HDMI output with headphone jack sense possible on Conexant CX20561?

[Andrew Udvare <ddrtist@gmail.com>]

My audio codec is Conexant CX20561 (Hermosa) (haven't been able to find 
anything about 'Hermosa' on the Wiki).

I'd like to be able to do a few things which I have not been able to do with 
tutorials I found on the web:

- Whenever I plug in headphones, HDMI output is muted and headphones are 
enabled
  - Right now, the way I do this is by manually editing /etc/asound.conf to 
have the following (commented out makes headphones work, not commented makes 
HDMI work without any headphone/laptop speaker output)

/etc/asound.conf:
defaults.pcm.card 0
defaults.pcm.device 3

where 3 is my HDMI (IEC958 2; no idea what IEC958 1 is for) output. So I have 
a switcher script that does the commenting and uncommenting. Would be nice if 
this could be automatic (even if alsa had to run such a script on detecting 
headphones).

- Route audio output (PCM) to input (for mixer recording) (Intel HDA cannot do 
this apparently by default (thanks DRM), needs some hacking around?)

Information from alsa-info.sh: http://www.alsa-
project.org/db/?f=107f3f6012e68f04d3562d5e11aeb052a1454884

Are my model options correct?

And if it's important to know, I build ALSA in-kernel. Is this not 
recommended? I know at the very least it makes it such that I have to reboot 
to make any new options to take effect.

Thanks all
-- 
Andrew Udvare
audvare@gmail.com
978-870-5908
www.andyudvare.com