[PATCH 4.14 08/17] ALSA: usb-audio: Add mute TLV for playback volumes on RODE NT-USB

Greg Kroah-Hartman
2022-03-25T15:06:55Z

From: Lars-Peter Clausen <lars@metafoo.de>

commit 0f306cca42fe879694fb5e2382748c43dc9e0196 upstream.

For the RODE NT-USB the lowest Playback mixer volume setting mutes the
audio output. But it is not reported as such causing e.g. PulseAudio to
accidentally mute the device when selecting a low volume.

Fix this by applying the existing quirk for this kind of issue when the
device is detected.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220311201400.235892-1-lars@metafoo.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/usb/mixer_quirks.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -1884,9 +1884,10 @@ void snd_usb_mixer_fu_apply_quirk(struct
if (unitid == 7 && cval->control == UAC_FU_VOLUME)
snd_dragonfly_quirk_db_scale(mixer, cval, kctl);
break;
- /* lowest playback value is muted on C-Media devices */
- case USB_ID(0x0d8c, 0x000c):
- case USB_ID(0x0d8c, 0x0014):
+ /* lowest playback value is muted on some devices */
+ case USB_ID(0x0d8c, 0x000c): /* C-Media */
+ case USB_ID(0x0d8c, 0x0014): /* C-Media */
+ case USB_ID(0x19f7, 0x0003): /* RODE NT-USB */
if (strstr(kctl->id.name, "Playback"))
cval->min_mute = 1;
break;