MTK IOMMU Support

modulename: mtk_iommu.ko

configname: CONFIG_MTK_IOMMU

Linux Kernel Configuration
└─>Device Drivers
└─>IOMMU Hardware Support
└─>MTK IOMMU Support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
Memory Management Unit. This option enables remapping of DMA memory
accesses for the multimedia subsystem.

If unsure, say N here.

source code: