Nouveau - Jan 2014 - [Bug 36090] [NV34] [NV49] terminal's visual bell is very slow with nouveau

https://bugs.freedesktop.org/show_bug.cgi?id=36090

--- Comment #13 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Looking into EXA a bit, there's a EXASolid impl shared by all pre-nv50
cards.
One of the things it apparently doesn't handle are 32-bit visuals with solid
draws that include a fancy "op", which I assume the visual bell would,
like xor
or whatever. I have a hard time believing this restriction holds, so I'm
going
to try removing it on some cards I have (at some point).

If you guys want to play around with it, I'm talking about the

        if (ppix->drawable.bitsPerPixel == 32)
            return FALSE;

in NV04EXASetROP. Something causing NV04EXAPrepareSolid to return false would
definitely explain the fallback to fbSolid.

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