From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
This patch adds TDM Split mode support. rsnd driver is assuming
audio-graph-scu-card is used for Sound Card.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
.../devicetree/bindings/sound/renesas,rsnd.txt | 91 ++++++++++++++++++++++
1 file changed, 91 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/renesas,rsnd.txt b/Documentation/devicetree/bindings/sound/renesas,rsnd.txt
index 6ed1a36..453e8ec 100644
--- a/Documentation/devicetree/bindings/sound/renesas,rsnd.txt
+++ b/Documentation/devicetree/bindings/sound/renesas,rsnd.txt
@@ -188,6 +188,25 @@ In DMA mode, you can select not to use SSIU by using "no-busif" via SSI.
SSIU handles BUSIF which will be used for TDM Split mode.
This driver is assuming that audio-graph card will be used.
+TDM Split mode merges 4 sounds. You can see 4 sound interface on system,
+and these sounds will be merged SSIU/SSI.
+
+ aplay -D plughw:0,0 xxxx.wav &
+ aplay -D plughw:0,1 xxxx.wav &
+ aplay -D plughw:0,2 xxxx.wav &
+ aplay -D plughw:0,3 xxxx.wav
+
+ 2ch 8ch
+ [MEM] -> [SSIU 30] -+-> [SSIU 3] --> [Codec]
+ 2ch |
+ [MEM] -> [SSIU 31] -+
+ 2ch |
+ [MEM] -> [SSIU 32] -+
+ 2ch |
+ [MEM] -> [SSIU 33] -+
+
+see "Example: simple sound card for TDM Split"
+
=============================================
* SSI (Serial Sound Interface)
=============================================
@@ -649,6 +668,78 @@ rsnd_tdm: sound {
};
=============================================
+Example: simple sound card for TDM Split
+=============================================
+
+sound_card: sound {
+ compatible = "audio-graph-scu-card";
+ prefix = "xxxx";
+ routing = "xxxx Playback", "DAI0 Playback",
+ "xxxx Playback", "DAI1 Playback",
+ "xxxx Playback", "DAI2 Playback",
+ "xxxx Playback", "DAI3 Playback";
+ convert-channels = <8>; /* TDM Split */
+
+ dais = <&rsnd_port0 /* playback ch1/ch2 */
+ &rsnd_port1 /* playback ch3/ch4 */
+ &rsnd_port2 /* playback ch5/ch6 */
+ &rsnd_port3 /* playback ch7/ch8 */
+ >;
+};
+
+audio-codec {
+ ...
+ port {
+ codec_0: endpoint@1 {
+ remote-endpoint = <&rsnd_ep0>;
+ };
+ codec_1: endpoint@2 {
+ remote-endpoint = <&rsnd_ep1>;
+ };
+ codec_2: endpoint@3 {
+ remote-endpoint = <&rsnd_ep2>;
+ };
+ codec_3: endpoint@4 {
+ remote-endpoint = <&rsnd_ep3>;
+ };
+ };
+};
+
+&rcar_sound {
+ ...
+ ports {
+ rsnd_port0: port@0 {
+ rsnd_ep0: endpoint {
+ remote-endpoint = <&codec_0>;
+ ...
+ playback = <&ssiu30 &ssi3>;
+ };
+ };
+ rsnd_port1: port@1 {
+ rsnd_ep1: endpoint {
+ remote-endpoint = <&codec_1>;
+ ...
+ playback = <&ssiu31 &ssi3>;
+ };
+ };
+ rsnd_port2: port@2 {
+ rsnd_ep2: endpoint {
+ remote-endpoint = <&codec_2>;
+ ...
+ playback = <&ssiu32 &ssi3>;
+ };
+ };
+ rsnd_port3: port@3 {
+ rsnd_ep3: endpoint {
+ remote-endpoint = <&codec_3>;
+ ...
+ playback = <&ssiu33 &ssi3>;
+ };
+ };
+ };
+};
+
+=============================================
Example: simple sound card for Multi channel
=============================================
--
2.7.4
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