ASoC: rsnd: remove rsnd_dma::dir

DMAEngine direction can be calculated from rsnd_dai_stream,
So, rsnd_dma::dir does not make sense now.
Let's remove it.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/sh/rcar/dma.c

@@ -87,12 +87,13 @@ static void rsnd_dmaen_start(struct rsnd_dma *dma)
 	struct snd_pcm_substream *substream = io->substream;
 	struct device *dev = rsnd_priv_to_dev(priv);
 	struct dma_async_tx_descriptor *desc;
+	int is_play = rsnd_io_is_play(io);
 
 	desc = dmaengine_prep_dma_cyclic(dma->chan,
 					 substream->runtime->dma_addr,
 					 snd_pcm_lib_buffer_bytes(substream),
 					 snd_pcm_lib_period_bytes(substream),
-					 dma->dir,
+					 is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
 					 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 
 	if (!desc) {
@@ -156,8 +157,6 @@ static int rsnd_dmaen_init(struct rsnd_priv *priv, struct rsnd_dma *dma, int id,
 	if (ret < 0)
 		goto rsnd_dma_init_err;
 
-	dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
-
 	return 0;
 
 rsnd_dma_init_err:

sound/soc/sh/rcar/rsnd.h

@@ -182,7 +182,6 @@ struct rsnd_dma_ops {
 struct rsnd_dma {
 	struct dma_chan		*chan;
 	struct rsnd_dma_ops	*ops;
-	enum dma_transfer_direction dir;
 	int			dmapp_id;
 	u32			chcr;
 	dma_addr_t		src_addr;