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authorTakashi Iwai <tiwai@suse.de>2013-06-05 08:35:26 +0200
committerBen Hutchings <ben@decadent.org.uk>2013-06-19 02:16:55 +0100
commit89dc57e2f08f9dca506ca7b023d62ab46b8b196c (patch)
tree8e0527beac9424652595f44064ff87903049cdf3
parent9c0c3f80d5a7e370920841d471b797e123fe3c4c (diff)
ALSA: usb-audio - Fix invalid volume resolution on Logitech HD webcam c270
commit 11e7064f35bb87da8f427d1aa4bbd8b7473a3993 upstream. USB audio driver spews an error message when probing Logitech HD webcam c270: ALSA mixer.c:1300 usb_audio: Warning! Unlikely big volume range (=6144), cval->res is probably wrong. ALSA mixer.c:1304 usb_audio: [5] FU [Mic Capture Volume] ch = 1, val = 1536/7680/1 Obviously the device needs a fixed volume resolution (cval->res = 384) like other Logitech devices. Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=821735 Reported-and-tested-by: Cristian Rodríguez <crrodriguez@opensuse.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
-rw-r--r--sound/usb/mixer.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index f4540bffa5de..97ec155f28e8 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -822,6 +822,7 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
case USB_ID(0x046d, 0x0808):
case USB_ID(0x046d, 0x0809):
case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
+ case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
case USB_ID(0x046d, 0x0991):
/* Most audio usb devices lie about volume resolution.
* Most Logitech webcams have res = 384.