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drm/radeon/kms/r7xx: add workaround for hw issue with HDP flush
authorAlex Deucher <alexdeucher@gmail.com>
Mon, 26 Jul 2010 22:51:53 +0000 (18:51 -0400)
committerDave Airlie <airlied@redhat.com>
Mon, 2 Aug 2010 00:06:18 +0000 (10:06 +1000)
Use of HDP_*_COHERENCY_FLUSH_CNTL can cause a hang in certain
situations.  Add workaround.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

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