Messages in this thread | | | From | Chen-Yu Tsai <> | Date | Mon, 27 Nov 2023 18:02:06 +0800 | Subject | Re: [PATCH] arm64: dts: rockchip: Add dynamic-power-coefficient to rk3399 GPU |
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On Mon, Nov 27, 2023 at 4:14 PM Lukasz Luba <lukasz.luba@arm.com> wrote: > > Add dynamic-power-coefficient to the GPU node. That will create Energy > Model for the GPU based on the coefficient and OPP table information. > It will enable mechanism such as DTMP or IPA to work with the GPU DVFS. > In similar way the Energy Model for CPUs in rk3399 is created, so both > are aligned in power scale. The maximum power used from this coefficient > is 1.5W at 600MHz. > > Signed-off-by: Lukasz Luba <lukasz.luba@arm.com> > --- > arch/arm64/boot/dts/rockchip/rk3399.dtsi | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi > index 9da0b6d77c8d..87cfdf570b19 100644 > --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi > +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi > @@ -2113,6 +2113,7 @@ gpu: gpu@ff9a0000 { > interrupt-names = "job", "mmu", "gpu"; > clocks = <&cru ACLK_GPU>; > #cooling-cells = <2>; > + dynamic-power-coefficient = <2640>;
For reference, in the ChromeOS downstrean v5.10 kernel we have:
gpu_power_model: power_model { compatible = "arm,mali-simple-power-model"; static-coefficient = <411522>; dynamic-coefficient = <977>; ts = <32000 4700 (-80) 2>; thermal-zone = "gpu"; };
This is for the Mali kbase.
ChenYu
> power-domains = <&power RK3399_PD_GPU>; > status = "disabled"; > }; > -- > 2.25.1 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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