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ASoC: nau8810: automatic selecting BCLK in I2S master mode 

The driver will select correct BCLK automatically according to
BCLK and FS information in I2S master mode.

Signed-off-by: John Hsu <KCHSU0@nuvoton.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
John Hsu 2019-03-13 16:52:01 +08:00 committed by Mark Brown
parent 709a9b8a1f
commit 20b83421e8
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1 changed files with 18 additions and 0 deletions
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18
sound/soc/codecs/nau8810.c
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@ -667,6 +667,24 @@ static int nau8810_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_component *component = dai->component;
struct nau8810 *nau8810 = snd_soc_component_get_drvdata(component);
int val_len = 0, val_rate = 0, ret = 0;
unsigned int ctrl_val, bclk_fs, bclk_div;
/* Select BCLK configuration if the codec as master. */
regmap_read(nau8810->regmap, NAU8810_REG_CLOCK, &ctrl_val);
if (ctrl_val & NAU8810_CLKIO_MASTER) {
/* get the bclk and fs ratio */
bclk_fs = snd_soc_params_to_bclk(params) / params_rate(params);
if (bclk_fs <= 32)
bclk_div = NAU8810_BCLKDIV_8;
else if (bclk_fs <= 64)
bclk_div = NAU8810_BCLKDIV_4;
else if (bclk_fs <= 128)
bclk_div = NAU8810_BCLKDIV_2;
else
return -EINVAL;
regmap_update_bits(nau8810->regmap, NAU8810_REG_CLOCK,
NAU8810_BCLKSEL_MASK, bclk_div);
}
switch (params_width(params)) {
case 16: