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1633c9735a
Stencil texture sampling (such as what we have to do for BlitFramebuffer) is broken with UBWC enabled. We can't just take the fd_resource_uncompress() path, because that's a blit just like BlitFramebuffer. Fixes failure in dEQP-GLES3.functional.fbo.msaa.2_samples.stencil_index8, but also the uncaught rendering fails of 4_samples.stencil_index8 and depth24_stencil8. Prior to "911ce374caf0 freedreno/a6xx: Fix MSAA clear" we would usually pass and sometimes flake fail on this test occasionally, thus it being listed as a flake (though the rendering was actually broken). Since that commit, though, we consistently fail on a pixel of the broken rendering, and thus this was brought to my attention by the #freedreno-ci channel spam. Rob took a look at the performance impact of this, and the worst was maybe up to .5% fps hit on trex. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8319> |
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