https://bugs.freedesktop.org/show_bug.cgi?id=67435
--- Comment #7 from Rafał Miłecki zajec5@gmail.com --- Err, did you call "avivotool regs hdmi" as I asked?
It should return something like:
Audio clocks: EVERGREEN_AUDIO_PLL1_MUL 00000000 EVERGREEN_AUDIO_PLL1_DIV 00000001 EVERGREEN_AUDIO_PLL1_UNK 00000070
which is the most interesting part for us.
Of course on R6xx hardware it won't start with EVERGREEN_*