[PATCH 1/2] drm/amdgpu/display: fix aux registration

[Alex Deucher]

We were registering the aux device in the MST late_register
rather than the regular one.

Fixes: 405a1f9090d1ac ("drm/amdgpu/display: split dp connector registration (v4)")
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1100
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c      | 10 +++++++++-
 .../drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c    |  8 ++++----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 417925a0d739..c113b676218d 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4738,10 +4738,18 @@ amdgpu_dm_connector_atomic_duplicate_state(struct drm_connector *connector)
 static int
 amdgpu_dm_connector_late_register(struct drm_connector *connector)
 {
-#if defined(CONFIG_DEBUG_FS)
 	struct amdgpu_dm_connector *amdgpu_dm_connector =
 		to_amdgpu_dm_connector(connector);
+	int r;
 
+	if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+		amdgpu_dm_connector->dm_dp_aux.aux.dev = connector->kdev;
+		r = drm_dp_aux_register(&amdgpu_dm_connector->dm_dp_aux.aux);
+		if (r)
+			return r;
+	}
+
+#if defined(CONFIG_DEBUG_FS)
 	connector_debugfs_init(amdgpu_dm_connector);
 #endif
 
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 cb49f13c1548..7d28b0482127 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
@@ -113,16 +113,16 @@ amdgpu_dm_mst_connector_late_register(struct drm_connector *connector)
 		to_amdgpu_dm_connector(connector);
 	int r;
 
-	amdgpu_dm_connector->dm_dp_aux.aux.dev = connector->kdev;
-	r = drm_dp_aux_register(&amdgpu_dm_connector->dm_dp_aux.aux);
-	if (r)
+	r = drm_dp_mst_connector_late_register(connector,
+					       amdgpu_dm_connector->port);
+	if (r < 0)
 		return r;
 
 #if defined(CONFIG_DEBUG_FS)
 	connector_debugfs_init(amdgpu_dm_connector);
 #endif
 
-	return r;
+	return 0;
 }
 
 static void
-- 
2.25.2