The patch
ASoC: tlv320aic31xx: Handle inverted BCLK in non-DSP modes
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
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.
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Thanks, Mark
From dcb407b257af06fa58b0544ec01ec9e0d3927e02 Mon Sep 17 00:00:00 2001
From: "Andrew F. Davis" afd@ti.com Date: Wed, 29 Nov 2017 15:32:54 -0600 Subject: [PATCH] ASoC: tlv320aic31xx: Handle inverted BCLK in non-DSP modes
Currently BCLK inverting is only handled when the DAI format is DSP, but the BCLK may be inverted in any supported mode. Without this using this CODEC in any other mode than DSP with the BCLK inverted leads to bad sampling timing and very poor audio quality.
Signed-off-by: Andrew F. Davis afd@ti.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/codecs/tlv320aic31xx.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-)
diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c index d77cc36d7360..38fd6ea275fb 100644 --- a/sound/soc/codecs/tlv320aic31xx.c +++ b/sound/soc/codecs/tlv320aic31xx.c @@ -938,6 +938,18 @@ static int aic31xx_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_NF: + break; + case SND_SOC_DAIFMT_IB_NF: + iface_reg2 |= AIC31XX_BCLKINV_MASK; + break; + default: + dev_err(codec->dev, "Invalid DAI clock signal polarity\n"); + return -EINVAL; + } + /* interface format */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: @@ -945,16 +957,12 @@ static int aic31xx_set_dai_fmt(struct snd_soc_dai *codec_dai, case SND_SOC_DAIFMT_DSP_A: dsp_a_val = 0x1; /* fall through */ case SND_SOC_DAIFMT_DSP_B: - /* NOTE: BCLKINV bit value 1 equas NB and 0 equals IB */ - switch (fmt & SND_SOC_DAIFMT_INV_MASK) { - case SND_SOC_DAIFMT_NB_NF: - iface_reg2 |= AIC31XX_BCLKINV_MASK; - break; - case SND_SOC_DAIFMT_IB_NF: - break; - default: - return -EINVAL; - } + /* + * NOTE: This CODEC samples on the falling edge of BCLK in + * DSP mode, this is inverted compared to what most DAIs + * expect, so we invert for this mode + */ + iface_reg2 ^= AIC31XX_BCLKINV_MASK; iface_reg1 |= (AIC31XX_DSP_MODE << AIC31XX_IFACE1_DATATYPE_SHIFT); break;