linux/sound/soc/sof/pcm.c

// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license.  When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation
//
// Author: Liam Girdwood <[email protected]>
//
// PCM Layer, interface between ALSA and IPC.
//

#include <linux/pm_runtime.h>
#include <sound/pcm_params.h>
#include <sound/sof.h>
#include <trace/events/sof.h>
#include "sof-of-dev.h"
#include "sof-priv.h"
#include "sof-audio.h"
#include "sof-utils.h"
#include "ops.h"

/* Create DMA buffer page table for DSP */
static int create_page_table(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream,
			     unsigned char *dma_area, size_t size)
{ … }

/*
 * sof pcm period elapse work
 */
static void snd_sof_pcm_period_elapsed_work(struct work_struct *work)
{ … }

void snd_sof_pcm_init_elapsed_work(struct work_struct *work)
{ … }

/*
 * sof pcm period elapse, this could be called at irq thread context.
 */
void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream)
{ … }
EXPORT_SYMBOL(…);

static int
sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, struct snd_soc_pcm_runtime *rtd,
				struct snd_sof_pcm *spcm, struct snd_pcm_hw_params *params,
				struct snd_sof_platform_stream_params *platform_params, int dir)
{ … }

static int sof_pcm_hw_params(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params)
{ … }

static int sof_pcm_hw_free(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream)
{ … }

static int sof_pcm_prepare(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream)
{ … }

/*
 * FE dai link trigger actions are always executed in non-atomic context because
 * they involve IPC's.
 */
static int sof_pcm_trigger(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream, int cmd)
{ … }

static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component,
					 struct snd_pcm_substream *substream)
{ … }

static int sof_pcm_open(struct snd_soc_component *component,
			struct snd_pcm_substream *substream)
{ … }

static int sof_pcm_close(struct snd_soc_component *component,
			 struct snd_pcm_substream *substream)
{ … }

/*
 * Pre-allocate playback/capture audio buffer pages.
 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free
 * snd_pcm_lib_preallocate_free_for_all() is called by the core.
 */
static int sof_pcm_new(struct snd_soc_component *component,
		       struct snd_soc_pcm_runtime *rtd)
{ … }

/* fixup the BE DAI link to match any values from topology */
int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params)
{ … }
EXPORT_SYMBOL(…);

static int sof_pcm_probe(struct snd_soc_component *component)
{ … }

static void sof_pcm_remove(struct snd_soc_component *component)
{ … }

static int sof_pcm_ack(struct snd_soc_component *component,
		       struct snd_pcm_substream *substream)
{ … }

static snd_pcm_sframes_t sof_pcm_delay(struct snd_soc_component *component,
				       struct snd_pcm_substream *substream)
{ … }

void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
{ … }