ASoC: cs42l42: Correct definition of ADC Volume control

The ADC volume is a signed 8-bit number with range -97 to +12, with -97 being mute. Use a SOC_SINGLE_S8_TLV() to define this and fix the DECLARE_TLV_DB_SCALE() to have the correct start and mute flag.

---
 sound/soc/codecs/cs42l42.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

index eff013f295be..2fd20511f246 100644
@@ -405,7 +405,7 @@ static const struct regmap_config cs42l42_regmap = {
 	.use_single_write = true,
 };
 
-static DECLARE_TLV_DB_SCALE(adc_tlv, -9600, 100, false);
+static DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 100, true);
 static DECLARE_TLV_DB_SCALE(mixer_tlv, -6300, 100, true);
 
 static const char * const cs42l42_hpf_freq_text[] = {

@@ -444,8 +444,7 @@ static const struct snd_kcontrol_new cs42l42_snd_controls[] = {
 				CS42L42_ADC_INV_SHIFT, true, false),
 	SOC_SINGLE("ADC Boost Switch", CS42L42_ADC_CTL,
 				CS42L42_ADC_DIG_BOOST_SHIFT, true, false),
-	SOC_SINGLE_SX_TLV("ADC Volume", CS42L42_ADC_VOLUME,
-				CS42L42_ADC_VOL_SHIFT, 0xA0, 0x6C, adc_tlv),
+	SOC_SINGLE_S8_TLV("ADC Volume", CS42L42_ADC_VOLUME, -97, 12, adc_tlv),
 	SOC_SINGLE("ADC WNF Switch", CS42L42_ADC_WNF_HPF_CTL,
 				CS42L42_ADC_WNF_EN_SHIFT, true, false),
 	SOC_SINGLE("ADC HPF Switch", CS42L42_ADC_WNF_HPF_CTL,

2.11.0

The driver has no support for left-justified protocol so it should not have been allowing this to be passed to cs42l42_set_dai_fmt().

---
 sound/soc/codecs/cs42l42.c | 1 -
 1 file changed, 1 deletion(-)

index 2fd20511f246..38e243a815b1 100644
@@ -788,7 +788,6 @@ static int cs42l42_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
 	/* interface format */
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
-	case SND_SOC_DAIFMT_LEFT_J:
 		break;
 	default:
 		return -EINVAL;

2.11.0

An I2S frame always has a left and right channel slot even if mono data is being sent. So if channels==1 the actual bitclock frequency is 2 * snd_soc_params_to_bclk(params).

---
 sound/soc/codecs/cs42l42.c | 4 ++++
 1 file changed, 4 insertions(+)

index 38e243a815b1..08ca05bfbeb3 100644
@@ -830,6 +830,10 @@ static int cs42l42_pcm_hw_params(struct snd_pcm_substream *substream,
 	cs42l42->srate = params_rate(params);
 	cs42l42->bclk = snd_soc_params_to_bclk(params);
 
+	/* I2S frame always has 2 channels even for mono audio */
+	if (channels == 1)
+		cs42l42->bclk *= 2;
+
 	switch(substream->stream) {
 	case SNDRV_PCM_STREAM_CAPTURE:
 		if (channels == 2) {

2.11.0

Applied to

torvalds/linux.git master

Thanks!

[1/3] ASoC: cs42l42: Correct definition of ADC Volume control

      commit: ee86f680ff4c9b406d49d4e22ddf10805b8a2137
[2/3] ASoC: cs42l42: Don't allow SND_SOC_DAIFMT_LEFT_J
      commit: 64324bac750b84ca54711fb7d332132fcdb87293
[3/3] ASoC: cs42l42: Fix bclk calculation for mono
      commit: 926ef1a4c245c093acc07807e466ad2ef0ff6ccb

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying to this mail.

Thanks,
Mark

Ugh, sorry - the script is confused. This is applied to the ASoC tree.