From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 5 Jun 2013 06:35:26 +0000 (+0200)
Subject: ALSA: usb-audio - Fix invalid volume resolution on Logitech HD webcam c270
X-Git-Tag: v3.2.47~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=89dc57e2f08f9dca506ca7b023d62ab46b8b196c;p=pandora-kernel.git

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>
---

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