[Intel-gfx] [PATCH v2 20/23] drm/i915/dp: Populate DSC PPS SDP and send PPS infoframes

[Srivatsa, Anusha]

>-----Original Message-----
>From: Navare, Manasi D
>Sent: Tuesday, July 31, 2018 2:07 PM
>To: intel-gfx at lists.freedesktop.org
>Cc: Navare, Manasi D <manasi.d.navare at intel.com>; Jani Nikula
><jani.nikula at linux.intel.com>; Ville Syrjala <ville.syrjala at linux.intel.com>;
>Srivatsa, Anusha <anusha.srivatsa at intel.com>
>Subject: [PATCH v2 20/23] drm/i915/dp: Populate DSC PPS SDP and send PPS
>infoframes
>
>DSC PPS secondary data packet infoframes are filled with DSC picure parameter
>set metadata according to the DSC standard.
>These infoframes are sent to the sink device and used during DSC decoding.
>
>Cc: Jani Nikula <jani.nikula at linux.intel.com>
>Cc: Ville Syrjala <ville.syrjala at linux.intel.com>
>Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
>Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>

Reviewed-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
>---
> drivers/gpu/drm/i915/intel_vdsc.c | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
>diff --git a/drivers/gpu/drm/i915/intel_vdsc.c
>b/drivers/gpu/drm/i915/intel_vdsc.c
>index e3db9dc..bd5dc96 100644
>--- a/drivers/gpu/drm/i915/intel_vdsc.c
>+++ b/drivers/gpu/drm/i915/intel_vdsc.c
>@@ -988,6 +988,25 @@ static void intel_configure_pps_for_dsc_encoder(struct
>intel_encoder *encoder,
> 	}
> }
>
>+static void intel_dp_send_dsc_pps_sdp(struct intel_encoder *encoder,
>+				      struct intel_crtc_state *crtc_state) {
>+	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
>+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
>+	struct drm_dsc_config *vdsc_cfg = &crtc_state->dp_dsc_cfg;
>+	struct drm_dsc_pps_infoframe dp_dsc_pps_sdp;
>+
>+	/* Prepare DP SDP PPS header as per DP 1.4 spec, Table 2-123 */
>+	drm_dsc_dp_pps_header_init(&dp_dsc_pps_sdp);
>+
>+	/* Fill the PPS payload bytes as per DSC spec 1.2 Table 4-1 */
>+	drm_dsc_pps_infoframe_pack(&dp_dsc_pps_sdp, vdsc_cfg);
>+
>+	intel_dig_port->write_infoframe(&encoder->base, crtc_state,
>+					DP_SDP_PPS, &dp_dsc_pps_sdp,
>+					sizeof(dp_dsc_pps_sdp));
>+}
>+
> void intel_dsc_enable(struct intel_encoder *encoder,
> 		      struct intel_crtc_state *crtc_state)  { @@ -1003,5 +1022,7
>@@ void intel_dsc_enable(struct intel_encoder *encoder,
>
> 	intel_configure_pps_for_dsc_encoder(encoder, crtc_state);
>
>+	intel_dp_send_dsc_pps_sdp(encoder, crtc_state);
>+
> 	return;
> }
>--
>2.7.4