ASoC: sun4i-i2s: Move the channel configuration to a callback

The two main generations of our I2S controller require a slightly different
channel configuration, mostly because of a quite different register layout
and some additional registers being needed on the newer generation.

This used to be controlled through a bunch of booleans, however this proved
to be quite impractical, especially since a bunch of SoCs forgot to set
those parameters and therefore were broken from that point of view.

Fixes: 21faaea1 ("ASoC: sun4i-i2s: Add support for A83T")
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://lore.kernel.org/r/6414463de69584e8227fa495b13aa5f4798e1f0e.1566242458.git-series.maxime.ripard@bootlin.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sunxi/sun4i-i2s.c

@@ -80,6 +80,7 @@
 #define SUN4I_I2S_TX_CNT_REG		0x2c
 
 #define SUN4I_I2S_TX_CHAN_SEL_REG	0x30
+#define SUN4I_I2S_CHAN_SEL_MASK			GENMASK(2, 0)
 #define SUN4I_I2S_CHAN_SEL(num_chan)		(((num_chan) - 1) << 0)
 
 #define SUN4I_I2S_TX_CHAN_MAP_REG	0x34
@@ -122,8 +123,6 @@ struct sun4i_i2s;
  * @has_reset: SoC needs reset deasserted.
  * @has_slave_select_bit: SoC has a bit to enable slave mode.
  * @has_fmt_set_lrck_period: SoC requires lrclk period to be set.
- * @has_chcfg: tx and rx slot number need to be set.
- * @has_chsel_tx_chen: SoC requires that the tx channels are enabled.
  * @has_chsel_offset: SoC uses offset for selecting dai operational mode.
  * @reg_offset_txdata: offset of the tx fifo.
  * @sun4i_i2s_regmap: regmap config to use.
@@ -135,17 +134,11 @@ struct sun4i_i2s;
  * @field_fmt_bclk: regmap field to set clk polarity.
  * @field_fmt_lrclk: regmap field to set frame polarity.
  * @field_fmt_mode: regmap field to set the operational mode.
- * @field_txchanmap: location of the tx channel mapping register.
- * @field_rxchanmap: location of the rx channel mapping register.
- * @field_txchansel: location of the tx channel select bit fields.
- * @field_rxchansel: location of the rx channel select bit fields.
  */
 struct sun4i_i2s_quirks {
 	bool				has_reset;
 	bool				has_slave_select_bit;
 	bool				has_fmt_set_lrck_period;
-	bool				has_chcfg;
-	bool				has_chsel_tx_chen;
 	bool				has_chsel_offset;
 	unsigned int			reg_offset_txdata;	/* TX FIFO */
 	const struct regmap_config	*sun4i_i2s_regmap;
@@ -159,13 +152,11 @@ struct sun4i_i2s_quirks {
 	struct reg_field		field_fmt_bclk;
 	struct reg_field		field_fmt_lrclk;
 	struct reg_field		field_fmt_mode;
-	struct reg_field		field_txchanmap;
-	struct reg_field		field_rxchanmap;
-	struct reg_field		field_txchansel;
-	struct reg_field		field_rxchansel;
 
 	s8	(*get_sr)(const struct sun4i_i2s *, int);
 	s8	(*get_wss)(const struct sun4i_i2s *, int);
+	int	(*set_chan_cfg)(const struct sun4i_i2s *,
+				const struct snd_pcm_hw_params *);
 };
 
 struct sun4i_i2s {
@@ -186,10 +177,6 @@ struct sun4i_i2s {
 	struct regmap_field	*field_fmt_bclk;
 	struct regmap_field	*field_fmt_lrclk;
 	struct regmap_field	*field_fmt_mode;
-	struct regmap_field	*field_txchanmap;
-	struct regmap_field	*field_rxchanmap;
-	struct regmap_field	*field_txchansel;
-	struct regmap_field	*field_rxchansel;
 
 	const struct sun4i_i2s_quirks	*variant;
 };
@@ -380,45 +367,78 @@ static s8 sun8i_i2s_get_sr_wss(const struct sun4i_i2s *i2s, int width)
 	return (width - 8) / 4 + 1;
 }
 
-static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
-			       struct snd_pcm_hw_params *params,
-			       struct snd_soc_dai *dai)
+static int sun4i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
+				  const struct snd_pcm_hw_params *params)
 {
-	struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
-	int sr, wss, channels;
-	u32 width;
+	unsigned int channels = params_channels(params);
 
