[RESEND PATCH v5 1/5] ASoC: dt-bindings: fsl,imx-asrc: update port binding to support multiple paths

[Frank Li]

On Tue, Sep 22, 2026 at 11:34:24AM +0800, shengjiu.wang at oss.nxp.com wrote:
> From: Shengjiu Wang <shengjiu.wang at nxp.com>
>
> All i.MX ASRC variants (imx35 through imx952) support up to three
> conversion pairs (A, B, C). The existing binding exposed only a single
> generic audio-graph port, which cannot represent independent conversion
> paths when multiple pairs are in use simultaneously.
>
> Add a ports container that enumerates up to three sub-ports, each
> representing an independent conversion path:
>   port at 0 -- conversion path 0
>   port at 1 -- conversion path 1
>   port at 2 -- conversion path 2
>
> Each sub-port references audio-graph-port.yaml as before. Hardware pairs
> are allocated dynamically at stream open time; each active stream
> direction (playback or capture) on a port consumes one hardware pair.
>
> For backwards compatibility, keep the old single port property but mark
> it deprecated. A schema constraint (not: required: [port, ports]) ensures
> that both forms cannot be used at the same time. The binding example is
> updated to show the preferred ports form.
>
> Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.com>
> ---

Reviewed-by: Frank Li <Frank.Li at nxp.com>

>  .../bindings/sound/fsl,imx-asrc.yaml          | 43 +++++++++++++++++--
>  1 file changed, 39 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml b/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml
> index cd69bad107c7..67d2826eef3f 100644
> --- a/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml
> +++ b/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml
> @@ -78,9 +78,19 @@ properties:
>    power-domains:
>      maxItems: 1
>
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +    patternProperties:
> +      "^port@[0-2]$":
> +        $ref: audio-graph-port.yaml#
> +        unevaluatedProperties: false
> +        description: port for an independent conversion path
> +
>    port:
>      $ref: audio-graph-port.yaml#
>      unevaluatedProperties: false
> +    deprecated: true
> +    description: deprecated, use ports instead
>
>    fsl,asrc-rate:
>      $ref: /schemas/types.yaml#/definitions/uint32
> @@ -125,6 +135,10 @@ required:
>    - fsl,asrc-width
>
>  allOf:
> +  - not:
> +      required:
> +        - port
> +        - ports
>    - $ref: dai-common.yaml#
>    - if:
>        properties:
> @@ -180,11 +194,32 @@ examples:
>          fsl,asrc-rate = <48000>;
>          fsl,asrc-width = <16>;
>
> -        port {
> -            playback-only;
> +        ports {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            port at 0 {
> +                reg = <0>;
> +                playback-only;
> +                endpoint {
> +                    remote-endpoint = <&fe00_ep>;
> +                };
> +            };
> +
> +            port at 1 {
> +                reg = <1>;
> +                capture-only;
> +                endpoint {
> +                    remote-endpoint = <&fe01_ep>;
> +                };
> +            };
>
> -            asrc_endpoint: endpoint {
> -                remote-endpoint = <&fe00_ep>;
> +            port at 2 {
> +                reg = <2>;
> +                capture-only;
> +                endpoint {
> +                    remote-endpoint = <&fe02_ep>;
> +                };
>              };
>          };
>      };
> --
> 2.34.1
>
>