49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2020, The Linux Foundation. All rights reserved.
|
|
* Copyright (C) 2020 XiaoMi, Inc.
|
|
*/
|
|
|
|
#include <linux/notifier.h>
|
|
|
|
static BLOCKING_NOTIFIER_HEAD(mi_disp_notifier_list);
|
|
|
|
/**
|
|
* mi_drm_register_client - register a client notifier
|
|
* @nb: notifier block to callback on events
|
|
*
|
|
* This function registers a notifier callback function
|
|
* to msm_drm_notifier_list, which would be called when
|
|
* received unblank/power down event.
|
|
*/
|
|
int mi_disp_register_client(struct notifier_block *nb)
|
|
{
|
|
return blocking_notifier_chain_register(&mi_disp_notifier_list, nb);
|
|
}
|
|
EXPORT_SYMBOL(mi_disp_register_client);
|
|
|
|
/**
|
|
* mi_drm_unregister_client - unregister a client notifier
|
|
* @nb: notifier block to callback on events
|
|
*
|
|
* This function unregisters the callback function from
|
|
* msm_drm_notifier_list.
|
|
*/
|
|
int mi_disp_unregister_client(struct notifier_block *nb)
|
|
{
|
|
return blocking_notifier_chain_unregister(&mi_disp_notifier_list, nb);
|
|
}
|
|
EXPORT_SYMBOL(mi_disp_unregister_client);
|
|
|
|
/**
|
|
* mi_drm_notifier_call_chain - notify clients of drm_events
|
|
* @val: event MSM_DRM_EARLY_EVENT_BLANK or MSM_DRM_EVENT_BLANK
|
|
* @v: notifier data, inculde display id and display blank
|
|
* event(unblank or power down).
|
|
*/
|
|
int mi_disp_notifier_call_chain(unsigned long val, void *v)
|
|
{
|
|
return blocking_notifier_call_chain(&mi_disp_notifier_list, val, v);
|
|
}
|
|
EXPORT_SYMBOL(mi_disp_notifier_call_chain);
|