I have recently installed the xorg-11-drv-amdgpu 1.1.0 on my laptop. sources can found at.

http://CentOS.cms4all.org/CentOS/7/drivers/

http://CentOS.cms4all.org/CentOS/7/drivers/SRPM/xorg-x11-drv-amdgpu-1.1.0-1.el7.CentOS.src.rpm

Don’t forget that i use a newer mesa 11.1.2 and kernel 4.4.8 its. The kernel 3.10 was not build for that „new“ graphic cards“.

Sincerely

Andy Benzler