ASoC: rsnd: add usage for SRC

This patch add missing usage comment for SRC.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87zgy9z9es.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c
index 585ffba0244b9f568685ed52323d31f7f9fcb3b4..628af8f3920d71dabe8beb50bf12147457d481a1 100644 (file)
--- a/sound/soc/sh/rcar/src.c
+++ b/sound/soc/sh/rcar/src.c
@@ -5,6 +5,15 @@
 // Copyright (C) 2013 Renesas Solutions Corp.
 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 
+/*
+ * You can use Synchronous Sampling Rate Convert (if no DVC)
+ *
+ *     amixer set "SRC Out Rate" on
+ *     aplay xxx.wav &
+ *     amixer set "SRC Out Rate" 96000 // convert rate to 96000Hz
+ *     amixer set "SRC Out Rate" 22050 // convert rate to 22050Hz
+ */
+
 /*
  * you can enable below define if you don't need
  * SSI interrupt status debug message when debugging