[Intel-gfx] [PATCH 1/2] drm/i915/vlv: correct promotion timer value for RC6 Timeout method.

[deepak.s at intel.com]

From: Deepak S <deepak.s at intel.com>

For RC6 Timeout method, we need to set promotion timer to 1750 us ( 1367
* 1.28 us)

Signed-off-by: Deepak S <deepak.s at intel.com>
---
 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 04e9863..cf3d54d 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4102,7 +4102,8 @@ static void valleyview_enable_rps(struct drm_device *dev)
 	for_each_ring(ring, dev_priv, i)
 		I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
 
-	I915_WRITE(GEN6_RC6_THRESHOLD, 0xc350);
+	/* Timer for RC6 Timeout Mode set to 1750 us ( 1367 * 1.28 us) */
+	I915_WRITE(GEN6_RC6_THRESHOLD, 0x557);
 
 	/* allows RC6 residency counter to work */
 	I915_WRITE(VLV_COUNTER_CONTROL,
-- 
1.8.4.2