From: Hersen Wu <hersenxs.wu@amd.com>
Date: Mon, 23 Oct 2017 09:11:46 -0400
Subject: drm/amd/display: Handle as MST first and then DP dongle if sink
support both
Git-commit: 58fe8990fc29336c9ea6531d9ecc44466d3b9221
Patch-mainline: v4.15-rc2
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 32 +++++++++++++-------------
1 file changed, 16 insertions(+), 16 deletions(-)
--- 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,