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

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Date:   Mon, 05 Sep 2022 19:23:13 +0200
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        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>,
        Clément Péron <peron.clem@...il.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: Re: [PATCH v3 2/5] arm64: dts: allwinner: h6: Add cooling map for GPU

Dne ponedeljek, 05. september 2022 ob 19:15:58 CEST je Clément Péron 
napisal(a):
> 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

Typo: Fordid -> Forbid

Also next below.

Best regards,
Jernej

> +				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