linux-kernel - [PATCH] dts: arm64: imx8mq: Enable gpu passive throttling

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Message-Id: <cf1b114bcc6ef26e032c352b8c885aaf5f3594d0.1568254197.git.agx@sigxcpu.org>
Date:   Wed, 11 Sep 2019 19:14:25 -0700
From:   Guido Günther <agx@...xcpu.org>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Abel Vesa <abel.vesa@....com>,
        Guido Günther <agx@...xcpu.org>,
        Anson Huang <Anson.Huang@....com>,
        Carlo Caione <ccaione@...libre.com>,
        "Angus Ainslie (Purism)" <angus@...ea.ca>,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] dts: arm64: imx8mq: Enable gpu passive throttling

Temperature and hysteresis were picked after the CPU.

Signed-off-by: Guido Günther <agx@...xcpu.org>
---
 arch/arm64/boot/dts/freescale/imx8mq.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index 564045927485..fda636085bb3 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -235,12 +235,26 @@
 			thermal-sensors = <&tmu 1>;
 
 			trips {
+				gpu-alert {
+					temperature = <80000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
 				gpu-crit {
 					temperature = <90000>;
 					hysteresis = <2000>;
 					type = "critical";
 				};
 			};
+
+			cooling-maps {
+				map0 {
+					trip = <&gpu_alert>;
+					cooling-device =
+						<&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
 		};
 
 		vpu-thermal {
@@ -1006,6 +1020,7 @@
 			         <&clk IMX8MQ_CLK_GPU_AXI>,
 			         <&clk IMX8MQ_CLK_GPU_AHB>;
 			clock-names = "core", "shader", "bus", "reg";
+			#cooling-cells = <2>;
 			assigned-clocks = <&clk IMX8MQ_CLK_GPU_CORE_SRC>,
 			                  <&clk IMX8MQ_CLK_GPU_SHADER_SRC>,
 			                  <&clk IMX8MQ_CLK_GPU_AXI>,
-- 
2.23.0.rc1