drm/radeon/kms: disable writeback on pre-R300 asics
commita674b8b3e345496a96aec389446650455b2fdfa1
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 01:24:35 +0000 (25 17:24 -0800)
tree5bd47c2bcfdb68a9f6aa9de38ae3eed0b8e5bbca
parentb48620dfff7a12774bb83348a88eddb5921dcdd2
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