NVIDIA Tegra host1x driver

modulename: host1x.ko

configname: CONFIG_TEGRA_HOST1X

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>NVIDIA Tegra host1x driver
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Driver for the NVIDIA Tegra host1x hardware.

The Tegra host1x module is the DMA engine for register access to
Tegra's graphics- and multimedia-related modules. The modules served
by host1x are referred to as clients. host1x includes some other
functionality, such as synchronization.

source code: