Commit 59d7f5f6 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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: default avatarTakashi Iwai <tiwai@suse.de>
parent 36df2427

sound/usb/pcm.c

+7 −0
Original line number Diff line number Diff line
@@ -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;

}