[Bug 75729] [hsw dp audio] Muting S/PDIF turns off DP

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75729

--- Comment #7 from Daniel Martin <consume.noise at gmail.com> ---
(In reply to comment #5)
> Could you raise the question to ALSA mailiing list
> alsa-devel at alsa-project.org?
>
> I'm not sure about user space behavior. 
> Maybe someone on the mailist list could share more information.

Done and Takashi Iwai replied: It's an issue of Haswell graphics side.  From
the audio POV, it merely turns on/off the IEC958 status bits in the HDMI audio
codec.
    http://mailman.alsa-project.org/pipermail/alsa-devel/2014-March/074707.html

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