I have a question regarding cpu vs dsp speed. Looking at the stock version of the omap3-opp.h header file in the kernel source there seems to be a factor between the dsp and cpu frequency thats almost the same for every opp.

OPP CPU / DSP
1 125 / 90 = 1.38888889 (even though not used)
2 250 / 180 = 1.38888889
3 500 / 360 = 1.38888889
4 550 / 400 = 1.375
5 600 / 430 = 1.39534

I wonder if this is a preferable difference between the two?
If DSP is overclocked to 470 MHz the CPU should be set to 652 MHz? Whats a good dsp rate when cpu is running in 800 or 900 MHz? Going above 500 would be pushing it a little bit to far I guess :-) Or maybe this doesn't matter at all? (Sorry if someone already has Q&A this)