linux-kernel - Commit a551d91473 (ALSA: hda - Use regmap for command verb caches, too) breaks TOSLINK

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Message-ID: <20150416071504.GA393@x4>
Date:	Thu, 16 Apr 2015 09:15:04 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	linux-kernel@...r.kernel.org
Cc:	Takashi Iwai <tiwai@...e.de>
Subject: Commit a551d91473 (ALSA: hda - Use regmap for command verb caches,
 too) breaks TOSLINK

Hi,

since commit a551d914:
Author: Takashi Iwai <tiwai@...e.de>
Date:   Thu Feb 26 12:34:49 2015 +0100

    ALSA: hda - Use regmap for command verb caches, too

my DAC receives no signal over TOSLINK-S/PDIF anymore.

Reverting the commit on top of the current Linus tree "fixes" the issue.

 % aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: VT1708S Analog [VT1708S Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: SB [HDA ATI SB], device 3: VT1708S Digital [VT1708S Digital]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: ID 791a Digital [ID 791a Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

[VT1708S Digital] is the device I use.

 # cat /etc/asound.conf
pcm.!default {
  type hw
  card 0
  device 3
}

ctl.!default {
  type hw
  card 0
  device 3
}

pcm.crossfeed {
  type plug
  slave.pcm "ladspa"
}

pcm.guitar {
  type plug
  slave.pcm "ladspa2"
}

pcm.ladspa {
  type ladspa
  slave.pcm "plughw:0,3";
  path "/usr/lib/ladspa";
  plugins [
    {
      label bs2b
      input {
        controls [ 700 4 ]
      }
    }
 ]
}

pcm.ladspa2{
  type ladspa
  slave.pcm "plughw:2,0";
  path "/usr/lib/ladspa";
  plugins [
    {
      label bs2b
      input {
        controls [ 700 4 ]
      }
    }
 ]
}

-- 
Markus
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