I was not able to do the bisect as I was busy during the week, Now I have completed the bisect. Everything was working fine in 4.8-rc2 but in 4.9-rc2 topaz failed to initialize. When I tried using 4.8-rc3 I noticed another error. The amdgpu loads successfully but when I try to use it via vdpau it leads to errors. I will file another bug for that. I guess this bug need to wait sometime.