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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2016-03-10 08:29:21 +0300
committerMark Brown <broonie@kernel.org>2016-03-12 09:03:41 +0300
commitf1511a14a4a94d063cf8f8f12f36cf2ebb0cc8a8 (patch)
tree73432e39c7f2e6405146db83aff64ed267ba9b36 /sound
parent09e59075496517206351cc28226ad7263a1a5c4f (diff)
downloadlinux-f1511a14a4a94d063cf8f8f12f36cf2ebb0cc8a8.tar.xz
ASoC: rsnd: add simplified module explanation
Renesas sound driver user needs to read its datasheet when create DT. But it is difficult to understand, because it has many modules (SRC/CTU/MIX/DVC/SSIU/SSI/AudioDMAC/AudioDMACperiperi), and many features (Asynchronous/Synchronous mode on SRC, CTU matrix, DVC volume settings feature, Multi-SSI/TDM-SSI, etc). This patch adds simplified explanation to help setting/understanding. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/sh/rcar/dvc.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/sound/soc/sh/rcar/dvc.c b/sound/soc/sh/rcar/dvc.c
index 93b11e1c5d7f..02d971f69eff 100644
--- a/sound/soc/sh/rcar/dvc.c
+++ b/sound/soc/sh/rcar/dvc.c
@@ -8,6 +8,29 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+
+/*
+ * Playback Volume
+ * amixer set "DVC Out" 100%
+ *
+ * Capture Volume
+ * amixer set "DVC In" 100%
+ *
+ * Playback Mute
+ * amixer set "DVC Out Mute" on
+ *
+ * Capture Mute
+ * amixer set "DVC In Mute" on
+ *
+ * Volume Ramp
+ * amixer set "DVC Out Ramp Up Rate" "0.125 dB/64 steps"
+ * amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
+ * amixer set "DVC Out Ramp" on
+ * aplay xxx.wav &
+ * amixer set "DVC Out" 80% // Volume Down
+ * amixer set "DVC Out" 100% // Volume Up
+ */
+
#include "rsnd.h"
#define RSND_DVC_NAME_SIZE 16