[PATCH] drm/i915/vlv: reduce GT FIFO error info to a debug message

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It indicates a probable BIOS bug, but it appears to be harmless, and
there's nothing the user can do about it anyway, so reduce to a debug
msg.  I've filed a bug with the BIOS folks about it anyway, so hopefully
they'll fix whatever GT SB read they were doing when the GT was off.

References: https://bugs.freedesktop.org/show_bug.cgi?id=69396
Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_pm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 102fc49..10054b5 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3804,7 +3804,8 @@ static void valleyview_enable_rps(struct drm_device *dev)
 	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
 
 	if ((gtfifodbg = I915_READ(GTFIFODBG))) {
-		DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
+		DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
+				 gtfifodbg);
 		I915_WRITE(GTFIFODBG, gtfifodbg);
 	}
 
-- 
1.8.3.1

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