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authorLibin Yang <libin.yang@intel.com>2014-12-31 22:09:54 +0800
committerTakashi Iwai <tiwai@suse.de>2014-12-31 17:10:08 +0100
commit48d882978eb0a15547093b4542a82b5c22548041 (patch)
tree814d122dc9b7d6076ecb49229ba27b3bd94d3401 /sound/core
parent0d02e1292715d00674a49626146e3a854b504cb1 (diff)
downloadlinux-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 'sound/core')
-rw-r--r--sound/core/pcm_native.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 095d9572ad2b..ff3abc3b4ff5 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -420,7 +420,8 @@ int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
hw = &substream->runtime->hw;
if (!params->info) {
- params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
+ params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
+ SNDRV_PCM_INFO_DRAIN_TRIGGER);
if (!hw_support_mmap(substream))
params->info &= ~(SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID);
@@ -1566,6 +1567,13 @@ static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
snd_pcm_post_stop(substream, new_state);
}
}
+
+ if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
+ runtime->trigger_master == substream &&
+ (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
+ return substream->ops->trigger(substream,
+ SNDRV_PCM_TRIGGER_DRAIN);
+
return 0;
}