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From dd7acd3130abc9664ae6bd2a00517b3b82c16c05 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Wed, 15 Jul 2015 07:16:56 +0000
Subject: [PATCH 304/326] ASoC: rsnd: update Audio DMA path search method
Current rsnd driver is assuming Audio DMAC / Audio DMAC peri peri
are used from SSI/SSIU/SRC/DVC. But we will add CTU/MIX to this driver.
Then, current DMA path searching method is not understandable, and good
enough for this purpose. This patch update DMA path search method, more
simply.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
(cherry picked from commit 7dfb49194557ccf27ab99c8c04c021320e7ae458)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
sound/soc/sh/rcar/dma.c | 88 +++++++++++++++++++++++++++++--------------------
1 file changed, 53 insertions(+), 35 deletions(-)
diff --git a/sound/soc/sh/rcar/dma.c b/sound/soc/sh/rcar/dma.c
index a175863d239c..23282f48f71f 100644
--- a/sound/soc/sh/rcar/dma.c
+++ b/sound/soc/sh/rcar/dma.c
@@ -494,7 +494,7 @@ static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io,
return rsnd_gen2_dma_addr(io, mod, is_play, is_from);
}
-#define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
+#define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */
static void rsnd_dma_of_path(struct rsnd_dma *dma,
struct rsnd_dai_stream *io,
int is_play,
@@ -506,53 +506,71 @@ static void rsnd_dma_of_path(struct rsnd_dma *dma,
struct rsnd_mod *src = rsnd_io_to_mod_src(io);
struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
struct rsnd_mod *mod[MOD_MAX];
- int i, index;
+ struct rsnd_mod *mod_start, *mod_end;
+ struct rsnd_priv *priv = rsnd_mod_to_priv(this);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ int nr, i;
+ if (!ssi)
+ return;
- for (i = 0; i < MOD_MAX; i++)
+ nr = 0;
+ for (i = 0; i < MOD_MAX; i++) {
mod[i] = NULL;
+ nr += !!rsnd_io_to_mod(io, i);
+ }
/*
- * in play case...
+ * [S] -*-> [E]
+ * [S] -*-> SRC -o-> [E]
+ * [S] -*-> SRC -> DVC -o-> [E]
+ * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E]
+ *
+ * playback [S] = mem
+ * [E] = SSI
*
- * src -> dst
+ * capture [S] = SSI
+ * [E] = mem
*
- * mem -> SSI
- * mem -> SRC -> SSI
- * mem -> SRC -> DVC -> SSI
+ * -*-> Audio DMAC
+ * -o-> Audio DMAC peri peri
*/
- mod[0] = NULL; /* for "mem" */
- index = 1;
- for (i = 1; i < MOD_MAX; i++) {
- if (!src) {
- mod[i] = ssi;
- } else if (!dvc) {
- mod[i] = src;
- src = NULL;
- } else {
- if ((!is_play) && (this == src))
- this = dvc;
+ mod_start = (is_play) ? NULL : ssi;
+ mod_end = (is_play) ? ssi : NULL;
- mod[i] = (is_play) ? src : dvc;
- i++;
- mod[i] = (is_play) ? dvc : src;
+ mod[0] = mod_start;
+ for (i = 1; i < nr; i++) {
+ if (src) {
+ mod[i] = src;
src = NULL;
+ } else if (dvc) {
+ mod[i] = dvc;
dvc = NULL;
}
-
- if (mod[i] == this)
- index = i;
-
- if (mod[i] == ssi)
- break;
}
+ mod[i] = mod_end;
- if (is_play) {
- *mod_from = mod[index - 1];
- *mod_to = mod[index];
+ /*
+ * | SSI | SRC |
+ * -------------+-----+-----+
+ * is_play | o | * |
+ * !is_play | * | o |
+ */
+ if ((this == ssi) == (is_play)) {
+ *mod_from = mod[nr - 1];
+ *mod_to = mod[nr];
} else {
- *mod_from = mod[index];
- *mod_to = mod[index - 1];
+ *mod_from = mod[0];
+ *mod_to = mod[1];
+ }
+
+ dev_dbg(dev, "module connection (this is %s[%d])\n",
+ rsnd_mod_name(this), rsnd_mod_id(this));
+ for (i = 0; i <= nr; i++) {
+ dev_dbg(dev, " %s[%d]%s\n",
+ rsnd_mod_name(mod[i]), rsnd_mod_id(mod[i]),
+ (mod[i] == *mod_from) ? " from" :
+ (mod[i] == *mod_to) ? " to" : "");
}
}
@@ -580,8 +598,8 @@ void rsnd_dma_quit(struct rsnd_dai_stream *io, struct rsnd_dma *dma)
int rsnd_dma_init(struct rsnd_dai_stream *io, struct rsnd_dma *dma, int id)
{
- struct rsnd_mod *mod_from;
- struct rsnd_mod *mod_to;
+ struct rsnd_mod *mod_from = NULL;
+ struct rsnd_mod *mod_to = NULL;
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
struct device *dev = rsnd_priv_to_dev(priv);
--
2.6.2
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