Applied "ASoC: rsnd: cleanup pointer related code" to the asoc tree

[Mark Brown <broonie@kernel.org>]

The patch

   ASoC: rsnd: cleanup pointer related code

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From a97a06c7efc1ee34f500171f1c4e9608295bb79a Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Wed, 7 Jun 2017 00:20:47 +0000
Subject: [PATCH] ASoC: rsnd: cleanup pointer related code

Current rsnd driver is sharing pointer related code between
PIO / DMA. But, it is used only PIO mode now, no longer needed.
This patch cleanup these.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/sh/rcar/core.c | 42 ------------------------------
 sound/soc/sh/rcar/dma.c  |  6 +----
 sound/soc/sh/rcar/rsnd.h |  6 -----
 sound/soc/sh/rcar/ssi.c  | 67 +++++++++++++++++++++++++++++++++++++++++++++---
 4 files changed, 65 insertions(+), 56 deletions(-)

diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index 7a8c08933503..7c68f9d4a0ed 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -551,40 +551,6 @@ static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 /*
  *	rsnd_soc_dai functions
  */
-int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
-{
-	struct snd_pcm_substream *substream = io->substream;
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	int pos = io->byte_pos + additional;
-
-	pos %= (runtime->periods * io->byte_per_period);
-
-	return pos;
-}
-
-bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
-{
-	io->byte_pos += byte;
-
-	if (io->byte_pos >= io->next_period_byte) {
-		struct snd_pcm_substream *substream = io->substream;
-		struct snd_pcm_runtime *runtime = substream->runtime;
-
-		io->period_pos++;
-		io->next_period_byte += io->byte_per_period;
-
-		if (io->period_pos >= runtime->periods) {
-			io->byte_pos = 0;
-			io->period_pos = 0;
-			io->next_period_byte = io->byte_per_period;
-		}
-
-		return true;
-	}
-
-	return false;
-}
-
 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
 {
 	struct snd_pcm_substream *substream = io->substream;
@@ -602,15 +568,7 @@ void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 				struct snd_pcm_substream *substream)
 {
-	struct snd_pcm_runtime *runtime = substream->runtime;
-
 	io->substream		= substream;
-	io->byte_pos		= 0;
-	io->period_pos		= 0;
-	io->byte_per_period	= runtime->period_size *
-				  runtime->channels *
-				  samples_to_bytes(runtime, 1);
-	io->next_period_byte	= io->byte_per_period;
 }
 
 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
diff --git a/sound/soc/sh/rcar/dma.c b/sound/soc/sh/rcar/dma.c
index 05e538f4c8d5..60aa5e96a49f 100644
--- a/sound/soc/sh/rcar/dma.c
+++ b/sound/soc/sh/rcar/dma.c
@@ -104,10 +104,6 @@ static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
 	 * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 	 * But, Audio-DMAC-peri-peri doesn't have interrupt,
 	 * and this driver is assuming that here.
-	 *
-	 * If Audio-DMAC-peri-peri has interrpt,
-	 * rsnd_dai_pointer_update() will be called twice,
-	 * ant it will breaks io->byte_pos
 	 */
 	spin_lock_irqsave(&priv->lock, flags);
 
@@ -122,7 +118,7 @@ static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
 		 */
 		rsnd_dmaen_sync(dmaen, io, dmaen->dma_cnt + 2);
 
-		elapsed = rsnd_dai_pointer_update(io, io->byte_per_period);
+		elapsed = true;
 
 		dmaen->dma_cnt++;
 	}
diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h
index bd8def0bc212..6de5f7ec6464 100644
--- a/sound/soc/sh/rcar/rsnd.h
+++ b/sound/soc/sh/rcar/rsnd.h
@@ -432,10 +432,6 @@ struct rsnd_dai_stream {
 	struct rsnd_mod *mod[RSND_MOD_MAX];
 	struct rsnd_dai *rdai;
 	u32 parent_ssi_status;
-	int byte_pos;
-	int period_pos;
-	int byte_per_period;
-	int next_period_byte;
 };
 #define rsnd_io_to_mod(io, i)	((i) < RSND_MOD_MAX ? (io)->mod[(i)] : NULL)
 #define rsnd_io_to_mod_ssi(io)	rsnd_io_to_mod((io), RSND_MOD_SSI)
@@ -480,9 +476,7 @@ struct rsnd_dai {
 
