CONFIG_DRM_KMS_CMA_HELPER (not configurable)
configname: CONFIG_DRM_KMS_CMA_HELPER
Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager
└─>DRM_KMS_CMA_HELPER
In linux kernel since version 3.1 (release Date: 2011-10-24)
Choose this if you need the KMS CMA helper functions