ALSA: usb-audio: apply quirk for Huawei Technologies Co., Ltd. CM-Q3

There're several different actual hardwares sold by Huawei, using the
same USB ID 12d1:3a07.

The first one we found, having a volume control named "Headset Playback
Volume", reports a min value -15360, and will mute iff setting it to
-15360. It can be simply fixed by quirk flag MIXER_PLAYBACK_MIN_MUTE,
which we have already submitted previously.[1]

The second one we found today, having a volume control named "PCM
Playback Volume", reports its min -11520 and res 256, and will mute
when less than -11008. Because of the already existing quirk flag, we
can just set its min to -11264, and the new minimum value will still
not be available to userspace, so that userspace's minimum will be the
correct -11008.

1. https://lore.kernel.org/all/20250903-sound-v1-3-d4ca777b8512@uniontech.com/

Tested-by: Guoli An <anguoli@uniontech.com>
Signed-off-by: Cryolitia PukNgae <cryolitia.pukngae@linux.dev>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 34bcbfd8b54e66abc0229eefd354eb7bc4c01576..ae412e651faf905c9f7d600de8e19c51995cd3f9 100644 (file)
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1189,6 +1189,13 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
                        cval->min = -14208; /* Mute under it */
                }
                break;
+       case USB_ID(0x12d1, 0x3a07): /* Huawei Technologies Co., Ltd. CM-Q3 */
+               if (!strcmp(kctl->id.name, "PCM Playback Volume")) {
+                       usb_audio_info(chip,
+                                      "set volume quirk for Huawei Technologies Co., Ltd. CM-Q3\n");
+                       cval->min = -11264; /* Mute under it */
+               }
+               break;
        }
 }