CONFIG_DRM_DISPLAY_DP_TUNNEL (not configurable)

configname: CONFIG_DRM_DISPLAY_DP_TUNNEL

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>DRM_DISPLAY_DP_TUNNEL
In linux kernel since version 4.19.314 (release Date: 2024-05-17)  
Enable support for DisplayPort tunnels. This allows drivers to use
DP tunnel features like the Bandwidth Allocation mode to maximize the
BW utilization for display streams on Thunderbolt links.