linux-kernel - Re: [PATCH v8 8/9] dt-bindings: display: vop2: Add rk3576 support

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Message-ID: <20250103163449.GA2382623-robh@kernel.org>
Date: Fri, 3 Jan 2025 10:34:49 -0600
From: Rob Herring <robh@...nel.org>
To: Andy Yan <andyshrk@....com>
Cc: heiko@...ech.de, hjc@...k-chips.com, krzk+dt@...nel.org,
	devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, derek.foreman@...labora.com,
	detlev.casanova@...labora.com, daniel@...ishbar.org,
	Andy Yan <andy.yan@...k-chips.com>
Subject: Re: [PATCH v8 8/9] dt-bindings: display: vop2: Add rk3576 support

On Tue, Dec 31, 2024 at 05:07:51PM +0800, Andy Yan wrote:
> From: Andy Yan <andy.yan@...k-chips.com>
> 
> Add vop found on rk3576, the main difference between rk3576 and the
> previous vop is that each VP has its own interrupt line.
> 
> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
> 
> ---
> 
> Changes in v8:
> - Fix dt_binding_check errors
> - ordered by soc name
> - Link to the previous version:
>   https://lore.kernel.org/linux-rockchip/6pn3qjxotdtpzucpul24yro7ppddezwuizneovqvmgdwyv2j7p@ztg4mqyiqmjf/T/#u
> 
> Changes in v4:
> - describe constraint SOC by SOC, as interrupts of rk3576 is very
>   different from others
> - Drop Krzysztof's Reviewed-by, as this version changed a lot.
> 
> Changes in v3:
> - ordered by soc name
> - Add description for newly added interrupt
> 
> Changes in v2:
> - Add dt bindings
> 
>  .../display/rockchip/rockchip-vop2.yaml       | 81 ++++++++++++++-----
>  1 file changed, 63 insertions(+), 18 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip-vop2.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip-vop2.yaml
> index 2531726af306..4cdd9cced10c 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,rk3576-vop
>        - rockchip,rk3588-vop
>  
>    reg:
> @@ -37,10 +38,21 @@ properties:
>        - const: gamma-lut
>  
>    interrupts:
> -    maxItems: 1
> +    minItems: 1
> +    maxItems: 4
>      description:
> -      The VOP interrupt is shared by several interrupt sources, such as
> -      frame start (VSYNC), line flag and other status interrupts.
> +      For VOP version under rk3576, the interrupt is shared by several interrupt
> +      sources, such as frame start (VSYNC), line flag and other interrupt status.
> +      For VOP version from rk3576 there is a system interrupt for bus error, and
> +      every video port has it's independent interrupts for vsync and other video
> +      port related error interrupts.
> +
> +  interrupt-names:
> +    items:
> +      - const: vop-sys
> +      - const: vop-vp0
> +      - const: vop-vp1
> +      - const: vop-vp2

Drop 'vop-' as it is redundant.

>  
>    # See compatible-specific constraints below.
>    clocks:
> @@ -120,43 +132,76 @@ allOf:
>        properties:
>          compatible:
>            contains:
> -            const: rockchip,rk3588-vop
> +            enum:
> +              - rockchip,rk3566-vop
> +              - rockchip,rk3568-vop
>      then:
>        properties:
>          clocks:
> -          minItems: 7
> +          minItems: 5
>          clock-names:
> -          minItems: 7
> -

Keep the blank line between DT properties

> +          minItems: 5
>          ports:
>            required:
>              - port@0
>              - port@1
>              - port@2
> -            - port@3
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - rockchip,rk3576-vop
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 5

blank line

> +        clock-names:
> +          minItems: 5

blank line, and so on.

> +        ports:
> +          required:
> +            - port@0
> +            - port@1
> +            - port@2
> +        interrupts:
> +          items:
> +            - description: vop system interrupt, such as axi bus error
> +            - description: interrupts for video port0, such as vsync, dsp_hold.
> +            - description: interrupts for video port1, such as vsync, dsp_hold.
> +            - description: interrupts for video port2, such as vsync, dsp_hold.

These descriptions belong at the top level.

> +        interrupt-names:
> +          items:
> +            - const: vop-sys
> +            - const: vop-vp0
> +            - const: vop-vp1
> +            - const: vop-vp2

Why are these names defined twice?

You just need 'minItems: 4' in both of these.

>        required:
>          - rockchip,grf
> -        - rockchip,vo1-grf
> -        - rockchip,vop-grf
>          - rockchip,pmu
>  
> -    else:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: rockchip,rk3588-vop
> +    then:
>        properties:
> -        rockchip,vo1-grf: false
> -        rockchip,vop-grf: false
> -        rockchip,pmu: false

How is there no long a case without these properties?

> -
>          clocks:
> -          maxItems: 5
> +          minItems: 7
>          clock-names:
> -          maxItems: 5
> -
> +          minItems: 7
>          ports:
>            required:
>              - port@0
>              - port@1
>              - port@2
> +            - port@3
> +      required:
> +        - rockchip,grf
> +        - rockchip,vo1-grf
> +        - rockchip,vop-grf
> +        - rockchip,pmu
>  
>  additionalProperties: false
>  
> -- 
> 2.34.1
>