linux-kernel - Re: [PATCH v3 6/6] ARM64: mt8195: Use thermal aggregation for big and little cpu

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Date: Wed, 29 May 2024 14:39:12 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Alexandre Bailon <abailon@...libre.com>, rafael@...nel.org,
 daniel.lezcano@...aro.org, robh+dt@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org
Cc: rui.zhang@...el.com, lukasz.luba@....com, linux-pm@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 6/6] ARM64: mt8195: Use thermal aggregation for big and
 little cpu

On 29/05/2024 10:19, Alexandre Bailon wrote:
> 
> 
> On 5/27/24 08:56, Krzysztof Kozlowski wrote:
>> On 24/05/2024 16:31, Alexandre Bailon wrote:
>>> This uses the thermal aggregation for the mt8195 to get the maximal
>>> temperature of big and little cpu clusters.
>>>
>>> Signed-off-by: Alexandre Bailon <abailon@...libre.com>
>>> ---
>>>   arch/arm64/boot/dts/mediatek/mt8195.dtsi | 212 +++--------------------
>>>   1 file changed, 27 insertions(+), 185 deletions(-)
>>>
>>> diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
>>> index 5d8b68f86ce4..8aa2bf142622 100644
>>> --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
>>> +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
>>> @@ -3600,50 +3600,31 @@ dp_tx: dp-tx@...00000 {
>>>   	};
>>>   
>>>   	thermal_zones: thermal-zones {
>>> -		cpu0-thermal {
>>> +		cpu-little {
>>
>> How is it related to the commit?
> To aggregate all thermal sensors which are in same performance domain, 
> we removes each individual nodes to create only two: cpu-little and cpu-big.

OK...

> We need to remove the other nodes because their trips points and cooling 
> devices would conflict with those we define for the multi sensor thermal 
> zone.
> 
> Best Regards,
> Alexandre
>>
>> Does not look tested. You just introduced warnings.

Yet still I claim it wasn't tested. See SoC maintainer profile documents
and/or writing-schema.

Best regards,
Krzysztof