Re: [PATCH v2 2/5] ASoC: dt-bindings: fsl,easrc: add ports binding for multiple conversion paths

On Thu, Jul 23, 2026 at 10:23:10AM +0800, [email protected] wrote:
> From: Shengjiu Wang <[email protected]>
>
> The i.MX EASRC hardware supports up to four conversion contexts
> (A, B, C, D). Add a ports container property to the binding to allow
> each independent conversion path to be represented as an individual
> audio-graph port:
>
>   port@0 -- conversion path 0
>   port@1 -- conversion path 1
>   port@2 -- conversion path 2
>   port@3 -- conversion path 3
>
> Each sub-port references audio-graph-port.yaml and follows the standard
> audio-graph binding conventions. Contexts are allocated dynamically at
> stream open time; each active stream direction (playback or capture) on
> a port consumes one hardware context.
>
> Signed-off-by: Shengjiu Wang <[email protected]>
> ---
>  .../devicetree/bindings/sound/fsl,easrc.yaml  | 68 +++++++++++++++++++
>  1 file changed, 68 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/sound/fsl,easrc.yaml b/Documentation/devicetree/bindings/sound/fsl,easrc.yaml
> index d5727f8bfb0b..e6d7cae5983d 100644
> --- a/Documentation/devicetree/bindings/sound/fsl,easrc.yaml
> +++ b/Documentation/devicetree/bindings/sound/fsl,easrc.yaml
> @@ -55,6 +55,14 @@ properties:
>        - const: imx/easrc/easrc-imx8mn.bin
>      description: The coefficient table for the filters
>
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +    patternProperties:
> +      "^port@[0-3]$":
> +        $ref: audio-graph-port.yaml#
> +        unevaluatedProperties: false
> +        description: port for an independent conversion path
> +
>    fsl,asrc-rate:
>      $ref: /schemas/types.yaml#/definitions/uint32
>      minimum: 8000
> @@ -107,3 +115,63 @@ examples:
>          fsl,asrc-rate = <8000>;
>          fsl,asrc-format = <2>;
>      };
> +
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/imx8mn-clock.h>
> +
> +    easrc1: easrc@300c0000 {

Needn't label in example.

> +        compatible = "fsl,imx8mn-easrc";
> +        reg = <0x300c0000 0x10000>;
> +        interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
> +        clocks = <&clk IMX8MN_CLK_ASRC_ROOT>;
> +        clock-names = "mem";
> +        dmas = <&sdma2 16 23 0> , <&sdma2 17 23 0>,
> +               <&sdma2 18 23 0> , <&sdma2 19 23 0>,
> +               <&sdma2 20 23 0> , <&sdma2 21 23 0>,
> +               <&sdma2 22 23 0> , <&sdma2 23 23 0>;
> +        dma-names = "ctx0_rx", "ctx0_tx",
> +                    "ctx1_rx", "ctx1_tx",
> +                    "ctx2_rx", "ctx2_tx",
> +                    "ctx3_rx", "ctx3_tx";
> +        firmware-name = "imx/easrc/easrc-imx8mn.bin";
> +        fsl,asrc-rate = <8000>;
> +        fsl,asrc-format = <2>;
> +
> +        ports {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            port@0 {
> +                reg = <0>;
> +                playback-only;
> +                easrc1_endpoint0: endpoint {

Needn't label.

Frank
> +                    remote-endpoint = <&fe00_ep>;
> +                };
> +            };
> +
> +            port@1 {
> +                reg = <1>;
> +                playback-only;
> +                easrc1_endpoint1: endpoint {
> +                    remote-endpoint = <&fe01_ep>;
> +                };
> +            };
> +
> +            port@2 {
> +                reg = <2>;
> +                capture-only;
> +                easrc1_endpoint2: endpoint {
> +                    remote-endpoint = <&fe02_ep>;
> +                };
> +            };
> +
> +            port@3 {
> +                reg = <3>;
> +                capture-only;
> +                easrc1_endpoint3: endpoint {
> +                    remote-endpoint = <&fe03_ep>;
> +                };
> +            };
> +        };
> +    };
> --
> 2.34.1
>
>