From: Jiri Jaburek <jjaburek@redhat.com>
Date: Thu, 18 Dec 2014 01:03:19 +0000 (+0100)
Subject: ALSA: usb-audio: extend KEF X300A FU 10 tweak to Arcam rPAC
X-Git-Tag: v3.2.67~89
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=36a2df11abacb265b69419a82c83f7fc819defe7;p=pandora-kernel.git

ALSA: usb-audio: extend KEF X300A FU 10 tweak to Arcam rPAC

commit d70a1b9893f820fdbcdffac408c909c50f2e6b43 upstream.

The Arcam rPAC seems to have the same problem - whenever anything
(alsamixer, udevd, 3.9+ kernel from 60af3d037eb8c, ..) attempts to
access mixer / control interface of the card, the firmware "locks up"
the entire device, resulting in
  SNDRV_PCM_IOCTL_HW_PARAMS failed (-5): Input/output error
from alsa-lib.

Other operating systems can somehow read the mixer (there seems to be
playback volume/mute), but any manipulation is ignored by the device
(which has hardware volume controls).

Signed-off-by: Jiri Jaburek <jjaburek@redhat.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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