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anv: Add want_hiz_wt_for_image()

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Backport-to: 24.2
Reviewed-by: Jianxun Zhang <jianxun.zhang@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29615>
This commit is contained in:
Nanley Chery 2021-09-20 15:03:27 -07:00 • committed by Marge Bot
parent 2553878fba
commit ebe3eabda6
1 changed files with 21 additions and 11 deletions
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32
src/intel/vulkan/anv_image.c
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@ -692,6 +692,26 @@ add_compression_control_buffer(struct anv_device *device,
&image->planes[plane].compr_ctrl_memory_range);
}
static bool
want_hiz_wt_for_image(const struct intel_device_info *devinfo,
const struct anv_image *image)
{
if (image->vk.samples > 1)
return false;
if ((image->vk.usage & (VK_IMAGE_USAGE_SAMPLED_BIT |
VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT)) == 0)
return false;
/* If this image is single-sampled and will be used as a texture,
* put the HiZ surface in write-through mode so that we can sample
* from it.
*
* TODO: This is a heuristic trade-off; we haven't tuned it at all.
*/
return true;
}
/**
* The return code indicates whether creation of the VkImage should continue
* or fail, not whether the creation of the aux surface succeeded. If the aux
@ -746,17 +766,7 @@ add_aux_surface_if_supported(struct anv_device *device,
&image->planes[plane].primary_surface.isl,
&image->planes[plane].aux_surface.isl)) {
image->planes[plane].aux_usage = ISL_AUX_USAGE_HIZ;
} else if (image->vk.usage & (VK_IMAGE_USAGE_SAMPLED_BIT |
VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT) &&
image->vk.samples == 1) {
/* If it's used as an input attachment or a texture and it's
* single-sampled (this is a requirement for HiZ+CCS write-through
* mode), use write-through mode so that we don't need to resolve
* before texturing. This will make depth testing a bit slower but
* texturing faster.
*
* TODO: This is a heuristic trade-off; we haven't tuned it at all.
*/
} else if (want_hiz_wt_for_image(device->info, image)) {
assert(device->info->ver >= 12);
image->planes[plane].aux_usage = ISL_AUX_USAGE_HIZ_CCS_WT;
} else {