linux/sound/soc/qcom/sdw.c

// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018-2023, Linaro Limited.
// Copyright (c) 2018, The Linux Foundation. All rights reserved.

#include <dt-bindings/sound/qcom,q6afe.h>
#include <linux/module.h>
#include <sound/soc.h>
#include "sdw.h"

/**
 * qcom_snd_sdw_startup() - Helper to start Soundwire stream for SoC audio card
 * @substream: The PCM substream from audio, as passed to snd_soc_ops->startup()
 *
 * Helper for the SoC audio card (snd_soc_ops->startup()) to allocate and set
 * Soundwire stream runtime to each codec DAI.
 *
 * The shutdown() callback should call sdw_release_stream() on the same
 * sdw_stream_runtime.
 *
 * Return: 0 or errno
 */
int qcom_snd_sdw_startup(struct snd_pcm_substream *substream)
{ … }
EXPORT_SYMBOL_GPL(…);

int qcom_snd_sdw_prepare(struct snd_pcm_substream *substream,
			 struct sdw_stream_runtime *sruntime,
			 bool *stream_prepared)
{ … }
EXPORT_SYMBOL_GPL(…);

int qcom_snd_sdw_hw_params(struct snd_pcm_substream *substream,
			   struct snd_pcm_hw_params *params,
			   struct sdw_stream_runtime **psruntime)
{ … }
EXPORT_SYMBOL_GPL(…);

int qcom_snd_sdw_hw_free(struct snd_pcm_substream *substream,
			 struct sdw_stream_runtime *sruntime, bool *stream_prepared)
{ … }
EXPORT_SYMBOL_GPL(…);
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;