linux-kernel - Re: [PATCH v3 15/18] arm64: dts: qcom: Add MXC power domain to videocc node on SM8650

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Message-ID: <12986cda-99eb-4a1b-a97b-544ea01e2dbb@oss.qualcomm.com>
Date: Tue, 1 Apr 2025 17:27:06 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Jagadeesh Kona <quic_jkona@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd
 <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
        Dmitry Baryshkov <lumag@...nel.org>
Cc: Ajit Pandey <quic_ajipan@...cinc.com>,
        Imran Shaik <quic_imrashai@...cinc.com>,
        Taniya Das <quic_tdas@...cinc.com>,
        Satya Priya Kakitapalli <quic_skakitap@...cinc.com>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: Re: [PATCH v3 15/18] arm64: dts: qcom: Add MXC power domain to
 videocc node on SM8650

On 3/27/25 10:52 AM, Jagadeesh Kona wrote:
> Videocc requires both MMCX and MXC rails to be powered ON to configure
> the video PLLs on SM8650 platform. Hence add MXC power domain to videocc
> node on SM8650.
> 
> Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
> ---
>  arch/arm64/boot/dts/qcom/sm8650.dtsi | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8650.dtsi b/arch/arm64/boot/dts/qcom/sm8650.dtsi
> index 818db6ba3b3be99c187512ea4acf2004422f6a18..ad60596b71d25bb0198b26660dc41195a1210a23 100644
> --- a/arch/arm64/boot/dts/qcom/sm8650.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8650.dtsi
> @@ -4959,7 +4959,8 @@ videocc: clock-controller@...0000 {
>  			reg = <0 0x0aaf0000 0 0x10000>;
>  			clocks = <&bi_tcxo_div2>,
>  				 <&gcc GCC_VIDEO_AHB_CLK>;
> -			power-domains = <&rpmhpd RPMHPD_MMCX>;
> +			power-domains = <&rpmhpd RPMHPD_MMCX>,
> +					<&rpmhpd RPMHPD_MXC>;

So all other DTs touched in this series reference low_svs in required-opps

Is that an actual requirement? Otherwise since Commit e3e56c050ab6
("soc: qcom: rpmhpd: Make power_on actually enable the domain") we get the
first nonzero state, which can be something like low_svs_d2

Konrad