iris: Fix fast-clears of swizzled LA formats
Resources with luminance alpha formats that are mapped to RG are
fast-cleared with the wrong clear color.
When such resources with are cleared via iris_clear_texture,
isl_color_value_unpack places channel data in the R and G channels.
convert_fast_clear_color then overwrites the G channel with R.
Delete the clear color override that's specific to luminance alpha
formats.
Enables iris to pass the "LA" case of the fcc-clear-tex piglit test.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7345>
1 file changed
