In TDM mode, the BSEL register value must be set according to table 5 in the datasheet. This patch adds a lookup function and uses it in max98396_dai_tdm_slot().

As the first 3 entries can also be used for non-TDM setups, the code re-uses the same table for such scenarios.

Signed-off-by: Daniel Mack daniel@zonque.org --- sound/soc/codecs/max98396.c | 138 +++++++++++++++++++++++++----------- sound/soc/codecs/max98396.h | 2 +- 2 files changed, 96 insertions(+), 44 deletions(-)

diff --git a/sound/soc/codecs/max98396.c b/sound/soc/codecs/max98396.c index f28831f4e74b..1b6f053adba2 100644 --- a/sound/soc/codecs/max98396.c +++ b/sound/soc/codecs/max98396.c @@ -438,47 +438,68 @@ static int max98396_dai_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) return 0; }

-/* BCLKs per LRCLK */ -static const int bclk_sel_table[] = { - 32, 48, 64, 96, 128, 192, 256, 384, 512, 320, +#define MAX98396_BSEL_32 0x2 +#define MAX98396_BSEL_48 0x3 +#define MAX98396_BSEL_64 0x4 +#define MAX98396_BSEL_96 0x5 +#define MAX98396_BSEL_128 0x6 +#define MAX98396_BSEL_192 0x7 +#define MAX98396_BSEL_256 0x8 +#define MAX98396_BSEL_384 0x9 +#define MAX98396_BSEL_512 0xa +#define MAX98396_BSEL_320 0xb +#define MAX98396_BSEL_250 0xc +#define MAX98396_BSEL_125 0xd + +/* Refer to table 5 in the datasheet */ +static const struct max98396_pcm_config { + int in, out, width, bsel, max_sr; +} max98396_pcm_configs[] = { + { .in = 2, .out = 4, .width = 16, .bsel = MAX98396_BSEL_32, .max_sr = 192000 }, + { .in = 2, .out = 6, .width = 24, .bsel = MAX98396_BSEL_48, .max_sr = 192000 }, + { .in = 2, .out = 8, .width = 32, .bsel = MAX98396_BSEL_64, .max_sr = 192000 }, + { .in = 3, .out = 15, .width = 32, .bsel = MAX98396_BSEL_125, .max_sr = 192000 }, + { .in = 4, .out = 8, .width = 16, .bsel = MAX98396_BSEL_64, .max_sr = 192000 }, + { .in = 4, .out = 12, .width = 24, .bsel = MAX98396_BSEL_96, .max_sr = 192000 }, + { .in = 4, .out = 16, .width = 32, .bsel = MAX98396_BSEL_128, .max_sr = 192000 }, + { .in = 5, .out = 15, .width = 24, .bsel = MAX98396_BSEL_125, .max_sr = 192000 }, + { .in = 7, .out = 15, .width = 16, .bsel = MAX98396_BSEL_125, .max_sr = 192000 }, + { .in = 2, .out = 4, .width = 16, .bsel = MAX98396_BSEL_32, .max_sr = 96000 }, + { .in = 2, .out = 6, .width = 24, .bsel = MAX98396_BSEL_48, .max_sr = 96000 }, + { .in = 2, .out = 8, .width = 32, .bsel = MAX98396_BSEL_64, .max_sr = 96000 }, + { .in = 3, .out = 15, .width = 32, .bsel = MAX98396_BSEL_125, .max_sr = 96000 }, + { .in = 4, .out = 8, .width = 16, .bsel = MAX98396_BSEL_64, .max_sr = 96000 }, + { .in = 4, .out = 12, .width = 24, .bsel = MAX98396_BSEL_96, .max_sr = 96000 }, + { .in = 4, .out = 16, .width = 32, .bsel = MAX98396_BSEL_128, .max_sr = 96000 }, + { .in = 5, .out = 15, .width = 24, .bsel = MAX98396_BSEL_125, .max_sr = 96000 }, + { .in = 7, .out = 15, .width = 16, .bsel = MAX98396_BSEL_125, .max_sr = 96000 }, + { .in = 7, .out = 31, .width = 32, .bsel = MAX98396_BSEL_250, .max_sr = 96000 }, + { .in = 8, .out = 16, .width = 16, .bsel = MAX98396_BSEL_128, .max_sr = 96000 }, + { .in = 8, .out = 24, .width = 24, .bsel = MAX98396_BSEL_192, .max_sr = 96000 }, + { .in = 8, .out = 32, .width = 32, .bsel = MAX98396_BSEL_256, .max_sr = 96000 }, + { .in = 10, .out = 31, .width = 24, .bsel = MAX98396_BSEL_250, .max_sr = 96000 }, + { .in = 15, .out = 31, .width = 16, .bsel = MAX98396_BSEL_250, .max_sr = 96000 }, + { .in = 16, .out = 32, .width = 16, .bsel = MAX98396_BSEL_256, .max_sr = 96000 }, + { .in = 7, .out = 31, .width = 32, .bsel = MAX98396_BSEL_250, .max_sr = 48000 }, + { .in = 10, .out = 31, .width = 24, .bsel = MAX98396_BSEL_250, .max_sr = 48000 }, + { .in = 10, .out = 40, .width = 32, .bsel = MAX98396_BSEL_320, .max_sr = 48000 }, + { .in = 15, .out = 31, .width = 16, .bsel = MAX98396_BSEL_250, .max_sr = 48000 }, + { .in = 16, .out = 48, .width = 24, .bsel = MAX98396_BSEL_384, .max_sr = 48000 }, + { .in = 16, .out = 64, .width = 32, .bsel = MAX98396_BSEL_512, .max_sr = 48000 }, };

