GScaler

configname: CONFIG_DRM_EXYNOS_GSC

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>GScaler
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Choose this option if you want to use Exynos GSC for DRM.