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From: Aurélien <aurelien@ap2c.com>
To: alsa-devel@alsa-project.org
Subject: Garbage returned while reading unused S/PDIF, A CM106 like sound card
Date: Tue, 04 Jul 2023 20:06:04 +0200	[thread overview]
Message-ID: <5962046.lOV4Wx5bFT@antimony.ap2c.org> (raw)

Hello, 

I encounter troubles while using S/PDIF input on an CM106 like sound card 
(vendor 0x0d8c, device 0x0102) when the remote device which is connected by S/
PDIF to the sound card is powered off.
In that case garbage data are reading from the S/PDIF rather than.. nothing

It is really boring since this S/PDIF input is connected to the output 
speakers and once the remote deviced is powered off it emits a really 
disturbing sound.
Since there is no input on the S/PDIF I guess that it could be a driver bug?
If it's an hardware bug (I don't encounter the problem under windows..) is it 
possible to make a hack in order to distinguish between real data and noise on 
the S/PDIF input?

Unfortunately this test is performed on an embedded device which runs linux 
5.16.17-sun50iw6. I don't know if this problem still occurs with newer alsa 
version.

Thank you in advance for your help.
Regards, 

Aurélien



             reply	other threads:[~2023-07-04 18:07 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-04 18:06 Aurélien [this message]
2023-07-05 16:27 ` Garbage returned while reading unused S/PDIF, A CM106 like sound card Geraldo Nascimento

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