[Bug 17897] [Patch] Enable dithering on RV530 lcds

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=17897





--- Comment #12 from Fabio <fabio.ped at libero.it>  2008-10-13 04:18:53 PST ---
I tried the latest patch:
1) with the unmodified patch the banding is fixed, however there are some areas
(where there is the colour transition) where the colour is not uniform (like if
there were some random noise overlapped);
2) with the uncommented
//lvtma_bit_depth_control &= ~AVIVO_LVTMA_BIT_DEPTH_CONTROL_SPATIAL_DITHER_EN;
the problem is also greatly fixed (I can see very little visible banding
looking closer, but I think this is how the image is really) without the noise
overlap. Trying to look the same image on an intel graphic card I get the same
behaviour.

I think the second one (with the uncommented line) should be preferred as it is
similar to the intel card and also looks subjectively better.

Thanks for all your work on fixing this problem.


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