From: Martin Kepplinger-Novaković Date: Thu, 8 May 2025 10:18:02 +0000 (+0000) Subject: arm64: dts: imx8mp: Enable gpu passive throttling X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=1a2ad59da68dd294f994efbf68c5d671f6b42fad;p=users%2Fjedix%2Flinux-maple.git arm64: dts: imx8mp: Enable gpu passive throttling Hook up the gpu as a passive cooling device to the thermal zones' alert trip point just like the cpu. The gpu here consists of 3D GPU, 2D GPU and NPU. One way to test would be to set one "alert" trip point low enough and watch the cooling device state increase: echo 10000 > /sys/class/thermal/thermal_zone0/trip_point_0_temp watch cat /sys/class/thermal/cooling_device*/cur_state And of course set the trip point back to its original value and watch the cooling device states jump to 0 again. Signed-off-by: Martin Kepplinger-Novaković Signed-off-by: Shawn Guo --- diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi index 948b88cf5e9df..66cb1ef49aca6 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi @@ -320,7 +320,10 @@ <&A53_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, <&A53_1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, <&A53_2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, - <&A53_3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; + <&A53_3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, + <&gpu3d THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, + <&gpu2d THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, + <&npu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; }; }; }; @@ -350,7 +353,10 @@ <&A53_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, <&A53_1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, <&A53_2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, - <&A53_3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; + <&A53_3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, + <&gpu3d THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, + <&gpu2d THERMAL_NO_LIMIT THERMAL_NO_LIMIT>, + <&npu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; }; }; }; @@ -2235,6 +2241,7 @@ <&clk IMX8MP_CLK_GPU_ROOT>, <&clk IMX8MP_CLK_GPU_AHB>; clock-names = "core", "shader", "bus", "reg"; + #cooling-cells = <2>; assigned-clocks = <&clk IMX8MP_CLK_GPU3D_CORE>, <&clk IMX8MP_CLK_GPU3D_SHADER_CORE>; assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_1000M>, @@ -2251,6 +2258,7 @@ <&clk IMX8MP_CLK_GPU_ROOT>, <&clk IMX8MP_CLK_GPU_AHB>; clock-names = "core", "bus", "reg"; + #cooling-cells = <2>; assigned-clocks = <&clk IMX8MP_CLK_GPU2D_CORE>; assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_1000M>; assigned-clock-rates = <1000000000>; @@ -2308,6 +2316,7 @@ <&clk IMX8MP_CLK_ML_AXI>, <&clk IMX8MP_CLK_ML_AHB>; clock-names = "core", "shader", "bus", "reg"; + #cooling-cells = <2>; power-domains = <&pgc_mlmix>; };