drm/amd/display: Add Logging for HDMI color depth information

[Why]
Recent HDMI2.0 HF1-1 V-Swing testing showed that logging deep color
status helps in validation of testcase.

[How]
Add logging based on various color depths and pixel encoding
formats.

Signed-off-by: Praful Swarnakar <[email protected]>
Reviewed-by: Hersen Wu <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: psw2kor

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c

@@ -522,33 +522,44 @@ void enc1_stream_encoder_hdmi_set_stream_attribute(
 	switch (crtc_timing->display_color_depth) {
 	case COLOR_DEPTH_888:
 		REG_UPDATE(HDMI_CONTROL, HDMI_DEEP_COLOR_DEPTH, 0);
+		DC_LOG_DEBUG("HDMI source set to 24BPP deep color depth\n");
 		break;
 	case COLOR_DEPTH_101010:
 		if (crtc_timing->pixel_encoding == PIXEL_ENCODING_YCBCR422) {
 			REG_UPDATE_2(HDMI_CONTROL,
 					HDMI_DEEP_COLOR_DEPTH, 1,
 					HDMI_DEEP_COLOR_ENABLE, 0);
+			DC_LOG_DEBUG("HDMI source 30BPP deep color depth"  \
+				"disabled for YCBCR422 pixel encoding\n");
 		} else {
 			REG_UPDATE_2(HDMI_CONTROL,
 					HDMI_DEEP_COLOR_DEPTH, 1,
 					HDMI_DEEP_COLOR_ENABLE, 1);
+			DC_LOG_DEBUG("HDMI source 30BPP deep color depth"  \
+				"enabled for YCBCR422 non-pixel encoding\n");
 			}
 		break;
 	case COLOR_DEPTH_121212:
 		if (crtc_timing->pixel_encoding == PIXEL_ENCODING_YCBCR422) {
 			REG_UPDATE_2(HDMI_CONTROL,
 					HDMI_DEEP_COLOR_DEPTH, 2,
 					HDMI_DEEP_COLOR_ENABLE, 0);
+			DC_LOG_DEBUG("HDMI source 36BPP deep color depth"  \
+				"disabled for YCBCR422 pixel encoding\n");
 		} else {
 			REG_UPDATE_2(HDMI_CONTROL,
 					HDMI_DEEP_COLOR_DEPTH, 2,
 					HDMI_DEEP_COLOR_ENABLE, 1);
+			DC_LOG_DEBUG("HDMI source 36BPP deep color depth"  \
+				"enabled for non-pixel YCBCR422 encoding\n");
 			}
 		break;
 	case COLOR_DEPTH_161616:
 		REG_UPDATE_2(HDMI_CONTROL,
 				HDMI_DEEP_COLOR_DEPTH, 3,
 				HDMI_DEEP_COLOR_ENABLE, 1);
+		DC_LOG_DEBUG("HDMI source deep color depth enabled in"  \
+				"reserved mode\n");
 		break;
 	default:
 		break;