default or selected kernelversion does not have config value CONFIG_DRM_KMS_FB_HELPER.
Result is shown for kernelversion 6.9.9
CONFIG_DRM_KMS_FB_HELPER (not configurable)
configname: CONFIG_DRM_KMS_FB_HELPER
Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>DRM_KMS_FB_HELPER
In linux kernel since version 3.10 (release Date: 2013-06-30)
FBDEV helpers for KMS drivers.