drm/i915/dp: Add wrapper function to check AS SDP

Add a wrapper function to check if both the source and
sink support Adaptive Sync SDP.

--v1:
Just use drm/i915/dp in subject line.
Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240322031157.3823909-6-mitulkumar.ajitkumar.golani@intel.com

drivers/gpu/drm/i915/display/intel_dp.c

@@ -123,6 +123,14 @@ bool intel_dp_is_edp(struct intel_dp *intel_dp)
 	return dig_port->base.type == INTEL_OUTPUT_EDP;
 }
 
+bool intel_dp_as_sdp_supported(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+
+	return HAS_AS_SDP(i915) &&
+		drm_dp_as_sdp_supported(&intel_dp->aux, intel_dp->dpcd);
+}
+
 static void intel_dp_unset_edid(struct intel_dp *intel_dp);
 
 /* Is link rate UHBR and thus 128b/132b? */

drivers/gpu/drm/i915/display/intel_dp.h

@@ -88,6 +88,7 @@ void intel_dp_audio_compute_config(struct intel_encoder *encoder,
 				   struct drm_connector_state *conn_state);
 bool intel_dp_has_hdmi_sink(struct intel_dp *intel_dp);
 bool intel_dp_is_edp(struct intel_dp *intel_dp);
+bool intel_dp_as_sdp_supported(struct intel_dp *intel_dp);
 bool intel_dp_is_uhbr(const struct intel_crtc_state *crtc_state);
 int intel_dp_link_symbol_size(int rate);
 int intel_dp_link_symbol_clock(int rate);