[PATCH 3/3] ASoC: sun4i-i2s: Add regmap field to sign extend sample
From: codekipper at gmail.com <hidden>
Date: 2018-01-24 14:11:17
Also in:
alsa-devel, lkml
Subsystem:
sound, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Jaroslav Kysela, Takashi Iwai, Liam Girdwood, Mark Brown, Linus Torvalds
From: Marcus Cooper <redacted> On the newer SoCs this is set by default to transfer a 0 after each sample in each slot. Add the regmap field to configure this and set it so that it pads the sample with 0s. Signed-off-by: Marcus Cooper <redacted> --- sound/soc/sunxi/sun4i-i2s.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 626679057d0f..9fda1240b717 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c@@ -139,6 +139,7 @@ * @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_fmt_sext: regmap field to set the sign extension. * @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.
@@ -164,6 +165,7 @@ 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_fmt_sext; struct reg_field field_txchanmap; struct reg_field field_rxchanmap; struct reg_field field_txchansel;
@@ -188,6 +190,7 @@ 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_fmt_sext; struct regmap_field *field_txchanmap; struct regmap_field *field_rxchanmap; struct regmap_field *field_txchansel;
@@ -358,6 +361,9 @@ static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai, SUN8I_I2S_FMT0_LRCK_PERIOD_MASK, SUN8I_I2S_FMT0_LRCK_PERIOD(word_size)); + /* Set sign extension to pad out LSB with 0 */ + regmap_field_write(i2s->field_fmt_sext, 0); + return 0; }
@@ -929,6 +935,7 @@ 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_fmt_sext = REG_FIELD(SUN4I_I2S_FMT1_REG, 8, 8), .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),
@@ -946,6 +953,7 @@ 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_fmt_sext = REG_FIELD(SUN4I_I2S_FMT1_REG, 8, 8), .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),
@@ -986,6 +994,7 @@ 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_fmt_sext = REG_FIELD(SUN4I_I2S_FMT1_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),
@@ -1031,6 +1040,12 @@ 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_fmt_sext = + devm_regmap_field_alloc(dev, i2s->regmap, + i2s->variant->field_fmt_sext); + if (IS_ERR(i2s->field_fmt_sext)) + return PTR_ERR(i2s->field_fmt_sext); + i2s->field_txchanmap = devm_regmap_field_alloc(dev, i2s->regmap, i2s->variant->field_txchanmap);
--
2.16.0