1 // SPDX-License-Identifier: GPL-2.0+
33  * with the DRM device. At that point the connector becomes fully usable, no
42  * operation flags (&drm_bridge->ops) and bridge output type
43  * (&drm_bridge->type), as well as the DRM_BRIDGE_ATTACH_NO_CONNECTOR attach
48  * struct drm_bridge_connector - A connector backed by a chain of bridges
72 	 * hot-plug detection notification, if any (see &DRM_BRIDGE_OP_HPD).
94 /* -----------------------------------------------------------------------------
95  * Bridge Connector Hot-Plug Handling
106 	drm_for_each_bridge_in_chain(bridge_connector->encoder, bridge) {  in drm_bridge_connector_hpd_notify()
107 		if (bridge->funcs->hpd_notify)  in drm_bridge_connector_hpd_notify()
108 			bridge->funcs->hpd_notify(bridge, status);  in drm_bridge_connector_hpd_notify()
115 	struct drm_connector *connector = &drm_bridge_connector->base;  in drm_bridge_connector_handle_hpd()
116 	struct drm_device *dev = connector->dev;  in drm_bridge_connector_handle_hpd()
118 	mutex_lock(&dev->mode_config.mutex);  in drm_bridge_connector_handle_hpd()
119 	connector->status = status;  in drm_bridge_connector_handle_hpd()
120 	mutex_unlock(&dev->mode_config.mutex);  in drm_bridge_connector_handle_hpd()
146 	struct drm_bridge *hpd = bridge_connector->bridge_hpd;  in drm_bridge_connector_enable_hpd()  local
148 	if (hpd)  in drm_bridge_connector_enable_hpd()
149 		drm_bridge_hpd_enable(hpd, drm_bridge_connector_hpd_cb,  in drm_bridge_connector_enable_hpd()
157 	struct drm_bridge *hpd = bridge_connector->bridge_hpd;  in drm_bridge_connector_disable_hpd()  local
159 	if (hpd)  in drm_bridge_connector_disable_hpd()
160 		drm_bridge_hpd_disable(hpd);  in drm_bridge_connector_disable_hpd()
163 /* -----------------------------------------------------------------------------
172 	struct drm_bridge *detect = bridge_connector->bridge_detect;  in drm_bridge_connector_detect()
176 		status = detect->funcs->detect(detect);  in drm_bridge_connector_detect()
180 		switch (connector->connector_type) {  in drm_bridge_connector_detect()
204 	fwnode_handle_put(connector->fwnode);  in drm_bridge_connector_destroy()
214 	struct drm_encoder *encoder = bridge_connector->encoder;  in drm_bridge_connector_debugfs_init()
217 	list_for_each_entry(bridge, &encoder->bridge_chain, chain_node) {  in drm_bridge_connector_debugfs_init()
218 		if (bridge->funcs->debugfs_init)  in drm_bridge_connector_debugfs_init()
219 			bridge->funcs->debugfs_init(bridge, root);  in drm_bridge_connector_debugfs_init()
234 /* -----------------------------------------------------------------------------
276 	bridge = bridge_connector->bridge_edid;  in drm_bridge_connector_get_modes()
284 	bridge = bridge_connector->bridge_modes;  in drm_bridge_connector_get_modes()
286 		return bridge->funcs->get_modes(bridge, connector);  in drm_bridge_connector_get_modes()
298 	/* No need for .mode_valid(), the bridges are checked by the core. */
303 /* -----------------------------------------------------------------------------
308  * drm_bridge_connector_init - Initialise a connector for a chain of bridges
315  * (&drm_bridge->ops) and bridge output type (&drm_bridge->type), and none of
333 		return ERR_PTR(-ENOMEM);  in drm_bridge_connector_init()
335 	bridge_connector->encoder = encoder;  in drm_bridge_connector_init()
341 	connector = &bridge_connector->base;  in drm_bridge_connector_init()
342 	connector->interlace_allowed = true;  in drm_bridge_connector_init()
346 	 * bridges in the pipeline that support HPD and output detection. Then  in drm_bridge_connector_init()
347 	 * initialise the connector polling mode, using HPD if available and  in drm_bridge_connector_init()
348 	 * falling back to polling if supported. If neither HPD nor output  in drm_bridge_connector_init()
353 		if (!bridge->interlace_allowed)  in drm_bridge_connector_init()
354 			connector->interlace_allowed = false;  in drm_bridge_connector_init()
356 		if (bridge->ops & DRM_BRIDGE_OP_EDID)  in drm_bridge_connector_init()
357 			bridge_connector->bridge_edid = bridge;  in drm_bridge_connector_init()
358 		if (bridge->ops & DRM_BRIDGE_OP_HPD)  in drm_bridge_connector_init()
359 			bridge_connector->bridge_hpd = bridge;  in drm_bridge_connector_init()
360 		if (bridge->ops & DRM_BRIDGE_OP_DETECT)  in drm_bridge_connector_init()
361 			bridge_connector->bridge_detect = bridge;  in drm_bridge_connector_init()
362 		if (bridge->ops & DRM_BRIDGE_OP_MODES)  in drm_bridge_connector_init()
363 			bridge_connector->bridge_modes = bridge;  in drm_bridge_connector_init()
366 			connector_type = bridge->type;  in drm_bridge_connector_init()
370 		    bridge->of_node)  in drm_bridge_connector_init()
371 			connector->fwnode = fwnode_handle_get(of_fwnode_handle(bridge->of_node));  in drm_bridge_connector_init()
374 		if (bridge->ddc)  in drm_bridge_connector_init()
375 			ddc = bridge->ddc;  in drm_bridge_connector_init()
383 		return ERR_PTR(-EINVAL);  in drm_bridge_connector_init()
396 	if (bridge_connector->bridge_hpd)  in drm_bridge_connector_init()
397 		connector->polled = DRM_CONNECTOR_POLL_HPD;  in drm_bridge_connector_init()
398 	else if (bridge_connector->bridge_detect)  in drm_bridge_connector_init()
399 		connector->polled = DRM_CONNECTOR_POLL_CONNECT  in drm_bridge_connector_init()