1 // SPDX-License-Identifier: GPL-2.0-only
27  * drm_of_crtc_port_mask - find the mask of a registered CRTC by port OF node
41 		if (tmp->port == port)  in drm_of_crtc_port_mask()
52  * drm_of_find_possible_crtcs - find the possible CRTCs for an encoder port
85  * drm_of_component_match_add - Add a component helper OF node match rule
103  * drm_of_component_probe - Generic probe function for a component based master
119 	struct device_node *ep, *port, *remote;  in drm_of_component_probe()  local
123 	if (!dev->of_node)  in drm_of_component_probe()
124 		return -EINVAL;  in drm_of_component_probe()
131 		port = of_parse_phandle(dev->of_node, "ports", i);  in drm_of_component_probe()
135 		if (of_device_is_available(port->parent))  in drm_of_component_probe()
144 		return -ENODEV;  in drm_of_component_probe()
149 		return -ENODEV;  in drm_of_component_probe()
153 	 * For bound crtcs, bind the encoders attached to their remote endpoint  in drm_of_component_probe()
156 		port = of_parse_phandle(dev->of_node, "ports", i);  in drm_of_component_probe()
160 		if (!of_device_is_available(port->parent)) {  in drm_of_component_probe()
166 			remote = of_graph_get_remote_port_parent(ep);  in drm_of_component_probe()
167 			if (!remote || !of_device_is_available(remote)) {  in drm_of_component_probe()
168 				of_node_put(remote);  in drm_of_component_probe()
170 			} else if (!of_device_is_available(remote->parent)) {  in drm_of_component_probe()
172 					 remote);  in drm_of_component_probe()
173 				of_node_put(remote);  in drm_of_component_probe()
178 						   remote);  in drm_of_component_probe()
179 			of_node_put(remote);  in drm_of_component_probe()
189  * drm_of_encoder_active_endpoint - return the active encoder endpoint
194  * parse the encoder endpoint connecting to the crtc port.
198 				   struct of_endpoint *endpoint)  in drm_of_encoder_active_endpoint()  argument
201 	struct drm_crtc *crtc = encoder->crtc;  in drm_of_encoder_active_endpoint()
206 		return -EINVAL;  in drm_of_encoder_active_endpoint()
211 		if (port == crtc->port) {  in drm_of_encoder_active_endpoint()
212 			ret = of_graph_parse_endpoint(ep, endpoint);  in drm_of_encoder_active_endpoint()
218 	return -EINVAL;  in drm_of_encoder_active_endpoint()
223  * drm_of_find_panel_or_bridge - return connected panel or bridge device
226  * @endpoint: endpoint in the device tree node
230  * Given a DT node's port and endpoint number, find the connected node and
237 				int port, int endpoint,  in drm_of_find_panel_or_bridge()  argument
241 	int ret = -EPROBE_DEFER;  in drm_of_find_panel_or_bridge()
242 	struct device_node *remote;  in drm_of_find_panel_or_bridge()  local
245 		return -EINVAL;  in drm_of_find_panel_or_bridge()
253 	 * device-tree node.  in drm_of_find_panel_or_bridge()
256 		return -ENODEV;  in drm_of_find_panel_or_bridge()
258 	remote = of_graph_get_remote_node(np, port, endpoint);  in drm_of_find_panel_or_bridge()
259 	if (!remote)  in drm_of_find_panel_or_bridge()
260 		return -ENODEV;  in drm_of_find_panel_or_bridge()
263 		*panel = of_drm_find_panel(remote);  in drm_of_find_panel_or_bridge()
273 			*bridge = of_drm_find_bridge(remote);  in drm_of_find_panel_or_bridge()
282 	of_node_put(remote);  in drm_of_find_panel_or_bridge()
295 		of_property_read_bool(port_node, "dual-lvds-even-pixels");  in drm_of_lvds_get_port_pixels_type()
297 		of_property_read_bool(port_node, "dual-lvds-odd-pixels");  in drm_of_lvds_get_port_pixels_type()
306 	struct device_node *endpoint = NULL;  in drm_of_lvds_get_remote_pixels_type()  local
307 	int pixels_type = -EPIPE;  in drm_of_lvds_get_remote_pixels_type()
309 	for_each_child_of_node(port_node, endpoint) {  in drm_of_lvds_get_remote_pixels_type()
313 		if (!of_node_name_eq(endpoint, "endpoint"))  in drm_of_lvds_get_remote_pixels_type()
316 		remote_port = of_graph_get_remote_port(endpoint);  in drm_of_lvds_get_remote_pixels_type()
319 			return -EPIPE;  in drm_of_lvds_get_remote_pixels_type()
328 		 * Sanity check, ensure that all remote endpoints have the same  in drm_of_lvds_get_remote_pixels_type()
330 		 * support multiple sinks with different dual-link  in drm_of_lvds_get_remote_pixels_type()
335 			return -EINVAL;  in drm_of_lvds_get_remote_pixels_type()
342  * drm_of_lvds_get_dual_link_pixel_order - Get LVDS dual-link pixel order
343  * @port1: First DT port node of the Dual-link LVDS source
344  * @port2: Second DT port node of the Dual-link LVDS source
346  * An LVDS dual-link connection is made of two links, with even pixels
348  * returns, for two ports of an LVDS dual-link source, which port shall transmit
351  * The pixel order is determined from the dual-lvds-even-pixels and
352  * dual-lvds-odd-pixels properties in the sink's DT port nodes. If those
354  * returns -EINVAL.
356  * If either port is not connected, this function returns -EPIPE.
363  * * DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS - @port1 carries even pixels and @port2
365  * * DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS - @port1 carries odd pixels and @port2
367  * * -EINVAL - @port1 and @port2 are not connected to a dual-link LVDS sink, or
369  * * -EPIPE - when @port1 or @port2 are not connected
377 		return -EINVAL;  in drm_of_lvds_get_dual_link_pixel_order()
388 	 * A valid dual-lVDS bus is found when one remote port is marked with  in drm_of_lvds_get_dual_link_pixel_order()
389 	 * "dual-lvds-even-pixels", and the other remote port is marked with  in drm_of_lvds_get_dual_link_pixel_order()
390 	 * "dual-lvds-odd-pixels", bail out if the markers are not right.  in drm_of_lvds_get_dual_link_pixel_order()
393 		return -EINVAL;  in drm_of_lvds_get_dual_link_pixel_order()