https://bugzilla.kernel.org/show_bug.cgi?id=60523
--- Comment #76 from Steven Haigh netwiz@crc.id.au --- Hmmm - yet when I hit submit on this page, it pushed the GPU up a power level, and now its stuck there again:
$ cat /sys/kernel/debug/dri/64/radeon_pm_info uvd vclk: 0 dclk: 0 power level 2 sclk: 90000 mclk: 105000 vddc: 1175 vddci: 1150