[Bug 201539] AMDGPU R9 390 automatic fan speed control in Linux 4.19/4.20/5.0

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=201539

--- Comment #22 from MasterCATZ (mastercatz at hotmail.com) ---


(In reply to Sean Birkholz from comment #19)
> I've done a bit of digging and I've managed to get a proper hysteresis value
> to appear in a 5.1.14 kernel built from source.


> I modified (kernel src)/drivers/gpu/drm/amd/powerplay/inc/pp_thermal.h and
> changed the values of -273150 to 90000.  This corrects the hysteresis value
> but I'm still searching for where the critical temp value is actually set.


I think you hit the nail on the head 

amdgpu-pci-0100
Adapter: PCI adapter
vddgfx:       +0.90 V  
fan1:             N/A  (min =    0 RPM, max =    0 RPM)
edge:         +50.0°C  (crit = +104000.0°C, hyst = -273.1°C)
power1:       11.03 W  (cap = 208.00 W)

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