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Subject[ 01/16] drm/radeon/evergreen+: wait for the MC to settle after MC blackout
Date
3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@amd.com>

commit ed39fadd6df01095378e499fac3674883f16b853 upstream.

Some chips seem to need a little delay after blacking out
the MC before the requests actually stop.

May fix:
https://bugs.freedesktop.org/show_bug.cgi?id=56139
https://bugs.freedesktop.org/show_bug.cgi?id=57567

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/radeon/evergreen.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -1065,6 +1065,8 @@ void evergreen_mc_stop(struct radeon_dev
WREG32(EVERGREEN_D5VGA_CONTROL, 0);
WREG32(EVERGREEN_D6VGA_CONTROL, 0);
}
+ /* wait for the MC to settle */
+ udelay(100);
}

void evergreen_mc_resume(struct radeon_device *rdev, struct evergreen_mc_save *save)



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