https://bugs.freedesktop.org/show_bug.cgi?id=73511
--- Comment #1 from Tom Stellard tstellar@gmail.com --- This is unsupported at the moment. To get this to work you would need to add GPU clock speed to the RADEON_INFO ioctl in the kernel and also add a PIPE_COMPUTE_CAP for it. This shouldn't be too difficult to do, if you are interested.