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nil: Don't claim texture support for 2-bit SNORM

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24326>
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Faith Ekstrand 2023-01-30 20:11:57 -06:00 • committed by Marge Bot
parent 1e3e00dad7
commit 33ed4b9bc5
1 changed files with 9 additions and 0 deletions
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9
src/nouveau/nil/nil_format.c
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@ -362,6 +362,15 @@ nil_format_supports_texturing(struct nouveau_ws_device *dev,
if (!(fmt->support & NIL_FORMAT_SUPPORTS_TEXTURE_BIT))
return false;
/* The image/texture hardware doesn't clamp 2-bit SNORM alpha components to
* [-1, 1] which is out-of-spec according to Vulkan. Fortunately, as of
* September 14, 2022, according to vulkan.gpuinfo.org, these formats are
* only supported by lavapipe and a handful of mobile phones.
*/
if (fmt->tic.comp_sizes == NV9097_TEXHEAD0_COMPONENT_SIZES_A2B10G10R10 &&
fmt->tic.type_r == NV9097_TEXHEAD0_A_DATA_TYPE_NUM_SNORM)
return false;
const struct util_format_description *desc = util_format_description(format);
if (desc->layout == UTIL_FORMAT_LAYOUT_ETC ||
desc->layout == UTIL_FORMAT_LAYOUT_ASTC) {