linux-kernel - [PATCH v3 2/5] arm64: dts: allwinner: h6: Add cooling map for GPU

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Date:   Mon,  5 Sep 2022 19:15:58 +0200
From:   Clément Péron <peron.clem@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Steven Price <steven.price@....com>,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Bjorn Andersson <andersson@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Arnd Bergmann <arnd@...db.de>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Vinod Koul <vkoul@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Biju Das <biju.das.jz@...renesas.com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        Clément Péron <peron.clem@...il.com>
Subject: [PATCH v3 2/5] arm64: dts: allwinner: h6: Add cooling map for GPU

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@...il.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..1259ab0c3956 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@...0000 {
 			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 {
+				// Fordid the GPU to go over 756MHz
+				map0 {
+					trip = <&gpu_alert0>;
+					cooling-device = <&gpu 1 THERMAL_NO_LIMIT>;
+				};
+
+				// Fordid the GPU to go over 624MHz
+				map1 {
+					trip = <&gpu_alert1>;
+					cooling-device = <&gpu 2 THERMAL_NO_LIMIT>;
+				};
+
+				// Fordid the GPU to go over 576MHz
+				map2 {
+					trip = <&gpu_alert2>;
+					cooling-device = <&gpu 3 THERMAL_NO_LIMIT>;
+				};
+			};
 		};
 	};
 };
-- 
2.34.1