Re: [PATCH v2 2/5] ASoC: dt-bindings: fsl,easrc: add ports binding for multiple conversion paths
From: Frank Li <hidden>
Date: 2026-07-23 04:34:37
Also in:
imx, linux-arm-kernel, linux-devicetree, linux-sound, lkml
On Thu, Jul 23, 2026 at 10:23:10AM +0800, shengjiu.wang@oss.nxp.com wrote:
quoted hunk ↗ jump to hunk
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 | 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