-	channels = params_channels(params);
-	if (channels != 2) {
-		dev_err(dai->dev, "Unsupported number of channels: %d\n",
-			channels);
+	if (channels != 2)
 		return -EINVAL;
-	}
 
-	if (i2s->variant->has_chcfg) {
-		regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
-				   SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK,
-				   SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(channels));
-		regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
-				   SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK,
-				   SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(channels));
-	}
+	/* Map the channels for playback and capture */
+	regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210);
+	regmap_write(i2s->regmap, SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210);
+
+	/* Configure the channels */
+	regmap_update_bits(i2s->regmap, SUN4I_I2S_TX_CHAN_SEL_REG,
+			   SUN4I_I2S_CHAN_SEL_MASK,
+			   SUN4I_I2S_CHAN_SEL(channels));
+	regmap_update_bits(i2s->regmap, SUN4I_I2S_RX_CHAN_SEL_REG,
+			   SUN4I_I2S_CHAN_SEL_MASK,
+			   SUN4I_I2S_CHAN_SEL(channels));
+
+	return 0;
+}
+
+static int sun8i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
+				  const struct snd_pcm_hw_params *params)
+{
+	unsigned int channels = params_channels(params);
+
+	if (channels != 2)
+		return -EINVAL;
 
 	/* Map the channels for playback and capture */
-	regmap_field_write(i2s->field_txchanmap, 0x76543210);
-	regmap_field_write(i2s->field_rxchanmap, 0x00003210);
+	regmap_write(i2s->regmap, SUN8I_I2S_TX_CHAN_MAP_REG, 0x76543210);
+	regmap_write(i2s->regmap, SUN8I_I2S_RX_CHAN_MAP_REG, 0x76543210);
 
 	/* Configure the channels */
-	regmap_field_write(i2s->field_txchansel,
+	regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
+			   SUN4I_I2S_CHAN_SEL_MASK,
 			   SUN4I_I2S_CHAN_SEL(channels));
-	regmap_field_write(i2s->field_rxchansel,
+
+	regmap_update_bits(i2s->regmap, SUN8I_I2S_RX_CHAN_SEL_REG,
+			   SUN4I_I2S_CHAN_SEL_MASK,
 			   SUN4I_I2S_CHAN_SEL(channels));
 
-	if (i2s->variant->has_chsel_tx_chen)
+	regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
+			   SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK,
+			   SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(channels));
+	regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
+			   SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK,
+			   SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(channels));
+
 	regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
 			   SUN8I_I2S_TX_CHAN_EN_MASK,
 			   SUN8I_I2S_TX_CHAN_EN(channels));
 
+	return 0;
+}
+
+static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
+			       struct snd_pcm_hw_params *params,
+			       struct snd_soc_dai *dai)
+{
+	struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	int ret, sr, wss;
+	u32 width;
+
+	ret = i2s->variant->set_chan_cfg(i2s, params);
+	if (ret < 0) {
+		dev_err(dai->dev, "Invalid channel configuration\n");
+		return ret;
+	}
+
 	switch (params_physical_width(params)) {
 	case 16:
 		width = DMA_SLAVE_BUSWIDTH_2_BYTES;
@@ -915,12 +935,9 @@ static const struct sun4i_i2s_quirks sun4i_a10_i2s_quirks = {
 	.field_fmt_lrclk	= REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
 	.has_slave_select_bit	= true,
 	.field_fmt_mode		= REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
-	.field_txchanmap	= REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
-	.field_rxchanmap	= REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
-	.field_txchansel	= REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
-	.field_rxchansel	= REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
 	.get_sr			= sun4i_i2s_get_sr,
 	.get_wss		= sun4i_i2s_get_wss,
+	.set_chan_cfg		= sun4i_i2s_set_chan_cfg,
 };
 
 static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
@@ -934,12 +951,9 @@ static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
 	.field_fmt_lrclk	= REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
 	.has_slave_select_bit	= true,
 	.field_fmt_mode		= REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
-	.field_txchanmap	= REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
-	.field_rxchanmap	= REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
-	.field_txchansel	= REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
-	.field_rxchansel	= REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
 	.get_sr			= sun4i_i2s_get_sr,
 	.get_wss		= sun4i_i2s_get_wss,
+	.set_chan_cfg		= sun4i_i2s_set_chan_cfg,
 };
 
