linux-kernel - Re: [PATCH v14 1/5] arm64: dts: qcom: add data-lanes and link-freuencies into dp

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Message-ID: <4d00cf12-917b-32ba-5293-2337c21f1a0f@linaro.org>
Date:   Fri, 23 Dec 2022 12:50:02 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        dri-devel@...ts.freedesktop.org, robdclark@...il.com,
        sean@...rly.run, swboyd@...omium.org, dianders@...omium.org,
        vkoul@...nel.org, daniel@...ll.ch, agross@...nel.org,
        andersson@...nel.org, konrad.dybcio@...ainline.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        devicetree@...r.kernel.org, airlied@...il.com
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 v14 1/5] arm64: dts: qcom: add data-lanes and
 link-freuencies into dp_out endpoint

On 23/12/2022 09:57, Krzysztof Kozlowski wrote:
> On 22/12/2022 17:22, Kuogee Hsieh wrote:
>>
>> On 12/22/2022 2:47 AM, Krzysztof Kozlowski wrote:
>>> On 16/12/2022 20:11, 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
>>>>
>>>> Changes in v7:
>>>> -- change 160000000 to 1620000000
>>>> -- separate yaml to different patch
>>>>
>>>> Changes in v8:
>>>> -- correct Bjorn mail address to kernel.org
>>>>
>>>> Changes in v9:
>>>> -- use symbol rate (hz) for link-frequencies at dp_out at sc7180_trogdor.dtsi
>>>>
>>>> Changes in v13:
>>>> -- delete an extra space at data-lanes
>>>>
>>>> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
>>>> ---
>>>>    arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi   | 6 +++++-
>>>>    arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi | 4 ++++
>>>>    2 files changed, 9 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
>>>> index eae22e6..e2783dd 100644
>>>> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
>>>> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
>>>> @@ -814,7 +814,11 @@ 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 <1620000000 2700000000 5400000000>;
>>> Messed order of nodes.
>>
>> can you please give me more details and how should i fixed it?
> 
> Node overrides/extends are more or less ordered by name. dp should not
> be around mdp, but for example dsi.

I think it would be better to also rename dp_out to mdss_dp_out. To keep 
all mdss entries nearby.

-- 
With best wishes
Dmitry