On 10/14/20 1:19 AM, Samuel Holland wrote:
> AIF3 has some differences from AIF1 and AIF2:
> - It supports one channel only
> - It supports master mode only
> - It is not directly connected to any of the mixers; instead all audio
> goes through a mux with AIF2.
> - It does not have its own clock dividers; instead it reuses AIF2 BCLK
> and LRCK. This means that when both AIF2 and AIF3 are active, they
> must use the same sample rate and total frame width. Since AIF2 and
> AIF3 are only used for codec2codec DAI links, constraints are not
> applicable here; the only thing we can do when the rates don't match
> is report an error.
>
> Make the necessary adjustments to support this AIF.
>
> Signed-off-by: Samuel Holland <sam...@sholland.org>
> ---
> sound/soc/sunxi/sun8i-codec.c | 138 ++++++++++++++++++++++++++++++++--
> 1 file changed, 130 insertions(+), 8 deletions(-)
>
> diff --git a/sound/soc/sunxi/sun8i-codec.c b/sound/soc/sunxi/sun8i-codec.c
> index 6a8232e07983..180442c62be1 100644
> --- a/sound/soc/sunxi/sun8i-codec.c
> +++ b/sound/soc/sunxi/sun8i-codec.c
[snip]
> @@ -263,19 +273,30 @@ static int sun8i_codec_set_fmt(struct snd_soc_dai *dai,
> unsigned int fmt)
> break;
> case SND_SOC_DAIFMT_CBM_CFM: /* Codec Master, DAI slave */
> value = 0x0;
> break;
> default:
> return -EINVAL;
> }
>
> - regmap_update_bits(scodec->regmap, SUN8I_AIF_CLK_CTRL(dai->id),
> - BIT(SUN8I_AIF_CLK_CTRL_MSTR_MOD),
> - value << SUN8I_AIF_CLK_CTRL_MSTR_MOD);
> + if (dai->id == SUN8I_CODEC_AIF3) {
> + /* AIF3 only supports master mode. */
> + if (value)
> + return -EINVAL;
> +
> + /* Use the AIF2 BCLK and LRCK for AIF3. */
> + regmap_update_bits(scodec->regmap, SUN8I_AIF_CLK_CTRL(dai->id),
> + SUN8I_AIF3_CLK_CTRL_AIF3_CLK_SRC_MASK,
> + SUN8I_AIF3_CLK_CTRL_AIF3_CLK_SRC_AIF2);
Since the AIF3 clock source is set to AIF2 here...
> + } else {
> + regmap_update_bits(scodec->regmap, SUN8I_AIF_CLK_CTRL(dai->id),
> + BIT(SUN8I_AIF_CLK_CTRL_MSTR_MOD),
> + value << SUN8I_AIF_CLK_CTRL_MSTR_MOD);
> + }
>
> /* DAI format */
> switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
> case SND_SOC_DAIFMT_I2S:
> format = 0x0;
> break;
> case SND_SOC_DAIFMT_LEFT_J:
> format = 0x1;
[snip]
> @@ -908,16 +1016,22 @@ static const struct snd_soc_dapm_route
> sun8i_codec_dapm_routes[] = {
> { "CLK AIF2", NULL, "AIF2CLK" },
> { "CLK AIF2", NULL, "SYSCLK" },
> { "RST AIF2", NULL, "CLK AIF2" },
> { "AIF2 ADCL", NULL, "RST AIF2" },
> { "AIF2 ADCR", NULL, "RST AIF2" },
> { "AIF2 DACL", NULL, "RST AIF2" },
> { "AIF2 DACR", NULL, "RST AIF2" },
>
> + { "CLK AIF3", NULL, "AIF1CLK" },
^^^^^^^
...this should be "AIF2CLK". I will fix it in the next version.
> + { "CLK AIF3", NULL, "SYSCLK" },
> + { "RST AIF3", NULL, "CLK AIF3" },
> + { "AIF3 ADC", NULL, "RST AIF3" },
> + { "AIF3 DAC", NULL, "RST AIF3" },
> +
> { "CLK ADC", NULL, "SYSCLK" },
> { "RST ADC", NULL, "CLK ADC" },
> { "ADC", NULL, "RST ADC" },
> { "ADCL", NULL, "ADC" },
> { "ADCR", NULL, "ADC" },
>
> { "CLK DAC", NULL, "SYSCLK" },
> { "RST DAC", NULL, "CLK DAC" },
