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 render_target_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888,
  15                                                   DRM_FORMAT_RGB565, DRM_FORMAT_XBGR8888,
  16                                                   DRM_FORMAT_XRGB8888 };
  17
  18 static const uint32_t texture_source_formats[] = { DRM_FORMAT_R8, DRM_FORMAT_YVU420,
  19                                                    DRM_FORMAT_YVU420_ANDROID };
  20
  21 static int vgem_init(struct driver *drv)
  22 {
  23         drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
  24                              &LINEAR_METADATA, BO_USE_RENDER_MASK);
  25
  26         drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
  27                              &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
  28
  29         return drv_modify_linear_combinations(drv);
  30 }
  31
  32 static int vgem_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
  33                           uint64_t flags)
  34 {
  35         width = ALIGN(width, MESA_LLVMPIPE_TILE_SIZE);
  36         height = ALIGN(height, MESA_LLVMPIPE_TILE_SIZE);
  37
  38         /* HAL_PIXEL_FORMAT_YV12 requires that the buffer's height not be aligned. */
  39         if (bo->format == DRM_FORMAT_YVU420_ANDROID)
  40                 height = bo->height;
  41
  42         return drv_dumb_bo_create(bo, width, height, format, flags);
  43 }
  44
  45 static uint32_t vgem_resolve_format(uint32_t format, uint64_t flags)
  46 {
  47         switch (format) {
  48         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
  49                 /*HACK: See b/28671744 */
  50                 return DRM_FORMAT_XBGR8888;
  51         case DRM_FORMAT_FLEX_YCbCr_420_888:
  52                 return DRM_FORMAT_YVU420;
  53         default:
  54                 return format;
  55         }
  56 }
  57
  58 const struct backend backend_vgem = {
  59         .name = "vgem",
  60         .init = vgem_init,
  61         .bo_create = vgem_bo_create,
  62         .bo_destroy = drv_dumb_bo_destroy,
  63         .bo_import = drv_prime_bo_import,
  64         .bo_map = drv_dumb_bo_map,
  65         .bo_unmap = drv_bo_munmap,
  66         .resolve_format = vgem_resolve_format,
  67 };