drm/amd/display: Save hpd_src for dc_link

Signed-off-by: Zeyu Fan <Zeyu.Fan@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index a78af1e..6d91839 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -658,6 +658,9 @@ struct dc_link {
 	struct dc_lane_settings cur_lane_setting;
 
 	uint8_t ddc_hw_inst;
+
+	uint8_t hpd_src;
+
 	uint8_t link_enc_hw_inst;
 
 	bool test_pattern_enabled;