[alsa-devel] hda: Cirrus: fixes for CS4207 coef setup

Takashi Iwai tiwai at suse.de
Fri Nov 2 10:07:43 CET 2012

At Thu,  1 Nov 2012 13:42:36 +0100,
Alexander Stein wrote:
> Hi,
> I'm noticing some problems using the CS4207 codec with out custom board.
> Output works fine so far, but I noticed that input on ADC1 (blue) is just mono
> and input on ADC2 (pink) is reversed stereo. Both tests were done by playing
> a wav on an output and directly feeding the input. After some investigations,
> I found out, that coef in the patch_cirrus driver don't match the CS4207
> datasheet (CS4207-F4). As the driver also mentions CS4206 I'm aware that my
> pathces might not be suitable in general, but I couldn't find any datasheet
> for CS4206 so I can't compare the coef settings.
> Summarized here:
> * The beep bits were written to the wrong index (See CS4207-F4
>   BeepConfiguration(CIR=0004h))
> * The DMIC enable signals were written to the wrong index (Same chapter as
>   above)
> As the drivers sets 2 DMIC bits each, while CS4207 has only 1 for each, the
> coef interface might be different on both codec.
> Maybe someone with more detailed knowledge about the CS4206 can put his
> comments.

Thanks for the patch.  I'll take a look at these in the next week and
queue as 3.7 fixes if they are OK (I suppose so, judging through a
quick glance).


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