ASoC: rsnd: add Gen2 SRC and DMAEngine support

Renesas sound Gen2 has SRC (= Sampling Rate Converter)
which needs 2 DMAC.
The data path image when you use SRC on Gen2 is

[mem] -> Audio-DMAC -> SRC -> Audio-DMAC-peri-peri -> SSIU -> SSI

This patch support SRC and DMAEnine.
It is tested on R-Car H2 Lager board

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 1d19bfc2486d..2be05aea54f9 100644
--- a/include/sound/rcar_snd.h
+++ b/include/sound/rcar_snd.h
@@ -56,9 +56,15 @@ struct rsnd_ssi_platform_info {
  */
 #define RSND_SCU_USE_HPBIF              (1 << 31) /* it needs RSND_SSI_DEPENDENT */
 
+#define RSND_SCU_SET(rate, _dma_id)             \
+        { .flags = RSND_SCU_USE_HPBIF, .convert_rate = rate, .dma_id = _dma_id, }
+#define RSND_SCU_UNUSED                         \
+        { .flags = 0, .convert_rate = 0, .dma_id = 0, }
+
 struct rsnd_scu_platform_info {
         u32 flags;
         u32 convert_rate; /* sampling rate convert */
+        int dma_id; /* for Gen2 SCU */
 };
 
 /*