https://bugzilla.kernel.org/show_bug.cgi?id=201539
--- Comment #32 from MasterCATZ (mastercatz@hotmail.com) --- apparently I was looking through kernel 4.7 code on my pc and not master linux/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c looks like the new file name
as they relocated ci_dpm.c to /home/aio/Programs/linux/drivers/gpu/drm/radeon/ci_dpm.c