arm64: dts: qcom: sc8280xp: Throttle the GPU when overheating

Add an 85C passive trip point with 1C of hysteresis to ensure the
thermal framework takes sufficient action to prevent reaching junction
temperature. Also, add passive polling to ensure more than one
temperature change event is recorded.

Fixes: 014bbc990e27 ("arm64: dts: qcom: sc8280xp: Introduce additional tsens instances")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240510-topic-gpus_are_cool_now-v1-2-ababc269a438@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
index 82c601ef33693de7d1501d3453878e217afb002f..80a57aa228397e23e3e2d5643c0b563a60d71170 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -6004,10 +6004,25 @@
                };
 
                gpu-thermal {
+                       polling-delay-passive = <250>;
+
                        thermal-sensors = <&tsens2 2>;
 
+                       cooling-maps {
+                               map0 {
+                                       trip = <&gpu_alert0>;
+                                       cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+                               };
+                       };
+
                        trips {
-                               gpu-crit {
+                               gpu_alert0: trip-point0 {
+                                       temperature = <85000>;
+                                       hysteresis = <1000>;
+                                       type = "passive";
+                               };
+
+                               trip-point1 {
                                        temperature = <110000>;
                                        hysteresis = <1000>;
                                        type = "critical";