-static int max98396_get_bclk_sel(int bclk) +static int max98396_pcm_config_index(int in_slots, int out_slots, int width) { int i; - /* match BCLKs per LRCLK */ - for (i = 0; i < ARRAY_SIZE(bclk_sel_table); i++) { - if (bclk_sel_table[i] == bclk) - return i + 2; - } - return 0; -} - -static int max98396_set_clock(struct snd_soc_component *component, - struct snd_pcm_hw_params *params) -{ - struct max98396_priv *max98396 = snd_soc_component_get_drvdata(component); - /* BCLK/LRCLK ratio calculation */ - int blr_clk_ratio = params_channels(params) * max98396->ch_size; - int value;

- if (!max98396->tdm_mode) { - /* BCLK configuration */ - value = max98396_get_bclk_sel(blr_clk_ratio); - if (!value) { - dev_err(component->dev, - "blr_clk_ratio %d unsupported, format %d\n", - blr_clk_ratio, params_format(params)); - return -EINVAL; - } + for (i = 0; i < ARRAY_SIZE(max98396_pcm_configs); i++) { + const struct max98396_pcm_config *c = &max98396_pcm_configs[i];

- regmap_update_bits(max98396->regmap, - MAX98396_R2042_PCM_CLK_SETUP, - MAX98396_PCM_CLK_SETUP_BSEL_MASK, - value); + if (in_slots == c->in && out_slots <= c->out && width == c->width) + return i; }

- return 0; + return -1; }

static int max98396_dai_hw_params(struct snd_pcm_substream *substream, @@ -489,8 +510,7 @@ static int max98396_dai_hw_params(struct snd_pcm_substream *substream, struct max98396_priv *max98396 = snd_soc_component_get_drvdata(component); unsigned int sampling_rate = 0; unsigned int chan_sz = 0; - int ret, reg; - int status; + int ret, reg, status, bsel = 0; bool update = false;

/* pcm mode configuration */ @@ -510,8 +530,6 @@ static int max98396_dai_hw_params(struct snd_pcm_substream *substream, goto err; }

- max98396->ch_size = snd_pcm_format_width(params_format(params)); - dev_dbg(component->dev, "format supported %d", params_format(params));

@@ -559,6 +577,33 @@ static int max98396_dai_hw_params(struct snd_pcm_substream *substream, goto err; }

+ if (max98396->tdm_mode) { + if (params_rate(params) > max98396->tdm_max_samplerate) { + dev_err(component->dev, "TDM sample rate %d too high", + params_rate(params)); + goto err; + } + } else { + /* BCLK configuration */ + ret = max98396_pcm_config_index(params_channels(params), + params_channels(params), + snd_pcm_format_width(params_format(params))); + if (ret < 0) { + dev_err(component->dev, + "no PCM config for %d channels, format %d\n", + params_channels(params), params_format(params)); + goto err; + } + + bsel = max98396_pcm_configs[ret].bsel; + + if (params_rate(params) > max98396_pcm_configs[ret].max_sr) { + dev_err(component->dev, "sample rate %d too high", + params_rate(params)); + goto err; + } + } + ret = regmap_read(max98396->regmap, MAX98396_R210F_GLOBAL_EN, &status); if (ret < 0) goto err; @@ -604,12 +649,16 @@ static int max98396_dai_hw_params(struct snd_pcm_substream *substream, MAX98396_IVADC_SR_MASK, sampling_rate << MAX98396_IVADC_SR_SHIFT);

- ret = max98396_set_clock(component, params); + if (bsel) + regmap_update_bits(max98396->regmap, + MAX98396_R2042_PCM_CLK_SETUP, + MAX98396_PCM_CLK_SETUP_BSEL_MASK, + bsel);

if (status && update) max98396_global_enable_onoff(max98396->regmap, true);

- return ret; + return 0;

err: return -EINVAL; @@ -634,13 +683,16 @@ static int max98396_dai_tdm_slot(struct snd_soc_dai *dai, max98396->tdm_mode = true;

/* BCLK configuration */ - bsel = max98396_get_bclk_sel(slots * slot_width); - if (bsel == 0) { - dev_err(component->dev, "BCLK %d not supported\n", - slots * slot_width); + ret = max98396_pcm_config_index(slots, slots, slot_width); + if (ret < 0) { + dev_err(component->dev, "no TDM config for %d slots %d bits\n", + slots, slot_width); return -EINVAL; }

+ bsel = max98396_pcm_configs[ret].bsel; + max98396->tdm_max_samplerate = max98396_pcm_configs[ret].max_sr; + /* Channel size configuration */ switch (slot_width) { case 16: diff --git a/sound/soc/codecs/max98396.h b/sound/soc/codecs/max98396.h index ff330ef61568..7278c779989a 100644 --- a/sound/soc/codecs/max98396.h +++ b/sound/soc/codecs/max98396.h @@ -306,8 +306,8 @@ struct max98396_priv { unsigned int spkfb_slot; unsigned int bypass_slot; bool interleave_mode; - unsigned int ch_size; bool tdm_mode; + int tdm_max_samplerate; int device_id; }; #endif