Hi,

make your sound work first, use ALCInject so you can do it. Download Taruga patcher v.1.20. When you have sound with alcinject and stock AppleHDA, drop linux codec dump onto taruga patcher's icon (dont start the patcher and drop dump on started application in the dock; drag and drop it on the patcher icon in its folder, it will auto start application by itself). When patching is finished you can remove alcinject and use patched applehda but you have to add efi string for it, dont forget it, as you won't have sound just with patched hda. Thats it dude.

Regards

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sorry for this stupid question but witch driver is bets for the 889a ?

There is no generic driver for ALC889, you should look for something specific to your mobo/computer/laptop model, as different hardware with the same codec may be different (different adresses, inputs/outputs, paths, etc.).
Having said that, tmongkol's thread on insanelymac have one of the most complete ALC885/9 patched AppleHDA kexts that I could find, if you have a Gigabyte motherboard that would be your best bet.
Alternatively you can always use VoodooHDA.