linux-kernel - Re: [PATCH 04/10] arm64: dts: qcom: sm8450: Update cpuidle states parameters

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Message-ID: <CAPDyKFrrajGPsH5=iqtB6PAuO6Y9C8_QfbF8yF2PKqrVuCmZ9g@mail.gmail.com>
Date:   Fri, 14 Jan 2022 13:30:38 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Maulik Shah <quic_mkshah@...cinc.com>
Cc:     bjorn.andersson@...aro.org, linux-arm-msm@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        rafael@...nel.org, daniel.lezcano@...aro.org,
        quic_lsrao@...cinc.com, quic_rjendra@...cinc.com,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 04/10] arm64: dts: qcom: sm8450: Update cpuidle states parameters

On Sun, 9 Jan 2022 at 18:25, Maulik Shah <quic_mkshah@...cinc.com> wrote:
>
> This change updates/corrects below cpuidle parameters
>
> 1. entry-latency, exit-latency and residency for various idle states.
> 2. arm,psci-suspend-param which is same for CLUSTER_SLEEP_0/1 states.
> 3. Add CLUSTER_SLEEP_1 in CLUSTER_PD.
>
> Cc: devicetree@...r.kernel.org
> Fixes: 5188049c9b36 ("arm64: dts: qcom: Add base SM8450 DTSI")
> Signed-off-by: Maulik Shah <quic_mkshah@...cinc.com>
> ---
>  arch/arm64/boot/dts/qcom/sm8450.dtsi | 28 ++++++++++++++--------------
>  1 file changed, 14 insertions(+), 14 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> index 10c25ad..5e329f8 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> @@ -203,9 +203,9 @@
>                                 compatible = "arm,idle-state";
>                                 idle-state-name = "silver-rail-power-collapse";
>                                 arm,psci-suspend-param = <0x40000004>;
> -                               entry-latency-us = <274>;
> -                               exit-latency-us = <480>;
> -                               min-residency-us = <3934>;
> +                               entry-latency-us = <800>;
> +                               exit-latency-us = <750>;
> +                               min-residency-us = <4090>;
>                                 local-timer-stop;
>                         };
>
> @@ -213,9 +213,9 @@
>                                 compatible = "arm,idle-state";
>                                 idle-state-name = "gold-rail-power-collapse";
>                                 arm,psci-suspend-param = <0x40000004>;
> -                               entry-latency-us = <327>;
> -                               exit-latency-us = <1502>;
> -                               min-residency-us = <4488>;
> +                               entry-latency-us = <600>;
> +                               exit-latency-us = <1550>;
> +                               min-residency-us = <4791>;
>                                 local-timer-stop;
>                         };
>                 };
> @@ -224,10 +224,10 @@
>                         CLUSTER_SLEEP_0: cluster-sleep-0 {
>                                 compatible = "domain-idle-state";
>                                 idle-state-name = "cluster-l3-off";
> -                               arm,psci-suspend-param = <0x4100c344>;
> -                               entry-latency-us = <584>;
> -                               exit-latency-us = <2332>;
> -                               min-residency-us = <6118>;
> +                               arm,psci-suspend-param = <0x41000044>;
> +                               entry-latency-us = <1050>;
> +                               exit-latency-us = <2500>;
> +                               min-residency-us = <5309>;
>                                 local-timer-stop;
>                         };
>
> @@ -235,9 +235,9 @@
>                                 compatible = "domain-idle-state";
>                                 idle-state-name = "cluster-power-collapse";
>                                 arm,psci-suspend-param = <0x4100c344>;
> -                               entry-latency-us = <2893>;
> -                               exit-latency-us = <4023>;
> -                               min-residency-us = <9987>;
> +                               entry-latency-us = <2700>;
> +                               exit-latency-us = <3500>;
> +                               min-residency-us = <13959>;
>                                 local-timer-stop;
>                         };
>                 };
> @@ -315,7 +315,7 @@
>
>                 CLUSTER_PD: cpu-cluster0 {
>                         #power-domain-cells = <0>;
> -                       domain-idle-states = <&CLUSTER_SLEEP_0>;
> +                       domain-idle-states = <&CLUSTER_SLEEP_0 &CLUSTER_SLEEP_1>;

Should this be like the below instead?

<&CLUSTER_SLEEP_0>,  <&CLUSTER_SLEEP_1>;

>                 };
>         };
>
> --
> 2.7.4
>

Other than the above, feel free to add:

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

Kind regards
Uffe