linux-kernel - [PATCH v6 3/7] ASoC: sun4i-i2s: Add functions for RX and TX channel enables

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Message-Id: <20191016070740.121435-4-codekipper@gmail.com>
Date:   Wed, 16 Oct 2019 09:07:36 +0200
From:   codekipper@...il.com
To:     mripard@...nel.org, wens@...e.org, linux-sunxi@...glegroups.com
Cc:     linux-arm-kernel@...ts.infradead.org, lgirdwood@...il.com,
        broonie@...nel.org, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org, be17068@...rbole.bo.it,
        Marcus Cooper <codekipper@...il.com>
Subject: [PATCH v6 3/7] ASoC: sun4i-i2s: Add functions for RX and TX channel enables

From: Marcus Cooper <codekipper@...il.com>

Newer SoCs like the H6 have the channel enable bits in a different
position to what is on the H3. As we will eventually add multi-
channel support then create function calls as opposed to regmap
fields to add support for different devices.

Signed-off-by: Marcus Cooper <codekipper@...il.com>
---
 sound/soc/sunxi/sun4i-i2s.c | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 875567881f30..8d28a386872f 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -159,6 +159,8 @@ struct sun4i_i2s_quirks {
 	int	(*set_fmt)(struct sun4i_i2s *, unsigned int);
 	void	(*set_txchanoffset)(const struct sun4i_i2s *, int);
 	void	(*set_rxchanoffset)(const struct sun4i_i2s *);
+	void	(*set_txchanen)(const struct sun4i_i2s *, int, int);
+	void	(*set_rxchanen)(const struct sun4i_i2s *, int);
 };
 
 struct sun4i_i2s {
@@ -462,9 +464,7 @@ static int sun8i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
 			   SUN8I_I2S_FMT0_LRCK_PERIOD_MASK,
 			   SUN8I_I2S_FMT0_LRCK_PERIOD(lrck_period));
 
-	regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
-			   SUN8I_I2S_TX_CHAN_EN_MASK,
-			   SUN8I_I2S_TX_CHAN_EN(channels));
+	i2s->variant->set_txchanen(i2s, 0, channels);
 
 	return 0;
 }
@@ -486,6 +486,24 @@ static void sun8i_i2s_set_rxchanoffset(const struct sun4i_i2s *i2s)
 			   SUN8I_I2S_TX_CHAN_OFFSET(i2s->offset));
 }
 
+static void sun8i_i2s_set_txchanen(const struct sun4i_i2s *i2s, int output,
+				   int channel)
+{
+	if (output >= 0 && output < 4)
+		regmap_update_bits(i2s->regmap,
+				   SUN8I_I2S_TX_CHAN_SEL_REG + (output * 4),
+				   SUN8I_I2S_TX_CHAN_EN_MASK,
+				   SUN8I_I2S_TX_CHAN_EN(channel));
+}
+
+static void sun8i_i2s_set_rxchanen(const struct sun4i_i2s *i2s, int channel)
+{
+	regmap_update_bits(i2s->regmap,
+			   SUN8I_I2S_RX_CHAN_SEL_REG,
+			   SUN8I_I2S_TX_CHAN_EN_MASK,
+			   SUN8I_I2S_TX_CHAN_EN(channel));
+}
+
 static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
 			       struct snd_pcm_hw_params *params,
 			       struct snd_soc_dai *dai)
@@ -510,6 +528,12 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
+	if (i2s->variant->set_txchanen)
+		i2s->variant->set_txchanen(i2s, 0, channels);
+
+	if (i2s->variant->set_rxchanen)
+		i2s->variant->set_rxchanen(i2s, channels);
+
 	switch (params_physical_width(params)) {
 	case 16:
 		width = DMA_SLAVE_BUSWIDTH_2_BYTES;
@@ -1155,6 +1179,8 @@ static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
 	.set_fmt		= sun8i_i2s_set_soc_fmt,
 	.set_txchanoffset	= sun8i_i2s_set_txchanoffset,
 	.set_rxchanoffset	= sun8i_i2s_set_rxchanoffset,
+	.set_txchanen		= sun8i_i2s_set_txchanen,
+	.set_rxchanen		= sun8i_i2s_set_rxchanen,
 };
 
 static const struct sun4i_i2s_quirks sun50i_a64_codec_i2s_quirks = {
-- 
2.23.0