patches.renesas/0800-ASoC-rsnd-care-detail-of-SRC_BSDSR.patch

From 9415fe2ed03e4cd9d5095eefebd5db791f257651 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Wed, 30 Jul 2014 23:52:04 -0700
Subject: ASoC: rsnd: care detail of SRC_BSDSR

Driver should care more detail of SRC_BSDSR settings.
The sound includes noise without this patch
if it used SRC.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
(cherry picked from commit 054cd7f4b986a941b56372b743602f7df6569c98)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
 sound/soc/sh/rcar/src.c | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c
index 4d39505c21cf..1ef811a26bd7 100644
--- a/sound/soc/sh/rcar/src.c
+++ b/sound/soc/sh/rcar/src.c
@@ -483,15 +483,45 @@ static struct rsnd_mod_ops rsnd_src_gen1_ops = {
 static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod *mod,
 					  struct rsnd_dai *rdai)
 {
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
+	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+	struct rsnd_src *src = rsnd_mod_to_src(mod);
+	uint ratio;
 	int ret;
 
+	/* 6 - 1/6 are very enough ratio for SRC_BSDSR */
+	if (!rsnd_src_convert_rate(src))
+		ratio = 0;
+	else if (rsnd_src_convert_rate(src) > runtime->rate)
+		ratio = 100 * rsnd_src_convert_rate(src) / runtime->rate;
+	else
+		ratio = 100 * runtime->rate / rsnd_src_convert_rate(src);
+
+	if (ratio > 600) {
+		dev_err(dev, "FSO/FSI ratio error\n");
+		return -EINVAL;
+	}
+
 	ret = rsnd_src_set_convert_rate(mod, rdai);
 	if (ret < 0)
 		return ret;
 
 	rsnd_mod_write(mod, SRC_SRCCR, 0x00011110);
 
-	rsnd_mod_write(mod, SRC_BSDSR, 0x01800000);
+	switch (rsnd_mod_id(mod)) {
+	case 5:
+	case 6:
+	case 7:
+	case 8:
+		rsnd_mod_write(mod, SRC_BSDSR, 0x02400000);
+		break;
+	default:
+		rsnd_mod_write(mod, SRC_BSDSR, 0x01800000);
+		break;
+	}
+
 	rsnd_mod_write(mod, SRC_BSISR, 0x00100060);
 
 	return 0;
-- 
2.1.2