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drm/radeon: Fix sideport problems on certain RS690 boards
authorAlex Deucher <alexander.deucher@amd.com>
Mon, 2 Dec 2013 23:15:51 +0000 (18:15 -0500)
committerAlex Deucher <alexander.deucher@amd.com>
Thu, 12 Dec 2013 13:34:40 +0000 (08:34 -0500)
Some RS690 boards with 64MB of sideport memory show up as
having 128MB sideport + 256MB of UMA.  In this case,
just skip the sideport memory and use UMA.  This fixes
rendering corruption and should improve performance.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=35457

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

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