linux-kernel - Re: [PATCH v3 3/4] dt-bindings: display/msm: Document MDSS on QCS8300

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Message-ID: <CAA8EJppUEB-c5LbWN5dJoRh+6+nNFH3G9h_uwbuTo=B8kp_9oA@mail.gmail.com>
Date: Tue, 14 Jan 2025 12:00:42 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Yongxing Mou <quic_yongmou@...cinc.com>, Rob Clark <robdclark@...il.com>, 
	Abhinav Kumar <quic_abhinavk@...cinc.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>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Kuogee Hsieh <quic_khsieh@...cinc.com>, 
	Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>, 
	Bjorn Andersson <andersson@...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, 
	linux-phy@...ts.infradead.org
Subject: Re: [PATCH v3 3/4] dt-bindings: display/msm: Document MDSS on QCS8300

On Tue, 14 Jan 2025 at 09:57, Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On Mon, Jan 13, 2025 at 04:03:10PM +0800, Yongxing Mou wrote:
> > +patternProperties:
> > +  "^display-controller@[0-9a-f]+$":
> > +    type: object
> > +    additionalProperties: true
> > +
> > +    properties:
> > +      compatible:
> > +        items:
> > +          - const: qcom,qcs8300-dpu
> > +          - const: qcom,sa8775p-dpu
> > +
> > +  "^displayport-controller@[0-9a-f]+$":
> > +    type: object
> > +    additionalProperties: true
> > +
> > +    properties:
> > +      compatible:
> > +        items:
> > +          - const: qcom,qcs8300-dp
> > +          - const: qcom,sm8650-dp
>
> Parts of qcs8300 display are compatible with sa8775p, other parts with
> sm8650. That's odd or even not correct. Assuming it is actually correct,
> it deserves explanation in commit msg.

It seems to be correct. These are two different IP blocks with
different modifications. QCS8300's DP configuration matches the SM8650
([1]), though the DPU is the same as the one on the SA8775P platform.

[1] https://lore.kernel.org/dri-devel/411626da-7563-48fb-ac7c-94f06e73e4b8@quicinc.com/


-- 
With best wishes
Dmitry