linux-kernel - Re: [PATCH v6 1/4] arm64: dts: qcom: add data-lanes and link-freuencies into dp

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Date:   Thu, 1 Dec 2022 09:34:12 -0800
From:   Kuogee Hsieh <quic_khsieh@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        <dri-devel@...ts.freedesktop.org>, <robdclark@...il.com>,
        <sean@...rly.run>, <swboyd@...omium.org>, <dianders@...omium.org>,
        <vkoul@...nel.org>, <daniel@...ll.ch>, <airlied@...ux.ie>,
        <agross@...nel.org>, <bjorn.andersson@...aro.org>
CC:     <quic_abhinavk@...cinc.com>, <quic_sbillaka@...cinc.com>,
        <freedreno@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 1/4] arm64: dts: qcom: add data-lanes and
 link-freuencies into dp_out endpoint


On 11/30/2022 4:07 PM, Dmitry Baryshkov wrote:
> On 01/12/2022 01:51, Kuogee Hsieh wrote:
>> Move data-lanes property from mdss_dp node to dp_out endpoint. Also
>> add link-frequencies property into dp_out endpoint as well. The last
>> frequency specified at link-frequencies will be the max link rate
>> supported by DP.
>>
>> Changes in v5:
>> -- revert changes at sc7180.dtsi and sc7280.dtsi
>> -- add &dp_out to sc7180-trogdor.dtsi and sc7280-herobrine.dtsi
>>
>> Changes in v6:
>> -- add data-lanes and link-frequencies to yaml
>>
>> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
>> ---
>>   .../devicetree/bindings/display/msm/dp-controller.yaml  | 17 
>> +++++++++++++++++
>
> Separate patch. Also you didn't check the get_maintainers output, so 
> required parties were not included into the distribution.
>
> Also as you'd check the get_maintainers output, please fix other email 
> addresses too.
>
>> arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi            |  6 +++++-
>>   arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi          |  6 +++++-
>>   3 files changed, 27 insertions(+), 2 deletions(-)
>>
>> diff --git 
>> a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml 
>> b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
>> index 94bc6e1..af70343 100644
>> --- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
>> +++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
>> @@ -90,6 +90,20 @@ properties:
>>           $ref: /schemas/graph.yaml#/properties/port
>>           description: Output endpoint of the controller
>>   +        properties:
>> +          endpoint:
>> +            $ref: /schemas/media/video-interfaces.yaml#
>> +
>> +          properties:
>> +            link-frequencies: true
>> +            data-lanes: true
>
> No. Use $ref for both of them.
>
>> +
>> +          required:
>> +            - link-frequencies
>> +            - data-lanes
>
> No, they are not required.
>
>> +
>> +          additionalProperties: false
>> +
>
> deprecation of old data-lanes property?
there is no old data-lanes property.
>
>>   required:
>>     - compatible
>>     - reg
>> @@ -158,6 +172,9 @@ examples:
>>                   reg = <1>;
>>                   endpoint {
>>                       remote-endpoint = <&typec>;
>> +                    data-lanes = <1 2>;
>> +                    link-frequencies = /bits/ 64 <160000000 270000000
>> +                                                  540000000 810000000>;
>
> I guess the number of zeroes is wrong here. This is 160 MHz ... 810 
> Mhz, rather than 1.6 GHz ... 8.1 GHz
>
>>                   };
>>               };
>>           };
>> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi 
>> b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
>> index 754d2d6..39f0844 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
>> @@ -812,7 +812,11 @@ hp_i2c: &i2c9 {
>>       status = "okay";
>>       pinctrl-names = "default";
>>       pinctrl-0 = <&dp_hot_plug_det>;
>> -    data-lanes = <0 1>;
>> +};
>> +
>> +&dp_out {
>> +    data-lanes = <0  1>;
>> +    link-frequencies = /bits/ 64 <160000000 270000000 540000000>;
>
> Same comment here.
>
>>   };
>>     &pm6150_adc {
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi 
>> b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
>> index 93e39fc..b7c343d 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
>> @@ -440,7 +440,11 @@ ap_i2c_tpm: &i2c14 {
>>       status = "okay";
>>       pinctrl-names = "default";
>>       pinctrl-0 = <&dp_hot_plug_det>;
>> -    data-lanes = <0 1>;
>> +};
>> +
>> +&dp_out {
>> +    data-lanes = <0  1>;
>> +    link-frequencies = /bits/ 64 <160000000 270000000 540000000 
>> 810000000>;
>
> And here.
>
>>   };
>>     &mdss_mdp {
>