Re: [PATCH 10/11] dt-bindings: display: convert Arm Mali-DP to DT schema

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On Wed, Apr 27, 2022 at 12:25:27PM +0100, Andre Przywara wrote:
> The Arm Mali Display Processor (DP) 5xx/6xx is a series of IP that scans
> out a framebuffer and hands the pixels over to a digital signal encoder.
> It supports multiple layers, scaling and rotation.
> 
> Convert the existing DT binding to DT schema.
> 
> Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
> ---
>  .../bindings/display/arm,malidp.txt           |  68 ----------
>  .../bindings/display/arm,malidp.yaml          | 117 ++++++++++++++++++
>  2 files changed, 117 insertions(+), 68 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/display/arm,malidp.txt
>  create mode 100644 Documentation/devicetree/bindings/display/arm,malidp.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/arm,malidp.txt b/Documentation/devicetree/bindings/display/arm,malidp.txt
> deleted file mode 100644
> index 7a97a2b48c2a2..0000000000000
> --- a/Documentation/devicetree/bindings/display/arm,malidp.txt
> +++ /dev/null
> @@ -1,68 +0,0 @@
> -ARM Mali-DP
> -
> -The following bindings apply to a family of Display Processors sold as
> -licensable IP by ARM Ltd. The bindings describe the Mali DP500, DP550 and
> -DP650 processors that offer multiple composition layers, support for
> -rotation and scaling output.
> -
> -Required properties:
> -  - compatible: should be one of
> -	"arm,mali-dp500"
> -	"arm,mali-dp550"
> -	"arm,mali-dp650"
> -    depending on the particular implementation present in the hardware
> -  - reg: Physical base address and size of the block of registers used by
> -    the processor.
> -  - interrupts: Interrupt list, as defined in ../interrupt-controller/interrupts.txt,
> -    interrupt client nodes.
> -  - interrupt-names: name of the engine inside the processor that will
> -    use the corresponding interrupt. Should be one of "DE" or "SE".
> -  - clocks: A list of phandle + clock-specifier pairs, one for each entry
> -    in 'clock-names'
> -  - clock-names: A list of clock names. It should contain:
> -      - "pclk": for the APB interface clock
> -      - "aclk": for the AXI interface clock
> -      - "mclk": for the main processor clock
> -      - "pxlclk": for the pixel clock feeding the output PLL of the processor.
> -  - arm,malidp-output-port-lines: Array of u8 values describing the number
> -    of output lines per channel (R, G and B).
> -
> -Required sub-nodes:
> -  - port: The Mali DP connection to an encoder input port. The connection
> -    is modelled using the OF graph bindings specified in
> -    Documentation/devicetree/bindings/graph.txt
> -
> -Optional properties:
> -  - memory-region: phandle to a node describing memory (see
> -    Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt)
> -    to be used for the framebuffer; if not present, the framebuffer may
> -    be located anywhere in memory.
> -  - arm,malidp-arqos-high-level: integer of u32 value describing the ARQoS
> -    levels of DP500's QoS signaling.
> -
> -
> -Example:
> -
> -/ {
> -	...
> -
> -	dp0: malidp@6f200000 {
> -		compatible = "arm,mali-dp650";
> -		reg = <0 0x6f200000 0 0x20000>;
> -		memory-region = <&display_reserved>;
> -		interrupts = <0 168 IRQ_TYPE_LEVEL_HIGH>,
> -			     <0 168 IRQ_TYPE_LEVEL_HIGH>;
> -		interrupt-names = "DE", "SE";
> -		clocks = <&oscclk2>, <&fpgaosc0>, <&fpgaosc1>, <&fpgaosc1>;
> -		clock-names = "pxlclk", "mclk", "aclk", "pclk";
> -		arm,malidp-output-port-lines = /bits/ 8 <8 8 8>;
> -		arm,malidp-arqos-high-level = <0xd000d000>;
> -		port {
> -			dp0_output: endpoint {
> -				remote-endpoint = <&tda998x_2_input>;
> -			};
> -		};
> -	};
> -
> -	...
> -};
> diff --git a/Documentation/devicetree/bindings/display/arm,malidp.yaml b/Documentation/devicetree/bindings/display/arm,malidp.yaml
