On Mon 2015-01-26 15:20:28, Peter Ujfalusi wrote:

On 01/18/2015 02:01 PM, Pavel Machek wrote:

quoted

Hi!

If you have any idea about playback problems, help would be still
welcome. I'll have to do bisect, otherwise, and it will not be easy.

quoted

In 3.18, sound is nice and clear.

In 3.19, sound is unusable. It produces nasty tone when it should be
quiet, and there's at least as much noise as is sound.

Unfortunately, list of mixers also changed (and there's cca 120
settings), but a) it does not work with the old list and b) nothing I
could figure out did make the sound usable. Some setting resulted in
even more noise.

Any idea what could have caused it?

I tried audio recording this time.

In 2.6.28-nokia, it is neccessary to set "Input select" na "digital
mic", then it works. Input select being in "playback" option makes it
easy to miss.

In 3.18 and 3.19-rc3, all I can record are zeros.

Does playback/recording work for you on OMAP 3430-based machines?

Same codec (tlv320aic3106) works fine on my am335x and omap-l138 boards.
BeagleBoard-xM also fine with twl4030 codec.

I don't have my n900 in hacking mode (it is still in use
time-to-time) but

Actually, with nfsroot / loading kernel using NOLO, it is not
neccessary to break your n900. It is possible to boot complete
userspace without changing single bit of flash.

looking at the dts file: you might want to add ai3x-micbias-vg property to the
aic3x nodes to select the correct mic bias voltage. I can't recall what is
appropriate for n900, but 2.6.28-nokia sources might give you the answer.

Ok, thanks, let me try...
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html