AMD GPU

modulename: amdgpu.ko

and/or

amdxcp.ko

configname: CONFIG_DRM_AMDGPU

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>AMD GPU
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Choose this option if you have a recent AMD Radeon graphics card.

If M is selected, the module will be called amdgpu.

source code:
drivers/gpu/drm//amd/amdgpu/