ALSA: usb: mixer: volume quirk for CM102-A+/102S+

Currently it's not possible to set volume lower than 26% (it just mutes).

Also fixes this warning:

  Warning! Unlikely big volume range (=9472), cval->res is probably wrong.
  [13] FU [PCM Playback Volume] ch = 2, val = -9473/-1/1

, and volume works fine for full range.

Signed-off-by: Federico Cuello <fedux@fedux.com.ar>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 344d7b069d59..bb5ab7a7dfa5 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -967,6 +967,14 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
                 }
                 break;
 
+        case USB_ID(0x0d8c, 0x0103):
+                if (!strcmp(kctl->id.name, "PCM Playback Volume")) {
+                        usb_audio_info(chip,
+                                 "set volume quirk for CM102-A+/102S+\n");
+                        cval->min = -256;
+                }
+                break;
+
         case USB_ID(0x0471, 0x0101):
         case USB_ID(0x0471, 0x0104):
         case USB_ID(0x0471, 0x0105):