Messages in this thread Patch in this message | | | Date | Mon, 23 Jan 2012 18:33:58 -0800 | From | Greg KH <> | Subject | [018/129] drm/radeon/kms: disable writeback on pre-R300 asics |
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3.2-stable review patch. If anyone has any objections, please let me know.
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From: Alex Deucher <alexander.deucher@amd.com>
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 | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- 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 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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