diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-04-20 19:29:00 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-04-22 11:27:04 +0100 |
| commit | d1e1406c6ed0b92200a7de2a09fbab65661dba3c (patch) | |
| tree | b29e9b0f9c068b97e3318a5dbafa0c75cf710399 /include | |
| parent | 22f38f792ec53e2a93be13ecb609bbe911ed8ff9 (diff) | |
ASoC: generic-dmaengine-pcm: Add support for half-duplex
Some platforms which are half-duplex share the same DMA channel between the
playback and capture stream. Add support for this to the generic dmaengine PCM
driver.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/dmaengine_pcm.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h index b1d1150c1d60..f11c35cd5532 100644 --- a/include/sound/dmaengine_pcm.h +++ b/include/sound/dmaengine_pcm.h @@ -91,6 +91,11 @@ void snd_dmaengine_pcm_set_config_from_dai_data( * bytes that are still left to transfer. */ #define SND_DMAENGINE_PCM_FLAG_NO_RESIDUE BIT(2) +/* + * The PCM is half duplex and the DMA channel is shared between capture and + * playback. + */ +#define SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX BIT(3) /** * struct snd_dmaengine_pcm_config - Configuration data for dmaengine based PCM |