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Subject[PATCH linux-next 01/10] ASoC: rsnd: ssi: Request dedicated dma channels for busif1 to 7
Date
From: Jiada Wang <jiada_wang@mentor.com>

Currently ssi driver only request dma channel for SSI_0,
which is used to transfer data to/from busif0.

But since busif1 to busif7 also maybe used, dedicated dma channels
are request for data transfer between these busif.

Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
sound/soc/sh/rcar/ssi.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index 3adcc4f778f7..75a3d15084c2 100644
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -76,6 +76,8 @@

#define SSI_NAME "ssi"

+#define SSI_DMA_NAME_SIZE 10
+
struct rsnd_ssi {
struct rsnd_mod mod;

@@ -938,12 +940,20 @@ static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io,
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
int is_play = rsnd_io_is_play(io);
- char *name;
+ int busif = rsnd_ssi_get_busif(io);
+ char name[SSI_DMA_NAME_SIZE];

- if (rsnd_ssi_use_busif(io))
- name = is_play ? "rxu" : "txu";
- else
- name = is_play ? "rx" : "tx";
+ if (rsnd_ssi_use_busif(io)) {
+ if (is_play)
+ snprintf(name, SSI_DMA_NAME_SIZE, "rxu%d", busif);
+ else
+ snprintf(name, SSI_DMA_NAME_SIZE, "txu%d", busif);
+ } else {
+ if (is_play)
+ snprintf(name, SSI_DMA_NAME_SIZE, "rx");
+ else
+ snprintf(name, SSI_DMA_NAME_SIZE, "tx");
+ }

return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
mod, name);
--
2.17.0
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