linux-kernel - Re: [PATCH] arm64: dts: qcom: sc8280xp: Flush RSC sleep & wake votes

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Date:   Sat, 13 May 2023 11:09:07 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bjorn Andersson <quic_bjorande@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sc8280xp: Flush RSC sleep & wake votes



On 12.05.2023 17:04, Bjorn Andersson wrote:
> The rpmh driver will cache sleep and wake votes until the cluster
> power-domain is about to enter idle, to avoid unnecessary writes. So
> associate the apps_rsc with the cluster pd, so that it can be notified
> about this event.
> 
> Without this, only AMC votes are being commited.
Ouch.

Should we make this required: in bindings and add it to all
platforms?

> 
> Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Fixes: 152d1faf1e2f ("arm64: dts: qcom: add SC8280XP platform")

Konrad
>  arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> index 8fa9fbfe5d00..5c68f2182c2f 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> @@ -3982,6 +3982,7 @@ apps_rsc: rsc@...00000 {
>  			qcom,tcs-config = <ACTIVE_TCS  2>, <SLEEP_TCS   3>,
>  					  <WAKE_TCS    3>, <CONTROL_TCS 1>;
>  			label = "apps_rsc";
> +			power-domains = <&CLUSTER_PD>;
>  
>  			apps_bcm_voter: bcm-voter {
>  				compatible = "qcom,bcm-voter";