CONFIG_DRM_AUX_BRIDGE (not configurable)

modulename: aux-bridge.ko

configname: CONFIG_DRM_AUX_BRIDGE

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Device Tree and Open Firmware support
└─>DRM_AUX_BRIDGE
In linux kernel since version 4.19.310 (release Date: 2024-03-15)  
Simple transparent bridge that is used by several non-DRM drivers to
build bridges chain.

source code:
drivers/gpu/drm//bridge/aux-bridge.c