AMD Radeon HD 8570m

Hello to all, I am using Linux for a long time and I've tried to install Freebsd on Lenovo G500 laptop. I've used desktop-installer script, my Lenovo has 2 gpus, one is Intel HD 4000 and 2nd one is AMD Radeon HD 8570m, But I cant get it to work. Has someone had luck with this HW?
I am grateful for any answer or advice.