[Intel-gfx] [PATCH 2/2] drm/i915/psr: Disable PSR2 when SDP is sent on prior line

[Kahola, Mika]

> -----Original Message-----
> From: Hogander, Jouni <jouni.hogander at intel.com>
> Sent: Monday, September 5, 2022 1:24 PM
> To: intel-gfx at lists.freedesktop.org
> Cc: Hogander, Jouni <jouni.hogander at intel.com>; Kahola, Mika
> <mika.kahola at intel.com>; Souza, Jose <jose.souza at intel.com>
> Subject: [PATCH 2/2] drm/i915/psr: Disable PSR2 when SDP is sent on prior line
> 
> Selective update doesn't work if SU start address is 0 and start/end SDP is
> configured to be sent prior to SU start/end lines. PSR2 has to be disabled in this
> case for Alder Lake.
> 
> HSDES: 22012279113
> 
> Cc: Mika Kahola <mika.kahola at intel.com>
> Cc: José Roberto de Souza <jose.souza at intel.com>

Reviewed-by: Mika Kahola <mika.kahola at intel.com>

> Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_psr.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> b/drivers/gpu/drm/i915/display/intel_psr.c
> index 6f03bf16d6f4..90d7cdd743be 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -811,7 +811,8 @@ static bool
> _compute_psr2_sdp_prior_scanline_indication(struct intel_dp *intel_d
>  	if ((hblank_ns - req_ns) > 100)
>  		return true;
> 
> -	if (DISPLAY_VER(dev_priv) < 13 || intel_dp->edp_dpcd[0] <
> DP_EDP_14b)
> +	/* Not supported <13 / Wa_22012279113:adl-p */
> +	if (DISPLAY_VER(dev_priv) <= 13 || intel_dp->edp_dpcd[0] <
> DP_EDP_14b)
>  		return false;
> 
>  	crtc_state->req_psr2_sdp_prior_scanline = true;
> --
> 2.34.1