path: root/sound
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authorTakashi Iwai <tiwai@suse.de>2013-06-05 08:35:26 +0200
committerTakashi Iwai <tiwai@suse.de>2013-06-05 08:35:26 +0200
commit11e7064f35bb87da8f427d1aa4bbd8b7473a3993 (patch)
treef3473d6219d632227584e3ee26e158fc9ebca9a5 /sound
parent8eafc0a161123d90617c9ca2eddfe87b382b1b89 (diff)
ALSA: usb-audio - Fix invalid volume resolution on Logitech HD webcam c270
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> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index ca4739c3f65..e5c7f9f20fd 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -886,6 +886,7 @@ 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.