On 11/9/21 2:29 AM, Lukasz Luba wrote:

Hi Steev,

That's interesting what you've done with Rockchip RK3399.
I would like to reproduce your experiment on my RockPI 4B v1.3.
Could you tell me how you to add this boost frequency that you have
mentioned in some previous emails?

I want to have similar setup to yours and I'll check all the subsystems
involved in the decision making process for triggering this boost freq.

Thank you for your support.

Regards,
Lukasz

Hi Lukasz,

It was actually something that Armbian had been doing as an overlay for 
their setup, and I thought, why does it need to be an overlay, when we 
could simply hide it behind turbo-mode so that if users want to 
overclock, they simply echo 1 and if it's unstable or cooling/power 
isn't enough, they can echo 0 or leave it off (boost defaults to off) - 
so that being said:

I apply this patch 
https://gitlab.com/kalilinux/build-scripts/kali-arm/-/blob/master/patches/pinebook-pro/pbp-5.14/rk3399-opp-overclock-2GHz-turbo-mode.patch 
which adds the 1.5GHz for little cores and 2GHz for the big to the 
rk3399 dtsi

To enable at boot time, I simply have "echo 1 > 
/sys/devices/system/cpu/cpufreq/boost" in my /etc/rc.local  And to 
disable, simply echo 0 in there (it defaults to 0 so it's off and most 
users won't know it exists.)

I'm pretty sure this is "abusing" turbo-mode, but it works well enough...

Hope that helps,

-- steev