* [PATCH] ALSA: usb-audio: Pass JOINT_DUPLEX info flag for implicit fb streams
@ 2021-10-07 8:35 Takashi Iwai
0 siblings, 0 replies; only message in thread
From: Takashi Iwai @ 2021-10-07 8:35 UTC (permalink / raw)
To: alsa-devel
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.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/usb/pcm.c | 7 +++++++
1 file changed, 7 insertions(+)
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;
}
--
2.31.1
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2021-10-07 8:35 [PATCH] ALSA: usb-audio: Pass JOINT_DUPLEX info flag for implicit fb streams Takashi Iwai
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