34  * DOC: drm panel
36  * The DRM panel helpers allow drivers to register panel objects with a
42  * drm_panel_init - initialize a panel
43  * @panel: DRM panel
45  * Sets up internal fields of the panel so that it can subsequently be added
48 void drm_panel_init(struct drm_panel *panel)  in drm_panel_init()  argument
50 	INIT_LIST_HEAD(&panel->list);  in drm_panel_init()
55  * drm_panel_add - add a panel to the global registry
56  * @panel: panel to add
58  * Add a panel to the global registry so that it can be looked up by display
63 int drm_panel_add(struct drm_panel *panel)  in drm_panel_add()  argument
66 	list_add_tail(&panel->list, &panel_list);  in drm_panel_add()
74  * drm_panel_remove - remove a panel from the global registry
75  * @panel: DRM panel
77  * Removes a panel from the global registry.
79 void drm_panel_remove(struct drm_panel *panel)  in drm_panel_remove()  argument
82 	list_del_init(&panel->list);  in drm_panel_remove()
88  * drm_panel_attach - attach a panel to a connector
89  * @panel: DRM panel
92  * After obtaining a pointer to a DRM panel a display driver calls this
93  * function to attach a panel to a connector.
95  * An error is returned if the panel is already attached to another connector.
97  * When unloading, the driver should detach from the panel by calling
102 int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector)  in drm_panel_attach()  argument
104 	if (panel->connector)  in drm_panel_attach()
107 	panel->connector = connector;  in drm_panel_attach()
108 	panel->drm = connector->dev;  in drm_panel_attach()
115  * drm_panel_detach - detach a panel from a connector
116  * @panel: DRM panel
118  * Detaches a panel from the connector it is attached to. If a panel is not
121  * This function should not be called by the panel device itself. It
126 int drm_panel_detach(struct drm_panel *panel)  in drm_panel_detach()  argument
128 	panel->connector = NULL;  in drm_panel_detach()
129 	panel->drm = NULL;  in drm_panel_detach()
137  * of_drm_find_panel - look up a panel using a device tree node
138  * @np: device tree node of the panel
141  * tree node. If a matching panel is found, return a pointer to it.
143  * Return: A pointer to the panel registered for the specified device tree
144  * node or an ERR_PTR() if no panel matching the device tree node can be found.
146  * - EPROBE_DEFER: the panel device has not been probed yet, and the caller
152 	struct drm_panel *panel;  in of_drm_find_panel()  local
159 	list_for_each_entry(panel, &panel_list, list) {  in of_drm_find_panel()
160 		if (panel->dev->of_node == np) {  in of_drm_find_panel()
162 			return panel;  in of_drm_find_panel()
173 MODULE_DESCRIPTION("DRM panel infrastructure");