[PATCH 2/3] drm/dp_mst: Expose build_mst_prop_path()

[<sunpeng.li@amd.com>]

From: Leo Li <sunpeng.li@amd.com>

To give identifiable attributes to MST DP aux devices, we can use the
MST relative address. Expose this function for later use.

Signed-off-by: Leo Li <sunpeng.li@amd.com>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 4 ++--
 include/drm/drm_dp_mst_helper.h       | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 2ab16c9..86ff8e2 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -1120,7 +1120,7 @@ static void drm_dp_check_mstb_guid(struct drm_dp_mst_branch *mstb, u8 *guid)
 	}
 }
 
-static void build_mst_prop_path(const struct drm_dp_mst_branch *mstb,
+void drm_dp_build_mst_prop_path(const struct drm_dp_mst_branch *mstb,
 				int pnum,
 				char *proppath,
 				size_t proppath_size)
@@ -1202,7 +1202,7 @@ static void drm_dp_add_port(struct drm_dp_mst_branch *mstb,
 	if (created && !port->input) {
 		char proppath[255];
 
-		build_mst_prop_path(mstb, port->port_num, proppath, sizeof(proppath));
+		drm_dp_build_mst_prop_path(mstb, port->port_num, proppath, sizeof(proppath));
 		port->connector = (*mstb->mgr->cbs->add_connector)(mstb->mgr, port, proppath);
 		if (!port->connector) {
 			/* remove it from the port list */
diff --git a/include/drm/drm_dp_mst_helper.h b/include/drm/drm_dp_mst_helper.h
index 371cc28..81c8d79 100644
--- a/include/drm/drm_dp_mst_helper.h
+++ b/include/drm/drm_dp_mst_helper.h
@@ -602,6 +602,10 @@ void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,
 int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr,
 			   int pbn);
 
+void drm_dp_build_mst_prop_path(const struct drm_dp_mst_branch *mstb,
+				   int pnum,
+				   char *proppath,
+				   size_t proppath_size);
 
 int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr);
 
-- 
2.7.4

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