mirror of https://gitee.com/openkylin/linux.git
139 lines
3.7 KiB
C
139 lines
3.7 KiB
C
/*
|
|
* linux/sound/soc-dpcm.h -- ALSA SoC Dynamic PCM Support
|
|
*
|
|
* Author: Liam Girdwood <lrg@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef __LINUX_SND_SOC_DPCM_H
|
|
#define __LINUX_SND_SOC_DPCM_H
|
|
|
|
#include <linux/list.h>
|
|
#include <sound/pcm.h>
|
|
|
|
struct snd_soc_pcm_runtime;
|
|
|
|
/*
|
|
* Types of runtime_update to perform. e.g. originated from FE PCM ops
|
|
* or audio route changes triggered by muxes/mixers.
|
|
*/
|
|
enum snd_soc_dpcm_update {
|
|
SND_SOC_DPCM_UPDATE_NO = 0,
|
|
SND_SOC_DPCM_UPDATE_BE,
|
|
SND_SOC_DPCM_UPDATE_FE,
|
|
};
|
|
|
|
/*
|
|
* Dynamic PCM Frontend -> Backend link management states.
|
|
*/
|
|
enum snd_soc_dpcm_link_state {
|
|
SND_SOC_DPCM_LINK_STATE_NEW = 0, /* newly created link */
|
|
SND_SOC_DPCM_LINK_STATE_FREE, /* link to be dismantled */
|
|
};
|
|
|
|
/*
|
|
* Dynamic PCM Frontend -> Backend link PCM states.
|
|
*/
|
|
enum snd_soc_dpcm_state {
|
|
SND_SOC_DPCM_STATE_NEW = 0,
|
|
SND_SOC_DPCM_STATE_OPEN,
|
|
SND_SOC_DPCM_STATE_HW_PARAMS,
|
|
SND_SOC_DPCM_STATE_PREPARE,
|
|
SND_SOC_DPCM_STATE_START,
|
|
SND_SOC_DPCM_STATE_STOP,
|
|
SND_SOC_DPCM_STATE_PAUSED,
|
|
SND_SOC_DPCM_STATE_SUSPEND,
|
|
SND_SOC_DPCM_STATE_HW_FREE,
|
|
SND_SOC_DPCM_STATE_CLOSE,
|
|
};
|
|
|
|
/*
|
|
* Dynamic PCM trigger ordering. Triggering flexibility is required as some
|
|
* DSPs require triggering before/after their CPU platform and DAIs.
|
|
*
|
|
* i.e. some clients may want to manually order this call in their PCM
|
|
* trigger() whilst others will just use the regular core ordering.
|
|
*/
|
|
enum snd_soc_dpcm_trigger {
|
|
SND_SOC_DPCM_TRIGGER_PRE = 0,
|
|
SND_SOC_DPCM_TRIGGER_POST,
|
|
SND_SOC_DPCM_TRIGGER_BESPOKE,
|
|
};
|
|
|
|
/*
|
|
* Dynamic PCM link
|
|
* This links together a FE and BE DAI at runtime and stores the link
|
|
* state information and the hw_params configuration.
|
|
*/
|
|
struct snd_soc_dpcm {
|
|
/* FE and BE DAIs*/
|
|
struct snd_soc_pcm_runtime *be;
|
|
struct snd_soc_pcm_runtime *fe;
|
|
|
|
/* link state */
|
|
enum snd_soc_dpcm_link_state state;
|
|
|
|
/* list of BE and FE for this DPCM link */
|
|
struct list_head list_be;
|
|
struct list_head list_fe;
|
|
|
|
/* hw params for this link - may be different for each link */
|
|
struct snd_pcm_hw_params hw_params;
|
|
#ifdef CONFIG_DEBUG_FS
|
|
struct dentry *debugfs_state;
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Dynamic PCM runtime data.
|
|
*/
|
|
struct snd_soc_dpcm_runtime {
|
|
struct list_head be_clients;
|
|
struct list_head fe_clients;
|
|
|
|
int users;
|
|
struct snd_pcm_runtime *runtime;
|
|
struct snd_pcm_hw_params hw_params;
|
|
|
|
/* state and update */
|
|
enum snd_soc_dpcm_update runtime_update;
|
|
enum snd_soc_dpcm_state state;
|
|
};
|
|
|
|
/* can this BE stop and free */
|
|
int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
|
|
struct snd_soc_pcm_runtime *be, int stream);
|
|
|
|
/* can this BE perform a hw_params() */
|
|
int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
|
|
struct snd_soc_pcm_runtime *be, int stream);
|
|
|
|
/* is the current PCM operation for this FE ? */
|
|
int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream);
|
|
|
|
/* is the current PCM operation for this BE ? */
|
|
int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
|
|
struct snd_soc_pcm_runtime *be, int stream);
|
|
|
|
/* get the substream for this BE */
|
|
struct snd_pcm_substream *
|
|
snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream);
|
|
|
|
/* get the BE runtime state */
|
|
enum snd_soc_dpcm_state
|
|
snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream);
|
|
|
|
/* set the BE runtime state */
|
|
void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, int stream,
|
|
enum snd_soc_dpcm_state state);
|
|
|
|
/* internal use only */
|
|
int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute);
|
|
int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
|
|
int soc_dpcm_runtime_update(struct snd_soc_dapm_widget *);
|
|
|
|
#endif
|