linux/drivers/gpu/drm/bridge/aux-bridge.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2023 Linaro Ltd.
 *
 * Author: Dmitry Baryshkov <[email protected]>
 */
#include <linux/auxiliary_bus.h>
#include <linux/module.h>
#include <linux/of.h>

#include <drm/drm_bridge.h>
#include <drm/bridge/aux-bridge.h>

static DEFINE_IDA(drm_aux_bridge_ida);

static void drm_aux_bridge_release(struct device *dev)
{ … }

static void drm_aux_bridge_unregister_adev(void *_adev)
{ … }

/**
 * drm_aux_bridge_register - Create a simple bridge device to link the chain
 * @parent: device instance providing this bridge
 *
 * Creates a simple DRM bridge that doesn't implement any drm_bridge
 * operations. Such bridges merely fill a place in the bridge chain linking
 * surrounding DRM bridges.
 *
 * Return: zero on success, negative error code on failure
 */
int drm_aux_bridge_register(struct device *parent)
{ … }
EXPORT_SYMBOL_GPL(…);

struct drm_aux_bridge_data { … };

static int drm_aux_bridge_attach(struct drm_bridge *bridge,
				 enum drm_bridge_attach_flags flags)
{ … }

static const struct drm_bridge_funcs drm_aux_bridge_funcs = …;

static int drm_aux_bridge_probe(struct auxiliary_device *auxdev,
				const struct auxiliary_device_id *id)
{ … }

static const struct auxiliary_device_id drm_aux_bridge_table[] = …;
MODULE_DEVICE_TABLE(auxiliary, drm_aux_bridge_table);

static struct auxiliary_driver drm_aux_bridge_drv = …;
module_auxiliary_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;