http://groups.google.com/group/linux.kernel/browse_thread/thread/d656dfef0d5b46d4
commit a7f014f2de04893f95cfe40fe35f15c8dae4b36e
Author: Eric Anholt <e...@anholt.net>
Date: Tue Nov 25 14:02:05 2008 -0800
drm/i915: Respect GM965/GM45 bit-17-instead-of-bit-11 option for
swizzling.
This fixes readpixels and buffer corruption when swapped out and in by
disabling tiling on them.
Now that we know that the bit 17 mode isn't just a mistake of older
chipsets,
we'll need to work on a clever fix so that we can get the performance of
tiling on these chipsets, but that will require intrusive changes targeted
at the next kernel release, not this one.
Signed-off-by: Eric Anholt <e...@anholt.net>
Signed-off-by: Dave Airlie <airl...@redhat.com>
--
[i945] 2.5.1 driver poor performance
https://bugs.launchpad.net/bugs/303011
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