[PATCH 3/7] drm/dp-mst: Use connector kdev as aux device parent - sunpeng.li-5C7GfCeVMHo

From: <sunpeng.li-5C7GfCeVMHo@public.gmane.org>
To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Cc: "Leo Li" <sunpeng.li-5C7GfCeVMHo@public.gmane.org>,
	"Ville Syrjälä"
	<ville.syrjala-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Subject: [PATCH 3/7] drm/dp-mst: Use connector kdev as aux device parent
Date: Thu, 16 May 2019 11:17:59 -0400	[thread overview]
Message-ID: <1558019883-12397-4-git-send-email-sunpeng.li@amd.com> (raw)
In-Reply-To: <1558019883-12397-1-git-send-email-sunpeng.li-5C7GfCeVMHo@public.gmane.org>

From: Leo Li <sunpeng.li@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@linux.intel.com>
Cc: Lyude Paul <lyude@redhat.com>
Signed-off-by: Leo Li <sunpeng.li@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,
 		}
 		(*mstb->mgr->cbs->register_connector)(port->connector);
 
+		if (port->connector->registration_state == DRM_CONNECTOR_REGISTERED)
+			port->aux.dev = port->connector->kdev;
+
 		drm_dp_aux_register_devnode(&port->aux);
 	}
 
-- 
2.7.4

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