Re: [PATCH] arm64: dts: meson: remove CPU opps below 1GHz for G12B/SM1

[Kevin Hilman]

Christian Hewitt <christianshewitt@xxxxxxxxx> writes:

> Amlogic G12B and SM1 devices experience CPU stalls and random board
> wedges when the system idles and CPU cores clock down to lower opp
> points. Recent vendor kernels include a change to remove 100-250MHz
> (with no explanation) [0] but other downstream sources also remove
> the 500/667MHz points (also with no explanation). Unless 100-667Mhz
> opps are removed or the CPU governor forced to performance, stalls
> are observed, so let's remove them an improve stability/uptime.

Just curious: what CPUfreq governor do you use by default for the
LibreELEC kernel?

Your patch greatly improves the stability I'm seeing, but doesn't quite
elimitate it.

I'm testing suspend/resume in a loop on VIM3, and with schedutil
(default) or ondemand, it eventually hangs.  With either powersave or
performance it's stable.  

Kevin