[alsa-devel] mic on macbook air

[Takashi Iwai]

At Mon, 27 Sep 2010 00:32:03 +0200,
Reimundo wrote:
> 
> Hello list, from time to time I spend some time trying to get the mic
> working on a Macbook air 2,1. I tried looking at the relevant info from
> the corresponding kernel extensions on mac os X. The codec has  "Vendor
> Id: 0x10ec0885" so the relevant part of the info.plist on mac os X reads
> 
> <dict>
> <key>MicAttributes</key>
> <integer>28</integer>
> <key>MicInfo</key>
> <string>Sampled on rising edge</string>
> <key>NodeID</key>
> <integer>39</integer>
> <key>PinConfigDefault</key>
> <integer>2426405136</integer>
> </dict>
> 
> Which tells me nothing. In particular I don't have a node 0x27=39 (at
> least not that hda-analyzer sees) so it's not surprising that if I send
> the corresponding verbs to set_config_default I don't get anything.
> Also, I don't see how setting the pinconfigdefault could affect my not
> having the mic working (anyway I tried setting those pinconfigdefaults
> that put the node as a fixed mic on all nids 0x19-0x1c to no avail)
> 
> As for the sampled on rising edge, I don't know how to use this info.
> any ideas?

Justin Mattock made once some patches for MacBookAir, but they are
pending because no one tested yet.

Justin, could you repost the patches (rebase if needed) for testing
again?


thanks,

Takashi