diff options
| author | Libin Yang <libin.yang@intel.com> | 2014-12-31 22:09:54 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-12-31 17:10:08 +0100 |
| commit | 48d882978eb0a15547093b4542a82b5c22548041 (patch) | |
| tree | 814d122dc9b7d6076ecb49229ba27b3bd94d3401 /include | |
| parent | 0d02e1292715d00674a49626146e3a854b504cb1 (diff) | |
| download | linux-48d882978eb0a15547093b4542a82b5c22548041.tar.bz2 | |
ALSA: pcm: add SNDRV_PCM_TRIGGER_DRAIN trigger
Add SNDRV_PCM_TRIGGER_DRAIN trigger for pcm drain.
Some audio devices require notification of drain events
in order to properly drain and shutdown an audio stream.
Signed-off-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/pcm.h | 1 | ||||
| -rw-r--r-- | include/uapi/sound/asound.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 3652c9439af9..bf32cea2202e 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -106,6 +106,7 @@ struct snd_pcm_ops { #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 #define SNDRV_PCM_TRIGGER_SUSPEND 5 #define SNDRV_PCM_TRIGGER_RESUME 6 +#define SNDRV_PCM_TRIGGER_DRAIN 7 #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h index 1f23cd635957..0e88e7a0f0eb 100644 --- a/include/uapi/sound/asound.h +++ b/include/uapi/sound/asound.h @@ -268,6 +268,7 @@ typedef int __bitwise snd_pcm_subformat_t; #define SNDRV_PCM_INFO_SYNC_START 0x00400000 /* pcm support some kind of sync go */ #define SNDRV_PCM_INFO_NO_PERIOD_WAKEUP 0x00800000 /* period wakeup can be disabled */ #define SNDRV_PCM_INFO_HAS_WALL_CLOCK 0x01000000 /* has audio wall clock for audio/system time sync */ +#define SNDRV_PCM_INFO_DRAIN_TRIGGER 0x40000000 /* internal kernel flag - trigger in drain */ #define SNDRV_PCM_INFO_FIFO_IN_FRAMES 0x80000000 /* internal kernel flag - FIFO size is in frames */ typedef int __bitwise snd_pcm_state_t; |