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jock

[rk3288] Linux 5.1.y and no thermal trip points

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Is it my fault or the thermal trip points and cooling steps disappeared in Linux 5.1 on (at least) RK3288 devices?

 

The "C/St." field from armbianmonitor -m disappeared:

root@xt:/home/paolo# uname -a
Linux xt 5.1.7-rockchip #5.88 SMP PREEMPT Sat Jun 8 13:06:26 UTC 2019 armv7l armv7l armv7l GNU/Linux

root@xt:/home/paolo# armbianmonitor -m
Stop monitoring using [ctrl]-[c]
Time        CPU    load %cpu %sys %usr %nice %io %irq   CPU

12:03:51: 1608MHz  0.58   7%   1%   5%   0%   0%   0% 58.6°C
12:03:56:  696MHz  0.54   4%   1%   3%   0%   0%   0% 58.6°C
12:04:01:  696MHz  0.49   4%   1%   3%   0%   0%   0% 56.8°C

and if I launch a stress test the SoC happily goes beyond 80°C

 

 

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FYI, just upgraded to dev kernel 5.2 and thermal trip points are back!

 

root@xt:/home/paolo# armbianmonitor -m
Stop monitoring using [ctrl]-[c]
Time        CPU    load %cpu %sys %usr %nice %io %irq   CPU  C.St.

16:08:41:  600MHz  1.58  20%   3%  12%   0%   4%   0% 62.9°C  0/11
16:08:46: 1608MHz  1.46  12%   2%   8%   0%   1%   0% 62.1°C  0/11

 

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