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vk/image: Linear stencil buffers are illegal

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The hardware requires that stencil buffer memory be W-tiled.

From the Sandybridge PRM:
   This buffer is supported only in Tile W memory.
This commit is contained in:
Chad Versace 2015-08-28 08:04:59 -07:00
parent 14e1d58fb7
commit 053d32d2a5
1 changed files with 20 additions and 6 deletions
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26
src/vulkan/anv_image.c
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@ -103,20 +103,32 @@ static const struct anv_tile_info {
[WMAJOR] = { 128, 32, 4096 },
};
static uint32_t
/**
* Return -1 on failure.
*/
static int8_t
anv_image_choose_tile_mode(const struct anv_image_create_info *anv_info)
{
if (anv_info->force_tile_mode)
return anv_info->tile_mode;
if (anv_info->vk_info->format == VK_FORMAT_S8_UINT)
return WMAJOR;
/* The Sandybridge PRM says that the stencil buffer "is supported
* only in Tile W memory".
*/
switch (anv_info->vk_info->tiling) {
case VK_IMAGE_TILING_LINEAR:
return LINEAR;
if (unlikely(anv_info->vk_info->format == VK_FORMAT_S8_UINT)) {
return -1;
} else {
return LINEAR;
}
case VK_IMAGE_TILING_OPTIMAL:
return YMAJOR;
if (unlikely(anv_info->vk_info->format == VK_FORMAT_S8_UINT)) {
return WMAJOR;
} else {
return YMAJOR;
}
default:
assert(!"bad VKImageTiling");
return LINEAR;
@ -143,7 +155,9 @@ anv_image_make_surface(const struct anv_image_create_info *create_info,
const uint32_t levels = create_info->vk_info->mipLevels;
const uint32_t array_size = create_info->vk_info->arraySize;
const uint8_t tile_mode = anv_image_choose_tile_mode(create_info);
const int8_t tile_mode = anv_image_choose_tile_mode(create_info);
if (tile_mode == -1)
return vk_error(VK_ERROR_INVALID_IMAGE);
const struct anv_tile_info *tile_info =
&anv_tile_info_table[tile_mode];