Boost at high idle with a whistle.

[NDISX15]

Its trying to regen, theres no need to kick the idle up on it to do it. If its idling up and building boost by itself then that's fine. Its trying to get the exhaust and DPF temps where it wants it to regen the DPF filter. When it does that, just let it run. About 45 min to an hour give or take depending on how much soot is in the DPF it should finish and idle itself back down to normal and open up the turbo and stop building boost.