From 48d882978eb0a15547093b4542a82b5c22548041 Mon Sep 17 00:00:00 2001 From: Libin Yang Date: Wed, 31 Dec 2014 22:09:54 +0800 Subject: 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 Signed-off-by: Takashi Iwai --- include/sound/pcm.h | 1 + include/uapi/sound/asound.h | 1 + 2 files changed, 2 insertions(+) (limited to 'include') 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; -- cgit v1.2.3