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ALSA: usb-audio: ADC3: Fix channel mapping conversion for ADC3. 

The channel mapping is defined by bChRelationship, not bChPurpose.

Fixes: 9a2fe9b801 ("ALSA: usb: initial USB Audio Device Class 3.0 support")
Reviewed-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Michael Drake <michael.drake@codethink.co.uk>
Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Michael Drake 2018-04-24 18:24:43 +01:00 committed by Takashi Iwai
parent 10412c420a
commit 8e0428a7e7
1 changed files with 1 additions and 1 deletions
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2
sound/usb/stream.c
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@ -349,7 +349,7 @@ snd_pcm_chmap_elem *convert_chmap_v3(struct uac3_cluster_header_descriptor
* TODO: this conversion is not complete, update it
* after adding UAC3 values to asound.h
*/
switch (is->bChPurpose) {
switch (is->bChRelationship) {
case UAC3_CH_MONO:
map = SNDRV_CHMAP_MONO;
break;