Comment # 2 on bug 93522 from EoD

Are you referring to DRM_FBDEV_EMULATION?

│ Symbol: DRM_FBDEV_EMULATION [=n]
│
│ Type  : boolean
│ Prompt: Enable legacy fbdev support for your modesetting driver
│   Location:
│     -> Device Drivers
│       -> Graphics support
│ (1)     -> Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
(DRM[=y])
│   Defined at drivers/gpu/drm/Kconfig:50
│   Depends on: HAS_IOMEM [=y] && DRM [=y]
│   Selects: DRM_KMS_HELPER [=y] && DRM_KMS_FB_HELPER [=y]