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Koen Kooi
189ce92b4c
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
41 lines
1.4 KiB
Diff
41 lines
1.4 KiB
Diff
From 4080c93fb98e70e64d31c2ab2bd036a940c0807b Mon Sep 17 00:00:00 2001
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From: Alex Deucher <alexander.deucher@amd.com>
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Date: Tue, 3 Jan 2012 09:48:38 -0500
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Subject: [PATCH 018/129] drm/radeon/kms: disable writeback on pre-R300 asics
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commit 28eebb703e28bc455ba704adb1026f76649b768c upstream.
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We often end up missing fences on older asics with
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writeback enabled which leads to delays in the userspace
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accel code, so just disable it by default on those asics.
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Reported-by: Helge Deller <deller@gmx.de>
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Reported-by: Dave Airlie <airlied@redhat.com>
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Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Signed-off-by: Dave Airlie <airlied@redhat.com>
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Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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---
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drivers/gpu/drm/radeon/radeon_device.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
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index c4d00a1..9b39145 100644
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--- a/drivers/gpu/drm/radeon/radeon_device.c
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+++ b/drivers/gpu/drm/radeon/radeon_device.c
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@@ -224,8 +224,11 @@ int radeon_wb_init(struct radeon_device *rdev)
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if (radeon_no_wb == 1)
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rdev->wb.enabled = false;
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else {
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- /* often unreliable on AGP */
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if (rdev->flags & RADEON_IS_AGP) {
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+ /* often unreliable on AGP */
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+ rdev->wb.enabled = false;
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+ } else if (rdev->family < CHIP_R300) {
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+ /* often unreliable on pre-r300 */
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rdev->wb.enabled = false;
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} else {
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rdev->wb.enabled = true;
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--
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1.7.9.5
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