29  * The DRM bridge connector helper object provides a DRM connector
35  * To use the helper, display controller drivers create a bridge connector with
41  * The DRM bridge connector operations are implemented based on the operations
43  * to the bridge closest to the connector (at the end of the chain) that
46  * To make use of this helper, all bridges in the chain shall report bridge
47  * operation flags (&drm_bridge->ops) and bridge output type
69 	 * The last bridge in the chain (closest to the connector) that provides
76 	 * The last bridge in the chain (closest to the connector) that provides
83 	 * The last bridge in the chain (closest to the connector) that provides
90 	 * The last bridge in the chain (closest to the connector) that provides
97 	 * The bridge in the chain that implements necessary support for the
107  * Bridge Connector Hot-Plug Handling
115 	struct drm_bridge *bridge;  in drm_bridge_connector_hpd_notify()  local
118 	drm_for_each_bridge_in_chain(bridge_connector->encoder, bridge) {  in drm_bridge_connector_hpd_notify()
119 		if (bridge->funcs->hpd_notify)  in drm_bridge_connector_hpd_notify()
120 			bridge->funcs->hpd_notify(bridge, status);  in drm_bridge_connector_hpd_notify()
176  * Bridge Connector Functions
228 	struct drm_bridge *bridge;  in drm_bridge_connector_debugfs_init()  local
230 	list_for_each_entry(bridge, &encoder->bridge_chain, chain_node) {  in drm_bridge_connector_debugfs_init()
231 		if (bridge->funcs->debugfs_init)  in drm_bridge_connector_debugfs_init()
232 			bridge->funcs->debugfs_init(bridge, root);  in drm_bridge_connector_debugfs_init()
259  * Bridge Connector Helper Functions
263 					       struct drm_bridge *bridge)  in drm_bridge_connector_get_modes_edid()  argument
273 	drm_edid = drm_bridge_edid_read(bridge, connector);  in drm_bridge_connector_get_modes_edid()
294 	struct drm_bridge *bridge;  in drm_bridge_connector_get_modes()  local
297 	 * If there is a HDMI bridge, EDID has been updated as a part of  in drm_bridge_connector_get_modes()
300 	bridge = bridge_connector->bridge_hdmi;  in drm_bridge_connector_get_modes()
301 	if (bridge)  in drm_bridge_connector_get_modes()
308 	bridge = bridge_connector->bridge_edid;  in drm_bridge_connector_get_modes()
309 	if (bridge)  in drm_bridge_connector_get_modes()
310 		return drm_bridge_connector_get_modes_edid(connector, bridge);  in drm_bridge_connector_get_modes()
316 	bridge = bridge_connector->bridge_modes;  in drm_bridge_connector_get_modes()
317 	if (bridge)  in drm_bridge_connector_get_modes()
318 		return bridge->funcs->get_modes(bridge, connector);  in drm_bridge_connector_get_modes()
368 	struct drm_bridge *bridge;  in drm_bridge_connector_tmds_char_rate_valid()  local
370 	bridge = bridge_connector->bridge_hdmi;  in drm_bridge_connector_tmds_char_rate_valid()
371 	if (!bridge)  in drm_bridge_connector_tmds_char_rate_valid()
374 	if (bridge->funcs->hdmi_tmds_char_rate_valid)  in drm_bridge_connector_tmds_char_rate_valid()
375 		return bridge->funcs->hdmi_tmds_char_rate_valid(bridge, mode, tmds_rate);  in drm_bridge_connector_tmds_char_rate_valid()
385 	struct drm_bridge *bridge;  in drm_bridge_connector_clear_infoframe()  local
387 	bridge = bridge_connector->bridge_hdmi;  in drm_bridge_connector_clear_infoframe()
388 	if (!bridge)  in drm_bridge_connector_clear_infoframe()
391 	return bridge->funcs->hdmi_clear_infoframe(bridge, type);  in drm_bridge_connector_clear_infoframe()
400 	struct drm_bridge *bridge;  in drm_bridge_connector_write_infoframe()  local
402 	bridge = bridge_connector->bridge_hdmi;  in drm_bridge_connector_write_infoframe()
403 	if (!bridge)  in drm_bridge_connector_write_infoframe()
406 	return bridge->funcs->hdmi_write_infoframe(bridge, type, buffer, len);  in drm_bridge_connector_write_infoframe()
414 	struct drm_bridge *bridge;  in drm_bridge_connector_read_edid()  local
416 	bridge = bridge_connector->bridge_edid;  in drm_bridge_connector_read_edid()
417 	if (!bridge)  in drm_bridge_connector_read_edid()
420 	return drm_bridge_edid_read(bridge, connector);  in drm_bridge_connector_read_edid()
434 	struct drm_bridge *bridge;  in drm_bridge_connector_audio_startup()  local
436 	bridge = bridge_connector->bridge_hdmi;  in drm_bridge_connector_audio_startup()
437 	if (!bridge)  in drm_bridge_connector_audio_startup()
440 	if (!bridge->funcs->hdmi_audio_startup)  in drm_bridge_connector_audio_startup()
