[PATCH v6 6/7] arm64: dts: imx8m: update spdif sound card node properties

Elinor Montmasson
2024-06-27T08:32:05Z

The merge of imx-spdif driver into fsl-asoc-card brought
new DT properties that can be used with the "fsl,imx-audio-spdif"
compatible:
* The "spdif-controller" property from imx-spdif is named "audio-cpu"
in fsl-asoc-card.
* fsl-asoc-card uses codecs explicitly declared in DT
with "audio-codec".
With an S/PDIF, codec drivers spdif_transmitter and
spdif_receiver should be used.
Driver imx-spdif used instead the dummy codec and a pair of
boolean properties, "spdif-in" and "spdif-out".

While backward compatibility is kept to support properties
"spdif-controller", "spdif-in" and "spdif-out", using new properties has
several benefits:
* "audio-cpu" and "audio-codec" are more generic names reflecting
that the fsl-asoc-card driver supports multiple hardware.
They are properties already used by devices using the
fsl-asoc-card driver.
They are also similar to properties of simple-card: "cpu" and "codec".
* "spdif-in" and "spdif-out" imply the use of the dummy codec in the
driver. However, there are already two codec drivers for the S/PDIF,
spdif_transmitter and spdif_receiver.
It is better to declare S/PDIF Tx and Rx devices in a DT, and then
reference them with "audio-codec" than using the dummy codec.

For those reasons, this commit updates in-tree DTs to use the new
properties:
* Rename "spdif-controller" property to "audio-cpu".
* Declare S/PDIF transmitter and/or receiver devices, and use them with
the "audio-codec" property instead of "spdif-out" and/or "spdif-in".

These modifications were tested only on an imx8mn-evk board.

Note that out-of-tree and old DTs are still supported.

Signed-off-by: Elinor Montmasson <elinor.montmasson@savoirfairelinux.com>
---
arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 15 +++++++++---
arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi | 15 +++++++++---
arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 24 +++++++++++++++----
3 files changed, 43 insertions(+), 11 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
index 90d1901df2b1..348855a41852 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
@@ -180,12 +180,21 @@ cpu {
};
};

+ spdif_out: spdif-out {
+ #sound-dai-cells = <0>;
+ compatible = "linux,spdif-dit";
+ };
+
+ spdif_in: spdif-in {
+ #sound-dai-cells = <0>;
+ compatible = "linux,spdif-dir";
+ };
+
sound-spdif {
compatible = "fsl,imx-audio-spdif";
model = "imx-spdif";
- spdif-controller = <&spdif1>;
- spdif-out;
- spdif-in;
+ audio-cpu = <&spdif1>;
+ audio-codec = <&spdif_out>, <&spdif_in>;
};
};

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
index 9e0259ddf4bc..6a47e09703a7 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
@@ -124,12 +124,21 @@ sound-wm8524 {
"Line Out Jack", "LINEVOUTR";
};

+ spdif_out: spdif-out {
+ #sound-dai-cells = <0>;
+ compatible = "linux,spdif-dit";
+ };
+
+ spdif_in: spdif-in {
+ #sound-dai-cells = <0>;
+ compatible = "linux,spdif-dir";
+ };
+
sound-spdif {
compatible = "fsl,imx-audio-spdif";
model = "imx-spdif";
- spdif-controller = <&spdif1>;
- spdif-out;
- spdif-in;
+ audio-cpu = <&spdif1>;
+ audio-codec = <&spdif_out>, <&spdif_in>;
};

sound-micfil {
diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
index 7507548cdb16..b953865f0b46 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
@@ -125,19 +125,33 @@ link_codec: simple-audio-card,codec {
};
};

+ spdif_out: spdif-out {
+ #sound-dai-cells = <0>;
+ compatible = "linux,spdif-dit";
+ };
+
+ spdif_in: spdif-in {
+ #sound-dai-cells = <0>;
+ compatible = "linux,spdif-dir";
+ };
+
sound-spdif {
compatible = "fsl,imx-audio-spdif";
model = "imx-spdif";
- spdif-controller = <&spdif1>;
- spdif-out;
- spdif-in;
+ audio-cpu = <&spdif1>;
+ audio-codec = <&spdif_out>, <&spdif_in>;
+ };
+
+ hdmi_arc_in: hdmi-arc-in {
+ #sound-dai-cells = <0>;
+ compatible = "linux,spdif-dir";
};

sound-hdmi-arc {
compatible = "fsl,imx-audio-spdif";
model = "imx-hdmi-arc";
- spdif-controller = <&spdif2>;
- spdif-in;
+ audio-cpu = <&spdif2>;
+ audio-codec = <&hdmi_arc_in>;
};
};

--
2.34.1