[PATCH v2 2/4] drm/i915: Re-adjusting rc6 promotional timer for chv

deepak.s
2015-03-19T14:17:45Z

From: Deepak S <deepak.s@linux.intel.com>

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>
---
drivers/gpu/drm/i915/intel_pm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index e18f0fd..6d04147 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4980,8 +4980,8 @@ 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,
--
1.9.1