Silicon Image SII9234 HDMI/MHL bridge

modulename: sii9234.ko

configname: CONFIG_DRM_SII9234

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>Display Interface Bridges
└─>Device Tree and Open Firmware support
└─>Silicon Image SII9234 HDMI/MHL bridge
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Say Y here if you want support for the MHL interface.
It is an I2C driver, that detects connection of MHL bridge
and starts encapsulation of HDMI signal.

source code: