11323a0833
This patch parallelizes FE (front end) and BE (back end) when playback/capture path is set up. FE's and BE's which can be parallelized should be indicated in corresponding machine file. All the operations can be started asynchronously provided the usecase supports asynchronous operation. Parallelizing reduces the startup latency as both FE and BE operations run in parallel. Change-Id: I17e7e1c3d406713cc728ec262cfe388f7251f7de Signed-off-by: Walter Yang <yandongy@codeaurora.org> Signed-off-by: Fred Oh <fred@codeaurora.org> Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org> Signed-off-by: Meng Wang <mwang@codeaurora.org>
166 lines
4.9 KiB
C
166 lines
4.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* linux/sound/soc-dpcm.h -- ALSA SoC Dynamic PCM Support
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*
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* Author: Liam Girdwood <lrg@ti.com>
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*/
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#ifndef __LINUX_SND_SOC_DPCM_H
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#define __LINUX_SND_SOC_DPCM_H
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <sound/pcm.h>
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struct snd_soc_pcm_runtime;
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#define DPCM_MAX_BE_USERS 8
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/*
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* Types of runtime_update to perform. e.g. originated from FE PCM ops
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* or audio route changes triggered by muxes/mixers.
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*/
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enum snd_soc_dpcm_update {
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SND_SOC_DPCM_UPDATE_NO = 0,
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SND_SOC_DPCM_UPDATE_BE,
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SND_SOC_DPCM_UPDATE_FE,
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};
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/*
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* Dynamic PCM Frontend -> Backend link management states.
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*/
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enum snd_soc_dpcm_link_state {
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SND_SOC_DPCM_LINK_STATE_NEW = 0, /* newly created link */
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SND_SOC_DPCM_LINK_STATE_FREE, /* link to be dismantled */
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};
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/*
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* Dynamic PCM Frontend -> Backend link PCM states.
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*/
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enum snd_soc_dpcm_state {
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SND_SOC_DPCM_STATE_NEW = 0,
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SND_SOC_DPCM_STATE_OPEN,
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SND_SOC_DPCM_STATE_HW_PARAMS,
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SND_SOC_DPCM_STATE_PREPARE,
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SND_SOC_DPCM_STATE_START,
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SND_SOC_DPCM_STATE_STOP,
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SND_SOC_DPCM_STATE_PAUSED,
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SND_SOC_DPCM_STATE_SUSPEND,
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SND_SOC_DPCM_STATE_HW_FREE,
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SND_SOC_DPCM_STATE_CLOSE,
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};
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/*
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* Dynamic PCM trigger ordering. Triggering flexibility is required as some
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* DSPs require triggering before/after their CPU platform and DAIs.
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*
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* i.e. some clients may want to manually order this call in their PCM
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* trigger() whilst others will just use the regular core ordering.
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*/
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enum snd_soc_dpcm_trigger {
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SND_SOC_DPCM_TRIGGER_PRE = 0,
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SND_SOC_DPCM_TRIGGER_POST,
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SND_SOC_DPCM_TRIGGER_BESPOKE,
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};
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/*
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* Dynamic PCM link
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* This links together a FE and BE DAI at runtime and stores the link
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* state information and the hw_params configuration.
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*/
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struct snd_soc_dpcm {
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/* FE and BE DAIs*/
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struct snd_soc_pcm_runtime *be;
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struct snd_soc_pcm_runtime *fe;
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/* link state */
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enum snd_soc_dpcm_link_state state;
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/* list of BE and FE for this DPCM link */
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struct list_head list_be;
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struct list_head list_fe;
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/* hw params for this link - may be different for each link */
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struct snd_pcm_hw_params hw_params;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_state;
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#endif
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int stream;
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};
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/*
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* Dynamic PCM runtime data.
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*/
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struct snd_soc_dpcm_runtime {
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struct list_head be_clients;
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struct list_head fe_clients;
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int users;
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struct snd_pcm_runtime *runtime;
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struct snd_pcm_hw_params hw_params;
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/* state and update */
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enum snd_soc_dpcm_update runtime_update;
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enum snd_soc_dpcm_state state;
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int trigger_pending; /* trigger cmd + 1 if pending, 0 if not */
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};
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/* can this BE stop and free */
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int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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/* can this BE perform a hw_params() */
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int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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/* is the current PCM operation for this FE ? */
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int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream);
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/* is the current PCM operation for this BE ? */
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int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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/* get the substream for this BE */
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struct snd_pcm_substream *
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snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream);
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/* get the BE runtime state */
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enum snd_soc_dpcm_state
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snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream);
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/* set the BE runtime state */
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void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, int stream,
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enum snd_soc_dpcm_state state);
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/* internal use only */
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int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute);
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void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
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int soc_dpcm_runtime_update(struct snd_soc_card *);
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int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
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int stream, struct snd_soc_dapm_widget_list **list_);
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int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
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int stream, struct snd_soc_dapm_widget_list **list, int new);
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int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream);
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int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream);
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void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream);
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void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream);
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int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream);
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int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int tream);
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int dpcm_fe_dai_hw_params_be(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, struct snd_pcm_hw_params *hw_params,
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int stream);
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int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, int cmd);
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int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream);
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int dpcm_fe_dai_prepare_be(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
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int event);
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static inline void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
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{
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kfree(*list);
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}
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#endif
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