 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id);
 
-bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int cnt);
 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io);
-int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional);
 int rsnd_dai_connect(struct rsnd_mod *mod,
 		     struct rsnd_dai_stream *io,
 		     enum rsnd_mod_type type);
diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index 59ca6e3f46bc..f7df3b5e2985 100644
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -77,6 +77,11 @@ struct rsnd_ssi {
 	int rate;
 	int irq;
 	unsigned int usrcnt;
+
+	int byte_pos;
+	int period_pos;
+	int byte_per_period;
+	int next_period_byte;
 };
 
 /* flags */
@@ -374,6 +379,59 @@ static void rsnd_ssi_register_setup(struct rsnd_mod *mod)
 					ssi->cr_mode); /* without EN */
 }
 
+static void rsnd_ssi_pointer_init(struct rsnd_mod *mod,
+				  struct rsnd_dai_stream *io)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+
+	ssi->byte_pos		= 0;
+	ssi->period_pos		= 0;
+	ssi->byte_per_period	= runtime->period_size *
+				  runtime->channels *
+				  samples_to_bytes(runtime, 1);
+	ssi->next_period_byte	= ssi->byte_per_period;
+}
+
+static int rsnd_ssi_pointer_offset(struct rsnd_mod *mod,
+				   struct rsnd_dai_stream *io,
+				   int additional)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+	int pos = ssi->byte_pos + additional;
+
+	pos %= (runtime->periods * ssi->byte_per_period);
+
+	return pos;
+}
+
+static bool rsnd_ssi_pointer_update(struct rsnd_mod *mod,
+				    struct rsnd_dai_stream *io,
+				    int byte)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+
+	ssi->byte_pos += byte;
+
+	if (ssi->byte_pos >= ssi->next_period_byte) {
+		struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+
+		ssi->period_pos++;
+		ssi->next_period_byte += ssi->byte_per_period;
+
+		if (ssi->period_pos >= runtime->periods) {
+			ssi->byte_pos = 0;
+			ssi->period_pos = 0;
+			ssi->next_period_byte = ssi->byte_per_period;
+		}
+
+		return true;
+	}
+
+	return false;
+}
+
 /*
  *	SSI mod common functions
  */
@@ -387,6 +445,8 @@ static int rsnd_ssi_init(struct rsnd_mod *mod,
 	if (!rsnd_ssi_is_run_mods(mod, io))
 		return 0;
 
+	rsnd_ssi_pointer_init(mod, io);
+
 	ssi->usrcnt++;
 
 	rsnd_mod_power_on(mod);
@@ -566,7 +626,7 @@ static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
 	if (!is_dma && (status & DIRQ)) {
 		struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 		u32 *buf = (u32 *)(runtime->dma_area +
-				   rsnd_dai_pointer_offset(io, 0));
+				   rsnd_ssi_pointer_offset(mod, io, 0));
 		int shift = 0;
 
 		switch (runtime->sample_bits) {
@@ -585,7 +645,7 @@ static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
 		else
 			*buf = (rsnd_mod_read(mod, SSIRDR) >> shift);
 
-		elapsed = rsnd_dai_pointer_update(io, sizeof(*buf));
+		elapsed = rsnd_ssi_pointer_update(mod, io, sizeof(*buf));
 	}
 
 	/* DMA only */
@@ -696,9 +756,10 @@ static int rsnd_ssi_pointer(struct rsnd_mod *mod,
 			    struct rsnd_dai_stream *io,
 			    snd_pcm_uframes_t *pointer)
 {
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
 	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 
-	*pointer = bytes_to_frames(runtime, io->byte_pos);
+	*pointer = bytes_to_frames(runtime, ssi->byte_pos);
 
 	return 0;
 }
-- 
2.11.0