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57 lines
1.7 KiB
57 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright 2021 Google Inc. |
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* |
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* The DP AUX bus is used for devices that are connected over a DisplayPort |
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* AUX bus. The devices on the far side of the bus are referred to as |
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* endpoints in this code. |
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*/ |
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#ifndef _DP_AUX_BUS_H_ |
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#define _DP_AUX_BUS_H_ |
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#include <linux/device.h> |
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#include <linux/mod_devicetable.h> |
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/** |
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* struct dp_aux_ep_device - Main dev structure for DP AUX endpoints |
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* |
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* This is used to instantiate devices that are connected via a DP AUX |
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* bus. Usually the device is a panel, but conceivable other devices could |
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* be hooked up there. |
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*/ |
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struct dp_aux_ep_device { |
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/** @dev: The normal dev pointer */ |
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struct device dev; |
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/** @aux: Pointer to the aux bus */ |
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struct drm_dp_aux *aux; |
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}; |
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struct dp_aux_ep_driver { |
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int (*probe)(struct dp_aux_ep_device *aux_ep); |
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void (*remove)(struct dp_aux_ep_device *aux_ep); |
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void (*shutdown)(struct dp_aux_ep_device *aux_ep); |
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struct device_driver driver; |
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}; |
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static inline struct dp_aux_ep_device *to_dp_aux_ep_dev(struct device *dev) |
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{ |
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return container_of(dev, struct dp_aux_ep_device, dev); |
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} |
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static inline struct dp_aux_ep_driver *to_dp_aux_ep_drv(struct device_driver *drv) |
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{ |
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return container_of(drv, struct dp_aux_ep_driver, driver); |
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} |
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int of_dp_aux_populate_ep_devices(struct drm_dp_aux *aux); |
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void of_dp_aux_depopulate_ep_devices(struct drm_dp_aux *aux); |
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int devm_of_dp_aux_populate_ep_devices(struct drm_dp_aux *aux); |
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#define dp_aux_dp_driver_register(aux_ep_drv) \ |
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__dp_aux_dp_driver_register(aux_ep_drv, THIS_MODULE) |
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int __dp_aux_dp_driver_register(struct dp_aux_ep_driver *aux_ep_drv, |
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struct module *owner); |
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void dp_aux_dp_driver_unregister(struct dp_aux_ep_driver *aux_ep_drv); |
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#endif /* _DP_AUX_BUS_H_ */
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