diff options
| author | Dan Murphy <dmurphy@ti.com> | 2020-09-15 14:06:02 -0500 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-09-17 14:47:13 +0100 |
| commit | 244ac15de75ca62ed7a09c7291b67aeead9e12ac (patch) | |
| tree | 8b067a0daf5013c753b8599280aa14836fbf9350 /sound/soc/codecs | |
| parent | df16e2210454ca0b8a59caf364dd287fbb76a804 (diff) | |
ASoC: tlv320adcx140: Fix BCLK inversion for DSP modes
Fix the BCLK inversion for DSP modes
This is how it is defined by ASoC:
* BCLK:
* - "normal" polarity means signal is available at rising edge of BCLK
* - "inverted" polarity means signal is available at falling edge of BCLK
The adcx140 defines the BCLK edge based on coding type.
The PCM (DSP_A/B) should drive on rising and sample on falling edge, so
from ASoC pov, it is IB_NF. But from the codec pov if it is configured in
DSP mode, then the BCLK should not be inverted, defaults to the coding
standard.
For i2s, it is NB_NF from ASoC pov (drive on falling, sample on rising).
>From the codec's pov BCLK should not invert either, as this is the default
for the coding.
So, inversion must take the format into account:
IB_NF + DSP_A/B == the codec bclk inversion should be disabled
NB_NF + DSP_A/B == the codec bclk inversion should be enabled
NB_NF + I2S == the codec bclk inversion should be disabled
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200915190606.1744-2-dmurphy@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs')
| -rw-r--r-- | sound/soc/codecs/tlv320adcx140.c | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/sound/soc/codecs/tlv320adcx140.c b/sound/soc/codecs/tlv320adcx140.c index 5e14b9f8c84f..936261e6c6d8 100644 --- a/sound/soc/codecs/tlv320adcx140.c +++ b/sound/soc/codecs/tlv320adcx140.c @@ -673,7 +673,7 @@ static int adcx140_set_dai_fmt(struct snd_soc_dai *codec_dai, u8 iface_reg1 = 0; u8 iface_reg2 = 0; int offset = 0; - int width = adcx140->slot_width; + bool inverted_bclk = false; /* set master/slave audio interface */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { @@ -689,24 +689,6 @@ static int adcx140_set_dai_fmt(struct snd_soc_dai *codec_dai, return -EINVAL; } - /* signal polarity */ - switch (fmt & SND_SOC_DAIFMT_INV_MASK) { - case SND_SOC_DAIFMT_NB_IF: - iface_reg1 |= ADCX140_FSYNCINV_BIT; - break; - case SND_SOC_DAIFMT_IB_IF: - iface_reg1 |= ADCX140_BCLKINV_BIT | ADCX140_FSYNCINV_BIT; - break; - case SND_SOC_DAIFMT_IB_NF: - iface_reg1 |= ADCX140_BCLKINV_BIT; - break; - case SND_SOC_DAIFMT_NB_NF: - break; - default: - dev_err(component->dev, "Invalid DAI clock signal polarity\n"); - return -EINVAL; - } - /* interface format */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: @@ -716,16 +698,36 @@ static int adcx140_set_dai_fmt(struct snd_soc_dai *codec_dai, iface_reg1 |= ADCX140_LEFT_JUST_BIT; break; case SND_SOC_DAIFMT_DSP_A: - offset += (adcx140->tdm_delay * width + 1); + offset = 1; + inverted_bclk = true; break; case SND_SOC_DAIFMT_DSP_B: - offset += adcx140->tdm_delay * width; + inverted_bclk = true; break; default: dev_err(component->dev, "Invalid DAI interface format\n"); return -EINVAL; } + /* signal polarity */ + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_IB_NF: + case SND_SOC_DAIFMT_IB_IF: + inverted_bclk = !inverted_bclk; + break; + case SND_SOC_DAIFMT_NB_IF: + iface_reg1 |= ADCX140_FSYNCINV_BIT; + break; + case SND_SOC_DAIFMT_NB_NF: + break; + default: + dev_err(component->dev, "Invalid DAI clock signal polarity\n"); + return -EINVAL; + } + + if (inverted_bclk) + iface_reg1 |= ADCX140_BCLKINV_BIT; + adcx140->dai_fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK; adcx140_pwr_ctrl(adcx140, false); |