[PATCH v3 2/5] ASoC: dt-bindings: fsl,easrc: add ports binding for multiple conversion paths
From: <hidden>
Date: 2026-08-04 09:56:03
Also in:
imx, linux-arm-kernel, linux-devicetree, linux-sound, lkml
Subsystem:
open firmware and flattened device tree bindings, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Liam Girdwood, Mark Brown, Linus Torvalds
From: Shengjiu Wang <redacted> 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 <redacted> --- .../devicetree/bindings/sound/fsl,easrc.yaml | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/fsl,easrc.yaml b/Documentation/devicetree/bindings/sound/fsl,easrc.yaml
index d5727f8bfb0b..a53ec4f6f1c0 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
@@ -106,4 +114,41 @@ examples: 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; + endpoint { + remote-endpoint = <&fe00_ep>; + }; + }; + + port@1 { + reg = <1>; + playback-only; + endpoint { + remote-endpoint = <&fe01_ep>; + }; + }; + + port@2 { + reg = <2>; + capture-only; + endpoint { + remote-endpoint = <&fe02_ep>; + }; + }; + + port@3 { + reg = <3>; + capture-only; + endpoint { + remote-endpoint = <&fe03_ep>; + }; + }; + }; };
--
2.34.1