[alsa-devel] ASoC: wm9712: Microphone doesn't work: Mux handling broken?
chf.fritz at googlemail.com
Sat May 12 02:15:56 CEST 2012
> > Framebuffer driver mx3fb configured for a 800x600 display:
> > soc-audio soc-audio: ASoC machine PhyCORE-ac97-audio should use snd_soc_register_card()
> > asoc: platform pcm constructor failed
> > asoc: can't create pcm HiFi :-12
> > asoc: failed to instantiate card PhyCORE-ac97-audio: -12
> When I do decrease from 800x600 to 800x594, wm9712 works.
> Any ideas?
It seems to be a dma problem and not directly related to wm9712.
But the not working microphone input still bothers me. I suppose this
is related to not beeing able to change some muxes:
$ amixer sset "Mic Select Source" 'Mic 2'
Simple mixer control 'Mic Select Source',0
Items: 'Mic 1' 'Differential' 'Mic 2' 'Stereo'
Item0: 'Mic 1'
$ amixer sset "Differential Source" 'Line'
Simple mixer control 'Differential Source',0
Items: 'Mic' 'Line'
They refuse to change their Item0 because they are defined as
SND_SOC_DAPM_MUX without a correlating path->name so that
snd_soc_dapm_mux_update_power() (in sound/soc/soc-dapmc) doesn't
It works in 2.6.33, but current kernel has different mux handling and
it seems that no one since cared that much about microphone support.
Mark, can you confirm this, purpose a fix or even come up with
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