linux/include/drm/display/drm_dp_aux_bus.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright 2021 Google Inc.
 *
 * The DP AUX bus is used for devices that are connected over a DisplayPort
 * AUX bus. The devices on the far side of the bus are referred to as
 * endpoints in this code.
 */

#ifndef _DP_AUX_BUS_H_
#define _DP_AUX_BUS_H_

#include <linux/device.h>
#include <linux/mod_devicetable.h>

/**
 * struct dp_aux_ep_device - Main dev structure for DP AUX endpoints
 *
 * This is used to instantiate devices that are connected via a DP AUX
 * bus. Usually the device is a panel, but conceivable other devices could
 * be hooked up there.
 */
struct dp_aux_ep_device { … };

struct dp_aux_ep_driver { … };

static inline struct dp_aux_ep_device *to_dp_aux_ep_dev(struct device *dev)
{ … }

static inline struct dp_aux_ep_driver *to_dp_aux_ep_drv(struct device_driver *drv)
{ … }

int of_dp_aux_populate_bus(struct drm_dp_aux *aux,
			   int (*done_probing)(struct drm_dp_aux *aux));
void of_dp_aux_depopulate_bus(struct drm_dp_aux *aux);
int devm_of_dp_aux_populate_bus(struct drm_dp_aux *aux,
				int (*done_probing)(struct drm_dp_aux *aux));

/* Deprecated versions of the above functions. To be removed when no callers. */
static inline int of_dp_aux_populate_ep_devices(struct drm_dp_aux *aux)
{ … }

static inline int devm_of_dp_aux_populate_ep_devices(struct drm_dp_aux *aux)
{ … }

static inline void of_dp_aux_depopulate_ep_devices(struct drm_dp_aux *aux)
{ … }

#define dp_aux_dp_driver_register(aux_ep_drv) …
int __dp_aux_dp_driver_register(struct dp_aux_ep_driver *aux_ep_drv,
				struct module *owner);
void dp_aux_dp_driver_unregister(struct dp_aux_ep_driver *aux_ep_drv);

#endif /* _DP_AUX_BUS_H_ */