[PATCH 15/29] drm/amd/display: Handle as MST first and then DP dongle if sink support both

[Harry Wentland]

From: Hersen Wu <hersenxs...@amd.com>

Signed-off-by: Hersen Wu <hersenxs...@amd.com>
Reviewed-by: Tony Cheng <tony.ch...@amd.com>
Reviewed-by: Wenjing Liu <wenjing....@amd.com>
Acked-by: Harry Wentland <harry.wentl...@amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 32 +++++++++++++--------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c 
b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 18294df189b3..be9a182d6fb3 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -480,22 +480,6 @@ static void detect_dp(
                sink_caps->signal = SIGNAL_TYPE_DISPLAY_PORT;
                detect_dp_sink_caps(link);
 
-               /* DP active dongles */
-               if (is_dp_active_dongle(link)) {
-                       link->type = dc_connection_active_dongle;
-                       if (!link->dpcd_caps.sink_count.bits.SINK_COUNT) {
-                               /*
-                                * active dongle unplug processing for short irq
-                                */
-                               link_disconnect_sink(link);
-                               return;
-                       }
-
-                       if (link->dpcd_caps.dongle_type !=
-                       DISPLAY_DONGLE_DP_HDMI_CONVERTER) {
-                               *converter_disable_audio = true;
-                       }
-               }
                if (is_mst_supported(link)) {
                        sink_caps->signal = SIGNAL_TYPE_DISPLAY_PORT_MST;
                        link->type = dc_connection_mst_branch;
@@ -535,6 +519,22 @@ static void detect_dp(
                                sink_caps->signal = SIGNAL_TYPE_DISPLAY_PORT;
                        }
                }
+
+               if (link->type != dc_connection_mst_branch &&
+                       is_dp_active_dongle(link)) {
+                       /* DP active dongles */
+                       link->type = dc_connection_active_dongle;
+                       if (!link->dpcd_caps.sink_count.bits.SINK_COUNT) {
+                               /*
+                                * active dongle unplug processing for short irq
+                                */
+                               link_disconnect_sink(link);
+                               return;
+                       }
+
+                       if (link->dpcd_caps.dongle_type != 
DISPLAY_DONGLE_DP_HDMI_CONVERTER)
+                               *converter_disable_audio = true;
+               }
        } else {
                /* DP passive dongles */
                sink_caps->signal = dp_passive_dongle_detection(link->ddc,
-- 
2.14.1

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