From 8e0428a7e7a8e521540f7f87ce1c55ae04acd708 Mon Sep 17 00:00:00 2001
From: Michael Drake <michael.drake@codethink.co.uk>
Date: Tue, 24 Apr 2018 18:24:43 +0100
Subject: [PATCH] ALSA: usb-audio: ADC3: Fix channel mapping conversion for ADC3.
Git-commit: 8e0428a7e7a8e521540f7f87ce1c55ae04acd708
Patch-mainline: v4.17-rc3
References: bsc#1121278
The channel mapping is defined by bChRelationship, not bChPurpose.
Fixes: 9a2fe9b801f5 ("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>
---
sound/usb/stream.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 6a8f5843334e..956be9f7c72a 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -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;
--
2.20.1