[Mesa-dev] [PATCH] intel/i965: Disable SampleAlphaToOne if dual source blending enabled

[Eric Anholt]

Anuj Phogat <anuj.phogat at gmail.com> writes:

> From SandyBridge PRM, volume 2 Part 1, section 12.2.3, BLEND_STATE:
> DWord 1, Bit 30 (AlphaToOne Enable):
> "If Dual Source Blending is enabled, this bit must be disabled"

This is the sort of thing I wish we had a WARN_ON_ONCE macro for.  It's
really obscure, but if someone crazy app stumbles over it some day it
would be nice to have a note.

Still,

Reviewed-by: Eric Anholt <eric at anholt.net>
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