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    Subject[PATCH 3.16.y-ckt 11/71] ALSA: usb-audio: Add mic volume fix quirk for Logitech Quickcam Fusion
    Date
    3.16.7-ckt14 -stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Wolfram Sang <wsa@the-dreams.de>

    commit 1ef9f0583514508bc93427106ceef3215e4eb1a5 upstream.

    Fix this from the logs:

    usb 7-1: New USB device found, idVendor=046d, idProduct=08ca
    ...
    usb 7-1: Warning! Unlikely big volume range (=3072), cval->res is probably wrong.
    usb 7-1: [5] FU [Mic Capture Volume] ch = 1, val = 4608/7680/1

    Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
    Signed-off-by: Takashi Iwai <tiwai@suse.de>
    Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
    ---
    sound/usb/mixer.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
    index aa4d14247855..b4283660d430 100644
    --- a/sound/usb/mixer.c
    +++ b/sound/usb/mixer.c
    @@ -914,6 +914,7 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
    case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
    case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
    case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */
    + case USB_ID(0x046d, 0x08ca): /* Logitech Quickcam Fusion */
    case USB_ID(0x046d, 0x0991):
    /* Most audio usb devices lie about volume resolution.
    * Most Logitech webcams have res = 384.

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