[PATCH] ALSA: usb-audio: apply quirk for MOONDROP JU Jiu

[Cryolitia PukNgae <cryolitia.pukngae@linux.dev>]

It(ID 31b2:0111 JU Jiu) reports a MIN value -12800 for volume control, but
will mute when setting it less than -10880.

Thanks to my girlfriend Kagura for reporting this issue.

Cc: Kagura <me@mail.kagurach.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Cryolitia PukNgae <cryolitia.pukngae@linux.dev>
---
Btw, is it a good idea for turn the volume_control_quirks from
switch-case to a table and sort it accroding to USB VID&PID?
---
 sound/usb/mixer.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 69026cf54979..a25e8145af67 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1204,6 +1204,13 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
 			cval->min = -11264; /* Mute under it */
 		}
 		break;
+	case USB_ID(0x31b2, 0x0111): /* MOONDROP JU Jiu */
+		if (!strcmp(kctl->id.name, "PCM Playback Volume")) {
+			usb_audio_info(chip,
+				       "set volume quirk for MOONDROP JU Jiu\n");
+			cval->min = -10880; /* Mute under it */
+		}
+		break;
 	}
 }
 

---
base-commit: 872c7433582a3570dd0c827967ba291450096bf0
change-id: 20260402-syy-f04074ca6782

Best regards,
--  
Cryolitia PukNgae <cryolitia.pukngae@linux.dev>