projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 01d7584c LG |
1 | /* |
| 2 | * linux/sound/soc-dpcm.h -- ALSA SoC Dynamic PCM Support | |
| 3 | * | |
| 4 | * Author: Liam Girdwood <lrg@ti.com> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef __LINUX_SND_SOC_DPCM_H | |
| 12 | #define __LINUX_SND_SOC_DPCM_H | |
| 13 | ||
| 14 | #include <linux/list.h> | |
| 15 | #include <sound/pcm.h> | |
| 16 | ||
| 17 | struct snd_soc_pcm_runtime; | |
| 18 | ||
| 19 | /* | |
| 20 | * Types of runtime_update to perform. e.g. originated from FE PCM ops | |
| 21 | * or audio route changes triggered by muxes/mixers. | |
| 22 | */ | |
| 23 | enum snd_soc_dpcm_update { | |
| 24 | SND_SOC_DPCM_UPDATE_NO = 0, | |
| 25 | SND_SOC_DPCM_UPDATE_BE, | |
| 26 | SND_SOC_DPCM_UPDATE_FE, | |
| 27 | }; | |
| 28 | ||
| 29 | /* | |
| 30 | * Dynamic PCM Frontend -> Backend link management states. | |
| 31 | */ | |
| 32 | enum snd_soc_dpcm_link_state { | |
| 33 | SND_SOC_DPCM_LINK_STATE_NEW = 0, /* newly created link */ | |
| 34 | SND_SOC_DPCM_LINK_STATE_FREE, /* link to be dismantled */ | |
| 35 | }; | |
| 36 | ||
| 37 | /* | |
| 38 | * Dynamic PCM Frontend -> Backend link PCM states. | |
| 39 | */ | |
| 40 | enum snd_soc_dpcm_state { | |
| 41 | SND_SOC_DPCM_STATE_NEW = 0, | |
| 42 | SND_SOC_DPCM_STATE_OPEN, | |
| 43 | SND_SOC_DPCM_STATE_HW_PARAMS, | |
| 44 | SND_SOC_DPCM_STATE_PREPARE, | |
| 45 | SND_SOC_DPCM_STATE_START, | |
| 46 | SND_SOC_DPCM_STATE_STOP, | |
| 47 | SND_SOC_DPCM_STATE_PAUSED, | |
| 48 | SND_SOC_DPCM_STATE_SUSPEND, | |
| 49 | SND_SOC_DPCM_STATE_HW_FREE, | |
| 50 | SND_SOC_DPCM_STATE_CLOSE, | |
| 51 | }; | |
| 52 | ||
| 53 | /* | |
| 54 | * Dynamic PCM trigger ordering. Triggering flexibility is required as some | |
| 55 | * DSPs require triggering before/after their CPU platform and DAIs. | |
| 56 | * | |
| 57 | * i.e. some clients may want to manually order this call in their PCM | |
| 58 | * trigger() whilst others will just use the regular core ordering. | |
| 59 | */ | |
| 60 | enum snd_soc_dpcm_trigger { | |
| 61 | SND_SOC_DPCM_TRIGGER_PRE = 0, | |
| 62 | SND_SOC_DPCM_TRIGGER_POST, | |
| 07bf84aa | 63 | SND_SOC_DPCM_TRIGGER_BESPOKE, |
| 01d7584c LG |
64 | }; |
| 65 | ||
| 66 | /* | |
| 67 | * Dynamic PCM link | |
| 68 | * This links together a FE and BE DAI at runtime and stores the link | |
| 69 | * state information and the hw_params configuration. | |
| 70 | */ | |
| 71 | struct snd_soc_dpcm { | |
| 72 | /* FE and BE DAIs*/ | |
| 73 | struct snd_soc_pcm_runtime *be; | |
| 74 | struct snd_soc_pcm_runtime *fe; | |
| 75 | ||
| 76 | /* link state */ | |
| 77 | enum snd_soc_dpcm_link_state state; | |
| 78 | ||
| 79 | /* list of BE and FE for this DPCM link */ | |
| 80 | struct list_head list_be; | |
| 81 | struct list_head list_fe; | |
| 82 | ||
| 83 | /* hw params for this link - may be different for each link */ | |
| 84 | struct snd_pcm_hw_params hw_params; | |
| f86dcef8 LG |
85 | #ifdef CONFIG_DEBUG_FS |
| 86 | struct dentry *debugfs_state; | |
| 87 | #endif | |
| 01d7584c LG |
88 | }; |
| 89 | ||
| 90 | /* | |
| 91 | * Dynamic PCM runtime data. | |
| 92 | */ | |
| 93 | struct snd_soc_dpcm_runtime { | |
| 94 | struct list_head be_clients; | |
| 95 | struct list_head fe_clients; | |
| 96 | ||
| 97 | int users; | |
| 98 | struct snd_pcm_runtime *runtime; | |
| 99 | struct snd_pcm_hw_params hw_params; | |
| 100 | ||
| 101 | /* state and update */ | |
| 102 | enum snd_soc_dpcm_update runtime_update; | |
| 103 | enum snd_soc_dpcm_state state; | |
| 104 | }; | |
| 105 | ||
| 106 | /* can this BE stop and free */ | |
| 107 | int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, | |
| 108 | struct snd_soc_pcm_runtime *be, int stream); | |
| 109 | ||
| 110 | /* can this BE perform a hw_params() */ | |
| 111 | int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, | |
| 112 | struct snd_soc_pcm_runtime *be, int stream); | |
| 113 | ||
| 114 | /* is the current PCM operation for this FE ? */ | |
| 115 | int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream); | |
| 116 | ||
| 117 | /* is the current PCM operation for this BE ? */ | |
| 118 | int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, | |
| 119 | struct snd_soc_pcm_runtime *be, int stream); | |
| 120 | ||
| 121 | /* get the substream for this BE */ | |
| 122 | struct snd_pcm_substream * | |
| 123 | snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream); | |
| 124 | ||
| 125 | /* get the BE runtime state */ | |
| 126 | enum snd_soc_dpcm_state | |
| 127 | snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream); | |
| 128 | ||
| 129 | /* set the BE runtime state */ | |
| 130 | void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, int stream, | |
| 131 | enum snd_soc_dpcm_state state); | |
| 132 | ||
| 133 | /* internal use only */ | |
| 134 | int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute); | |
| f86dcef8 | 135 | int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd); |
| 618dae11 | 136 | int soc_dpcm_runtime_update(struct snd_soc_dapm_widget *); |
| 01d7584c LG |
137 | |
| 138 | #endif |