linux-kernel - Re: Microphone gain on N900

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Date:   Thu, 2 Mar 2017 15:28:22 +0100
From:   Pavel Machek <pavel@....cz>
To:     Jarkko Nikula <jarkko.nikula@...mer.com>
Cc:     Pali Rohár <pali.rohar@...il.com>,
        Peter Ujfalusi <peter.ujfalusi@...com>, sre@...nel.org,
        kernel list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
        aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
        patrikbachan@...il.com, serge@...lyn.com, abcloriens@...il.com
Subject: Re: Microphone gain on N900

Hi!

> >> v4.10 works quite nicely on N900, but I still have problems with
> >> audio. Even GSM calls would be usable, if I had reasonable volume on
> >> microphone and speaker... but I don't.
> >>
> >> Both speaker and microphone are too quiet. I can get louder output by
> >> plugging headset -- good. I can hear the other side nicely, but am
> >> too quiet for them. Unfortunately, even if I plug in wired headset,
> >> internal microphone is still used.
> >>
> For me these settings provide reasonable playback and capture volumes
> using v4.10.1:
> 
> amixer -D hw:0 set PCM 100%
> amixer -D hw:0 set 'Line DAC' 80% on
> amixer -D hw:0 set 'Line' on
> amixer -D hw:0 set 'Left Line Mixer DACL1' on
> amixer -D hw:0 set 'Right Line Mixer DACR1' on
> amixer -D hw:0 set 'Jack Function' 'Headphone'
> amixer -D hw:0 set 'TPA6130A2 Headphone' 80%
> 
> amixer -D hw:0 set 'Jack Function' 'Headset'
> amixer -D hw:0 set 'AGC' off
> amixer -D hw:0 set 'Input Select' 'ADC'
> amixer -D hw:0 set 'Left PGA Mixer Line1L' on
> amixer -D hw:0 set 'Left Line1L Mux' 'differential'
> amixer -D hw:0 set 'Right PGA Mixer Line1L' on
> amixer -D hw:0 set 'Right Line1L Mux' 'differential'
> amixer -D hw:0 set 'ADC HPF Cut-off' '0.0045xFs' 'disabled'
> amixer -D hw:0 set PGA 50% on
> amixer -D hw:0 cset iface=MIXER,name='PGA Capture Switch',index=0 on

This seems to correspond to volumes I have had before. They are enough
for phone call in quiet environment, but not really for normal usage.

Do you have settings where microphone on wired headset works?

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

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