From: Jesse Barnes Date: Fri, 15 Nov 2013 17:32:11 +0000 (-0800) Subject: drm/i915/vlv: use a lower RC6 timeout on VLV X-Git-Tag: upstream/snapshot3+hdmi~3525^2~90^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2f0aa30425414f3105bc29dd39bfdb40cb684393;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git drm/i915/vlv: use a lower RC6 timeout on VLV We use timeout mode, and we need to lower the timeout to get good RC6 residency when loads are running. This gets me from 0% residency during glxgears to 77%, which is a pretty good improvement. This value also matches the current BWG recommentations. Tested-by: "Meng, Mengmeng" Signed-off-by: Jesse Barnes Reviewed-by: Deepak S Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 1659265..2d74ae8 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4110,7 +4110,7 @@ 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); + I915_WRITE(GEN6_RC6_THRESHOLD, 0x557); /* allows RC6 residency counter to work */ I915_WRITE(VLV_COUNTER_CONTROL,