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Commit 296c04d7 authored by Danylo Piliaiev's avatar Danylo Piliaiev :flag_ua:
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intel/fs: Work around dual-source blending hangs in combination with SIMD16

It was found that dual-source blending hangs with SIMD16 dispatch in some
specific but unknown situation. Which in the wild happen when rgba
anti-aliasing is enabled for fonts.

Cc: <mesa-stable@lists.freedesktop.org>
Closes: mesa/mesa#2183


Signed-off-by: default avatarDanylo Piliaiev <danylo.piliaiev@globallogic.com>
Reviewed-by: default avatarLionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <mesa/mesa!5037>
parent dd2bd68f
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......@@ -548,9 +548,13 @@ fs_visitor::emit_fb_writes()
* XXX - Emit an extra single-source NULL RT-write marked LastRT in
* order to release the thread dependency without disabling
* SIMD32.
*
* The dual-source RT write messages may lead to hangs with SIMD16
* dispatch on ICL due some unknown reasons, see
* https://gitlab.freedesktop.org/mesa/mesa/-/issues/2183
*/
limit_dispatch_width(16, "Dual source blending unsupported "
"in SIMD32 mode.\n");
limit_dispatch_width(8, "Dual source blending unsupported "
"in SIMD16 and SIMD32 modes.\n");
}
}
......
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