linux-kernel - Re: [PATCH v2 08/12] dt-bindings: display: vop2: Add rk3588 support

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Message-ID: <4d6c5980-e573-4d85-bc9c-6726413a15d3@rock-chips.com>
Date:   Thu, 30 Nov 2023 20:32:16 +0800
From:   Andy Yan <andy.yan@...k-chips.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Yan <andyshrk@....com>, heiko@...ech.de
Cc:     hjc@...k-chips.com, dri-devel@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        devicetree@...r.kernel.org, sebastian.reichel@...labora.com,
        kever.yang@...k-chips.com, chris.obbard@...labora.com,
        s.hauer@...gutronix.de
Subject: Re: [PATCH v2 08/12] dt-bindings: display: vop2: Add rk3588 support

Hi Krzysztof:


On 11/23/23 03:07, Krzysztof Kozlowski wrote:
> On 22/11/2023 13:55, Andy Yan wrote:
>> From: Andy Yan <andy.yan@...k-chips.com>
>>
>> The vop2 on rk3588 is similar to which on rk356x
>> but with 4 video ports and need to reference
>> more grf modules.
>>
>> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
>>
>> ---
>>
>> Changes in v2:
>> - fix errors when running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
>>
>>   .../display/rockchip/rockchip-vop2.yaml       | 27 +++++++++++++++++++
>>   1 file changed, 27 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip-vop2.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip-vop2.yaml
>> index b60b90472d42..24148d9b3b14 100644
>> --- a/Documentation/devicetree/bindings/display/rockchip/rockchip-vop2.yaml
>> +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip-vop2.yaml
>> @@ -20,6 +20,7 @@ properties:
>>       enum:
>>         - rockchip,rk3566-vop
>>         - rockchip,rk3568-vop
>> +      - rockchip,rk3588-vop
>>   
>>     reg:
>>       items:
>> @@ -42,26 +43,47 @@ properties:
>>         frame start (VSYNC), line flag and other status interrupts.
>>   
>>     clocks:
>> +    minItems: 3
>>       items:
>>         - description: Clock for ddr buffer transfer.
>>         - description: Clock for the ahb bus to R/W the phy regs.
>>         - description: Pixel clock for video port 0.
>>         - description: Pixel clock for video port 1.
>>         - description: Pixel clock for video port 2.
>> +      - description: Pixel clock for video port 4.
>> +      - description: Peripheral clock for vop on rk3588.
>>   
>>     clock-names:
>> +    minItems: 3
> 
> You relax requirements for all existing variants here which is not
> explained in commit msg. I assume this was not intentional, so you need
> to re-constrain them in allOf:if:then.
> 
> See for example:
> https://elixir.bootlin.com/linux/v5.19-rc6/source/Documentation/devicetree/bindings/clock/samsung,exynos7-clock.yaml#L57
> for some ideas.
> 
>>       items:
>>         - const: aclk
>>         - const: hclk
>>         - const: dclk_vp0
>>         - const: dclk_vp1
>>         - const: dclk_vp2
>> +      - const: dclk_vp3
>> +      - const: pclk_vop
>>   
>>     rockchip,grf:
>>       $ref: /schemas/types.yaml#/definitions/phandle
>>       description:
>>         Phandle to GRF regs used for misc control
>>   
>> +  rockchip,vo-grf:
>> +    $ref: /schemas/types.yaml#/definitions/phandle
>> +    description:
>> +      Phandle to VO GRF regs used for misc control, required for rk3588
> 
> Drop last sentence, instead add it to required in allOf:if:then.
> 
> Is this valid for other variants? If not, should be disallowed in
> allOf:if:then: for them.

Only valid for rk3588 now.

> 
>> +
>> +  rockchip,vop-grf:
>> +    $ref: /schemas/types.yaml#/definitions/phandle
>> +    description:
>> +      Phandle to VOP GRF regs used for misc control, required for rk3588
>> +
>> +  rockchip,pmu:
>> +    $ref: /schemas/types.yaml#/definitions/phandle
>> +    description:
>> +      Phandle to PMU regs used for misc control, required for rk3588
> 
> For all these three: what is "misc control"? Way too vague. Everything
> is a misc and everything can be control. You must be here specific and
> much more descriptive.

improve in v3

> 
>> +
>>     ports:
>>       $ref: /schemas/graph.yaml#/properties/ports
>>   
>> @@ -81,6 +103,11 @@ properties:
>>           description:
>>             Output endpoint of VP2
>>   
>> +      port@3:
>> +        $ref: /schemas/graph.yaml#/properties/port
>> +        description:
>> +          Output endpoint of VP3
> 
> Valid for other variants?
> 

Only valid for rk3588 now.

Thanks for your review and guidance, I try to fix in v3 [0]

[0]https://patchwork.kernel.org/project/linux-rockchip/patch/20231130122418.13258-1-andyshrk@163.com/
> Best regards,
> Krzysztof
>