The patch

ASoC: max9867: Calculate LRCLK divider

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.

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

Thanks, Mark

From 715ee1916b95bfd0773487397a0354ad9a4660e6 Mon Sep 17 00:00:00 2001

From: Ladislav Michl ladis@linux-mips.org Date: Tue, 4 Dec 2018 19:21:04 +0100 Subject: [PATCH] ASoC: max9867: Calculate LRCLK divider

Drop "Common NI Values Table" and calculate LRCLK divider, then add allowed rate constraints based on master clock frequency.

Signed-off-by: Ladislav Michl ladis@linux-mips.org Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/codecs/max9867.c | 207 ++++++++++++++++++------------------- sound/soc/codecs/max9867.h | 31 ++---- 2 files changed, 110 insertions(+), 128 deletions(-)

diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c index c454de434d76..faec094161c1 100644 --- a/sound/soc/codecs/max9867.c +++ b/sound/soc/codecs/max9867.c @@ -126,124 +126,106 @@ static const struct snd_soc_dapm_route max9867_audio_map[] = { {"LINE_IN", NULL, "Right Line"}, };

-enum rates { - pcm_rate_8, pcm_rate_16, pcm_rate_24, - pcm_rate_32, pcm_rate_44, - pcm_rate_48, max_pcm_rate, +static const unsigned int max9867_rates_44k1[] = { + 11025, 22050, 44100, };

-static const struct ni_div_rates { - u32 mclk; - u16 ni[max_pcm_rate]; -} ni_div[] = { - {11289600, {0x116A, 0x22D4, 0x343F, 0x45A9, 0x6000, 0x687D} }, - {12000000, {0x1062, 0x20C5, 0x3127, 0x4189, 0x5A51, 0x624E} }, - {12288000, {0x1000, 0x2000, 0x3000, 0x4000, 0x5833, 0x6000} }, - {13000000, {0x0F20, 0x1E3F, 0x2D5F, 0x3C7F, 0x535F, 0x5ABE} }, - {19200000, {0x0A3D, 0x147B, 0x1EB8, 0x28F6, 0x3873, 0x3D71} }, - {24000000, {0x1062, 0x20C5, 0x1893, 0x4189, 0x5A51, 0x624E} }, - {26000000, {0x0F20, 0x1E3F, 0x16AF, 0x3C7F, 0x535F, 0x5ABE} }, - {27000000, {0x0E90, 0x1D21, 0x15D8, 0x3A41, 0x5048, 0x5762} }, +static const struct snd_pcm_hw_constraint_list max9867_constraints_44k1 = { + .list = max9867_rates_44k1, + .count = ARRAY_SIZE(max9867_rates_44k1), };

-static inline int get_ni_value(int mclk, int rate) +static const unsigned int max9867_rates_48k[] = { + 8000, 16000, 32000, 48000, +}; + +static const struct snd_pcm_hw_constraint_list max9867_constraints_48k = { + .list = max9867_rates_48k, + .count = ARRAY_SIZE(max9867_rates_48k), +}; + +struct max9867_priv { + struct regmap *regmap; + const struct snd_pcm_hw_constraint_list *constraints; + unsigned int sysclk, pclk; + bool master, dsp_a; +}; + +static int max9867_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) { - int i, ret = 0; + struct max9867_priv *max9867 = + snd_soc_component_get_drvdata(dai->component);

- /* find the closest rate index*/ - for (i = 0; i < ARRAY_SIZE(ni_div); i++) { - if (ni_div[i].mclk >= mclk) - break; - } - if (i == ARRAY_SIZE(ni_div)) - return -EINVAL; + if (max9867->constraints) + snd_pcm_hw_constraint_list(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_RATE, max9867->constraints);

- switch (rate) { - case 8000: - return ni_div[i].ni[pcm_rate_8]; - case 16000: - return ni_div[i].ni[pcm_rate_16]; - case 32000: - return ni_div[i].ni[pcm_rate_32]; - case 44100: - return ni_div[i].ni[pcm_rate_44]; - case 48000: - return ni_div[i].ni[pcm_rate_48]; - default: - pr_err("%s wrong rate %d\n", __func__, rate); - ret = -EINVAL; - } - return ret; + return 0; }

static int max9867_dai_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { + int value; + unsigned long int rate, ratio; struct snd_soc_component *component = dai->component; struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); - unsigned int ni_h, ni_l; - int value; + unsigned int ni = DIV_ROUND_CLOSEST_ULL(96ULL * 0x10000 * params_rate(params), + max9867->pclk);

