[alsa-devel] ALSA and MediaController

Raymond Yau superquad.vortex2 at gmail.com
Mon May 23 07:39:08 CEST 2011

2011/5/21 Mark Brown <broonie at opensource.wolfsonmicro.com>:
>> How Media controller or PA handle hda jack retasking of those 3 jacks
>> motherboard (channel mode or smart 5.1 switch) ?
>> For those mini ITX motherboard without front audio panel, there will
>> be no capture source if the HDA codec does not support stereo mix
>> after the driver retask those input jacks for 5.1 outputs
> This just sounds like a fairly basic reconfiguration of the CODEC, it's
> no different to any other rerouting.
>> Does this mean that those 3 jacks , 5 jacks and 6 jacks desktop need
>> to add the rear panel jack to use snd_jack_report ?
> It seems like a good idea to report any jacks we can do detection on....

But snd_jack API seem does not has any definition for "Line In" - Blue jacks ?

The jack retasking is performed by snd_hda_sequence_write_cache(codec,
chmode[mode].sequence) in snd_hda_ch_mode_put() for some HDA codecs

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