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Message-ID: <fc414f61-34a8-acb0-29d4-971a873562e5@linaro.org>
Date:   Thu, 27 Apr 2023 15:27:47 +0200
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Reply-To: neil.armstrong@linaro.org
Subject: Re: [PATCH 6/7] arm64: dts: qcom: sc8280xp-crd: Add QMP to SuperSpeed
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Content-Language: en-US
To:     Konrad Dybcio <konrad.dybcio@linaro.org>,
        Bjorn Andersson <quic_bjorande@quicinc.com>,
        Bjorn Andersson <andersson@kernel.org>,
        Johan Hovold <johan@kernel.org>
Cc:     Vinod Koul <vkoul@kernel.org>,
        Kishon Vijay Abraham I <kishon@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20230425034010.3789376-1-quic_bjorande@quicinc.com>
 <20230425034010.3789376-7-quic_bjorande@quicinc.com>
 <aa94b488-cb6e-bd74-0711-b7c4c7589f7a@linaro.org>
From:   Neil Armstrong <neil.armstrong@linaro.org>
Organization: Linaro Developer Services
In-Reply-To: <aa94b488-cb6e-bd74-0711-b7c4c7589f7a@linaro.org>
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Precedence: bulk

On 27/04/2023 01:33, Konrad Dybcio wrote:
> 
> On 4/25/23 04:40, Bjorn Andersson wrote:
>> With support for the QMP combo phy to react to USB Type-C switch events,
>> introduce it as the next hop for the SuperSpeed lanes of the two USB
>> Type-C connectors, and connect the output of the DisplayPort controller
>> to the QMP combo phy.
>>
>> This allows the TCPM to perform orientation switching of both USB and
>> DisplayPort signals.
>>
>> Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
>> ---
>>   arch/arm64/boot/dts/qcom/sc8280xp-crd.dts | 28 ++++++++++++++++---
>>   arch/arm64/boot/dts/qcom/sc8280xp.dtsi    | 34 +++++++++++++++++++++++
>>   2 files changed, 58 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
>> index 547277924ea3..33c973661fa5 100644
>> --- a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
>> +++ b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
>> @@ -64,7 +64,7 @@ port@1 {
>>                       reg = <1>;
>>                       pmic_glink_con0_ss: endpoint {
>> -                        remote-endpoint = <&mdss0_dp0_out>;
>> +                        remote-endpoint = <&usb_0_qmpphy_out>;
>>                       };
>>                   };
>> @@ -99,7 +99,7 @@ port@1 {
>>                       reg = <1>;
>>                       pmic_glink_con1_ss: endpoint {
>> -                        remote-endpoint = <&mdss0_dp1_out>;
>> +                        remote-endpoint = <&usb_1_qmpphy_out>;
>>                       };
>>                   };
>> @@ -412,7 +412,7 @@ &mdss0_dp0 {
>>   &mdss0_dp0_out {
>>       data-lanes = <0 1>;
>> -    remote-endpoint = <&pmic_glink_con0_ss>;
>> +    remote-endpoint = <&usb_0_qmpphy_dp_in>;
>>   };
>>   &mdss0_dp1 {
>> @@ -421,7 +421,7 @@ &mdss0_dp1 {
>>   &mdss0_dp1_out {
>>       data-lanes = <0 1>;
>> -    remote-endpoint = <&pmic_glink_con1_ss>;
>> +    remote-endpoint = <&usb_1_qmpphy_dp_in>;
>>   };
>>   &mdss0_dp3 {
>> @@ -670,9 +670,19 @@ &usb_0_qmpphy {
>>       vdda-phy-supply = <&vreg_l9d>;
>>       vdda-pll-supply = <&vreg_l4d>;
>> +    orientation-switch;
> 
> I believe this belongs in the SoC DTSI, as it's supported by
> the PHY block itself
> 
> 
> The rest seems to lgtm..
> 
> 
> On a note, why did we end up placing pmic_glink in device
> DTs? It's already assumed that we're using the full Qualcomm
> stack as we use PAS for remoteprocs so I *think* we can always
> assume pmic_glink would be there!

As we did on other board, I think because having pmic_glink depends
on the board firmware capabilities ? Boards without USB-C won't need/have
pmic_link right ?

Neil

> 
> Konrad
> 
>> +
>>       status = "okay";
>>   };
>> +&usb_0_qmpphy_dp_in {
>> +    remote-endpoint = <&mdss0_dp0_out>;
>> +};
>> +
>> +&usb_0_qmpphy_out {
>> +    remote-endpoint = <&pmic_glink_con0_ss>;
>> +};
>> +
>>   &usb_0_role_switch {
>>       remote-endpoint = <&pmic_glink_con0_hs>;
>>   };
>> @@ -697,9 +707,19 @@ &usb_1_qmpphy {
>>       vdda-phy-supply = <&vreg_l4b>;
>>       vdda-pll-supply = <&vreg_l3b>;
>> +    orientation-switch;
>> +
>>       status = "okay";
>>   };
>> +&usb_1_qmpphy_dp_in {
>> +    remote-endpoint = <&mdss0_dp1_out>;
>> +};
>> +
>> +&usb_1_qmpphy_out {
>> +    remote-endpoint = <&pmic_glink_con1_ss>;
>> +};
>> +
>>   &usb_1_role_switch {
>>       remote-endpoint = <&pmic_glink_con1_hs>;
>>   };
>> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
>> index 0e691bb0120c..1eb3a295e8fa 100644
>> --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
>> @@ -3006,6 +3006,23 @@ usb_0_qmpphy: phy@88eb000 {
>>               #phy-cells = <1>;
>>               status = "disabled";
>> +
>> +            ports {
>> +                #address-cells = <1>;
>> +                #size-cells = <0>;
>> +
>> +                port@0 {
>> +                    reg = <0>;
>> +
>> +                    usb_0_qmpphy_out: endpoint {};
>> +                };
>> +
>> +                port@1 {
>> +                    reg = <1>;
>> +
>> +                    usb_0_qmpphy_dp_in: endpoint {};
>> +                };
>> +            };
>>           };
>>           usb_1_hsphy: phy@8902000 {
>> @@ -3042,6 +3059,23 @@ usb_1_qmpphy: phy@8903000 {
>>               #phy-cells = <1>;
>>               status = "disabled";
>> +
>> +            ports {
>> +                #address-cells = <1>;
>> +                #size-cells = <0>;
>> +
>> +                port@0 {
>> +                    reg = <0>;
>> +
>> +                    usb_1_qmpphy_out: endpoint {};
>> +                };
>> +
>> +                port@1 {
>> +                    reg = <1>;
>> +
>> +                    usb_1_qmpphy_dp_in: endpoint {};
>> +                };
>> +            };
>>           };
>>           mdss1_dp0_phy: phy@8909a00 {