CONFIG_DRM_CLIENT_LIB (not configurable)

modulename: drm_client_lib.ko

configname: CONFIG_DRM_CLIENT_LIB

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>DRM_CLIENT_LIB
In linux kernel since version 5.4.290 (release Date: 2025-02-01)  
This option enables the DRM client library and selects all
modules and components according to the enabled clients.

source code:
drivers/gpu/drm//