Yes, it is possible, limit in overclock.diff is 600 but i've recompiled it with limit set to 800. TBH there is something strange in kernel-power re DSP bridge clocks, still not found what exactly and that is what stops me to send new patch to pali with bridgedriver from Harmattan. Everything else seems to run perfectly. And I also made it compatible with both old and new DSP ioctls, so for 720p no different driver will be needed, neither new libbridge. I will need just a couple of days to fugure out how exactly are clocks managed and it will be ready