43bbb87652
Update file header to GPL-2.0-only. Change-Id: Ic1542a3209a5fe73c937a5b36491ede4a451936d Signed-off-by: Meng Wang <mengw@codeaurora.org>
98 baris
2.5 KiB
C
98 baris
2.5 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_NOTIFIER_H_
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#define __AUDIO_NOTIFIER_H_
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/* State of the notifier domain */
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enum {
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AUDIO_NOTIFIER_SERVICE_DOWN,
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AUDIO_NOTIFIER_SERVICE_UP
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};
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/* Service order determines connection priority
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* Highest number connected first
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*/
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enum {
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AUDIO_NOTIFIER_SSR_SERVICE,
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AUDIO_NOTIFIER_PDR_SERVICE,
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AUDIO_NOTIFIER_MAX_SERVICES
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};
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enum {
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AUDIO_NOTIFIER_ADSP_DOMAIN,
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AUDIO_NOTIFIER_MODEM_DOMAIN,
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AUDIO_NOTIFIER_MAX_DOMAINS
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};
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/* Structure populated in void *data of nb function
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* callback used for audio_notifier_register
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*/
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struct audio_notifier_cb_data {
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int service;
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int domain;
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};
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#if IS_ENABLED(CONFIG_MSM_QDSP6_NOTIFIER)
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/*
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* Use audio_notifier_register to register any audio
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* clients who need to be notified of a remote process.
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* This API will determine and register the client with
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* the best available subsystem (SSR or PDR) for that
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* domain (Adsp or Modem). When an event is sent from that
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* domain the notifier block callback function will be called.
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*
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* client_name - A unique user name defined by the client.
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* If the same name is used for multiple calls each will
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* be tracked & called back separately and a single call
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* to deregister will delete them all.
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* domain - Domain the client wants to get events from.
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* AUDIO_NOTIFIER_ADSP_DOMAIN
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* AUDIO_NOTIFIER_MODEM_DOMAIN
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* *nb - Pointer to a notifier block. Provide a callback function
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* to be notified of an even on that domain.
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*
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* nb_func(struct notifier_block *this, unsigned long opcode, void *data)
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* this - pointer to own nb
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* opcode - event from registered domain
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* AUDIO_NOTIFIER_SERVICE_DOWN
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* AUDIO_NOTIFIER_SERVICE_UP
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* *data - pointer to struct audio_notifier_cb_data
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*
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* Returns: Success: 0
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* Error: -#
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*/
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int audio_notifier_register(char *client_name, int domain,
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struct notifier_block *nb);
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/*
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* Use audio_notifier_deregister to deregister the clients from
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* all domains registered using audio_notifier_register that
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* match the client name.
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*
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* client_name - Unique user name used in audio_notifier_register.
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* Returns: Success: 0
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* Error: -#
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*/
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int audio_notifier_deregister(char *client_name);
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#else
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static inline int audio_notifier_register(char *client_name, int domain,
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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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static inline int audio_notifier_deregister(char *client_name)
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{
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return 0;
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}
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#endif /* CONFIG_MSM_QDSP6_NOTIFIER */
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#endif
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