linux-kernel - Re: [PATCH] arm64: dts: qcom: sc8280xp: Introduce additional tsens instances

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Date: Fri, 26 Jan 2024 13:09:02 +0100
From: Johan Hovold <johan@...nel.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: Bjorn Andersson <quic_bjorande@...cinc.com>,
	Bjorn Andersson <andersson@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sc8280xp: Introduce additional tsens
 instances

On Fri, Jan 26, 2024 at 11:48:03AM +0100, Konrad Dybcio wrote:
> On 1/26/24 11:00, Johan Hovold wrote:
> > On Fri, Jan 19, 2024 at 12:31:06AM +0100, Konrad Dybcio wrote:
> >> On 1/19/24 00:00, Bjorn Andersson wrote:
> > 
> >>> +		gpu-thermal {
> >>> +			polling-delay-passive = <250>;
> >>> +			polling-delay = <1000>;
> >>
> >> Hm, did tsens only gain support of non-polled reporting with 8450?
> >>
> >> If not, we should definitely update all the relevant SoCs.
> > 
> > Did you determine whether the interrupts work as expected?
> 
> Yes, they seem to!

Excellent.

> > We don't want to be polling here unless we have to (i.e. polling-delay
> > should be 0 as per the binding).
> 
> Even better:
> 
> https://lore.kernel.org/lkml/20240125-topic-thermal-v1-0-3c9d4dced138@linaro.org/

I'm not sure that's better, but either way we want to set
'polling-delay' to zero here as we don't want to have to wait for that
binding and driver update to hit mainline in 6.9-rc1 before merging this
patch.
 
> Believe me, I'm not omitting you from Cc on purpose.. I usually
> realize I forgot right after pressing enter on "do you really
> wanna send"..

Heh. No worries.

Johan