linux/sound/soc/intel/atom/sst/sst_stream.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  sst_stream.c - Intel SST Driver for audio engine
 *
 *  Copyright (C) 2008-14 Intel Corp
 *  Authors:	Vinod Koul <[email protected]>
 *		Harsha Priya <[email protected]>
 *		Dharageswari R <[email protected]>
 *		KP Jeeja <[email protected]>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#include <linux/pci.h>
#include <linux/firmware.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/compress_driver.h>
#include <asm/platform_sst_audio.h>
#include "../sst-mfld-platform.h"
#include "sst.h"

int sst_alloc_stream_mrfld(struct intel_sst_drv *sst_drv_ctx, void *params)
{ … }

/**
 * sst_realloc_stream - Send msg for (re-)allocating a stream using the
 * @sst_drv_ctx: intel_sst_drv context pointer
 * @str_id: stream ID
 *
 * Send a msg for (re-)allocating a stream using the parameters previously
 * passed to sst_alloc_stream_mrfld() for the same stream ID.
 * Return: 0 or negative errno value.
 */
int sst_realloc_stream(struct intel_sst_drv *sst_drv_ctx, int str_id)
{ … }

/**
 * sst_start_stream - Send msg for a starting stream
 * @sst_drv_ctx: intel_sst_drv context pointer
 * @str_id: stream ID
 *
 * This function is called by any function which wants to start
 * a stream.
 */
int sst_start_stream(struct intel_sst_drv *sst_drv_ctx, int str_id)
{ … }

int sst_send_byte_stream_mrfld(struct intel_sst_drv *sst_drv_ctx,
		struct snd_sst_bytes_v2 *bytes)
{ … }

/**
 * sst_pause_stream - Send msg for a pausing stream
 * @sst_drv_ctx: intel_sst_drv context pointer
 * @str_id: stream ID
 *
 * This function is called by any function which wants to pause
 * an already running stream.
 */
int sst_pause_stream(struct intel_sst_drv *sst_drv_ctx, int str_id)
{ … }

/**
 * sst_resume_stream - Send msg for resuming stream
 * @sst_drv_ctx: intel_sst_drv context pointer
 * @str_id: stream ID
 *
 * This function is called by any function which wants to resume
 * an already paused stream.
 */
int sst_resume_stream(struct intel_sst_drv *sst_drv_ctx, int str_id)
{ … }


/**
 * sst_drop_stream - Send msg for stopping stream
 * @sst_drv_ctx: intel_sst_drv context pointer
 * @str_id: stream ID
 *
 * This function is called by any function which wants to stop
 * a stream.
 */
int sst_drop_stream(struct intel_sst_drv *sst_drv_ctx, int str_id)
{ … }

/**
 * sst_drain_stream - Send msg for draining stream
 * @sst_drv_ctx: intel_sst_drv context pointer
 * @str_id: stream ID
 * @partial_drain: boolean indicating if a gapless transition is taking place
 *
 * This function is called by any function which wants to drain
 * a stream.
 */
int sst_drain_stream(struct intel_sst_drv *sst_drv_ctx,
			int str_id, bool partial_drain)
{ … }

/**
 * sst_free_stream - Frees a stream
 * @sst_drv_ctx: intel_sst_drv context pointer
 * @str_id: stream ID
 *
 * This function is called by any function which wants to free
 * a stream.
 */
int sst_free_stream(struct intel_sst_drv *sst_drv_ctx, int str_id)
{ … }