ASoC: rsnd: SSI supports DMA transfer via BUSIF

This patch adds BUSIF support for R-Car sound DMAEngine transfer.
The sound data will be transferred via FIFO which can cover blank time
which will happen when DMA channel is switching.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/include/sound/rcar_snd.h b/include/sound/rcar_snd.h
index a72687dda0cd..d35412ae03b3 100644
--- a/include/sound/rcar_snd.h
+++ b/include/sound/rcar_snd.h
@@ -36,6 +36,7 @@
 #define RSND_SSI_CLK_PIN_SHARE          (1 << 31)
 #define RSND_SSI_CLK_FROM_ADG           (1 << 30) /* clock parent is master */
 #define RSND_SSI_SYNC                   (1 << 29) /* SSI34_sync etc */
+#define RSND_SSI_DEPENDENT              (1 << 28) /* SSI needs SRU/SCU */
 
 #define RSND_SSI_PLAY                   (1 << 24)
 
@@ -51,6 +52,11 @@ struct rsnd_ssi_platform_info {
         u32 flags;
 };
 
+/*
+ * flags
+ */
+#define RSND_SCU_USB_HPBIF              (1 << 31) /* it needs RSND_SSI_DEPENDENT */
+
 struct rsnd_scu_platform_info {
         u32 flags;
 };