  45 }
  46
  47 static uint32_t vgem_resolve_format(uint32_t format)
  48 {
  49         switch (format) {
  50         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
  51                 /*HACK: See b/28671744 */
  52                 return DRM_FORMAT_XBGR8888;
  53         case DRM_FORMAT_FLEX_YCbCr_420_888:
  54                 return DRM_FORMAT_YVU420;
  55         default:
  56                 return format;
  57         }
  58 }
  59
  60 struct backend backend_vgem =
  61 {
  62         .name = "vgem",
  63         .init = vgem_init,
  64         .bo_create = vgem_bo_create,
  65         .bo_destroy = drv_dumb_bo_destroy,
  66         .bo_map = drv_dumb_bo_map,
  67         .resolve_format = vgem_resolve_format,
  68 };
  69