[Bug 28745] RS780: dynpm makes my cat levitate (div by 0)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28745

--- Comment #11 from Alex Deucher <agd5f at yahoo.com> 2010-06-25 14:11:50 PDT ---
(In reply to comment #10)
> 
> Why do we cycle through the (all?) power states?

It's a simple algo :)
I suppose the alternative would be to just switch between a low and high one. 
It's easier for the plls to lock after a small change, so there's less of a
delay when making small changes to the clocks, but that's about it.  If we had
more advanced pm algos there might be advantages to staying in intermediate
states for certain reasons (e.g., to maintain enough bandwidth or performance
for certain tasks, etc.).

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