drm/amd/display: handle active dongle port type is DP++ or DP case

[Why]:
Some active dongles have DP++ port and DP port at the same time. Current
code doesn't cover DP++ case and processes as default DVI case, in which
audio is disabled. Because of dual mode, DP case is also treat as DVI case
for the other port.

[How]:
According DP 1.4 spec, add DP++ procedure similar with HDMI case. Also
add None dongle type for DP case.

Signed-off-by: Dale Zhao <dale.zhao@amd.com>
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

@@ -2247,8 +2247,8 @@ static void get_active_converter_info(
 	case DOWNSTREAM_VGA:
 		link->dpcd_caps.dongle_type = DISPLAY_DONGLE_DP_VGA_CONVERTER;
 		break;
-	case DOWNSTREAM_DVI_HDMI:
+	case DOWNSTREAM_DVI_HDMI_DP_PLUS_PLUS:
-		/* At this point we don't know is it DVI or HDMI,
+		/* At this point we don't know is it DVI or HDMI or DP++,
 		 * assume DVI.*/
 		link->dpcd_caps.dongle_type = DISPLAY_DONGLE_DP_DVI_CONVERTER;
 		break;
@@ -2265,6 +2265,10 @@ static void get_active_converter_info(
 				det_caps, sizeof(det_caps));
 
 		switch (port_caps->bits.DWN_STRM_PORTX_TYPE) {
+		/*Handle DP case as DONGLE_NONE*/
+		case DOWN_STREAM_DETAILED_DP:
+			link->dpcd_caps.dongle_type = DISPLAY_DONGLE_NONE;
+			break;
 		case DOWN_STREAM_DETAILED_VGA:
 			link->dpcd_caps.dongle_type =
 				DISPLAY_DONGLE_DP_VGA_CONVERTER;
@@ -2274,6 +2278,8 @@ static void get_active_converter_info(
 				DISPLAY_DONGLE_DP_DVI_CONVERTER;
 			break;
 		case DOWN_STREAM_DETAILED_HDMI:
+		case DOWN_STREAM_DETAILED_DP_PLUS_PLUS:
+			/*Handle DP++ active converter case, process DP++ case as HDMI case according DP1.4 spec*/
 			link->dpcd_caps.dongle_type =
 				DISPLAY_DONGLE_DP_HDMI_CONVERTER;
 
@@ -2289,6 +2295,9 @@ static void get_active_converter_info(
 
 				link->dpcd_caps.dongle_caps.is_dp_hdmi_s3d_converter =
 					hdmi_caps.bits.FRAME_SEQ_TO_FRAME_PACK;
+				/*YCBCR capability only for HDMI case*/
+				if (port_caps->bits.DWN_STRM_PORTX_TYPE
+						== DOWN_STREAM_DETAILED_HDMI) {
 					link->dpcd_caps.dongle_caps.is_dp_hdmi_ycbcr422_pass_through =
 							hdmi_caps.bits.YCrCr422_PASS_THROUGH;
 					link->dpcd_caps.dongle_caps.is_dp_hdmi_ycbcr420_pass_through =
@@ -2297,6 +2306,7 @@ static void get_active_converter_info(
 							hdmi_caps.bits.YCrCr422_CONVERSION;
 					link->dpcd_caps.dongle_caps.is_dp_hdmi_ycbcr420_converter =
 							hdmi_caps.bits.YCrCr420_CONVERSION;
+				}
 
 				link->dpcd_caps.dongle_caps.dp_hdmi_max_bpc =
 					translate_dpcd_max_bpc(

drivers/gpu/drm/amd/display/include/dpcd_defs.h

@@ -43,7 +43,7 @@ enum dpcd_revision {
 enum dpcd_downstream_port_type {
 	DOWNSTREAM_DP = 0,
 	DOWNSTREAM_VGA,
-	DOWNSTREAM_DVI_HDMI,
+	DOWNSTREAM_DVI_HDMI_DP_PLUS_PLUS,/* DVI, HDMI, DP++ */
 	DOWNSTREAM_NONDDC /* has no EDID (TV,CV) */
 };