linux-kernel - Re: nouveau: temperature on nv40 is unavailable since ad40d73ef533ab0ad16b4a1ab2f7870c1f8ab954

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Date:	Wed, 14 Aug 2013 22:07:24 -0400
From:	Martin Peres <martin.peres@...ri.fr>
To:	Pali Rohár <pali.rohar@...il.com>
CC:	David Airlie <airlied@...ux.ie>, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Ben Skeggs <bskeggs@...hat.com>
Subject: Re: nouveau: temperature on nv40 is unavailable since ad40d73ef533ab0ad16b4a1ab2f7870c1f8ab954

On 14/08/2013 05:02, Pali Rohár wrote:
> On Tuesday 13 August 2013 15:55:28 Martin Peres wrote:
>> On 13/08/2013 09:53, Pali Rohár wrote:
>>> On utorok, 13. augusta 2013 15:32:45 CEST, Martin Peres
> wrote:
>>>> On 13/08/2013 09:23, Pali Rohár wrote:
>>>>> On Tuesday 13 August 2013 09:01:19 Martin Peres wrote:
>>>>   ...
>>>>
>>>> You can check the temperature by running nvidia-settings.
>>>> If you can't see the temperature in it, then nvidia
>>>> doesn't support it on your card and
>>>> I'm not sure we should :s
>>>>
>>>> Thanks for the vbios you sent me in private. For the
>>>> others, the reason why he doesn't have temperature anymore
>>>> is because his vbios lacks sensor calibration values.
>>> In nvidia-settings tab "GPU 0 - (GeForce 6600 GT)" -->
>>> "Thermal Settings" is:
>>>
>>> Thermal Sensor Information:
>>> ID: 0
>>> Target: GPU
>>> Provider: GPU Internal
>>> Temperature: 70 C (now)
>>>
>>> I looked in Windows program SpeedFan. It found Nvidia PCI
>>> card and reported "GPU Temp" about 68-70 C. So it looks
>>> like both nvidia driver and windows SpeedFan program
>>> reading same values.
>> Great, I'll cook you a patch in a bit and you'll see what the
>> temperature is like. It won't be perfectly accurate but there
>> is some kind of default for nvidia cards of this generation.
> Ok, send me patch and I can try it if it will work and report
> similar values as windows or nvidia driver.
>
Sorry for the late answer.

Please test this patch. Be aware that temperature with nouveau will be 
higher than with the blob.
I only want to see if nouveau reports a temperature.

The only way to be sure if the values are good-enough would be to use 
the blob and run:
nvapeek 0x15b0
Please send me the result along with the temperature reported by nvidia 
at the time of the peek.

Martin

PS: This patch has only be compile-tested, I don't have access to an 
nv4x right now.

View attachment "0001-drm-nv40-therm-set-default-calibration-values-if-nee.patch" of type "text/x-patch" (4954 bytes)