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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 |