diff options
Diffstat (limited to 'include/sound/soc-dpcm.h')
| -rw-r--r-- | include/sound/soc-dpcm.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/include/sound/soc-dpcm.h b/include/sound/soc-dpcm.h new file mode 100644 index 000000000..bd8795198 --- /dev/null +++ b/include/sound/soc-dpcm.h @@ -0,0 +1,166 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * linux/sound/soc-dpcm.h -- ALSA SoC Dynamic PCM Support + * + * Author: Liam Girdwood <lrg@ti.com> + */ + +#ifndef __LINUX_SND_SOC_DPCM_H +#define __LINUX_SND_SOC_DPCM_H + +#include <linux/slab.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; + + int trigger_pending; /* trigger cmd + 1 if pending, 0 if not */ +}; + +#define for_each_dpcm_fe(be, stream, _dpcm) \ + list_for_each_entry(_dpcm, &(be)->dpcm[stream].fe_clients, list_fe) + +#define for_each_dpcm_be(fe, stream, _dpcm) \ + list_for_each_entry(_dpcm, &(fe)->dpcm[stream].be_clients, list_be) +#define for_each_dpcm_be_safe(fe, stream, _dpcm, __dpcm) \ + list_for_each_entry_safe(_dpcm, __dpcm, &(fe)->dpcm[stream].be_clients, list_be) +#define for_each_dpcm_be_rollback(fe, stream, _dpcm) \ + list_for_each_entry_continue_reverse(_dpcm, &(fe)->dpcm[stream].be_clients, list_be) + +/* 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); + +/* can this BE perform prepare */ +int snd_soc_dpcm_can_be_prepared(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); + +/* update audio routing between PCMs and any DAI links */ +int snd_soc_dpcm_runtime_update(struct snd_soc_card *card); + +#ifdef CONFIG_DEBUG_FS +void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd); +#else +static inline void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) +{ +} +#endif + +int dpcm_path_get(struct snd_soc_pcm_runtime *fe, + int stream, struct snd_soc_dapm_widget_list **list_); +void dpcm_path_put(struct snd_soc_dapm_widget_list **list); +int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, + int stream, struct snd_soc_dapm_widget_list **list, int new); +int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream); +int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream); +void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream); +void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream); +int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream); +int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int tream); +int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, int cmd); +int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream); +int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, + int event); + +#endif |