lkml.org 
[lkml]   [2017]   [Jan]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Nokia N900 headset detection & MIC Bias + TVOUT
On Sat, Jan 07, 2017 at 12:07:49AM +0100, Pali Rohár wrote:

> All that is needed in N900 sound driver, file sound/soc/omap/rx51.c. Can
> you help me which functions should I call to enable/disable it
> correctly? In headset detection code I need to be sure that nobody
> (other kernel drivers or userspace via alsamixer) except current
> function could change Bias settings.

> MIC Bias is controlled by MICBIAS_CTRL in aic34 'B' part codec, file
> tlv320aic3x.c.

Microphone biases are normally controlled by supply widgets and managed
via DAPM. You can see quite a few examples of this in existing drivers.
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2017-01-09 12:31    [W:0.077 / U:12.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site