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, | |
63 | }; | |
64 | ||
65 | /* | |
66 | * Dynamic PCM link | |
67 | * This links together a FE and BE DAI at runtime and stores the link | |
68 | * state information and the hw_params configuration. | |
69 | */ | |
70 | struct snd_soc_dpcm { | |
71 | /* FE and BE DAIs*/ | |
72 | struct snd_soc_pcm_runtime *be; | |
73 | struct snd_soc_pcm_runtime *fe; | |
74 | ||
75 | /* link state */ | |
76 | enum snd_soc_dpcm_link_state state; | |
77 | ||
78 | /* list of BE and FE for this DPCM link */ | |
79 | struct list_head list_be; | |
80 | struct list_head list_fe; | |
81 | ||
82 | /* hw params for this link - may be different for each link */ | |
83 | struct snd_pcm_hw_params hw_params; | |
f86dcef8 LG |
84 | #ifdef CONFIG_DEBUG_FS |
85 | struct dentry *debugfs_state; | |
86 | #endif | |
01d7584c LG |
87 | }; |
88 | ||
89 | /* | |
90 | * Dynamic PCM runtime data. | |
91 | */ | |
92 | struct snd_soc_dpcm_runtime { | |
93 | struct list_head be_clients; | |
94 | struct list_head fe_clients; | |
95 | ||
96 | int users; | |
97 | struct snd_pcm_runtime *runtime; | |
98 | struct snd_pcm_hw_params hw_params; | |
99 | ||
100 | /* state and update */ | |
101 | enum snd_soc_dpcm_update runtime_update; | |
102 | enum snd_soc_dpcm_state state; | |
103 | }; | |
104 | ||
105 | /* can this BE stop and free */ | |
106 | int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, | |
107 | struct snd_soc_pcm_runtime *be, int stream); | |
108 | ||
109 | /* can this BE perform a hw_params() */ | |
110 | int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, | |
111 | struct snd_soc_pcm_runtime *be, int stream); | |
112 | ||
113 | /* is the current PCM operation for this FE ? */ | |
114 | int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream); | |
115 | ||
116 | /* is the current PCM operation for this BE ? */ | |
117 | int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, | |
118 | struct snd_soc_pcm_runtime *be, int stream); | |
119 | ||
120 | /* get the substream for this BE */ | |
121 | struct snd_pcm_substream * | |
122 | snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream); | |
123 | ||
124 | /* get the BE runtime state */ | |
125 | enum snd_soc_dpcm_state | |
126 | snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream); | |
127 | ||
128 | /* set the BE runtime state */ | |
129 | void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, int stream, | |
130 | enum snd_soc_dpcm_state state); | |
131 | ||
132 | /* internal use only */ | |
133 | int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute); | |
f86dcef8 | 134 | int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd); |
01d7584c LG |
135 | |
136 | #endif |