[Intel-gfx] [PATCH 5/6] drm/i915/display/adl_p: Implement Wa_16011303918

[Gwan-gyeong Mun]

looks good to me

Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>

On 6/16/21 11:31 PM, José Roberto de Souza wrote:
> PSR2 is not compatible with DC3CO or VRR in this stepping, so not
> enabling PSR2 if VRR will be enabled or not enabling DC3CO if PSR2 is
> possible.
> 
> BSpec: 54369
> Cc: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
> Cc: Matt Atwood <matthew.s.atwood at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> ---
>   drivers/gpu/drm/i915/display/intel_psr.c | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> index 3cb8758be4042..9643624fe160d 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -733,6 +733,10 @@ tgl_dc3co_exitline_compute_config(struct intel_dp *intel_dp,
>   	if (!dc3co_is_pipe_port_compatible(intel_dp, crtc_state))
>   		return;
>   
> +	/* Wa_16011303918:adlp */
> +	if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_A0))
> +		return;
> +
>   	/*
>   	 * DC3CO Exit time 200us B.Spec 49196
>   	 * PSR2 transcoder Early Exit scanlines = ROUNDUP(200 / line time) + 1
> @@ -961,6 +965,14 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
>   		return false;
>   	}
>   
> +	/* Wa_16011303918:adlp */
> +	if (crtc_state->vrr.enable &&
> +	    IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_A0)) {
> +		drm_dbg_kms(&dev_priv->drm,
> +			    "PSR2 not enabled, not compatible with HW stepping + VRR\n");
> +		return false;
> +	}
> +
>   	tgl_dc3co_exitline_compute_config(intel_dp, crtc_state);
>   	return true;
>   }
>