A8_UNORM on v9+ is using RGBA8_UNORM as a pixel format with the
A8_UNORM clump format to dealing with the diffences between
RGBA8 and the actual A8 in-memory layout.
The problem is, LEA_TEX only loads the InternalConversionDescriptor
which contains only the pixel format, and that's what ST_CVT uses
to do the conversion, so we'll actually store 4 components instead
of one.
This shows up with
dEQP-VK.image.load_store.without_any_format.buffer.a8_unorm* after
enabling maintenance5.
For now I've turned off the image storage capability for A8_UNORM
on all gens, but I'd be fine disabling it only on v9+ if you think
that's preferable.
Fixes: d95423686f ("pan/format: Add PAN_BIND_STORAGE_IMAGE flag")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34648>
(cherry picked from commit 9d1262e108)
518f052e98