drm/radeon/kms: disable writeback on pre-R300 asics
commit76adb0e340dc36dd931c1a8bd4c7b97f77b7d23a
authorAlex Deucher <alexander.deucher@amd.com>
Tue, 3 Jan 2012 14:48:38 +0000 (3 09:48 -0500)
committerGreg Kroah-Hartman <gregkh@suse.de>
Wed, 18 Jan 2012 15:31:54 +0000 (18 07:31 -0800)
treedb3ccc1a692729a655b21d87b0e394152f058830
parentf2f565fdcac7663c89421f5ace3826d4c84f2889
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