AppleHDA kext for Codec Audio CX20671/2 (rarely)
Patch from stock AppleHDA.kext
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dump codec audio information from linux, checkout google.com for more information
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compile the codec dump(using script in my repository named "Scrip Patch Codec by HoangThanh")
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using Grafivz to generate the audio flowchart
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remove redundancy informations
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Change the info.plist in AppleHDA.kext/Show Package Contents/Contents/PlugIns/AppleHDAHardwareConfigDriver.kext/AppleHDA.kext/Show Package Contents/Contents/Info.plist
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Create the layout and platform from codec audio address (input & output)
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Compiler layout and platform to *.zlib and import to stock AppleHDA (using HDA wizard)
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Patch Binary for your kext using ./patch-hda.pl (address of your audio codec)
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Import the changes to stock kext
More infomation, visit http://www.insanelymac.com/forum/ note : it just a patch for your codec.