Intel HD Audio

modulename: snd-hda-intel.ko

and/or

snd-hda-codec.ko

configname: CONFIG_SND_HDA_INTEL

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>PCI sound devices
└─>Intel HD Audio
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Say Y here to include support for Intel "High Definition
Audio" (Azalia) and its compatible devices.

This option enables the HD-audio controller. Don't forget
to choose the appropriate codec options below.

To compile this driver as a module, choose M here: the module
will be called snd-hda-intel.

source code:
sound/pci//hda//