linux-kernel - Re: [PATCH v5 1/3] dt-bindings: display/msm: Add SM6150 DisplayPort controller

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Message-ID: <d048a875-aaa7-4db2-9ef0-daab94bc123d@oss.qualcomm.com>
Date: Thu, 23 Oct 2025 16:50:07 +0800
From: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar
 <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jesszhan0024@...il.com>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        fange.zhang@....qualcomm.com, yongxing.mou@....qualcomm.com,
        li.liu@....qualcomm.com
Subject: Re: [PATCH v5 1/3] dt-bindings: display/msm: Add SM6150 DisplayPort
 controller


On 10/23/2025 1:10 PM, Dmitry Baryshkov wrote:
> On 23/10/2025 07:50, Xiangxu Yin wrote:
>>
>> On 10/22/2025 11:07 PM, Dmitry Baryshkov wrote:
>>> On Tue, Oct 21, 2025 at 11:18:07AM +0800, Xiangxu Yin via B4 Relay wrote:
>>>> From: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
>>>>
>>>> SM6150 uses the same DisplayPort controller as SM8150, which is already
>>>> compatible with SM8350. Add the SM6150-specific compatible string and
>>>> update the binding example accordingly.
>>>>
>>>> Signed-off-by: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
>>>> ---
>>>>   .../devicetree/bindings/display/msm/qcom,sm6150-mdss.yaml   | 13 ++++++++++++-
>>>>   1 file changed, 12 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/display/msm/qcom,sm6150-mdss.yaml b/Documentation/devicetree/bindings/display/msm/qcom,sm6150-mdss.yaml
>>>> index 9ac24f99d3ada1c197c9654dc9babebccae972ed..89852af70de97a9025079107b838de578778c049 100644
>>>> --- a/Documentation/devicetree/bindings/display/msm/qcom,sm6150-mdss.yaml
>>>> +++ b/Documentation/devicetree/bindings/display/msm/qcom,sm6150-mdss.yaml
>>>> @@ -51,6 +51,16 @@ patternProperties:
>>>>         compatible:
>>>>           const: qcom,sm6150-dpu
>>>>   +  "^displayport-controller@[0-9a-f]+$":
>>>> +    type: object
>>>> +    additionalProperties: true
>>>> +    properties:
>>>> +      compatible:
>>>> +        items:
>>>> +          - const: qcom,sm6150-dp
>>>> +          - const: qcom,sm8150-dp
>>>> +          - const: qcom,sm8350-dp
>>>> +
>>>>     "^dsi@[0-9a-f]+$":
>>>>       type: object
>>>>       additionalProperties: true
>>>> @@ -132,13 +142,14 @@ examples:
>>>>                   port@0 {
>>>>                     reg = <0>;
>>>>                     dpu_intf0_out: endpoint {
>>>> +                    remote-endpoint = <&mdss_dp0_in>;
>>> Why?
>>
>>
>> Oh, I think I misunderstood the “messed up indentation” comment from Krzysztof.
>> It seems the two-space indentation under port@X and opp-x is the actual issue.
>>
>> However, that part was not introduced in this patch.
>> I will split a separate patch to fix the indentation there.
>
> Note, you have two different chunks here. The first one is useless as it adds a graph arc to a node that is not a part of the example. 
>

You’re right, I verified with CHECK_DTBS and it passes without it,
so I’ll drop it in the next version.


>>
>>
>>>>                     };
>>>>                   };
>>>>                     port@1 {
>>>>                     reg = <1>;
>>>>                     dpu_intf1_out: endpoint {
>>>> -                      remote-endpoint = <&mdss_dsi0_in>;
>>>> +                    remote-endpoint = <&mdss_dsi0_in>;
>>> Why?
>>
>>
>> Ack.
>
> Use YAML coding style (two-space indentation). For DTS examples in the schema, preferred is four-space indentation. 
>

Ok, will add a new subpatch to fix DTS example indentation.