linux-kernel - Re: [PATCH v4 2/4] arm64: dts: qcom: sc8280xp-crd: Introduce pmic

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Date:   Wed, 15 Feb 2023 10:47:40 +0100
From:   Johan Hovold <johan@...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>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 2/4] arm64: dts: qcom: sc8280xp-crd: Introduce
 pmic_glink

On Mon, Feb 13, 2023 at 01:56:17PM -0800, Bjorn Andersson wrote:
> From: Bjorn Andersson <bjorn.andersson@...aro.org>
> 
> The SC8280XP CRD control over battery management and its two USB Type-C
> port using pmic_glink and two GPIO-based SBU muxes.
> 
> Enable the two DisplayPort instances, GPIO SBU mux instance and
> pmic_glink with the two connectors on the CRD.
> 
> Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
> ---
> 
> Changes since v3:
> - Moved data-lanes into dp/port/endpoint
> - Moved dp/port/endpoint definition to sc8280xp.dtsi, and reference by
>   label - to avoid repeating structure in the dts
> 
>  arch/arm64/boot/dts/qcom/sc8280xp-crd.dts | 196 +++++++++++++++++++++-
>  arch/arm64/boot/dts/qcom/sc8280xp.dtsi    |  17 ++
>  2 files changed, 211 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> index 2179c06b4e3b..98a0f1f9f01e 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> @@ -36,6 +36,84 @@ chosen {
>  		stdout-path = "serial0:115200n8";
>  	};
>  
> +	pmic-glink {
> +		compatible = "qcom,sc8280xp-pmic-glink", "qcom,pmic-glink";
> +
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		connector@0 {
> +			compatible = "usb-c-connector";
> +			reg = <0>;
> +			power-role = "dual";
> +			data-role = "dual";
> +
> +			ports {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				port@0 {
> +					reg = <0>;
> +
> +					pmic_glink_con0_hs: endpoint {
> +						remote-endpoint = <&usb_0_role_switch>;
> +					};
> +				};
> +
> +				port@1 {
> +					reg = <1>;
> +
> +					pmic_glink_con0_ss: endpoint {
> +						remote-endpoint = <&mdss0_dp0_out>;
> +					};
> +				};
> +
> +				port@2 {
> +					reg = <2>;
> +
> +					pmic_glink_con0_sbu: endpoint {
> +						remote-endpoint = <&usb0_sbu_mux>;
> +					};
> +				};
> +			};
> +		};
> +
> +		connector@1 {
> +			compatible = "usb-c-connector";
> +			reg = <1>;
> +			power-role = "dual";
> +			data-role = "dual";
> +
> +			ports {
> +				#address-cells = <1>;
> +				#size-cells = <0>;

Nit: add a newline for consistency

> +				port@0 {
> +					reg = <0>;
> +
> +					pmic_glink_con1_hs: endpoint {
> +						remote-endpoint = <&usb_1_role_switch>;
> +					};
> +				};
> +
> +				port@1 {
> +					reg = <1>;
> +
> +					pmic_glink_con1_ss: endpoint {
> +						remote-endpoint = <&mdss0_dp1_out>;
> +					};
> +				};
> +
> +				port@2 {
> +					reg = <2>;
> +
> +					pmic_glink_con1_sbu: endpoint {
> +						remote-endpoint = <&usb1_sbu_mux>;
> +					};
> +				};
> +			};
> +		};
> +	};
> +
>  	vreg_edp_3p3: regulator-edp-3p3 {
>  		compatible = "regulator-fixed";
  
> @@ -262,6 +380,24 @@ &mdss0 {
>  	status = "okay";
>  };
>  
> +&mdss0_dp0 {
> +	status = "okay";
> +};
> +
> +&mdss0_dp0_out {
> +	data-lanes = <0 1>;

This does not work as the drm driver expects 'data-lanes' to be defined
in the controller node where you had it in the previous versions:

	[    6.669325] [drm] Invalid property "data-lanes", default max DP lanes = 4

Moving it to the endpoint nodes would require updating both binding and
driver it seems.

> +	remote-endpoint = <&pmic_glink_con0_ss>;
> +};
> +
> +&mdss0_dp1 {
> +	status = "okay";
> +};
> +
> +&mdss0_dp1_out {
> +	data-lanes = <0 1>;

Same here (and for X13s).

> +	remote-endpoint = <&pmic_glink_con1_ss>;
> +};
> +
>  &mdss0_dp3 {
>  	compatible = "qcom,sc8280xp-edp";
>  	/delete-property/ #sound-dai-cells;

Johan