linux-kernel - Re: [PATCH v5 3/5] dt-bindings: display/msm: Document MDSS on QCS8300

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Message-ID: <eb87e18b-8dcf-4ed8-b60c-5673517b7009@quicinc.com>
Date: Mon, 4 Aug 2025 14:11:53 +0800
From: Yongxing Mou <quic_yongmou@...cinc.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
	<jessica.zhang@....qualcomm.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>,
        "Neil
 Armstrong" <neil.armstrong@...aro.org>,
        Kuogee Hsieh
	<quic_khsieh@...cinc.com>,
        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>
Subject: Re: [PATCH v5 3/5] dt-bindings: display/msm: Document MDSS on QCS8300



On 2025/8/4 12:52, Dmitry Baryshkov wrote:
> On Mon, Aug 04, 2025 at 12:31:31PM +0800, Yongxing Mou wrote:
>>
>>
>> On 2025/8/2 17:56, Dmitry Baryshkov wrote:
>>> On Wed, Jul 30, 2025 at 05:42:28PM +0800, Yongxing Mou wrote:
>>>> Document the MDSS hardware found on the Qualcomm QCS8300 platform.
>>>>
>>>> Signed-off-by: Yongxing Mou <quic_yongmou@...cinc.com>
>>>> ---
>>>>    .../bindings/display/msm/qcom,qcs8300-mdss.yaml    | 284 +++++++++++++++++++++
>>>>    1 file changed, 284 insertions(+)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/display/msm/qcom,qcs8300-mdss.yaml b/Documentation/devicetree/bindings/display/msm/qcom,qcs8300-mdss.yaml
>>>> new file mode 100644
>>>> index 0000000000000000000000000000000000000000..ae4bc16395326bffd6c9eff92778d9f207209526
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/display/msm/qcom,qcs8300-mdss.yaml
>>>> @@ -0,0 +1,284 @@
>>>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>>>> +%YAML 1.2
>>>> +---
>>>> +$id: http://devicetree.org/schemas/display/msm/qcom,qcs8300-mdss.yaml#
>>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>>> +
>>>> +title: Qualcomm Technologies, Inc. QCS8300 Display MDSS
>>>> +
>>>> +maintainers:
>>>> +  - Yongxing Mou <quic_yongmou@...cinc.com>
>>>> +
>>>> +description:
>>>> +  QCS8300 MSM Mobile Display Subsystem(MDSS), which encapsulates sub-blocks like
>>>> +  DPU display controller, DP interfaces and EDP etc.
>>>> +
>>>> +$ref: /schemas/display/msm/mdss-common.yaml#
>>>> +
>>>> +properties:
>>>> +  compatible:
>>>> +    const: qcom,qcs8300-mdss
>>>> +
>>>> +  clocks:
>>>> +    items:
>>>> +      - description: Display AHB
>>>> +      - description: Display hf AXI
>>>> +      - description: Display core
>>>> +
>>>> +  iommus:
>>>> +    maxItems: 1
>>>> +
>>>> +  interconnects:
>>>> +    maxItems: 3
>>>> +
>>>> +  interconnect-names:
>>>> +    maxItems: 3
>>>> +
>>>> +patternProperties:
>>>> +  "^display-controller@[0-9a-f]+$":
>>>> +    type: object
>>>> +    additionalProperties: true
>>>> +
>>>> +    properties:
>>>> +      compatible:
>>>> +        items:
>>>> +          - const: qcom,qcs8300-dpu
>>>> +          - const: qcom,sa8775p-dpu
>>>
>>> Use contains: instead of listing both of them
>>>
>> Got it, thanks~ here we want to fallback qcs8300 to sa8775p.
>> Should we update it to :
>> +        contains:
>> +          enum:
>> +            - qcom,qcs8300-dpu
>> +            - qcom,sa8775p-dpu
>>
>>   above method can be validated using dt_binding_check.
> 
> 
> _instead_ of listing both of them
> 
> So:
> 
>    contains:
>      const: qcom,qcs8300-dpu
> 
Got it.. thanks~!
>>>> +
>>>> +  "^displayport-controller@[0-9a-f]+$":
>>>> +    type: object
>>>> +    additionalProperties: true
>>>> +
>>>> +    properties:
>>>> +      compatible:
>>>> +        items:
>>>> +          - const: qcom,qcs8300-dp
>>>> +
>>>> +  "^phy@[0-9a-f]+$":
>>>> +    type: object
>>>> +    additionalProperties: true
>>>> +    properties:
>>>> +      compatible:
>>>> +        items:
>>>> +          - const: qcom,qcs8300-edp-phy
>>>> +          - const: qcom,sa8775p-edp-phy
>>>
>>> Use contains: instead of listing both of them
>>>
>> Same as above
>>>> +
>>>> +required:
>>>> +  - compatible
>>>> +
>>>> +unevaluatedProperties: false
>>>> +
>>>
>>
>