[PATCH v4 2/5] arm64: dts: allwinner: h6: Add cooling map for GPU

Clément Péron
2022-09-06T16:07:57Z

Add a simple cooling map for the GPU.

This cooling map come from the vendor kernel 4.9 with a
2°C hysteresis added.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 51 +++++++++++++++++++-
1 file changed, 49 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
index 5a28303d3d4c..53f6660656ac 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
@@ -186,6 +186,7 @@ gpu: gpu@1800000 {
clocks = <&ccu CLK_GPU>, <&ccu CLK_BUS_GPU>;
clock-names = "core", "bus";
resets = <&ccu RST_BUS_GPU>;
+ #cooling-cells = <2>;
status = "disabled";
};

@@ -1072,9 +1073,55 @@ map0 {
};

gpu-thermal {
- polling-delay-passive = <0>;
- polling-delay = <0>;
+ polling-delay-passive = <1000>;
+ polling-delay = <2000>;
thermal-sensors = <&ths 1>;
+
+ trips {
+ gpu_alert0: gpu-alert-0 {
+ temperature = <95000>;
+ hysteresis = <2000>;
+ type = "passive";
+ };
+
+ gpu_alert1: gpu-alert-1 {
+ temperature = <100000>;
+ hysteresis = <2000>;
+ type = "passive";
+ };
+
+ gpu_alert2: gpu-alert-2 {
+ temperature = <105000>;
+ hysteresis = <2000>;
+ type = "passive";
+ };
+
+ gpu-crit {
+ temperature = <115000>;
+ hysteresis = <0>;
+ type = "critical";
+ };
+ };
+
+ cooling-maps {
+ // Forbid the GPU to go over 756MHz
+ map0 {
+ trip = <&gpu_alert0>;
+ cooling-device = <&gpu 1 THERMAL_NO_LIMIT>;
+ };
+
+ // Forbid the GPU to go over 624MHz
+ map1 {
+ trip = <&gpu_alert1>;
+ cooling-device = <&gpu 2 THERMAL_NO_LIMIT>;
+ };
+
+ // Forbid the GPU to go over 576MHz
+ map2 {
+ trip = <&gpu_alert2>;
+ cooling-device = <&gpu 3 THERMAL_NO_LIMIT>;
+ };
+ };
};
};
};
--
2.34.1