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ASoC: rsnd: add simplified module explanation

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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>
This commit is contained in:
Kuninori Morimoto
2016-03-10 05:29:21 +00:00
committed by Mark Brown
parent 09e5907549
commit f1511a14a4
2 changed files with 363 additions and 0 deletions
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23
sound/soc/sh/rcar/dvc.c
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@@ -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