> new file mode 100644
> index 0000000000000..86b636662f803
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/arm,malidp.yaml
> @@ -0,0 +1,117 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/arm,malidp.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Arm Mali Display Processor (Mali-DP) binding
> +
> +maintainers:
> +  - Liviu Dudau <Liviu.Dudau@xxxxxxx>
> +  - Andre Przywara <andre.przywara@xxxxxxx>
> +
> +description: |+
> +  The following bindings apply to a family of Display Processors sold as
> +  licensable IP by ARM Ltd. The bindings describe the Mali DP500, DP550 and
> +  DP650 processors that offer multiple composition layers, support for
> +  rotation and scaling output.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - arm,mali-dp500
> +      - arm,mali-dp550
> +      - arm,mali-dp650
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    items:
> +      - description:
> +          The interrupt used by the Display Engine (DE). Can be shared with
> +          the interrupt for the Scaling Engine (SE), but it will have to be
> +          listed individually.
> +      - description:
> +          The interrupt used by the Scaling Engine (SE). Can be shared with
> +          the interrupt for the Display Engine (DE), but it will have to be
> +          listed individually.
> +
> +  interrupt-names:
> +    items:
> +      - const: DE
> +      - const: SE
> +
> +  clock-names:
> +    items:
> +      - const: pxlclk
> +      - const: mclk
> +      - const: aclk
> +      - const: pclk
> +
> +  clocks:
> +    items:
> +      - description: the pixel clock feeding the output PLL of the processor
> +      - description: the main processor clock
> +      - description: the AXI interface clock
> +      - description: the APB interface clock
> +
> +  memory-region:
> +    maxItems: 1
> +    description:
> +      Phandle to a node describing memory to be used for the framebuffer.
> +      If not present, the framebuffer may be located anywhere in memory.
> +
> +  arm,malidp-output-port-lines:
> +    $ref: /schemas/types.yaml#/definitions/uint8-array
> +    description:
> +      Number of output lines/bits for each colour channel.
> +    items:
> +      - description: number of output lines for the red channel (R)
> +      - description: number of output lines for the green channel (G)
> +      - description: number of output lines for the blue channel (B)
> +
> +  arm,malidp-arqos-high-level:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description:
> +      integer describing the ARQoS levels of DP500's QoS signaling
> +
> +  port:
> +    $ref: /schemas/graph.yaml#/$defs/port-base

/properties/port

> +    unevaluatedProperties: false
> +    description:
> +      Output endpoint of the controller, connecting the LCD panel signals.
> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - interrupt-names
> +  - clocks
> +  - clock-names
> +  - port
> +  - arm,malidp-output-port-lines
> +
> +examples:
> +  - |
> +    dp0: malidp@6f200000 {
> +            compatible = "arm,mali-dp650";
> +            reg = <0x6f200000 0x20000>;
> +            memory-region = <&display_reserved>;
> +            interrupts = <168>, <168>;
> +            interrupt-names = "DE", "SE";
> +            clocks = <&oscclk2>, <&fpgaosc0>, <&fpgaosc1>, <&fpgaosc1>;
> +            clock-names = "pxlclk", "mclk", "aclk", "pclk";
> +            arm,malidp-output-port-lines = /bits/ 8 <8 8 8>;
> +            arm,malidp-arqos-high-level = <0xd000d000>;
> +
> +            port {
> +                    dp0_output: endpoint {
> +                            remote-endpoint = <&tda998x_2_input>;
> +                    };
> +            };
> +    };
> +
> +...
> -- 
> 2.25.1
> 
> 



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