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

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Date:   Mon, 15 May 2023 10:06:31 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Bjorn Andersson <quic_bjorande@...cinc.com>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        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 Fri, May 12, 2023 at 08:04:25AM -0700, 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.
> 
> Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>

It still didn't fix the BCM vote issue I'm seeing on the CRD but that might be
due to RPMh resources not entering sleep mode to apply the sleep vote flushed
with the help of this patch.

Acked-by: Manivannan Sadhasivam <mani@...nel.org>

- Mani

> ---
>  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";
> -- 
> 2.25.1
> 

-- 
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