commit
37d4174d2d252c37dcb3d88cafae488542087848 upstream.
Seems to be more stable on certain monitors.
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=48880
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
[bwh: Backported to 3.2: drop the ASIC_IS_DCE61() case]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>