linux-kernel - Re: [PATCH v2 1/3] dt-bindings: display: msm: dp-controller: document X1E80100 compatible

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Date: Fri, 1 Mar 2024 19:52:45 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Rob Clark <robdclark@...il.com>,
	Abhinav Kumar <quic_abhinavk@...cinc.com>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Sean Paul <sean@...rly.run>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...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 <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Kuogee Hsieh <quic_khsieh@...cinc.com>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Johan Hovold <johan@...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
Subject: Re: [PATCH v2 1/3] dt-bindings: display: msm: dp-controller:
 document X1E80100 compatible

On 24-02-27 16:45:25, Krzysztof Kozlowski wrote:
> On 22/02/2024 16:55, Abel Vesa wrote:
> > Add the X1E80100 to the list of compatibles and document the is-edp
> > flag. The controllers are expected to operate in DP mode by default,
> > and this flag can be used to select eDP mode.
> > 
> > Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> > ---
> >  Documentation/devicetree/bindings/display/msm/dp-controller.yaml | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> > index ae53cbfb2193..ed11852e403d 100644
> > --- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> > +++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
> > @@ -27,6 +27,7 @@ properties:
> >            - qcom,sdm845-dp
> >            - qcom,sm8350-dp
> >            - qcom,sm8650-dp
> > +          - qcom,x1e80100-dp
> >        - items:
> >            - enum:
> >                - qcom,sm8150-dp
> > @@ -73,6 +74,11 @@ properties:
> >        - description: phy 0 parent
> >        - description: phy 1 parent
> >  
> > +  is-edp:
> > +    $ref: /schemas/types.yaml#/definitions/flag
> > +    description:
> > +      Tells the controller to switch to eDP mode
> 
> 
> DP controller cannot be edp, so property "is-edp" is confusing. Probably
> you want to choose some phy mode, so you should rather use "phy-mode"
> property. I am sure we've been here...

phy-mode in controller node or in the phy node?

> 
> Anyway, if you define completely new property without vendor prefix,
> that's a generic property, so you need to put it in some common schema
> for all Display Controllers, not only Qualcomm.

I can re-spin with qcom,is-edp if that's better.

> 
> 
> Best regards,
> Krzysztof
>