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authorTakashi Iwai <tiwai@suse.de>2021-10-07 10:35:28 +0200
committerTakashi Iwai <tiwai@suse.de>2021-10-07 12:25:21 +0200
commit59d7f5f6ddbc23f6ca4a0523c85dc18f027c80d9 (patch)
tree576d2bd73c1d2d04add23b70a59756627145032e /sound/usb
parent36df2427ac3ea04510368561c8cee22388a7434a (diff)
downloadlinux-59d7f5f6ddbc23f6ca4a0523c85dc18f027c80d9.tar.bz2
ALSA: usb-audio: Pass JOINT_DUPLEX info flag for implicit fb streams
When a stream is in the implicit feedback mode, it's more or less tied with a capture stream. Passing SNDRV_PCM_INFO_JOINT_DUPLEX may help for user-space to understand the situation. Link: https://lore.kernel.org/r/20211007083528.4184-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/pcm.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index f09c7380a923..3bb095a3c9b6 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -1080,6 +1080,13 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
if (err < 0)
return err;
+ list_for_each_entry(fp, &subs->fmt_list, list) {
+ if (fp->implicit_fb) {
+ runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
+ break;
+ }
+ }
+
return 0;
}