linux-kernel - Re: [PATCH 88/89] dt-bindings: display: vc4: hdmi: Add BCM2711 HDMI controllers bindings

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Date:   Tue, 25 Feb 2020 12:24:10 -0600
From:   Rob Herring <robh@...nel.org>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Eric Anholt <eric@...olt.net>, dri-devel@...ts.freedesktop.org,
        linux-rpi-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>, devicetree@...r.kernel.org
Subject: Re: [PATCH 88/89] dt-bindings: display: vc4: hdmi: Add BCM2711 HDMI
 controllers bindings

On Mon, Feb 24, 2020 at 10:07:30AM +0100, Maxime Ripard wrote:
> The HDMI controllers found in the BCM2711 SoC need some adjustments to the
> bindings, especially since the registers have been shuffled around in more
> register ranges.
> 
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Maxime Ripard <maxime@...no.tech>
> ---
>  Documentation/devicetree/bindings/display/brcm,bcm2835-hdmi.yaml | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------
>  1 file changed, 109 insertions(+), 9 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/brcm,bcm2835-hdmi.yaml b/Documentation/devicetree/bindings/display/brcm,bcm2835-hdmi.yaml
> index 52b3cdac0bdf..a9d24e1cf684 100644
> --- a/Documentation/devicetree/bindings/display/brcm,bcm2835-hdmi.yaml
> +++ b/Documentation/devicetree/bindings/display/brcm,bcm2835-hdmi.yaml
> @@ -11,24 +11,58 @@ maintainers:
>  
>  properties:
>    compatible:
> -    const: brcm,bcm2835-hdmi
> +    enum:
> +      - brcm,bcm2835-hdmi
> +      - brcm,bcm2711-hdmi0
> +      - brcm,bcm2711-hdmi1
>  
>    reg:
> +    oneOf:
> +      - items:
> +        - description: HDMI register range
> +        - description: HD register range
> +
> +      - items:
> +        - description: HDMI controller register range
> +        - description: DVP register range
> +        - description: HDMI PHY register range
> +        - description: Rate Manager register range
> +        - description: Packet RAM register range
> +        - description: Metadata RAM register range
> +        - description: CSC register range
> +        - description: CEC register range
> +        - description: HD register range
> +
> +  reg-names:
>      items:
> -      - description: HDMI register range
> -      - description: HD register range
> +      - const: hdmi
> +      - const: dvp
> +      - const: phy
> +      - const: rm
> +      - const: packet
> +      - const: metadata
> +      - const: csc
> +      - const: cec
> +      - const: hd

Don't you want 'hd' 2nd or need to define the 2 entry case separately?

Really, I think this should be 2 files. All but interrupts and ddc have 
a difference.

>  
>    interrupts:
>      minItems: 2
>  
>    clocks:
> -    items:
> -      - description: The pixel clock
> -      - description: The HDMI state machine clock
> +    oneOf:
> +      - items:
> +        - description: The pixel clock
> +        - description: The HDMI state machine clock
> +
> +      - items:
> +        - description: The HDMI state machine clock
>  
>    clock-names:
> -    items:
> -      - const: pixel
> +    oneOf:
> +      - items:
> +        - const: pixel
> +        - const: hdmi
> +
>        - const: hdmi
>  
>    ddc:
> @@ -51,15 +85,54 @@ properties:
>    dma-names:
>      const: audio-rx
>  
> +  resets:
> +    maxItems: 1
> +
>  required:
>    - compatible
>    - reg
> -  - interrupts
>    - clocks
>    - ddc
>  
>  additionalProperties: false
>  
> +if:
> +  properties:
> +    compatible:
> +      contains:
> +        enum:
> +          - brcm,bcm2711-hdmi0
> +          - brcm,bcm2711-hdmi1
> +
> +then:
> +  properties:
> +    reg:
> +      minItems: 9
> +
> +    clocks:
> +      maxItems: 1
> +
> +    clock-names:
> +      maxItems: 1
> +
> +  required:
> +    - reg-names
> +    - resets
> +
> +else:
> +  properties:
> +    reg:
> +      maxItems: 2
> +
> +    clocks:
> +      minItems: 2
> +
> +    clock-names:
> +      minItems: 2
> +
> +  required:
> +    - interrupts
> +
>  examples:
>    - |
>      #include <dt-bindings/clock/bcm2835.h>
> @@ -77,4 +150,31 @@ examples:
>          clock-names = "pixel", "hdmi";
>      };
>  
> +  - |
> +    hdmi0: hdmi@...00700 {
> +        compatible = "brcm,bcm2711-hdmi0";
> +        reg = <0x7ef00700 0x300>,
> +              <0x7ef00300 0x200>,
> +              <0x7ef00f00 0x80>,
> +              <0x7ef00f80 0x80>,
> +              <0x7ef01b00 0x200>,
> +              <0x7ef01f00 0x400>,
> +              <0x7ef00200 0x80>,
> +              <0x7ef04300 0x100>,
> +              <0x7ef20000 0x100>;
> +        reg-names = "hdmi",
> +                    "dvp",
> +                    "phy",
> +                    "rm",
> +                    "packet",
> +                    "metadata",
> +                    "csc",
> +                    "cec",
> +                    "hd";
> +        clocks = <&firmware_clocks 13>;
> +        clock-names = "hdmi";
> +        resets = <&dvp 0>;
> +        ddc = <&ddc0>;
> +    };
> +
>  ...
> -- 
> git-series 0.9.1