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

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commit 21493316a3c4598f308d5a9fa31cc74639c4caff upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Federico Cuello 2018-05-09 00:13:38 +02:00 committed by Greg Kroah-Hartman
parent 294c6cc336
commit 2444bdbebc
1 changed files with 8 additions and 0 deletions
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8
sound/usb/mixer.c
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@ -904,6 +904,14 @@ 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):