1 // SPDX-License-Identifier: GPL-2.0+
31  * with the DRM device. At that point the connector becomes fully usable, no
40  * operation flags (&drm_bridge->ops) and bridge output type
41  * (&drm_bridge->type), as well as the DRM_BRIDGE_ATTACH_NO_CONNECTOR attach
46  * struct drm_bridge_connector - A connector backed by a chain of bridges
70 	 * hot-plug detection notification, if any (see &DRM_BRIDGE_OP_HPD).
92 /* -----------------------------------------------------------------------------
93  * Bridge Connector Hot-Plug Handling
104 	drm_for_each_bridge_in_chain(bridge_connector->encoder, bridge) {  in drm_bridge_connector_hpd_notify()
105 		if (bridge->funcs->hpd_notify)  in drm_bridge_connector_hpd_notify()
106 			bridge->funcs->hpd_notify(bridge, status);  in drm_bridge_connector_hpd_notify()
114 	struct drm_connector *connector = &drm_bridge_connector->base;  in drm_bridge_connector_hpd_cb()
115 	struct drm_device *dev = connector->dev;  in drm_bridge_connector_hpd_cb()
118 	mutex_lock(&dev->mode_config.mutex);  in drm_bridge_connector_hpd_cb()
119 	old_status = connector->status;  in drm_bridge_connector_hpd_cb()
120 	connector->status = status;  in drm_bridge_connector_hpd_cb()
121 	mutex_unlock(&dev->mode_config.mutex);  in drm_bridge_connector_hpd_cb()
132  * drm_bridge_connector_enable_hpd - Enable hot-plug detection for the connector
135  * This function enables hot-plug detection for the given bridge connector.
142 	struct drm_bridge *hpd = bridge_connector->bridge_hpd;  in drm_bridge_connector_enable_hpd()  local
144 	if (hpd)  in drm_bridge_connector_enable_hpd()
145 		drm_bridge_hpd_enable(hpd, drm_bridge_connector_hpd_cb,  in drm_bridge_connector_enable_hpd()
151  * drm_bridge_connector_disable_hpd - Disable hot-plug detection for the
155  * This function disables hot-plug detection for the given bridge connector.
162 	struct drm_bridge *hpd = bridge_connector->bridge_hpd;  in drm_bridge_connector_disable_hpd()  local
164 	if (hpd)  in drm_bridge_connector_disable_hpd()
165 		drm_bridge_hpd_disable(hpd);  in drm_bridge_connector_disable_hpd()
169 /* -----------------------------------------------------------------------------
178 	struct drm_bridge *detect = bridge_connector->bridge_detect;  in drm_bridge_connector_detect()
182 		status = detect->funcs->detect(detect);  in drm_bridge_connector_detect()
186 		switch (connector->connector_type) {  in drm_bridge_connector_detect()
207 	if (bridge_connector->bridge_hpd) {  in drm_bridge_connector_destroy()
208 		struct drm_bridge *hpd = bridge_connector->bridge_hpd;  in drm_bridge_connector_destroy()  local
210 		drm_bridge_hpd_disable(hpd);  in drm_bridge_connector_destroy()
224 	struct drm_encoder *encoder = bridge_connector->encoder;  in drm_bridge_connector_debugfs_init()
227 	list_for_each_entry(bridge, &encoder->bridge_chain, chain_node) {  in drm_bridge_connector_debugfs_init()
228 		if (bridge->funcs->debugfs_init)  in drm_bridge_connector_debugfs_init()
229 			bridge->funcs->debugfs_init(bridge, root);  in drm_bridge_connector_debugfs_init()
243 /* -----------------------------------------------------------------------------
258 	edid = bridge->funcs->get_edid(bridge, connector);  in drm_bridge_connector_get_modes_edid()
285 	bridge = bridge_connector->bridge_edid;  in drm_bridge_connector_get_modes()
293 	bridge = bridge_connector->bridge_modes;  in drm_bridge_connector_get_modes()
295 		return bridge->funcs->get_modes(bridge, connector);  in drm_bridge_connector_get_modes()
307 	/* No need for .mode_valid(), the bridges are checked by the core. */
310 /* -----------------------------------------------------------------------------
315  * drm_bridge_connector_init - Initialise a connector for a chain of bridges
322  * (&drm_bridge->ops) and bridge output type (&drm_bridge->type), and none of
339 		return ERR_PTR(-ENOMEM);  in drm_bridge_connector_init()
341 	bridge_connector->encoder = encoder;  in drm_bridge_connector_init()
347 	connector = &bridge_connector->base;  in drm_bridge_connector_init()
348 	connector->interlace_allowed = true;  in drm_bridge_connector_init()
352 	 * bridges in the pipeline that support HPD and output detection. Then  in drm_bridge_connector_init()
353 	 * initialise the connector polling mode, using HPD if available and  in drm_bridge_connector_init()
354 	 * falling back to polling if supported. If neither HPD nor output  in drm_bridge_connector_init()
359 		if (!bridge->interlace_allowed)  in drm_bridge_connector_init()
360 			connector->interlace_allowed = false;  in drm_bridge_connector_init()
362 		if (bridge->ops & DRM_BRIDGE_OP_EDID)  in drm_bridge_connector_init()
363 			bridge_connector->bridge_edid = bridge;  in drm_bridge_connector_init()
364 		if (bridge->ops & DRM_BRIDGE_OP_HPD)  in drm_bridge_connector_init()
365 			bridge_connector->bridge_hpd = bridge;  in drm_bridge_connector_init()
366 		if (bridge->ops & DRM_BRIDGE_OP_DETECT)  in drm_bridge_connector_init()
367 			bridge_connector->bridge_detect = bridge;  in drm_bridge_connector_init()
368 		if (bridge->ops & DRM_BRIDGE_OP_MODES)  in drm_bridge_connector_init()
369 			bridge_connector->bridge_modes = bridge;  in drm_bridge_connector_init()
372 			connector_type = bridge->type;  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()
390 	if (bridge_connector->bridge_hpd) {  in drm_bridge_connector_init()
391 		connector->polled = DRM_CONNECTOR_POLL_HPD;  in drm_bridge_connector_init()
394 	else if (bridge_connector->bridge_detect)  in drm_bridge_connector_init()
395 		connector->polled = DRM_CONNECTOR_POLL_CONNECT  in drm_bridge_connector_init()