[PATCH 3/7] drm/dp-mst: Use connector kdev as aux device parent

sunpeng.li at amd.com sunpeng.li at amd.com
Thu May 16 15:17:59 UTC 2019

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

Placing the MST aux device as a child of the connector gives udev the
ability to access the connector device's attributes. This will come in
handy when writing udev rules to create more descriptive symlinks to the
MST aux devices.

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Lyude Paul <lyude at redhat.com>
Signed-off-by: Leo Li <sunpeng.li at amd.com>
 drivers/gpu/drm/drm_dp_mst_topology.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 54da68e..cd2f3c4 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -1269,6 +1269,9 @@ static void drm_dp_add_port(struct drm_dp_mst_branch *mstb,
+		if (port->connector->registration_state == DRM_CONNECTOR_REGISTERED)
+			port->aux.dev = port->connector->kdev;

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