 static const struct sun4i_i2s_quirks sun8i_a83t_i2s_quirks = {
@@ -953,12 +967,9 @@ static const struct sun4i_i2s_quirks sun8i_a83t_i2s_quirks = {
 	.field_fmt_lrclk	= REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
 	.has_slave_select_bit	= true,
 	.field_fmt_mode		= REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
-	.field_txchanmap	= REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
-	.field_rxchanmap	= REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
-	.field_txchansel	= REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
-	.field_rxchansel	= REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
 	.get_sr			= sun8i_i2s_get_sr_wss,
 	.get_wss		= sun8i_i2s_get_sr_wss,
+	.set_chan_cfg		= sun8i_i2s_set_chan_cfg,
 };
 
 static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
@@ -968,8 +979,6 @@ static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
 	.mclk_offset		= 1,
 	.bclk_offset		= 2,
 	.has_fmt_set_lrck_period = true,
-	.has_chcfg		= true,
-	.has_chsel_tx_chen	= true,
 	.has_chsel_offset	= true,
 	.field_clkdiv_mclk_en	= REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 8, 8),
 	.field_fmt_wss		= REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
@@ -977,12 +986,9 @@ static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
 	.field_fmt_bclk		= REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
 	.field_fmt_lrclk	= REG_FIELD(SUN4I_I2S_FMT0_REG, 19, 19),
 	.field_fmt_mode		= REG_FIELD(SUN4I_I2S_CTRL_REG, 4, 5),
-	.field_txchanmap	= REG_FIELD(SUN8I_I2S_TX_CHAN_MAP_REG, 0, 31),
-	.field_rxchanmap	= REG_FIELD(SUN8I_I2S_RX_CHAN_MAP_REG, 0, 31),
-	.field_txchansel	= REG_FIELD(SUN8I_I2S_TX_CHAN_SEL_REG, 0, 2),
-	.field_rxchansel	= REG_FIELD(SUN8I_I2S_RX_CHAN_SEL_REG, 0, 2),
 	.get_sr			= sun8i_i2s_get_sr_wss,
 	.get_wss		= sun8i_i2s_get_sr_wss,
+	.set_chan_cfg		= sun8i_i2s_set_chan_cfg,
 };
 
 static const struct sun4i_i2s_quirks sun50i_a64_codec_i2s_quirks = {
@@ -996,12 +1002,9 @@ static const struct sun4i_i2s_quirks sun50i_a64_codec_i2s_quirks = {
 	.field_fmt_bclk		= REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
 	.field_fmt_lrclk	= REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
 	.field_fmt_mode		= REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
-	.field_txchanmap	= REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
-	.field_rxchanmap	= REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
-	.field_txchansel	= REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
-	.field_rxchansel	= REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
 	.get_sr			= sun4i_i2s_get_sr,
 	.get_wss		= sun4i_i2s_get_wss,
+	.set_chan_cfg		= sun4i_i2s_set_chan_cfg,
 };
 
 static int sun4i_i2s_init_regmap_fields(struct device *dev,
@@ -1043,28 +1046,7 @@ static int sun4i_i2s_init_regmap_fields(struct device *dev,
 	if (IS_ERR(i2s->field_fmt_mode))
 		return PTR_ERR(i2s->field_fmt_mode);
 
-	i2s->field_txchanmap =
-			devm_regmap_field_alloc(dev, i2s->regmap,
-						i2s->variant->field_txchanmap);
-	if (IS_ERR(i2s->field_txchanmap))
-		return PTR_ERR(i2s->field_txchanmap);
-
-	i2s->field_rxchanmap =
-			devm_regmap_field_alloc(dev, i2s->regmap,
-						i2s->variant->field_rxchanmap);
-	if (IS_ERR(i2s->field_rxchanmap))
-		return PTR_ERR(i2s->field_rxchanmap);
-
-	i2s->field_txchansel =
-			devm_regmap_field_alloc(dev, i2s->regmap,
-						i2s->variant->field_txchansel);
-	if (IS_ERR(i2s->field_txchansel))
-		return PTR_ERR(i2s->field_txchansel);
-
-	i2s->field_rxchansel =
-			devm_regmap_field_alloc(dev, i2s->regmap,
-						i2s->variant->field_rxchansel);
-	return PTR_ERR_OR_ZERO(i2s->field_rxchansel);
+	return 0;
 }
 
 static int sun4i_i2s_probe(struct platform_device *pdev)