3 files changed, 25 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 997567f6f0ba..ef8d53e24c47 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -429,6 +429,8 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
 				       struct amdgpu_dm_connector *aconnector,
 				       int link_index)
 {
+	struct dc_link_settings max_link_enc_cap = {0};
+
 	aconnector->dm_dp_aux.aux.name =
 		kasprintf(GFP_KERNEL, "AMDGPU DM aux hw bus %d",
 			  link_index);
@@ -443,6 +445,7 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
 	if (aconnector->base.connector_type == DRM_MODE_CONNECTOR_eDP)
 		return;
 
+	dc_link_dp_get_max_link_enc_cap(aconnector->dc_link, &max_link_enc_cap);
 	aconnector->mst_mgr.cbs = &dm_mst_cbs;
 	drm_dp_mst_topology_mgr_init(
 		&aconnector->mst_mgr,
@@ -450,6 +453,8 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
 		&aconnector->dm_dp_aux.aux,
 		16,
 		4,
+		(u8)max_link_enc_cap.lane_count,
+		(u8)max_link_enc_cap.link_rate,
 		aconnector->connector_id);
 
 	drm_connector_attach_dp_subconnector_property(&aconnector->base);
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 7d2e433c2275..6fe66b7ee53e 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -1894,6 +1894,24 @@ bool dc_link_dp_sync_lt_end(struct dc_link *link, bool link_down)
 	return true;
 }
 
+bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap)
+{
+	if (!max_link_enc_cap) {
+		DC_LOG_ERROR("%s: Could not return max link encoder caps", __func__);
+		return false;
+	}
+
+	if (link->link_enc->funcs->get_max_link_cap) {
+		link->link_enc->funcs->get_max_link_cap(link->link_enc, max_link_enc_cap);
+		return true;
+	}
+
+	DC_LOG_ERROR("%s: Max link encoder caps unknown", __func__);
+	max_link_enc_cap->lane_count = 1;
+	max_link_enc_cap->link_rate = 6;
+	return false;
+}
+
 static struct dc_link_settings get_max_link_cap(struct dc_link *link)
 {
 	struct dc_link_settings max_link_cap = {0};
diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h
index b0013e674864..cb6d0543d839 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
@@ -346,6 +346,8 @@ bool dc_link_dp_set_test_pattern(
 	const unsigned char *p_custom_pattern,
 	unsigned int cust_pattern_size);
 
+bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap);
+
 void dc_link_enable_hpd_filter(struct dc_link *link, bool enable);
 
 bool dc_link_is_dp_sink_present(struct dc_link *link);