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8#ifndef __LINUX_SND_SOC_DPCM_H
9#define __LINUX_SND_SOC_DPCM_H
10
11#include <linux/slab.h>
12#include <linux/list.h>
13#include <sound/pcm.h>
14
15struct snd_soc_pcm_runtime;
16
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19
20
21enum snd_soc_dpcm_update {
22 SND_SOC_DPCM_UPDATE_NO = 0,
23 SND_SOC_DPCM_UPDATE_BE,
24 SND_SOC_DPCM_UPDATE_FE,
25};
26
27
28
29
30enum snd_soc_dpcm_link_state {
31 SND_SOC_DPCM_LINK_STATE_NEW = 0,
32 SND_SOC_DPCM_LINK_STATE_FREE,
33};
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36
37
38enum snd_soc_dpcm_state {
39 SND_SOC_DPCM_STATE_NEW = 0,
40 SND_SOC_DPCM_STATE_OPEN,
41 SND_SOC_DPCM_STATE_HW_PARAMS,
42 SND_SOC_DPCM_STATE_PREPARE,
43 SND_SOC_DPCM_STATE_START,
44 SND_SOC_DPCM_STATE_STOP,
45 SND_SOC_DPCM_STATE_PAUSED,
46 SND_SOC_DPCM_STATE_SUSPEND,
47 SND_SOC_DPCM_STATE_HW_FREE,
48 SND_SOC_DPCM_STATE_CLOSE,
49};
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57
58enum snd_soc_dpcm_trigger {
59 SND_SOC_DPCM_TRIGGER_PRE = 0,
60 SND_SOC_DPCM_TRIGGER_POST,
61 SND_SOC_DPCM_TRIGGER_BESPOKE,
62};
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68
69struct snd_soc_dpcm {
70
71 struct snd_soc_pcm_runtime *be;
72 struct snd_soc_pcm_runtime *fe;
73
74
75 enum snd_soc_dpcm_link_state state;
76
77
78 struct list_head list_be;
79 struct list_head list_fe;
80
81
82 struct snd_pcm_hw_params hw_params;
83#ifdef CONFIG_DEBUG_FS
84 struct dentry *debugfs_state;
85#endif
86};
87
88
89
90
91struct snd_soc_dpcm_runtime {
92 struct list_head be_clients;
93 struct list_head fe_clients;
94
95 int users;
96 struct snd_pcm_runtime *runtime;
97 struct snd_pcm_hw_params hw_params;
98
99
100 enum snd_soc_dpcm_update runtime_update;
101 enum snd_soc_dpcm_state state;
102
103 int trigger_pending;
104};
105
106#define for_each_dpcm_fe(be, stream, _dpcm) \
107 list_for_each_entry(_dpcm, &(be)->dpcm[stream].fe_clients, list_fe)
108
109#define for_each_dpcm_be(fe, stream, _dpcm) \
110 list_for_each_entry(_dpcm, &(fe)->dpcm[stream].be_clients, list_be)
111#define for_each_dpcm_be_safe(fe, stream, _dpcm, __dpcm) \
112 list_for_each_entry_safe(_dpcm, __dpcm, &(fe)->dpcm[stream].be_clients, list_be)
113#define for_each_dpcm_be_rollback(fe, stream, _dpcm) \
114 list_for_each_entry_continue_reverse(_dpcm, &(fe)->dpcm[stream].be_clients, list_be)
115
116
117int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
118 struct snd_soc_pcm_runtime *be, int stream);
119
120
121int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
122 struct snd_soc_pcm_runtime *be, int stream);
123
124
125int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream);
126
127
128int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
129 struct snd_soc_pcm_runtime *be, int stream);
130
131
132struct snd_pcm_substream *
133 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream);
134
135
136int snd_soc_dpcm_runtime_update(struct snd_soc_card *card);
137
138#ifdef CONFIG_DEBUG_FS
139void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
140#else
141static inline void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
142{
143}
144#endif
145
146int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
147 int stream, struct snd_soc_dapm_widget_list **list_);
148void dpcm_path_put(struct snd_soc_dapm_widget_list **list);
149int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
150 int stream, struct snd_soc_dapm_widget_list **list, int new);
151int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream);
152void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
153 int do_hw_free, struct snd_soc_dpcm *last);
154void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream);
155void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream);
156void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream);
157int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int tream);
158int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, int cmd);
159int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream);
160int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
161 int event);
162
163#define dpcm_be_dai_startup_rollback(fe, stream, last) \
164 dpcm_be_dai_stop(fe, stream, 0, last)
165#define dpcm_be_dai_startup_unwind(fe, stream) dpcm_be_dai_stop(fe, stream, 0, NULL)
166#define dpcm_be_dai_shutdown(fe, stream) dpcm_be_dai_stop(fe, stream, 1, NULL)
167
168#endif
169