On 10/5/20 6:30 AM, Maxime Ripard wrote:
On Wed, Sep 30, 2020 at 09:11:34PM -0500, Samuel Holland wrote:
When using the I2S, LEFT_J, or RIGHT_J format, the hardware supports independent BCLK and LRCK inversion control. When using DSP_A or DSP_B, LRCK inversion is not supported. The register bit is repurposed to select between DSP_A and DSP_B. Extend the driver to support this.
Signed-off-by: Samuel Holland samuel@sholland.org
sound/soc/sunxi/sun8i-codec.c | 57 +++++++++++++++++++++++------------ 1 file changed, 37 insertions(+), 20 deletions(-)
diff --git a/sound/soc/sunxi/sun8i-codec.c b/sound/soc/sunxi/sun8i-codec.c index 0b713b2a2028..506420fb355c 100644 --- a/sound/soc/sunxi/sun8i-codec.c +++ b/sound/soc/sunxi/sun8i-codec.c @@ -39,18 +39,17 @@ #define SUN8I_MOD_RST_CTL_AIF1 15 #define SUN8I_MOD_RST_CTL_ADC 3 #define SUN8I_MOD_RST_CTL_DAC 2 #define SUN8I_SYS_SR_CTRL 0x018 #define SUN8I_SYS_SR_CTRL_AIF1_FS 12 #define SUN8I_SYS_SR_CTRL_AIF2_FS 8 #define SUN8I_AIF1CLK_CTRL 0x040 #define SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD 15 -#define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV 14 -#define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV 13 +#define SUN8I_AIF1CLK_CTRL_AIF1_CLK_INV 13 #define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV 9 #define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV 6 #define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ 4 #define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_16 (1 << 4) #define SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT 2 #define SUN8I_AIF1_ADCDAT_CTRL 0x044 #define SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0L_ENA 15 #define SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0R_ENA 14 @@ -85,16 +84,17 @@ #define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA1R 10 #define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF2DACR 9 #define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_ADCR 8
#define SUN8I_SYSCLK_CTL_AIF1CLK_SRC_MASK GENMASK(9, 8) #define SUN8I_SYSCLK_CTL_AIF2CLK_SRC_MASK GENMASK(5, 4) #define SUN8I_SYS_SR_CTRL_AIF1_FS_MASK GENMASK(15, 12) #define SUN8I_SYS_SR_CTRL_AIF2_FS_MASK GENMASK(11, 8) +#define SUN8I_AIF1CLK_CTRL_AIF1_CLK_INV_MASK GENMASK(14, 13) #define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV_MASK GENMASK(12, 9) #define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_MASK GENMASK(8, 6) #define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_MASK GENMASK(5, 4) #define SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT_MASK GENMASK(3, 2)
enum { AIF1, NAIFS @@ -168,17 +168,17 @@ static int sun8i_codec_get_hw_rate(struct snd_pcm_hw_params *params) default: return -EINVAL; } }
static int sun8i_codec_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct sun8i_codec *scodec = snd_soc_dai_get_drvdata(dai);
- u32 format, value;
u32 format, invert, value;
/* clock masters */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: /* Codec slave, DAI master */ value = 0x1; break; case SND_SOC_DAIFMT_CBM_CFM: /* Codec Master, DAI slave */ value = 0x0;
@@ -197,55 +197,72 @@ static int sun8i_codec_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) break; case SND_SOC_DAIFMT_LEFT_J: format = 0x1; break; case SND_SOC_DAIFMT_RIGHT_J: format = 0x2; break; case SND_SOC_DAIFMT_DSP_A:
format = 0x3;invert = 0x0; /* Set LRCK_INV to 0 */break;case SND_SOC_DAIFMT_DSP_B: format = 0x3;
invert = 0x1; /* Set LRCK_INV to 1 */break; default: return -EINVAL; } regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL, SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT_MASK, format << SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT);
/* clock inversion */ switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: /* Normal */ value = 0x0; break;
- case SND_SOC_DAIFMT_IB_IF: /* Inversion */
- case SND_SOC_DAIFMT_NB_IF: /* Inverted LRCK */ value = 0x1; break;
- case SND_SOC_DAIFMT_IB_NF: /* Inverted BCLK */
value = 0x2;break;- case SND_SOC_DAIFMT_IB_IF: /* Both inverted */
value = 0x3;break;
regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
BIT(SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV),value << SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV);/*
* It appears that the DAI and the codec in the A33 SoC don't* share the same polarity for the LRCK signal when they mean* 'normal' and 'inverted' in the datasheet.** Since the DAI here is our regular i2s driver that have been* tested with way more codecs than just this one, it means* that the codec probably gets it backward, and we have to* invert the value here.*/value ^= scodec->quirks->lrck_inversion;
- if (format == 0x3) {
Could we use a define here? That would be more readable
Yes, I can do that.
/* Inverted LRCK is not available in DSP mode. */if (value & BIT(0))return -EINVAL;And same thing here, explicitly testing both for DSP_A and DSP_B would be more readable.
Here, `value & BIT(0)` means SND_SOC_DAIFMT_NB_IF || SND_SOC_DAIFMT_IB_IF, not selecting the DSP format.
(And I guess value isn't such a great variable name anymore either)
If I rename `invert` to `dsp_format`, and replace `value` here with `invert`, I think that would be more clear.
Maxime
Cheers, Samuel