linux-kernel - Re: [PATCH] arm64: dts: mt8183: adjust cpuidle target residency

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Message-ID: <e8c4314a-466e-8ba4-d5ea-d50eab7a709b@gmail.com>
Date:   Mon, 13 Apr 2020 18:57:13 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Ikjoon Jang <ikjn@...omium.org>,
        linux-mediatek@...ts.infradead.org,
        James Liao <jamesjj.liao@...iatek.com>
Cc:     Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        hsinyi@...omium.org, drinkcat@...omium.org
Subject: Re: [PATCH] arm64: dts: mt8183: adjust cpuidle target residency



On 2/25/20 9:07 AM, Ikjoon Jang wrote:
> Split a cluster level cpuidle state into two, so mt8183 variant
> boards can adjust parameters for each cluster, and reduce cluster0's
> default target residency to 1000us as power measurements showed that
> its minimum residency is slightly less than cluster1's 1300us.
> 
> Signed-off-by: Ikjoon Jang <ikjn@...omium.org>

Applied to v5.7-next/dts64

Thanks!

> ---
>  arch/arm64/boot/dts/mediatek/mt8183.dtsi | 26 ++++++++++++++++--------
>  1 file changed, 17 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> index f1381e77918b..5c7dd262eaf3 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> @@ -74,7 +74,7 @@ cpu0: cpu@0 {
>  			reg = <0x000>;
>  			enable-method = "psci";
>  			capacity-dmips-mhz = <741>;
> -			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>;
> +			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP0>;
>  		};
>  
>  		cpu1: cpu@1 {
> @@ -83,7 +83,7 @@ cpu1: cpu@1 {
>  			reg = <0x001>;
>  			enable-method = "psci";
>  			capacity-dmips-mhz = <741>;
> -			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>;
> +			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP0>;
>  		};
>  
>  		cpu2: cpu@2 {
> @@ -92,7 +92,7 @@ cpu2: cpu@2 {
>  			reg = <0x002>;
>  			enable-method = "psci";
>  			capacity-dmips-mhz = <741>;
> -			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>;
> +			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP0>;
>  		};
>  
>  		cpu3: cpu@3 {
> @@ -101,7 +101,7 @@ cpu3: cpu@3 {
>  			reg = <0x003>;
>  			enable-method = "psci";
>  			capacity-dmips-mhz = <741>;
> -			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>;
> +			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP0>;
>  		};
>  
>  		cpu4: cpu@100 {
> @@ -110,7 +110,7 @@ cpu4: cpu@100 {
>  			reg = <0x100>;
>  			enable-method = "psci";
>  			capacity-dmips-mhz = <1024>;
> -			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>;
> +			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP1>;
>  		};
>  
>  		cpu5: cpu@101 {
> @@ -119,7 +119,7 @@ cpu5: cpu@101 {
>  			reg = <0x101>;
>  			enable-method = "psci";
>  			capacity-dmips-mhz = <1024>;
> -			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>;
> +			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP1>;
>  		};
>  
>  		cpu6: cpu@102 {
> @@ -128,7 +128,7 @@ cpu6: cpu@102 {
>  			reg = <0x102>;
>  			enable-method = "psci";
>  			capacity-dmips-mhz = <1024>;
> -			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>;
> +			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP1>;
>  		};
>  
>  		cpu7: cpu@103 {
> @@ -137,7 +137,7 @@ cpu7: cpu@103 {
>  			reg = <0x103>;
>  			enable-method = "psci";
>  			capacity-dmips-mhz = <1024>;
> -			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>;
> +			cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP1>;
>  		};
>  
>  		idle-states {
> @@ -152,7 +152,15 @@ CPU_SLEEP: cpu-sleep {
>  				min-residency-us = <800>;
>  			};
>  
> -			CLUSTER_SLEEP: cluster-sleep {
> +			CLUSTER_SLEEP0: cluster-sleep@0 {
> +				compatible = "arm,idle-state";
> +				local-timer-stop;
> +				arm,psci-suspend-param = <0x01010001>;
> +				entry-latency-us = <250>;
> +				exit-latency-us = <400>;
> +				min-residency-us = <1000>;
> +			};
> +			CLUSTER_SLEEP1: cluster-sleep@1 {
>  				compatible = "arm,idle-state";
>  				local-timer-stop;
>  				arm,psci-suspend-param = <0x01010001>;
>