7c1ce85ea5
git-subtree-dir: techpack/audio git-subtree-mainline:ced58f75fagit-subtree-split:bc8dfdee2a
99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
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*/
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#ifndef __AUDIO_PDR_H_
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#define __AUDIO_PDR_H_
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enum {
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AUDIO_PDR_DOMAIN_ADSP,
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AUDIO_PDR_DOMAIN_MAX
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};
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enum {
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AUDIO_PDR_FRAMEWORK_DOWN,
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AUDIO_PDR_FRAMEWORK_UP
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};
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#ifdef CONFIG_MSM_QDSP6_PDR
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/*
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* Use audio_pdr_register to register with the PDR subsystem this
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* should be done before module late init otherwise notification
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* of the AUDIO_PDR_FRAMEWORK_UP cannot be guaranteed.
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*
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* *nb - Pointer to a notifier block. Provide a callback function
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* to be notified once the PDR framework has been initialized.
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* Callback will receive either the AUDIO_PDR_FRAMEWORK_DOWN
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* or AUDIO_PDR_FRAMEWORK_UP ioctl depending on the state of
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* the PDR framework.
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*
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* Returns: Success: 0
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* Failure: Error code
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*/
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int audio_pdr_register(struct notifier_block *nb);
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int audio_pdr_deregister(struct notifier_block *nb);
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/*
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* Use audio_pdr_service_register to register with a PDR service
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* Function should be called after nb callback registered with
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* audio_pdr_register has been called back with the
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* AUDIO_PDR_FRAMEWORK_UP ioctl.
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*
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* domain_id - Domain to use, example: AUDIO_PDR_ADSP
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* *nb - Pointer to a notifier block. Provide a callback function
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* that will be notified of the state of the domain
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* requested. The ioctls received by the callback are
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* defined in service-notifier.h.
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*
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* Returns: Success: Client handle
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* Failure: Pointer error code
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*/
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void *audio_pdr_service_register(int domain_id,
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struct notifier_block *nb, int *curr_state);
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/*
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* Use audio_pdr_service_deregister to deregister with a PDR
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* service that was registered using the audio_pdr_service_register
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* API.
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*
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* *service_handle - Service handle returned by audio_pdr_service_register
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* *nb - Pointer to the notifier block. Used in the call to
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* audio_pdr_service_register.
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*
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* Returns: Success: Client handle
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* Failure: Error code
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*/
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int audio_pdr_service_deregister(void *service_handle,
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struct notifier_block *nb);
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#else
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static inline int audio_pdr_register(struct notifier_block *nb)
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{
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return -ENODEV;
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}
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static inline int audio_pdr_deregister(struct notifier_block *nb)
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{
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return -ENODEV;
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}
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static inline void *audio_pdr_service_register(int domain_id,
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struct notifier_block *nb,
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int *curr_state)
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{
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return NULL;
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}
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static inline int audio_pdr_service_deregister(void *service_handle,
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struct notifier_block *nb)
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{
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return 0;
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}
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#endif /* CONFIG_MSM_QDSP6_PDR */
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#endif
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