[PATCH] drm/amdgpu: expose amdgpu_sensors on pre-powerplay chips
Alexander.Deucher at amd.com
Wed Feb 15 02:56:02 UTC 2017
> -----Original Message-----
> From: Michel Dänzer [mailto:michel at daenzer.net]
> Sent: Tuesday, February 14, 2017 9:52 PM
> To: Deucher, Alexander; 'Samuel Pitoiset'; StDenis, Tom
> Cc: amd-gfx at lists.freedesktop.org
> Subject: Re: [PATCH] drm/amdgpu: expose amdgpu_sensors on pre-
> powerplay chips
> On 15/02/17 01:17 AM, Deucher, Alexander wrote:
> >> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On
> >> Of Samuel Pitoiset
> >>> Otherwise, it seems to work though the GPU_TEMP reads as "5000" on
> >>> Kaveri (meaning temp of 5C which isn't true).
> >>> I suspect the dpm code is reading the wrong register to get the temp but
> >>> we can fix that in another change later on.
> >> No idea. It was just a copy-n-paste. Maybe the initial code is buggy?
> > I don’t know that the GPU temp sensor on CI based APUs actually works
> > properly. I think the package temperature is exposed via the CPU
> > thermals.
> Seems to work fine with radeon on my two Kaveri laptops, FWIW.
> On my desktop Kaveri, unplausibly low values (around 9-10C) are reported
> at idle for both GPU and CPU. With load, both go up to around 30C, so it
> seems like the values make sense in a relative sense but not in an
> absolute one.
I think I vaguely recall that it might actually be power rather than temperature. Need to check with the SMU guys.
> Earthling Michel Dänzer | http://www.amd.com
> Libre software enthusiast | Mesa and X developer
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