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

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Message-Id: <20250822-a663-gpu-support-v4-4-97d26bb2144e@oss.qualcomm.com>
Date: Fri, 22 Aug 2025 00:25:29 +0530
From: Akhil P Oommen <akhilpo@....qualcomm.com>
To: 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,
        Akhil P Oommen <akhilpo@....qualcomm.com>
Subject: [PATCH v4 4/6] arm64: dts: qcom: lemans: Add GPU cooling

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 {
 			polling-delay-passive = <10>;
 
 			thermal-sensors = <&tsens0 5>;
 
+			cooling-maps {
+				map0 {
+					trip = <&gpuss0_alert0>;
+					cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+
 			trips {
-				trip-point0 {
+				gpuss0_alert0: trip-point0 {
 					temperature = <105000>;
 					hysteresis = <5000>;
 					type = "passive";
@@ -6836,13 +6844,20 @@ trip-point1 {
 			};
 		};
 
-		gpuss-1-thermal {
+		gpuss1_thermal: gpuss-1-thermal {
 			polling-delay-passive = <10>;
 
 			thermal-sensors = <&tsens0 6>;
 
+			cooling-maps {
+				map0 {
+					trip = <&gpuss1_alert0>;
+					cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+
 			trips {
-				trip-point0 {
+				gpuss1_alert0: trip-point0 {
 					temperature = <105000>;
 					hysteresis = <5000>;
 					type = "passive";
@@ -6856,13 +6871,20 @@ trip-point1 {
 			};
 		};
 
-		gpuss-2-thermal {
+		gpuss2_thermal: gpuss-2-thermal {
 			polling-delay-passive = <10>;
 
 			thermal-sensors = <&tsens0 7>;
 
+			cooling-maps {
+				map0 {
+					trip = <&gpuss2_alert0>;
+					cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+
 			trips {
-				trip-point0 {
+				gpuss2_alert0: trip-point0 {
 					temperature = <105000>;
 					hysteresis = <5000>;
 					type = "passive";
@@ -7046,13 +7068,20 @@ trip-point1 {
 			};
 		};
 
-		gpuss-3-thermal {
+		gpuss3_thermal: gpuss-3-thermal {
 			polling-delay-passive = <10>;
 
 			thermal-sensors = <&tsens1 5>;
 
+			cooling-maps {
+				map0 {
+					trip = <&gpuss3_alert0>;
+					cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+
 			trips {
-				trip-point0 {
+				gpuss3_alert0: trip-point0 {
 					temperature = <105000>;
 					hysteresis = <5000>;
 					type = "passive";
@@ -7066,13 +7095,20 @@ trip-point1 {
 			};
 		};
 
-		gpuss-4-thermal {
+		gpuss4_thermal: gpuss-4-thermal {
 			polling-delay-passive = <10>;
 
 			thermal-sensors = <&tsens1 6>;
 
+			cooling-maps {
+				map0 {
+					trip = <&gpuss4_alert0>;
+					cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+
 			trips {
-				trip-point0 {
+				gpuss4_alert0: trip-point0 {
 					temperature = <105000>;
 					hysteresis = <5000>;
 					type = "passive";
@@ -7086,13 +7122,20 @@ trip-point1 {
 			};
 		};
 
-		gpuss-5-thermal {
+		gpuss5_thermal: gpuss-5-thermal {
 			polling-delay-passive = <10>;
 
 			thermal-sensors = <&tsens1 7>;
 
+			cooling-maps {
+				map0 {
+					trip = <&gpuss5_alert0>;
+					cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+
 			trips {
-				trip-point0 {
+				gpuss5_alert0: trip-point0 {
 					temperature = <105000>;
 					hysteresis = <5000>;
 					type = "passive";

-- 
2.50.1