linux-kernel - [PATCH] arm64: dts: qcom: sdm845: Fix wild reboot during Antutu test

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Date: Tue, 16 Jan 2024 12:59:20 +0100
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: andersson@...nel.org
Cc: Amit Pundir <amit.pundir@...aro.org>,
	Konrad Dybcio <konrad.dybcio@...aro.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 (open list:ARM/QUALCOMM SUPPORT),
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] arm64: dts: qcom: sdm845: Fix wild reboot during Antutu test

Running an Antutu benchmark makes the board to do a hard reboot.

Cause: it appears the gpu-bottom and gpu-top temperature sensors are showing
too high temperatures, above 115°C.

Out of tree configuratons show the gpu thermal zone is configured to
be mitigated at 85°C with devfreq.

Add the DT snippet to enable the thermal mitigation on the sdm845
based board.

Fixes: c79800103eb18 ("arm64: dts: sdm845: Add gpu and gmu device nodes")
Cc: Amit Pundir <amit.pundir@...aro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
 arch/arm64/boot/dts/qcom/sdm845.dtsi | 32 ++++++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index c2244824355a..20fefd6af0f8 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -4764,6 +4764,8 @@ gpu: gpu@...0000 {
 			interconnects = <&mem_noc MASTER_GFX3D 0 &mem_noc SLAVE_EBI1 0>;
 			interconnect-names = "gfx-mem";
 
+			#cooling-cells = <2>;
+
 			status = "disabled";
 
 			gpu_opp_table: opp-table {
@@ -5603,12 +5605,25 @@ gpu-top-thermal {
 			thermal-sensors = <&tsens0 11>;
 
 			trips {
-				gpu1_alert0: trip-point0 {
+                                gpu1_alert0: trip-point0 {
+                                        temperature = <85000>;
+                                        hysteresis = <2000>;
+                                        type = "passive";
+                                };
+
+				gpu1_alert1: trip-point1 {
 					temperature = <90000>;
 					hysteresis = <2000>;
 					type = "hot";
 				};
 			};
+
+			cooling-maps {
+				map0 {
+					trip = <&gpu1_alert0>;
+					cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
 		};
 
 		gpu-bottom-thermal {
@@ -5618,12 +5633,25 @@ gpu-bottom-thermal {
 			thermal-sensors = <&tsens0 12>;
 
 			trips {
-				gpu2_alert0: trip-point0 {
+                                gpu2_alert0: trip-point0 {
+                                        temperature = <85000>;
+                                        hysteresis = <2000>;
+                                        type = "passive";
+                                };
+
+				gpu2_alert1: trip-point1 {
 					temperature = <90000>;
 					hysteresis = <2000>;
 					type = "hot";
 				};
 			};
+
+			cooling-maps {
+ 				map0 {
+ 					trip = <&gpu2_alert0>;
+					cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+                                };
+                        };
 		};
 
 		aoss1-thermal {
-- 
2.34.1