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

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