linux-kernel - [PATCH 10/12] arm64: dts: qcom: sm8450: Throttle the GPU when overheating

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Date: Fri, 10 May 2024 14:58:39 +0200
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Johan Hovold <johan+linaro@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Bjorn Andersson <quic_bjorande@...cinc.com>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH 10/12] arm64: dts: qcom: sm8450: Throttle the GPU when
 overheating

Add an 85C passive trip point to ensure the thermal framework takes
sufficient action to prevent reaching junction temperature and a
110C critical point to help avoid hw damage.

Remove the copypasta-from-downstream userspace governor entries while
at it.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 arch/arm64/boot/dts/qcom/sm8450.dtsi | 48 ++++++++++++++----------------------
 1 file changed, 18 insertions(+), 30 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
index ee60fd257efe..38e8d3e9dd43 100644
--- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
@@ -4928,28 +4928,22 @@ map0 {
 			};
 
 			trips {
-				thermal-engine-config {
-					temperature = <125000>;
+				gpu_top_alert0: trip-point0 {
+					temperature = <85000>;
 					hysteresis = <1000>;
 					type = "passive";
 				};
 
-				thermal-hal-config {
-					temperature = <125000>;
+				trip-point1 {
+					temperature = <90000>;
 					hysteresis = <1000>;
-					type = "passive";
-				};
-
-				reset-mon-cfg {
-					temperature = <115000>;
-					hysteresis = <5000>;
-					type = "passive";
+					type = "hot";
 				};
 
-				gpu_top_alert0: trip-point0 {
-					temperature = <95000>;
-					hysteresis = <5000>;
-					type = "passive";
+				trip-point2 {
+					temperature = <110000>;
+					hysteresis = <1000>;
+					type = "critical";
 				};
 			};
 		};
@@ -4967,28 +4961,22 @@ map0 {
 			};
 
 			trips {
-				thermal-engine-config {
-					temperature = <125000>;
+				gpu_bottom_alert0: trip-point0 {
+					temperature = <85000>;
 					hysteresis = <1000>;
 					type = "passive";
 				};
 
-				thermal-hal-config {
-					temperature = <125000>;
+				trip-point1 {
+					temperature = <90000>;
 					hysteresis = <1000>;
-					type = "passive";
-				};
-
-				reset-mon-cfg {
-					temperature = <115000>;
-					hysteresis = <5000>;
-					type = "passive";
+					type = "hot";
 				};
 
-				gpu_bottom_alert0: trip-point0 {
-					temperature = <95000>;
-					hysteresis = <5000>;
-					type = "passive";
+				trip-point2 {
+					temperature = <110000>;
+					hysteresis = <1000>;
+					type = "critical";
 				};
 			};
 		};

-- 
2.40.1