gpu/drm/drm_bridge_connector.c

24  * The DRM bridge connector helper object provides a DRM connector
25  * implementation that wraps a chain of &struct drm_bridge. The connector
30  * To use the helper, display controller drivers create a bridge connector with
32  * connector with the chain of bridges passed to the function and registers it
33  * with the DRM device. At that point the connector becomes fully usable, no
36  * The DRM bridge connector operations are implemented based on the operations
37  * provided by the bridges in the chain. Each connector operation is delegated
38  * to the bridge closest to the connector (at the end of the chain) that
44  * flag (none of the bridges shall create a DRM connector directly).
48  * struct drm_bridge_connector - A connector backed by a chain of bridges
52 	 * @base: The base DRM connector
64 	 * The last bridge in the chain (closest to the connector) that provides
71 	 * The last bridge in the chain (closest to the connector) that provides
78 	 * The last bridge in the chain (closest to the connector) that provides
79 	 * connector detection, if any (see &DRM_BRIDGE_OP_DETECT).
85 	 * The last bridge in the chain (closest to the connector) that provides
86 	 * connector modes detection, if any (see &DRM_BRIDGE_OP_MODES).
98 static void drm_bridge_connector_hpd_notify(struct drm_connector *connector,
102 		to_drm_bridge_connector(connector);
115 	struct drm_connector *connector = &drm_bridge_connector->base;
116 	struct drm_device *dev = connector->dev;
119 	connector->status = status;
122 	drm_bridge_connector_hpd_notify(connector, status);
124 	drm_kms_helper_connector_hotplug_event(connector);
133 static void drm_bridge_connector_oob_hotplug_event(struct drm_connector *connector,
137 		to_drm_bridge_connector(connector);
142 static void drm_bridge_connector_enable_hpd(struct drm_connector *connector)
145 		to_drm_bridge_connector(connector);
153 static void drm_bridge_connector_disable_hpd(struct drm_connector *connector)
156 		to_drm_bridge_connector(connector);
168 drm_bridge_connector_detect(struct drm_connector *connector, bool force)
171 		to_drm_bridge_connector(connector);
178 		drm_bridge_connector_hpd_notify(connector, status);
180 		switch (connector->connector_type) {
196 static void drm_bridge_connector_destroy(struct drm_connector *connector)
199 		to_drm_bridge_connector(connector);
201 	drm_connector_unregister(connector);
202 	drm_connector_cleanup(connector);
204 	fwnode_handle_put(connector->fwnode);
209 static void drm_bridge_connector_debugfs_init(struct drm_connector *connector,
213 		to_drm_bridge_connector(connector);
238 static int drm_bridge_connector_get_modes_edid(struct drm_connector *connector,
245 	status = drm_bridge_connector_detect(connector, false);
249 	drm_edid = drm_bridge_edid_read(bridge, connector);
255 	drm_edid_connector_update(connector, drm_edid);
256 	n = drm_edid_connector_add_modes(connector);
262 	drm_edid_connector_update(connector, NULL);
266 static int drm_bridge_connector_get_modes(struct drm_connector *connector)
269 		to_drm_bridge_connector(connector);
278 		return drm_bridge_connector_get_modes_edid(connector, bridge);
286 		return bridge->funcs->get_modes(bridge, connector);
308  * drm_bridge_connector_init - Initialise a connector for a chain of bridges
313  * device. The connector is associated with a chain of bridges that starts at
316  * them may create a DRM connector directly.
318  * Returns a pointer to the new connector on success, or a negative error
325 	struct drm_connector *connector;
341 	connector = &bridge_connector->base;
342 	connector->interlace_allowed = true;
345 	 * Initialise connector status handling. First locate the furthest
347 	 * initialise the connector polling mode, using HPD if available and
354 			connector->interlace_allowed = false;
371 			connector->fwnode = fwnode_handle_get(of_fwnode_handle(bridge->of_node));
386 	ret = drm_connector_init_with_ddc(drm, connector,
394 	drm_connector_helper_add(connector, &drm_bridge_connector_helper_funcs);
397 		connector->polled = DRM_CONNECTOR_POLL_HPD;
399 		connector->polled = DRM_CONNECTOR_POLL_CONNECT
403 		drm_panel_bridge_set_orientation(connector, panel_bridge);
405 	return connector;