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162 lines
4.9 KiB
162 lines
4.9 KiB
/* 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 <[email protected]> |
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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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/* |
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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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}; |
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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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#define for_each_dpcm_fe(be, stream, _dpcm) \ |
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list_for_each_entry(_dpcm, &(be)->dpcm[stream].fe_clients, list_fe) |
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#define for_each_dpcm_be(fe, stream, _dpcm) \ |
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list_for_each_entry(_dpcm, &(fe)->dpcm[stream].be_clients, list_be) |
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#define for_each_dpcm_be_safe(fe, stream, _dpcm, __dpcm) \ |
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list_for_each_entry_safe(_dpcm, __dpcm, &(fe)->dpcm[stream].be_clients, list_be) |
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#define for_each_dpcm_be_rollback(fe, stream, _dpcm) \ |
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list_for_each_entry_continue_reverse(_dpcm, &(fe)->dpcm[stream].be_clients, list_be) |
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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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/* update audio routing between PCMs and any DAI links */ |
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int snd_soc_dpcm_runtime_update(struct snd_soc_card *card); |
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#ifdef CONFIG_DEBUG_FS |
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void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd); |
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#else |
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static inline void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) |
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{ |
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} |
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#endif |
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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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void dpcm_path_put(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_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_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, |
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int event); |
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#endif
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