443 	return bridge->funcs->hdmi_audio_startup(connector, bridge);  in drm_bridge_connector_audio_startup()
452 	struct drm_bridge *bridge;  in drm_bridge_connector_audio_prepare()  local
454 	bridge = bridge_connector->bridge_hdmi;  in drm_bridge_connector_audio_prepare()
455 	if (!bridge)  in drm_bridge_connector_audio_prepare()
458 	return bridge->funcs->hdmi_audio_prepare(connector, bridge, fmt, hparms);  in drm_bridge_connector_audio_prepare()
465 	struct drm_bridge *bridge;  in drm_bridge_connector_audio_shutdown()  local
467 	bridge = bridge_connector->bridge_hdmi;  in drm_bridge_connector_audio_shutdown()
468 	if (!bridge)  in drm_bridge_connector_audio_shutdown()
471 	bridge->funcs->hdmi_audio_shutdown(connector, bridge);  in drm_bridge_connector_audio_shutdown()
479 	struct drm_bridge *bridge;  in drm_bridge_connector_audio_mute_stream()  local
481 	bridge = bridge_connector->bridge_hdmi;  in drm_bridge_connector_audio_mute_stream()
482 	if (!bridge)  in drm_bridge_connector_audio_mute_stream()
485 	if (bridge->funcs->hdmi_audio_mute_stream)  in drm_bridge_connector_audio_mute_stream()
486 		return bridge->funcs->hdmi_audio_mute_stream(connector, bridge,  in drm_bridge_connector_audio_mute_stream()
500  * Bridge Connector Initialisation
506  * @encoder: the encoder where the bridge chain starts
510  * the @encoder. All bridges in the chain shall report bridge operation flags
511  * (&drm_bridge->ops) and bridge output type (&drm_bridge->type), and none of
523 	struct drm_bridge *bridge, *panel_bridge = NULL;  in drm_bridge_connector_init()  local
550 	drm_for_each_bridge_in_chain(encoder, bridge) {  in drm_bridge_connector_init()
551 		if (!bridge->interlace_allowed)  in drm_bridge_connector_init()
553 		if (!bridge->ycbcr_420_allowed)  in drm_bridge_connector_init()
556 		if (bridge->ops & DRM_BRIDGE_OP_EDID)  in drm_bridge_connector_init()
557 			bridge_connector->bridge_edid = bridge;  in drm_bridge_connector_init()
558 		if (bridge->ops & DRM_BRIDGE_OP_HPD)  in drm_bridge_connector_init()
559 			bridge_connector->bridge_hpd = bridge;  in drm_bridge_connector_init()
560 		if (bridge->ops & DRM_BRIDGE_OP_DETECT)  in drm_bridge_connector_init()
561 			bridge_connector->bridge_detect = bridge;  in drm_bridge_connector_init()
562 		if (bridge->ops & DRM_BRIDGE_OP_MODES)  in drm_bridge_connector_init()
563 			bridge_connector->bridge_modes = bridge;  in drm_bridge_connector_init()
564 		if (bridge->ops & DRM_BRIDGE_OP_HDMI) {  in drm_bridge_connector_init()
567 			if (!bridge->funcs->hdmi_write_infoframe ||  in drm_bridge_connector_init()
568 			    !bridge->funcs->hdmi_clear_infoframe)  in drm_bridge_connector_init()
571 			bridge_connector->bridge_hdmi = bridge;  in drm_bridge_connector_init()
573 			if (bridge->supported_formats)  in drm_bridge_connector_init()
574 				supported_formats = bridge->supported_formats;  in drm_bridge_connector_init()
575 			if (bridge->max_bpc)  in drm_bridge_connector_init()
576 				max_bpc = bridge->max_bpc;  in drm_bridge_connector_init()
579 		if (!drm_bridge_get_next_bridge(bridge))  in drm_bridge_connector_init()
580 			connector_type = bridge->type;  in drm_bridge_connector_init()
583 		if (!drm_bridge_get_next_bridge(bridge) &&  in drm_bridge_connector_init()
584 		    bridge->of_node)  in drm_bridge_connector_init()
585 			connector->fwnode = fwnode_handle_get(of_fwnode_handle(bridge->of_node));  in drm_bridge_connector_init()
588 		if (bridge->ddc)  in drm_bridge_connector_init()
589 			ddc = bridge->ddc;  in drm_bridge_connector_init()
591 		if (drm_bridge_is_panel(bridge))  in drm_bridge_connector_init()
592 			panel_bridge = bridge;  in drm_bridge_connector_init()
602 		bridge = bridge_connector->bridge_hdmi;  in drm_bridge_connector_init()
615 		if (bridge->hdmi_audio_max_i2s_playback_channels ||  in drm_bridge_connector_init()
616 		    bridge->hdmi_audio_spdif_playback) {  in drm_bridge_connector_init()
617 			if (!bridge->funcs->hdmi_audio_prepare ||  in drm_bridge_connector_init()
618 			    !bridge->funcs->hdmi_audio_shutdown)  in drm_bridge_connector_init()
622 							    bridge->hdmi_audio_dev,  in drm_bridge_connector_init()
624 							    bridge->hdmi_audio_max_i2s_playback_channels,  in drm_bridge_connector_init()
625 							    bridge->hdmi_audio_spdif_playback,  in drm_bridge_connector_init()
626 							    bridge->hdmi_audio_dai_port);  in drm_bridge_connector_init()