linux-kernel - Re: [PATCH v4 4/6] arm64: dts: qcom: lemans: Add GPU cooling

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Message-ID: <4ac0ff3d-38db-44cc-9e36-44f9e819e96d@oss.qualcomm.com>
Date: Wed, 3 Sep 2025 14:18:08 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Akhil P Oommen <akhilpo@....qualcomm.com>, Sean Paul <sean@...rly.run>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Connor Abbott <cwabbott0@...il.com>,
        Srinivas Kandagatla <srini@...nel.org>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>
Cc: Gaurav Kohli <quic_gkohli@...cinc.com>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v4 4/6] arm64: dts: qcom: lemans: Add GPU cooling

On 8/21/25 8:55 PM, Akhil P Oommen wrote:
> From: Gaurav Kohli <quic_gkohli@...cinc.com>
> 
> Unlike the CPU, the GPU does not throttle its speed automatically when it
> reaches high temperatures.
> 
> Set up GPU cooling by throttling the GPU speed
> when reaching 105°C.
> 
> Signed-off-by: Gaurav Kohli <quic_gkohli@...cinc.com>
> Signed-off-by: Akhil P Oommen <akhilpo@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/lemans.dtsi | 67 +++++++++++++++++++++++++++++-------
>  1 file changed, 55 insertions(+), 12 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/lemans.dtsi b/arch/arm64/boot/dts/qcom/lemans.dtsi
> index 8eac8d4719db9230105ad93ac22287850b6b007c..b5d4d07b2fd9c14a6f1cc462c695e864394cade2 100644
> --- a/arch/arm64/boot/dts/qcom/lemans.dtsi
> +++ b/arch/arm64/boot/dts/qcom/lemans.dtsi
> @@ -20,6 +20,7 @@
>  #include <dt-bindings/power/qcom,rpmhpd.h>
>  #include <dt-bindings/power/qcom-rpmpd.h>
>  #include <dt-bindings/soc/qcom,rpmh-rsc.h>
> +#include <dt-bindings/thermal/thermal.h>
>  
>  / {
>  	interrupt-parent = <&intc>;
> @@ -6816,13 +6817,20 @@ trip-point1 {
>  			};
>  		};
>  
> -		gpuss-0-thermal {
> +		gpuss0_thermal: gpuss-0-thermal {

You don't need labels for the thermal zones, just the trip points below

Konrad