From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pavel Hofman <pavel.hofman@ivitera.com>
Subject: Re: [BAD PATCH] ice1712: Add support for Philips
 PSC724 Ultimate Edge
Date: Tue, 13 Mar 2012 22:25:54 +0100
Message-ID: <4F5FBB62.4020300@ivitera.com>
References: <201203132159.19733.linux@rainbow-software.org>
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To: Ondrej Zary <linux@rainbow-software.org>
Cc: alsa-devel@alsa-project.org
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Dne 13.3.2012 21:59, Ondrej Zary napsal(a):
> Hello,
> I'm trying do implement support for Philips PSC724 Ultimate Edge card, which 
> is based on VT1722 + WM8776 + WM8766 chips. I've examined the connections
> and commented them in the code. The patch is heavily based on se.c.
> 
> When trying to play a sound, the player runs but no sound comes from the
> output, no matter what I do with alsamixer.
> 
> The interesting thing is that recording works - I can record something from
> e.g. line-in and play it on another machine. Recording source selection
> in alsamixer works too (if line-in is deselected, only silence is recorded).
> So WM8776 I2C control works.
> 
> I'm missing something but don't know what. Any ideas?
> 

I always found that a simple proc interface listing all register values
of the chips onboard greatly helped with troubleshooting. E.g.
http://git.alsa-project.org/?p=alsa-kmirror.git;a=blob;f=i2c/other/ak4xxx-adda.c;h=cef813d23641afcd39b56a57c5fc8058cb99bfb0;hb=HEAD#l879

http://git.alsa-project.org/?p=alsa-kmirror.git;a=blob;f=i2c/other/ak4114.c;h=fdf3c1b65e388414c995a597ef2b351b4ec2a220;hb=HEAD#l451


Regards,

Pavel.