On 14/02/17 09:56 PM, Deucher, Alexander wrote:
-----Original Message-----
From: Michel Dänzer [mailto:[email protected]]
Sent: Tuesday, February 14, 2017 9:52 PM
To: Deucher, Alexander; 'Samuel Pitoiset'; StDenis, Tom
Cc: [email protected]
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:[email protected]] On
Behalf
Of Samuel Pitoiset
Otherwise, it seems to work though the GPU_TEMP reads as "5000" on
my
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.
On my retail kaveri (with latest bios...) it seems to track with load
but isn't really accurate (it'll jump double digits back and forth)
Eitherway though if Samuel updates the patches to include a check for
amdgpu_drm we should be able to commit them.
I've already created a patch for umr to read them, just waiting on the
kernel side to land.
Tom
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