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authorTakashi Iwai <tiwai@suse.de>2012-07-27 18:27:00 +0200
committerTakashi Iwai <tiwai@suse.de>2012-09-06 18:01:16 +0200
commit2d3391ec0ecca37efb6bc995906292f47522b471 (patch)
tree129e8bce7b18bb9de48d6bc0e63806d22b40ad99 /sound/core/pcm.c
parenta8d372f171db9b90a64778fbcd9237c9bc256e06 (diff)
downloadlinux-linaro-stable-2d3391ec0ecca37efb6bc995906292f47522b471.tar.gz
ALSA: PCM: channel mapping API implementation
This patch implements the basic data types for the standard channel mapping API handling. - The definitions of the channel positions and the new TLV types are added in sound/asound.h and sound/tlv.h, so that they can be referred from user-space. - Introduced a new helper function snd_pcm_add_chmap_ctls() to create control elements representing the channel maps for each PCM (sub)stream. - Some standard pre-defined channel maps are provided for convenience. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm.c')
-rw-r--r--sound/core/pcm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 1a3070b4e5b5..f2991940b271 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -1105,6 +1105,10 @@ static int snd_pcm_dev_disconnect(struct snd_device *device)
break;
}
snd_unregister_device(devtype, pcm->card, pcm->device);
+ if (pcm->streams[cidx].chmap_kctl) {
+ snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl);
+ pcm->streams[cidx].chmap_kctl = NULL;
+ }
}
unlock:
mutex_unlock(&register_mutex);