[PATCH v5 6/7] arm64: dts: qcom: shikra: Add GPU cooling

[Akhil P Oommen]

From: Aastha Pandey <aastha.pandey at oss.qualcomm.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 115°C. And
use a passive polling delay to ensure more than one "passive" thermal
point is considered when throttling the GPU thermal zones.

Signed-off-by: Aastha Pandey <aastha.pandey at oss.qualcomm.com>
Signed-off-by: Akhil P Oommen <akhilpo at oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/shikra.dtsi | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/shikra.dtsi b/arch/arm64/boot/dts/qcom/shikra.dtsi
index 34261221664b..eeeaa369d3a7 100644
--- a/arch/arm64/boot/dts/qcom/shikra.dtsi
+++ b/arch/arm64/boot/dts/qcom/shikra.dtsi
@@ -2510,6 +2510,7 @@ cpuss0-critical {
 		};
 
 		gpuss-thermal {
+			polling-delay-passive = <10>;
 			thermal-sensors = <&tsens0 6>;
 
 			trips {
@@ -2519,12 +2520,25 @@ trip-point0 {
 					type = "hot";
 				};
 
-				gpuss-critical {
+				gpuss_alert0: gpuss-alert0 {
 					temperature = <115000>;
+					hysteresis = <5000>;
+					type = "passive";
+				};
+
+				gpuss-critical {
+					temperature = <120000>;
 					hysteresis = <0>;
 					type = "critical";
 				};
 			};
+
+			cooling-maps {
+				map0 {
+					trip = <&gpuss_alert0>;
+					cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
 		};
 
 		nsp-thermal {

-- 
2.54.0