From 6dc5848899a7ddbf1d02f104a97dde7ba0200693 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Tue, 25 Jun 2013 21:38:10 +0300
Subject: [PATCH] drm/i915: Don't increase the GPU frequency from the delayed
 VLV rps timer
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There's little point in increasing the GPU frequency from the delayed
rps work on VLV. Now when the GPU is idle, the GPU frequency actually
keeps dropping gradually until it hits the minimum, whereas previously
it just ping-ponged constantly between RPe and RPe-1.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 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 ed929667c5ba..ccbdd83f5220 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3461,7 +3461,8 @@ static void vlv_rps_timer_work(struct work_struct *work)
 	 * min freq available.
 	 */
 	mutex_lock(&dev_priv->rps.hw_lock);
-	valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay);
+	if (dev_priv->rps.cur_delay > dev_priv->rps.rpe_delay)
+		valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay);
 	mutex_unlock(&dev_priv->rps.hw_lock);
 }
 
-- 
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