[PATCH v2] drm/amd/display: Check & log if receiver supports MST, DSC & FEC.

[Srinivasan Shanmugam]

After reading from receiver via DPCD, check & log if it supports MST,
DSC & FEC

Cc: Aurabindo Pillai <aurabindo.pillai at amd.com>
Cc: Fangzhi Zuo <Jerry.Zuo at amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
---

v2:

 - Added %s: to print the function name.

 .../amd/display/dc/link/protocols/link_dp_capability.c   | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
index ba98013fecd0..f93fc35a1a50 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
@@ -1554,6 +1554,8 @@ static bool retrieve_link_cap(struct dc_link *link)
 	int i;
 	struct dp_sink_hw_fw_revision dp_hw_fw_revision;
 	const uint32_t post_oui_delay = 30; // 30ms
+	bool is_fec_supported = false;
+	bool is_dsc_supported = false;
 
 	memset(dpcd_data, '\0', sizeof(dpcd_data));
 	memset(&down_strm_port_count,
@@ -1696,6 +1698,7 @@ static bool retrieve_link_cap(struct dc_link *link)
 
 	/* TODO - decouple raw mst capability from policy decision */
 	link->dpcd_caps.is_mst_capable = read_is_mst_supported(link);
+	DC_LOG_DC("%s: MST_Support: %s\n", __func__, str_yes_no(link->dpcd_caps.is_mst_capable));
 
 	get_active_converter_info(ds_port.byte, link);
 
@@ -1803,6 +1806,12 @@ static bool retrieve_link_cap(struct dc_link *link)
 				DP_DSC_SUPPORT,
 				link->dpcd_caps.dsc_caps.dsc_basic_caps.raw,
 				sizeof(link->dpcd_caps.dsc_caps.dsc_basic_caps.raw));
+		if (status == DC_OK) {
+			is_fec_supported = link->dpcd_caps.fec_cap.raw & 0x1;
+			is_dsc_supported = link->dpcd_caps.dsc_caps.dsc_basic_caps.raw[0] & 0x1;
+			DC_LOG_DC("%s: FEC_Sink_Support: %s\n", __func__, str_yes_no(is_fec_supported));
+			DC_LOG_DC("%s: DSC_Sink_Support: %s\n", __func__, str_yes_no(is_dsc_supported));
+		}
 		if (link->dpcd_caps.dongle_type != DISPLAY_DONGLE_NONE) {
 			status = core_link_read_dpcd(
 					link,
-- 
2.25.1