- value = get_ni_value(max9867->sysclk, params_rate(params)); - if (value < 0) - return value; - - ni_h = (0xFF00 & value) >> 8; - ni_l = 0x00FF & value; /* set up the ni value */ regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH, - MAX9867_NI_HIGH_MASK, ni_h); + MAX9867_NI_HIGH_MASK, (0xFF00 & ni) >> 8); regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW, - MAX9867_NI_LOW_MASK, ni_l); - if (!max9867->master) { - /* - * digital pll locks on to any externally supplied LRCLK signal - * and also enable rapid lock mode. - */ - regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW, - MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK); - regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH, - MAX9867_PLL, MAX9867_PLL); - } else { - unsigned long int bclk_rate, pclk_bclk_ratio; - int bclk_value; - - bclk_rate = params_rate(params) * 2 * params_width(params); - pclk_bclk_ratio = max9867->pclk/bclk_rate; - switch (params_width(params)) { - case 8: - case 16: - switch (pclk_bclk_ratio) { - case 2: - bclk_value = MAX9867_IFC1B_PCLK_2; - break; - case 4: - bclk_value = MAX9867_IFC1B_PCLK_4; - break; + MAX9867_NI_LOW_MASK, 0x00FF & ni); + if (max9867->master) { + if (max9867->dsp_a) { + value = MAX9867_IFC1B_48X; + } else { + rate = params_rate(params) * 2 * params_width(params); + ratio = max9867->pclk / rate; + switch (params_width(params)) { case 8: - bclk_value = MAX9867_IFC1B_PCLK_8; - break; case 16: - bclk_value = MAX9867_IFC1B_PCLK_16; + switch (ratio) { + case 2: + value = MAX9867_IFC1B_PCLK_2; + break; + case 4: + value = MAX9867_IFC1B_PCLK_4; + break; + case 8: + value = MAX9867_IFC1B_PCLK_8; + break; + case 16: + value = MAX9867_IFC1B_PCLK_16; + break; + default: + return -EINVAL; + } + break; + case 24: + value = MAX9867_IFC1B_48X; + break; + case 32: + value = MAX9867_IFC1B_64X; break; default: - dev_err(component->dev, - "unsupported sampling rate\n"); return -EINVAL; } - break; - case 24: - bclk_value = MAX9867_IFC1B_24BIT; - break; - case 32: - bclk_value = MAX9867_IFC1B_32BIT; - break; - default: - dev_err(component->dev, "unsupported sampling rate\n"); - return -EINVAL; } regmap_update_bits(max9867->regmap, MAX9867_IFC1B, - MAX9867_IFC1B_BCLK_MASK, bclk_value); + MAX9867_IFC1B_BCLK_MASK, value); + } else { + /* + * digital pll locks on to any externally supplied LRCLK signal + * and also enable rapid lock mode. + */ + regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW, + MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK); + regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH, + MAX9867_PLL, MAX9867_PLL); } return 0; } @@ -285,8 +267,16 @@ static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai, freq); return -EINVAL; } - value = value << MAX9867_PSCLK_SHIFT; + if (freq % 48000 == 0) + max9867->constraints = &max9867_constraints_48k; + else if (freq % 44100 == 0) + max9867->constraints = &max9867_constraints_44k1; + else + dev_warn(component->dev, + "Unable to set exact rate with %uHz clock frequency\n", + freq); max9867->sysclk = freq; + value = value << MAX9867_PSCLK_SHIFT; /* exact integer mode is not supported */ value &= ~MAX9867_FREQ_MASK; regmap_update_bits(max9867->regmap, MAX9867_SYSCLK, @@ -299,16 +289,17 @@ static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai, { struct snd_soc_component *component = codec_dai->component; struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); - u8 iface1A = 0, iface1B = 0; + u8 iface1A, iface1B;

switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: - max9867->master = 1; - iface1A |= MAX9867_MASTER; + max9867->master = true; + iface1A = MAX9867_MASTER; + iface1B = MAX9867_IFC1B_48X; break; case SND_SOC_DAIFMT_CBS_CFS: - max9867->master = 0; - iface1A &= ~MAX9867_MASTER; + max9867->master = false; + iface1A = iface1B = 0; break; default: return -EINVAL; @@ -316,9 +307,11 @@ static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,

switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: + max9867->dsp_a = false; iface1A |= MAX9867_I2S_DLY; break; case SND_SOC_DAIFMT_DSP_A: + max9867->dsp_a = true; iface1A |= MAX9867_TDM_MODE | MAX9867_SDOUT_HIZ; break; default: @@ -344,20 +337,18 @@ static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,

regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A); regmap_write(max9867->regmap, MAX9867_IFC1B, iface1B); + return 0; }

static const struct snd_soc_dai_ops max9867_dai_ops = { - .set_fmt = max9867_dai_set_fmt, .set_sysclk = max9867_set_dai_sysclk, + .set_fmt = max9867_dai_set_fmt, .digital_mute = max9867_mute, - .hw_params = max9867_dai_hw_params, + .startup = max9867_startup, + .hw_params = max9867_dai_hw_params, };

-#define MAX9867_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\ - SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000) -#define MAX9867_FORMATS (SNDRV_PCM_FMTBIT_S16_LE) - static struct snd_soc_dai_driver max9867_dai[] = { { .name = "max9867-aif1", @@ -365,15 +356,15 @@ static struct snd_soc_dai_driver max9867_dai[] = { .stream_name = "HiFi Playback", .channels_min = 2, .channels_max = 2, - .rates = MAX9867_RATES, - .formats = MAX9867_FORMATS, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, }, .capture = { .stream_name = "HiFi Capture", .channels_min = 2, .channels_max = 2, - .rates = MAX9867_RATES, - .formats = MAX9867_FORMATS, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, }, .ops = &max9867_dai_ops, .symmetric_rates = 1, diff --git a/sound/soc/codecs/max9867.h b/sound/soc/codecs/max9867.h index d9170850c96e..7f037ab701a5 100644 --- a/sound/soc/codecs/max9867.h +++ b/sound/soc/codecs/max9867.h @@ -26,13 +26,11 @@ #define MAX9867_PSCLK_10_20 0x1 #define MAX9867_PSCLK_20_40 0x2 #define MAX9867_PSCLK_40_60 0x3 -#define MAX9867_AUDIOCLKHIGH 0x06 -#define MAX9867_NI_HIGH_WIDTH 0x7 -#define MAX9867_NI_HIGH_MASK 0x7F -#define MAX9867_NI_LOW_MASK 0x7F -#define MAX9867_NI_LOW_SHIFT 0x1 -#define MAX9867_PLL (1<<7) -#define MAX9867_AUDIOCLKLOW 0x07 +#define MAX9867_AUDIOCLKHIGH 0x06 +#define MAX9867_NI_HIGH_MASK 0x7F +#define MAX9867_NI_LOW_MASK 0xFE +#define MAX9867_PLL (1<<7) +#define MAX9867_AUDIOCLKLOW 0x07 #define MAX9867_RAPID_LOCK 0x01 #define MAX9867_IFC1A 0x08 #define MAX9867_MASTER (1<<7) @@ -43,12 +41,12 @@ #define MAX9867_BCI_MODE (1<<5) #define MAX9867_IFC1B 0x09 #define MAX9867_IFC1B_BCLK_MASK 7 -#define MAX9867_IFC1B_32BIT 0x01 -#define MAX9867_IFC1B_24BIT 0x02 -#define MAX9867_IFC1B_PCLK_2 4 -#define MAX9867_IFC1B_PCLK_4 5 -#define MAX9867_IFC1B_PCLK_8 6 -#define MAX9867_IFC1B_PCLK_16 7 +#define MAX9867_IFC1B_64X 0x01 +#define MAX9867_IFC1B_48X 0x02 +#define MAX9867_IFC1B_PCLK_2 0x04 +#define MAX9867_IFC1B_PCLK_4 0x05 +#define MAX9867_IFC1B_PCLK_8 0x06 +#define MAX9867_IFC1B_PCLK_16 0x07 #define MAX9867_CODECFLTR 0x0a #define MAX9867_DACGAIN 0x0b #define MAX9867_DACLEVEL 0x0c @@ -72,11 +70,4 @@

#define MAX9867_CACHEREGNUM 10

-/* codec private data */ -struct max9867_priv { - struct regmap *regmap; - unsigned int sysclk; - unsigned int pclk; - unsigned int master; -}; #endif