Re: [PATCH v3 1/5] ASoC: dt-bindings: fsl,imx-asrc: update port binding to support multiple paths

On Tue, Aug 04, 2026 at 06:02:14PM +0800, shengjiu.wang@oss.nxp.com wrote:

From: Shengjiu Wang <redacted>

The i.MX ASRC hardware supports up to three conversion pairs (A, B, C).

Which SoC? Did you read this binding you are changing?

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@0 -- conversion path 0
  port@1 -- conversion path 1
  port@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

Why? Did the old hardware change that it has more ports/paths?

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.

No existing upstream DTS file for fsl,imx-asrc uses the previously
documented single 'port' node, so this change does not break any
in-tree device tree.

Does it break other users of this binding?

Why mentioning upstream in the first place? Either this change breaks
ABI or not, explain that.


Best regards,
Krzysztof