Tegra20 DAS module

modulename: snd-soc-tegra20-das.ko

configname: CONFIG_SND_SOC_TEGRA20_DAS

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>Tegra20 DAS module
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say Y or M if you want to add support for the Tegra20 DAS module.
You will also need to select the individual machine drivers to
support below.

source code:
sound/soc//tegra/