Synopsis Designware AHB Audio interface

modulename: dw_hdmi-ahb-audio.ko

and/or

dw-hdmi-ahb-audio.ko

configname: CONFIG_DRM_DW_HDMI_AHB_AUDIO

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>Display Interface Bridges
└─>Synopsis Designware AHB Audio interface
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Support the AHB Audio interface which is part of the Synopsis
Designware HDMI block. This is used in conjunction with
the i.MX6 HDMI driver.

source code:
drivers/gpu/drm//bridge/dw_hdmi-ahb-audio.c