drm/amd/display: Remove get_connector_for_sink.

Keep 1:1 relation between MST sink and it's MST connector.
Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

@@ -133,21 +133,6 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
 	return result;
 }
 
-static struct amdgpu_connector *get_connector_for_sink(
-	struct drm_device *dev,
-	const struct dc_sink *sink)
-{
-	struct drm_connector *connector;
-
-	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-		struct amdgpu_connector *aconnector = to_amdgpu_connector(connector);
-		if (aconnector->dc_sink == sink)
-			return aconnector;
-	}
-
-	return NULL;
-}
-
 static void get_payload_table(
 		struct amdgpu_connector *aconnector,
 		struct dp_mst_stream_allocation_table *proposed_table)
@@ -194,8 +179,6 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
 		struct dp_mst_stream_allocation_table *proposed_table,
 		bool enable)
 {
-	struct amdgpu_device *adev = ctx->driver_context;
-	struct drm_device *dev = adev->ddev;
 	struct amdgpu_connector *aconnector;
 	struct drm_dp_mst_topology_mgr *mst_mgr;
 	struct drm_dp_mst_port *mst_port;
@@ -205,7 +188,7 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
 	int bpp = 0;
 	int pbn = 0;
 
-	aconnector = get_connector_for_sink(dev, stream->sink);
+	aconnector = stream->sink->priv;
 
 	if (!aconnector || !aconnector->mst_port)
 		return false;
@@ -284,13 +267,11 @@ bool dm_helpers_dp_mst_poll_for_allocation_change_trigger(
 		struct dc_context *ctx,
 		const struct dc_stream *stream)
 {
-	struct amdgpu_device *adev = ctx->driver_context;
-	struct drm_device *dev = adev->ddev;
 	struct amdgpu_connector *aconnector;
 	struct drm_dp_mst_topology_mgr *mst_mgr;
 	int ret;
 
-	aconnector = get_connector_for_sink(dev, stream->sink);
+	aconnector = stream->sink->priv;
 
 	if (!aconnector || !aconnector->mst_port)
 		return false;
@@ -313,14 +294,12 @@ bool dm_helpers_dp_mst_send_payload_allocation(
 		const struct dc_stream *stream,
 		bool enable)
 {
-	struct amdgpu_device *adev = ctx->driver_context;
-	struct drm_device *dev = adev->ddev;
 	struct amdgpu_connector *aconnector;
 	struct drm_dp_mst_topology_mgr *mst_mgr;
 	struct drm_dp_mst_port *mst_port;
 	int ret;
 
-	aconnector = get_connector_for_sink(dev, stream->sink);
+	aconnector = stream->sink->priv;
 
 	if (!aconnector || !aconnector->mst_port)
 		return false;

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c

@@ -325,6 +325,7 @@ static void dm_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 	struct drm_connector *connector;
 	struct amdgpu_connector *aconnector;
 	struct edid *edid;
+	struct dc_sink *dc_sink;
 
 	drm_modeset_lock_all(dev);
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
@@ -352,11 +353,15 @@ static void dm_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 
 				aconnector->edid = edid;
 
-				aconnector->dc_sink = dc_link_add_remote_sink(
+				dc_sink = dc_link_add_remote_sink(
 					aconnector->dc_link,
 					(uint8_t *)edid,
 					(edid->extensions + 1) * EDID_LENGTH,
 					&init_params);
+
+				dc_sink->priv = aconnector;
+				aconnector->dc_sink = dc_sink;
+
 				if (aconnector->dc_sink)
 					amdgpu_dm_add_sink_to_freesync_module(
 							connector,

drivers/gpu/drm/amd/display/dc/dc.h

@@ -719,6 +719,7 @@ struct dc_sink {
 	struct dc_container_id *dc_container_id;
 	uint32_t dongle_max_pix_clk;
 	bool converter_disable_audio;
+	void *priv;
 };
 
 void dc_sink_retain(const struct dc_sink *sink);