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/*
* Copyright (C) 2014 Motorola Mobility LLC.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/notifier.h>
#include <linux/display_notify.h>
static BLOCKING_NOTIFIER_HEAD(display_notifier_list);
/**
* display_register_notify - register a notifier callback for triggering display init
* @nb: pointer to the notifier block for the callback events.
*
*/
void display_register_notify(struct notifier_block *nb)
{
blocking_notifier_chain_register(&display_notifier_list, nb);
}
EXPORT_SYMBOL_GPL(display_register_notify);
/**
* display_unregister_notify - unregister a notifier callback
* @nb: pointer to the notifier block for the callback events.
*
* display_register_notify() must have been previously called
* for this function to work properly.
*/
void display_unregister_notify(struct notifier_block *nb)
{
blocking_notifier_chain_unregister(&display_notifier_list, nb);
}
EXPORT_SYMBOL_GPL(display_unregister_notify);
void display_notify_subscriber(unsigned long event)
{
blocking_notifier_call_chain(&display_notifier_list, event, NULL);
}
EXPORT_SYMBOL_GPL(display_notify_subscriber);
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