[Intel-gfx] [PATCH v3 2/5] drm/i915: Re-adjusting rc6 promotional timer for chv

[Daniel Vetter]

On Sat, Mar 28, 2015 at 03:23:35PM +0530, deepak.s at linux.intel.com wrote:
> From: Deepak S <deepak.s at 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 at linux.intel.com>
> Reviewed-by: Paulo Zanoni <paulo.r.zanoni at intel.com>

Queued for -next, thanks for the patch.
-Daniel

> ---
>  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 fa4ccb3..44428e4 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -4996,8 +4996,8 @@ 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
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch