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/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only 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.
*
*/
#ifndef __AUDIO_PDR_H_
#define __AUDIO_PDR_H_
enum {
AUDIO_PDR_DOMAIN_ADSP,
AUDIO_PDR_DOMAIN_MAX
};
enum {
AUDIO_PDR_FRAMEWORK_DOWN,
AUDIO_PDR_FRAMEWORK_UP
};
#ifdef CONFIG_MSM_QDSP6_PDR
/*
* Use audio_pdr_register to register with the PDR subsystem this
* should be done before module late init otherwise notification
* of the AUDIO_PDR_FRAMEWORK_UP cannot be guaranteed.
*
* *nb - Pointer to a notifier block. Provide a callback function
* to be notified once the PDR framework has been initialized.
* Callback will receive either the AUDIO_PDR_FRAMEWORK_DOWN
* or AUDIO_PDR_FRAMEWORK_UP ioctl depending on the state of
* the PDR framework.
*
* Returns: Success: 0
* Failure: Error code
*/
int audio_pdr_register(struct notifier_block *nb);
/*
* Use audio_pdr_service_register to register with a PDR service
* Function should be called after nb callback registered with
* audio_pdr_register has been called back with the
* AUDIO_PDR_FRAMEWORK_UP ioctl.
*
* domain_id - Domain to use, example: AUDIO_PDR_ADSP
* *nb - Pointer to a notifier block. Provide a callback function
* that will be notified of the state of the domain
* requested. The ioctls received by the callback are
* defined in service-notifier.h.
*
* Returns: Success: Client handle
* Failure: Pointer error code
*/
void *audio_pdr_service_register(int domain_id,
struct notifier_block *nb, int *curr_state);
/*
* Use audio_pdr_service_deregister to deregister with a PDR
* service that was registered using the audio_pdr_service_register
* API.
*
* *service_handle - Service handle returned by audio_pdr_service_register
* *nb - Pointer to the notifier block. Used in the call to
* audio_pdr_service_register.
*
* Returns: Success: Client handle
* Failure: Error code
*/
int audio_pdr_service_deregister(void *service_handle,
struct notifier_block *nb);
#else
static inline int audio_pdr_register(struct notifier_block *nb)
{
return -ENODEV;
}
static inline void *audio_pdr_service_register(int domain_id,
struct notifier_block *nb,
int *curr_state)
{
return NULL;
}
static inline int audio_pdr_service_deregister(void *service_handle,
struct notifier_block *nb)
{
return 0;
}
#endif /* CONFIG_MSM_QDSP6_PDR */
#endif
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