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ASoC: rsnd: add TDM Split mode support for Document 

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@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2018-11-06 05:21:22 +00:00 committed by Mark Brown
parent 4e7788fb80
commit cf704dc83f
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91
Documentation/devicetree/bindings/sound/renesas,rsnd.txt
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@ -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)
=============================================
@ -648,6 +667,78 @@ 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
=============================================