After a connector is added to the drm_mode_config::connector_list, it's
visible to any in-kernel users looking up connectors via the above list.
Make sure that the connector is properly initialized before such
look-ups, by initializing the connector with
drm_connector_dynamic_register() - which doesn't add the connector to
the list - and registering it with drm_connector_dynamic_register() -
which adds the connector to the list - after the initialization is
complete.
v2: Rebase on the change which moves adding the connector to the
connector list only later when calling
drm_connector_dynamic_register().
Cc: Lyude Paul <lyude@xxxxxxxxxx>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> (v1)
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp_mst.c | 27 +++++++--------------
1 file changed, 9 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 123c4ece62688..debe4d0eee11f 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -1731,6 +1731,8 @@ mst_topology_add_connector(struct drm_dp_mst_topology_mgr *mgr,
if (!intel_connector)
return NULL;
+ connector = &intel_connector->base;
+
intel_connector->get_hw_state = mst_connector_get_hw_state;
intel_connector->sync_state = intel_dp_connector_sync_state;
intel_connector->mst_port = intel_dp;
@@ -1739,30 +1741,19 @@ mst_topology_add_connector(struct drm_dp_mst_topology_mgr *mgr,
intel_dp_init_modeset_retry_work(intel_connector);
- /*
- * TODO: The following drm_connector specific initialization belongs
- * to DRM core, however it happens atm too late in
- * drm_connector_init(). That function will also expose the connector
- * to in-kernel users, so it can't be called until the connector is
- * sufficiently initialized; init the device pointer used by the
- * following DSC setup, until a fix moving this to DRM core.
- */
- intel_connector->base.dev = mgr->dev;
-
- intel_connector->dp.dsc_decompression_aux = drm_dp_mst_dsc_aux_for_port(port);
- intel_dp_mst_read_decompression_port_dsc_caps(intel_dp, intel_connector);
- intel_connector->dp.dsc_hblank_expansion_quirk =
- detect_dsc_hblank_expansion_quirk(intel_connector);
-
- connector = &intel_connector->base;
- ret = drm_connector_init(display->drm, connector, &mst_connector_funcs,
- DRM_MODE_CONNECTOR_DisplayPort);
+ ret = drm_connector_dynamic_init(display->drm, connector, &mst_connector_funcs,
+ DRM_MODE_CONNECTOR_DisplayPort, NULL);
if (ret) {
drm_dp_mst_put_port_malloc(port);
intel_connector_free(intel_connector);
return NULL;
}
+ intel_connector->dp.dsc_decompression_aux = drm_dp_mst_dsc_aux_for_port(port);
+ intel_dp_mst_read_decompression_port_dsc_caps(intel_dp, intel_connector);
+ intel_connector->dp.dsc_hblank_expansion_quirk =
+ detect_dsc_hblank_expansion_quirk(intel_connector);
+
drm_connector_helper_add(connector, &mst_connector_helper_funcs);
for_each_pipe(display, pipe) {
--
2.44.2
