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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>
This commit is contained in:
Takashi Iwai 2021-10-07 10:35:28 +02:00
parent 36df2427ac
commit 59d7f5f6dd
1 changed files with 7 additions and 0 deletions
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7
sound/usb/pcm.c
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@ -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;
}