[alsa-devel] Intel HDA pin-config values (patch_sigmatel.c) - Dell Inspiron 1721 (also 1521?) mic

Tobin Davis tdavis at dsl-only.net
Sat Aug 11 18:28:17 CEST 2007

I have some spare time this weekend to review this.  Could you sent me
the output from
http://bulletproof.servebeer.com/alsa/scripts/alsa-info.sh ?  Let's take
this off-list and see if I can get it working for you.

For Sigmatel codecs, I usually get the pin configurations directly from
the Windows INI file for the driver.  Most of the time, this works very


On Sat, 2007-08-11 at 16:24 +0100, Thorsten Riess wrote:

> Hi,
> I am wondering where the values of ref9205_pin_configs in patch_sigmatel
> come from. The SigmaTel documentation gives different reference values for
> the 9205.
> The set of values I use at the moment is
> static unsigned int ref9205_pin_configs[12] = {
> 	0x02214020, 0x02a19041, 0x40000100, 0x40000100,
> 	0x40000100, 0x40000100, 0x40000100, 0x40000100,
> 	0x10a000f0, 0x50a000f0, 0x01441030, 0x01c41030
> };
> (the first two are actually from the SigmaTel document, the other just mute
> the remaining in/outs)
> These numbers actually work quite well for the Dell Inspiron 1721 (and
> probably for the 1521), even the mic input works - although the quality
> could be better and the input levels have to be adjusted carefully.
> Can anybody confirm this?
> Thorsten.
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Tobin Davis <tdavis at dsl-only.net>

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