ASoC: rsnd: SSI + DMA can select BUSIF

Sound data needs to be sent to R-Car sound SSI when playback.
But, there are 2 interfaces for it.
1st is SSITDR/SSIRDR which are mapped on SSI.
2nd is SSIn_BUSIF which are mapped on SSIU.

2nd SSIn_BUSIF is used when DMA transfer,
and it is always used if sound data came from via SRC.
But, we can use it when SSI+DMA case too.
(Current driver is assuming 1st SSITDR/SSIRDR for it)

2nd SSIn_BUSIF can be used as FIFO.
This is very helpful/useful for SSI+DMA.

But DMA address / DMA ID are not same between 1st/2nd cases.
This patch care about these settings.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/sound/rcar_snd.h b/include/sound/rcar_snd.h
index f4a706f82cb7..d76412b84b48 100644
--- a/include/sound/rcar_snd.h
+++ b/include/sound/rcar_snd.h
@@ -34,6 +34,7 @@
  * B : SSI direction
  */
 #define RSND_SSI_CLK_PIN_SHARE          (1 << 31)
+#define RSND_SSI_NO_BUSIF               (1 << 30) /* SSI+DMA without BUSIF */
 
 #define RSND_SSI(_dma_id, _pio_irq, _flags)             \
 { .dma_id = _dma_id, .pio_irq = _pio_irq, .flags = _flags }