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authorAlex Deucher <alexander.deucher@amd.com>2013-01-31 09:01:59 -0500
committerAlex Deucher <alexander.deucher@amd.com>2013-01-31 16:13:42 -0500
commit39dc9aabd8708944031e6307819b2a794b841f83 (patch)
tree2d42e5ce39688d8035ee4c25a2bb1ff3fea01ce5 /drivers/gpu/drm
parented39fadd6df01095378e499fac3674883f16b853 (diff)
drm/radeon/r5xx-r7xx: wait for the MC to settle after MC blackout
Some chips seem to need a little delay after blacking out the MC before the requests actually stop. Stop DMAR errors reported by Shuah Khan. Reported-by: Shuah Khan <shuahkhan@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/radeon/rv515.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rv515.c b/drivers/gpu/drm/radeon/rv515.c
index 2bb6d0e84b3d..435ed3551364 100644
--- a/drivers/gpu/drm/radeon/rv515.c
+++ b/drivers/gpu/drm/radeon/rv515.c
@@ -336,6 +336,8 @@ void rv515_mc_stop(struct radeon_device *rdev, struct rv515_mc_save *save)
WREG32(R600_CITF_CNTL, blackout);
}
}
+ /* wait for the MC to settle */
+ udelay(100);
}
void rv515_mc_resume(struct radeon_device *rdev, struct rv515_mc_save *save)