drm/i915: Re-adjusting rc6 promotional timer for chv

After feedback from the hardware team we are changing the RC6
promotional timer to increase the power saving without
changing performance.

Signed-off-by: Deepak S <deepak.s@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a80bfd5..a7516ed 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5046,8 +5046,8 @@ static void cherryview_enable_rps(struct drm_device *dev)
                I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
        I915_WRITE(GEN6_RC_SLEEP, 0);
 
-       /* TO threshold set to 1750 us ( 0x557 * 1.28 us) */
-       I915_WRITE(GEN6_RC6_THRESHOLD, 0x557);
+       /* TO threshold set to 500 us ( 0x186 * 1.28 us) */
+       I915_WRITE(GEN6_RC6_THRESHOLD, 0x186);
 
        /* allows RC6 residency counter to work */
        I915_WRITE(VLV_COUNTER_CONTROL,