This is a note to let you know that I've just added the patch titled
ALSA: usb-audio - Fix invalid volume resolution on Logitech HD webcam c270
to the 3.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-usb-audio-fix-invalid-volume-resolution-on-logitech-hd-webcam-c270.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 11e7064f35bb87da8f427d1aa4bbd8b7473a3993 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Wed, 5 Jun 2013 08:35:26 +0200
Subject: ALSA: usb-audio - Fix invalid volume resolution on Logitech HD webcam c270
From: Takashi Iwai <tiwai@xxxxxxx>
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 RodrÃguez <crrodriguez@xxxxxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/usb/mixer.c | 1 +
1 file changed, 1 insertion(+)
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -886,6 +886,7 @@ static void volume_control_quirks(struct
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.
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-3.9/alsa-hda-add-keep_eapd_on-flag-to-generic-parser.patch
queue-3.9/alsa-hda-via-disable-broken-dynamic-power-control.patch
queue-3.9/alsa-usb-audio-fix-roland-cakewalk-um-3g-support.patch
queue-3.9/alsa-hda-allow-setting-automute-automic-hooks-after-parsing.patch
queue-3.9/alsa-usb-audio-apply-logitech-quickcam-pro-9000-quirk-only-to-audio-iface.patch
queue-3.9/alsa-hda-via-fix-wrongly-cleared-pins-after-suspend-on.patch
queue-3.9/alsa-usb-audio-fix-invalid-volume-resolution-on-logitech-hd-webcam-c270.patch
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