https://bugs.freedesktop.org/show_bug.cgi?id=49981
--- Comment #17 from graham grhm.perry@gmail.com --- (In reply to comment #15)
Good catch. Fixed in v3 of the patch.
Um, you now seem to be putting mclk and voltage in the high state, while leaving the engine clock really low. Surely you'll fry the gpu by over-volting it.