[alsa-devel] Applied "ASoC: rsnd: enable clock-frequency for both 44.1kHz/48kHz" to the asoc tree

[Mark Brown]

The patch

   ASoC: rsnd: enable clock-frequency for both 44.1kHz/48kHz

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 25165f79adc76b812bfb4d8f2ab120aafb28d0e6 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
Date: Wed, 19 Apr 2017 00:45:52 +0000
Subject: [PATCH] ASoC: rsnd: enable clock-frequency for both 44.1kHz/48kHz

Current clock-frequency allows only 1 clock, but ADG can
handle both 44.1kHz/48kHz base clocks. This patch enables these.

On Salvator-X board, AUDIO_CLKOUT which is generated by ADG
is connected to ak4613 MCKI, and it should be synchronized with
LRCK. Thus, we need both 44.1kHz/48kHz base clock-frequency.
Otherwise, either one sounds strange in high frequency sound.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx at renesas.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/sh/rcar/adg.c | 39 ++++++++++++++++++++++++++-------------
 1 file changed, 26 insertions(+), 13 deletions(-)

diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c
index 214a9ce90bb4..96fef91b480c 100644
--- a/sound/soc/sh/rcar/adg.c
+++ b/sound/soc/sh/rcar/adg.c
@@ -43,6 +43,7 @@ struct rsnd_adg {
 };
 
 #define LRCLK_ASYNC	(1 << 0)
+#define AUDIO_OUT_48	(1 << 1)
 #define adg_mode_flags(adg)	(adg->flags)
 
 #define for_each_rsnd_clk(pos, adg, i)		\
@@ -364,7 +365,10 @@ int rsnd_adg_ssi_clk_try_start(struct rsnd_mod *ssi_mod, unsigned int rate)
 
 	rsnd_adg_set_ssi_clk(ssi_mod, data);
 
-	if (!(adg_mode_flags(adg) & LRCLK_ASYNC)) {
+	if (adg_mode_flags(adg) & LRCLK_ASYNC) {
+		if (adg_mode_flags(adg) & AUDIO_OUT_48)
+			ckr = 0x80000000;
+	} else {
 		if (0 == (rate % 8000))
 			ckr = 0x80000000;
 	}
@@ -427,11 +431,14 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 	struct clk *clk;
 	struct device *dev = rsnd_priv_to_dev(priv);
 	struct device_node *np = dev->of_node;
+	struct property *prop;
 	u32 ckr, rbgx, rbga, rbgb;
-	u32 rate, req_rate = 0, div;
+	u32 rate, div;
+#define REQ_SIZE 2
+	u32 req_rate[REQ_SIZE] = {};
 	uint32_t count = 0;
 	unsigned long req_48kHz_rate, req_441kHz_rate;
-	int i;
+	int i, req_size;
 	const char *parent_clk_name = NULL;
 	static const char * const clkout_name[] = {
 		[CLKOUT]  = "audio_clkout",
@@ -452,13 +459,18 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 	 * ADG supports BRRA/BRRB output only
 	 * this means all clkout0/1/2/3 will be same rate
 	 */
-	of_property_read_u32(np, "clock-frequency", &req_rate);
+	prop = of_find_property(np, "clock-frequency", NULL);;
+	req_size = prop->length / sizeof(u32);
+
+	of_property_read_u32_array(np, "clock-frequency", req_rate, req_size);
 	req_48kHz_rate = 0;
 	req_441kHz_rate = 0;
-	if (0 == (req_rate % 44100))
-		req_441kHz_rate = req_rate;
-	if (0 == (req_rate % 48000))
-		req_48kHz_rate = req_rate;
+	for (i = 0; i < req_size; i++) {
+		if (0 == (req_rate[i] % 44100))
+			req_441kHz_rate = req_rate[i];
+		if (0 == (req_rate[i] % 48000))
+			req_48kHz_rate = req_rate[i];
+	}
 
 	/*
 	 * This driver is assuming that AUDIO_CLKA/AUDIO_CLKB/AUDIO_CLKC
@@ -505,10 +517,8 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 				rbgb = rbgx;
 				adg->rbgb_rate_for_48khz = rate / div;
 				ckr |= brg_table[i] << 16;
-				if (req_48kHz_rate) {
+				if (req_48kHz_rate)
 					parent_clk_name = __clk_get_name(clk);
-					ckr |= 0x80000000;
-				}
 			}
 		}
 	}
@@ -523,7 +533,7 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 	 */
 	if (!count) {
 		clk = clk_register_fixed_rate(dev, clkout_name[CLKOUT],
-					      parent_clk_name, 0, req_rate);
+					      parent_clk_name, 0, req_rate[0]);
 		if (!IS_ERR(clk)) {
 			adg->clkout[CLKOUT] = clk;
 			of_clk_add_provider(np, of_clk_src_simple_get, clk);
@@ -536,7 +546,7 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 		for (i = 0; i < CLKOUTMAX; i++) {
 			clk = clk_register_fixed_rate(dev, clkout_name[i],
 						      parent_clk_name, 0,
-						      req_rate);
+						      req_rate[0]);
 			adg->clkout[i] = ERR_PTR(-ENOENT);
 			if (!IS_ERR(clk))
 				adg->clkout[i] = clk;
@@ -551,6 +561,9 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv,
 	adg->rbga = rbga;
 	adg->rbgb = rbgb;
 
+	if (req_rate[0] % 48000 == 0)
+		adg->flags = AUDIO_OUT_48;
+
 	for_each_rsnd_clkout(clk, adg, i)
 		dev_dbg(dev, "clkout %d : %p : %ld\n", i, clk, clk_get_rate(clk));
 	dev_dbg(dev, "BRGCKR = 0x%08x, BRRA/BRRB = 0x%x/0x%x\n",
-- 
2.11.0