linux-kernel - Re: [PATCH v6 1/4] dt-bindings: display: msm: Add SM6150 DisplayPort controller

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Message-ID: <m6j3sdc4jb2jonzbpez7g3xb6cfputdz34wtydfrx736nqvrv6@o5ntg7csl7dr>
Date: Mon, 27 Oct 2025 13:54:43 -0500
From: Bjorn Andersson <andersson@...nel.org>
To: xiangxu.yin@....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>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...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 v6 1/4] dt-bindings: display: msm: Add SM6150 DisplayPort
 controller

On Fri, Oct 24, 2025 at 01:21:01PM +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      | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/msm/qcom,sm6150-mdss.yaml b/Documentation/devicetree/bindings/display/msm/qcom,sm6150-mdss.yaml
> index 9ac24f99d3ada1c197c9654dc9babebccae972ed..ba0dea2edea98cee0826cf38b3f33361666e004a 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

Perhaps I'm missing something, but if sm6150-dp is the same controller
as sm8150-dp, which is the same controller as sm8350-dp...doesn't that
imply that sm6150-dp is the same as sm8350-dp and we could not mention
the sm8150-dp here?

Regards,
Bjorn

> +          - const: qcom,sm8350-dp
> +
>    "^dsi@[0-9a-f]+$":
>      type: object
>      additionalProperties: true
> 
> -- 
> 2.34.1
> 
>