default or selected kernelversion does not have config value CONFIG_DRM_EXYNOS_IOMMU.
Result is shown for kernelversion 6.9.9
CONFIG_DRM_EXYNOS_IOMMU (not configurable)
configname: CONFIG_DRM_EXYNOS_IOMMU
Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>DRM_EXYNOS_IOMMU