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authorAlex Deucher <alexander.deucher@amd.com>2012-01-03 09:48:38 -0500
committerDave Airlie <airlied@redhat.com>2012-01-05 10:07:10 +0000
commit28eebb703e28bc455ba704adb1026f76649b768c (patch)
treec6e22d33e869d42d7d441ddc44c7e4bf2008d28b /drivers/gpu
parentc1341e52802ab401be7addb55408e23307f9074b (diff)
downloadop-kernel-dev-28eebb703e28bc455ba704adb1026f76649b768c.zip
op-kernel-dev-28eebb703e28bc455ba704adb1026f76649b768c.tar.gz
drm/radeon/kms: disable writeback on pre-R300 asics
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> Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/radeon/radeon_device.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 846eeb8..79b08b4 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -224,8 +224,11 @@ int radeon_wb_init(struct radeon_device *rdev)
if (radeon_no_wb == 1)
rdev->wb.enabled = false;
else {
- /* often unreliable on AGP */
if (rdev->flags & RADEON_IS_AGP) {
+ /* often unreliable on AGP */
+ rdev->wb.enabled = false;
+ } else if (rdev->family < CHIP_R300) {
+ /* often unreliable on pre-r300 */
rdev->wb.enabled = false;
} else {
rdev->wb.enabled = true;
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