[Intel-gfx] [PATCH v3 1/8] drm/i915: fix the derating percentage for MTL

[Matt Roper]

On Thu, Apr 27, 2023 at 06:00:09PM +0300, Vinod Govindapillai wrote:
> Follow the values from bspec for the percentage overhead for
> efficiency in MTL BW calculations.
> 
> Bspec: 64631
> 
> Signed-off-by: Vinod Govindapillai <vinod.govindapillai at intel.com>

Looks like the bspec was updated with this new value on March 30th.

Reviewed-by: Matt Roper <matthew.d.roper at intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_bw.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
> index 597d5816ad1b..ab405c48ca3a 100644
> --- a/drivers/gpu/drm/i915/display/intel_bw.c
> +++ b/drivers/gpu/drm/i915/display/intel_bw.c
> @@ -379,7 +379,7 @@ static const struct intel_sa_info mtl_sa_info = {
>  	.deburst = 32,
>  	.deprogbwlimit = 38, /* GB/s */
>  	.displayrtids = 256,
> -	.derating = 20,
> +	.derating = 10,
>  };
>  
>  static int icl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel_sa_info *sa)
> -- 
> 2.34.1
> 

-- 
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation