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drm/i915: Don't increase the GPU frequency from the delayed VLV rps timer 

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>
hifive-unleashed-5.1
Ville Syrjälä 2013-06-25 21:38:10 +03:00 committed by Daniel Vetter
parent 7a67092a25
commit 6dc5848899
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/intel_pm.c
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@ -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);
}