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ASoC: Document snd-soc-dummy-dai purpose 

Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Anatol Pomozov 2015-08-31 08:24:23 -07:00 committed by Mark Brown
parent bc0195aad0
commit d76f41982f
1 changed files with 9 additions and 0 deletions
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9
sound/soc/soc-utils.c
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@ -101,6 +101,15 @@ static struct snd_soc_codec_driver dummy_codec;
SNDRV_PCM_FMTBIT_S32_LE | \
SNDRV_PCM_FMTBIT_U32_LE | \
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
/*
* The dummy CODEC is only meant to be used in situations where there is no
* actual hardware.
*
* If there is actual hardware even if it does not have a control bus
* the hardware will still have constraints like supported samplerates, etc.
* which should be modelled. And the data flow graph also should be modelled
* using DAPM.
*/
static struct snd_soc_dai_driver dummy_dai = {
.name = "snd-soc-dummy-dai",
.playback = {