[Intel-gfx] [PATCH 2/7] drm/i915/icl: Apply a recommended rc6 threshold

[Michal Wajdeczko]

On Tue, 09 Apr 2019 18:13:05 +0200, Mika Kuoppala  
<mika.kuoppala at linux.intel.com> wrote:

> On gen11 the recommended rc6 threshold differs from previous
> gens, apply it.
>
> References: bspec#52070

Is this correct number? I found it at 33149
And note that we are using different tag:

Bspec: 33149

> Signed-off-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_pm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c  
> b/drivers/gpu/drm/i915/intel_pm.c
> index 43ec0fb4c197..30ef507b88a4 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -7174,7 +7174,7 @@ static void gen11_enable_rc6(struct  
> drm_i915_private *dev_priv)
>  	I915_WRITE(GEN9_RENDER_PG_IDLE_HYSTERESIS, 250);
> 	/* 3a: Enable RC6 */
> -	I915_WRITE(GEN6_RC6_THRESHOLD, 37500); /* 37.5/125ms per EI */
> +	I915_WRITE(GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */

Btw, in bspec this is done at the end of step 2b.
Shall we reorder whole function to match the spec?

~Michal