LXR linux/include/drm/dp/drm_dp_aux

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright 2021 Google Inc.
   4 *
   5 * The DP AUX bus is used for devices that are connected over a DisplayPort
   6 * AUX bus. The devices on the far side of the bus are referred to as
   7 * endpoints in this code.
   8 */
   9
  10#ifndef _DP_AUX_BUS_H_
  11#define _DP_AUX_BUS_H_
  12
  13#include <linux/device.h>
  14#include <linux/mod_devicetable.h>
  15
  16/**
  17 * struct dp_aux_ep_device - Main dev structure for DP AUX endpoints
  18 *
  19 * This is used to instantiate devices that are connected via a DP AUX
  20 * bus. Usually the device is a panel, but conceivable other devices could
  21 * be hooked up there.
  22 */
  23struct dp_aux_ep_device {
  24        /** @dev: The normal dev pointer */
  25        struct device dev;
  26        /** @aux: Pointer to the aux bus */
  27        struct drm_dp_aux *aux;
  28};
  29
  30struct dp_aux_ep_driver {
  31        int (*probe)(struct dp_aux_ep_device *aux_ep);
  32        void (*remove)(struct dp_aux_ep_device *aux_ep);
  33        void (*shutdown)(struct dp_aux_ep_device *aux_ep);
  34        struct device_driver driver;
  35};
  36
  37static inline struct dp_aux_ep_device *to_dp_aux_ep_dev(struct device *dev)
  38{
  39        return container_of(dev, struct dp_aux_ep_device, dev);
  40}
  41
  42static inline struct dp_aux_ep_driver *to_dp_aux_ep_drv(struct device_driver *drv)
  43{
  44        return container_of(drv, struct dp_aux_ep_driver, driver);
  45}
  46
  47int of_dp_aux_populate_ep_devices(struct drm_dp_aux *aux);
  48void of_dp_aux_depopulate_ep_devices(struct drm_dp_aux *aux);
  49int devm_of_dp_aux_populate_ep_devices(struct drm_dp_aux *aux);
  50
  51#define dp_aux_dp_driver_register(aux_ep_drv) \
  52        __dp_aux_dp_driver_register(aux_ep_drv, THIS_MODULE)
  53int __dp_aux_dp_driver_register(struct dp_aux_ep_driver *aux_ep_drv,
  54                                struct module *owner);
  55void dp_aux_dp_driver_unregister(struct dp_aux_ep_driver *aux_ep_drv);
  56
  57#endif /* _DP_AUX_BUS_H_ */
  58