https://bugzilla.kernel.org/show_bug.cgi?id=201539
--- Comment #54 from michael (lkbugs@deegan.id.au) --- It seems that since kernel 5.6 (or at least Debian's version thereof), I no longer need to fiddle with /sys/class/drm/card0/device/hwmon/hwmon3/pwm1_enable. The default value (1) seems to do the right thing now. Progress!
Mind you, lmsensors is still unable to report fan speed, and gives nonsensical values for crit/hyst temperatures. I have a feeling that further improvements to power management may be possible too.
amdgpu-pci-0100 Adapter: PCI adapter vddgfx: +1.00 V fan1: N/A (min = 0 RPM, max = 0 RPM) edge: +73.0°C (crit = +104000.0°C, hyst = -273.1°C) power1: 58.21 W (cap = 208.00 W)