[PATCH v14 6/9] drm/i915/display: Compute AS SDP parameters

[Nautiyal, Ankit K]

On 2/29/2024 10:09 PM, Mitul Golani wrote:
> Add necessary function definitions to compute AS SDP data.
> The new intel_dp_compute_as_sdp function computes AS SDP
> values based on the display configuration, ensuring proper
> handling of Variable Refresh Rate (VRR).
>
> --v2:
> - Added DP_SDP_ADAPTIVE_SYNC to infoframe_type_to_idx(). [Ankit]
> - Separated patch for intel_read/write_dp_sdp. [Ankit]
> - _HSW_VIDEO_DIP_ASYNC_DATA_A should be from ADL onward. [Ankit]
> - Fixed indentation issues. [Ankit]
>
> --v3:
> - Added VIDEO_DIP_ENABLE_AS_HSW flag to intel_dp_set_infoframes.
>
> --v4:
> - Added HAS_VRR check before writing AS SDP.
>
> --v5:
> Added missed HAS_VRR check before reading AS SDP.
>
> --v6:
> - Used Adaptive Sync sink status as a check for read/write SDP. (Ankit)
>
> --v7:
> - Remove as_sdp_enable from crtc_state.
> - Add a comment mentioning current support of
>    DP_AS_SDP_AVT_FIXED_VTOTAL.
> - Add state checker for AS_SDP infoframe enable.
>
> --v8:
> - Drop conn_state from intel_dp_compute_as_sdp, as not used.
> - Remove fullstop in subject line.
> Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani at intel.com>
> ---
>   drivers/gpu/drm/i915/display/intel_dp.c | 26 +++++++++++++++++++++++++
>   1 file changed, 26 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index b26efce4a041..86de854516ef 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -2626,6 +2626,31 @@ static void intel_dp_compute_vsc_colorimetry(const struct intel_crtc_state *crtc
>   	vsc->content_type = DP_CONTENT_TYPE_NOT_DEFINED;
>   }
>   
> +static void intel_dp_compute_as_sdp(struct intel_dp *intel_dp,
> +				    struct intel_crtc_state *crtc_state)
> +{
> +	struct drm_dp_as_sdp *as_sdp = &crtc_state->infoframes.as_sdp;
> +	struct intel_connector *connector = intel_dp->attached_connector;
> +	const struct drm_display_mode *adjusted_mode =
> +		&crtc_state->hw.adjusted_mode;
> +	int vrefresh = drm_mode_vrefresh(adjusted_mode);
> +
> +	if (!intel_vrr_is_in_range(connector, vrefresh) ||


Instead of this we should check for crtc_state->vrr.enable as we intend 
to send the AS SDP when VRR is to be enabled. Sorry for missing this 
earlier.

Otherwise LGTM.

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>



> +	    !intel_dp_as_sdp_supported(intel_dp))
> +		return;
> +
> +	crtc_state->infoframes.enable |= intel_hdmi_infoframe_enable(DP_SDP_ADAPTIVE_SYNC);
> +
> +	/* Currently only DP_AS_SDP_AVT_FIXED_VTOTAL mode supported */
> +	as_sdp->sdp_type = DP_SDP_ADAPTIVE_SYNC;
> +	as_sdp->length = 0x9;
> +	as_sdp->mode = DP_AS_SDP_AVT_FIXED_VTOTAL;
> +	as_sdp->vtotal = adjusted_mode->vtotal;
> +	as_sdp->target_rr = 0;
> +	as_sdp->duration_incr_ms = 0;
> +	as_sdp->duration_incr_ms = 0;
> +}
> +
>   static void intel_dp_compute_vsc_sdp(struct intel_dp *intel_dp,
>   				     struct intel_crtc_state *crtc_state,
>   				     const struct drm_connector_state *conn_state)
> @@ -2951,6 +2976,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
>   		g4x_dp_set_clock(encoder, pipe_config);
>   
>   	intel_vrr_compute_config(pipe_config, conn_state);
> +	intel_dp_compute_as_sdp(intel_dp, pipe_config);
>   	intel_psr_compute_config(intel_dp, pipe_config, conn_state);
>   	intel_dp_drrs_compute_config(connector, pipe_config, link_bpp_x16);
>   	intel_dp_compute_vsc_sdp(intel_dp, pipe_config, conn_state);