drm/radeon/kms: disable writeback on pre-R300 asics
commit7ca755c00ad8f97fea8b06dac6d69e2aaa6c7a3d
authorAlex Deucher <alexander.deucher@amd.com>
Tue, 3 Jan 2012 14:48:38 +0000 (3 09:48 -0500)
committerGreg Kroah-Hartman <gregkh@suse.de>
Thu, 26 Jan 2012 00:13:12 +0000 (25 16:13 -0800)
tree3d26117f3cfd598bf37b3e2ac938b34e8fcabc78
parentd21e9677f82d619967c6c918038343fe12bb0f4a
drm/radeon/kms: disable writeback on pre-R300 asics

commit 28eebb703e28bc455ba704adb1026f76649b768c upstream.

We often end up missing fences on older asics with
writeback enabled which leads to delays in the userspace
accel code, so just disable it by default on those asics.

Reported-by: Helge Deller <deller@gmx.de>
Reported-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/gpu/drm/radeon/radeon_device.c