linux-kernel - Re: [PATCH v2 3/4] arm64: dts: qcom: sdm845: Add the RPMh stats node

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Message-ID: <e6821eef-4fcb-97b1-24be-e2bb62b99039@linaro.org>
Date:   Mon, 15 Aug 2022 21:34:07 +0100
From:   Caleb Connolly <caleb.connolly@...aro.org>
To:     Abel Vesa <abel.vesa@...aro.org>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Maulik Shah <quic_mkshah@...cinc.com>
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/4] arm64: dts: qcom: sdm845: Add the RPMh stats node



On 12/08/2022 11:12, Abel Vesa wrote:
> SDM845 is a special case compared to the other platforms that use RPMh
> stats, since it only has 2 stats (aosd and cxsd), while the others have
> a 3rd one (ddr).
> 
> So lets add the node but with a SDM845 dedicated compatible to make
> the driver aware of the different stats config.
Hi,

I gave this a go on the OnePlus 6, I noticed the driver is also meant to read 
the stats for remote procs via smem, however this seems to fail for me - it 
can't find any of the SMEM items even if I probe the driver manually after 
ensuring remoteprocs have booted. Is this an unsupported feature on SDM845?
> 
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> ---
> 
> Changed qcom,rpmh-stats-sdm845 to qcom,sdm845-rpmh-stats, as suggested
> by Krzysztof.
> 
>   arch/arm64/boot/dts/qcom/sdm845.dtsi | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> index 5bea96a9ce06..67fe08b837be 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> @@ -4851,6 +4851,11 @@ ebi_cdev: ebi {
>   			};
>   		};
> 
> +		sram@...0000 {
> +			compatible = "qcom,sdm845-rpmh-stats";
> +			reg = <0 0x0c3f0000 0 0x400>;
> +		};
> +
>   		spmi_bus: spmi@...0000 {
>   			compatible = "qcom,spmi-pmic-arb";
>   			reg = <0 0x0c440000 0 0x1100>,
> --
> 2.34.1
> 

-- 
Kind Regards,
Caleb (they/he)