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ASoC: cs42xx8: Fix MFREQ selection issue for async mode

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When sample rate of TX is different with sample rate of RX in
async mode, the MFreq selection will be wrong.

For example, sysclk = 24.576MHz, TX rate = 96000Hz, RX rate = 48000Hz.
Then ratio of TX = 256, ratio of RX = 512, For MFreq is shared by TX
and RX instance, the correct value of MFreq is 2 for both TX and RX.

But original method will cause MFreq = 0 for TX, MFreq = 2 for RX.
If TX is started after RX, RX will be impacted, RX work abnormal with
MFreq = 0.

This patch is to select proper MFreq value according to TX rate and
RX rate.

Fixes: 0c516b4ff8 ("ASoC: cs42xx8: Add codec driver support for CS42448/CS42888")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/20190716094547.46787-1-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Shengjiu Wang 2019-07-16 17:45:47 +08:00 committed by Mark Brown
parent 8dd26dff00
commit 48dfd37a0f
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 97 additions and 19 deletions
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116
sound/soc/codecs/cs42xx8.c
View File

@ -47,6 +47,7 @@ struct cs42xx8_priv {
unsigned long sysclk;
u32 tx_channels;
struct gpio_desc *gpiod_reset;
u32 rate[2];
};
/* -127.5dB to 0dB with step of 0.5dB */
@ -176,21 +177,27 @@ static const struct snd_soc_dapm_route cs42xx8_adc3_dapm_routes[] = {
};
struct cs42xx8_ratios {
unsigned int ratio;
unsigned char speed;
unsigned char mclk;
unsigned int mfreq;
unsigned int min_mclk;
unsigned int max_mclk;
unsigned int ratio[3];
};
/*
* According to reference mannual, define the cs42xx8_ratio struct
* MFreq2 | MFreq1 | MFreq0 | Description | SSM | DSM | QSM |
* 0 | 0 | 0 |1.029MHz to 12.8MHz | 256 | 128 | 64 |
* 0 | 0 | 1 |1.536MHz to 19.2MHz | 384 | 192 | 96 |
* 0 | 1 | 0 |2.048MHz to 25.6MHz | 512 | 256 | 128 |
* 0 | 1 | 1 |3.072MHz to 38.4MHz | 768 | 384 | 192 |
* 1 | x | x |4.096MHz to 51.2MHz |1024 | 512 | 256 |
*/
static const struct cs42xx8_ratios cs42xx8_ratios[] = {
{ 64, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_256(4) },
{ 96, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_384(4) },
{ 128, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_512(4) },
{ 192, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_768(4) },
{ 256, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_256(1) },
{ 384, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_384(1) },
{ 512, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_512(1) },
{ 768, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_768(1) },
{ 1024, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_1024(1) }
{ 0, 1029000, 12800000, {256, 128, 64} },
{ 2, 1536000, 19200000, {384, 192, 96} },
{ 4, 2048000, 25600000, {512, 256, 128} },
{ 6, 3072000, 38400000, {768, 384, 192} },
{ 8, 4096000, 51200000, {1024, 512, 256} },
};
static int cs42xx8_set_dai_sysclk(struct snd_soc_dai *codec_dai,
@ -257,14 +264,68 @@ static int cs42xx8_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_component *component = dai->component;
struct cs42xx8_priv *cs42xx8 = snd_soc_component_get_drvdata(component);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
u32 ratio = cs42xx8->sysclk / params_rate(params);
u32 i, fm, val, mask;
u32 ratio[2];
u32 rate[2];
u32 fm[2];
u32 i, val, mask;
bool condition1, condition2;
if (tx)
cs42xx8->tx_channels = params_channels(params);
rate[tx] = params_rate(params);
rate[!tx] = cs42xx8->rate[!tx];
ratio[tx] = rate[tx] > 0 ? cs42xx8->sysclk / rate[tx] : 0;
ratio[!tx] = rate[!tx] > 0 ? cs42xx8->sysclk / rate[!tx] : 0;
/* Get functional mode for tx and rx according to rate */
for (i = 0; i < 2; i++) {
if (cs42xx8->slave_mode) {
fm[i] = CS42XX8_FM_AUTO;
} else {
if (rate[i] < 50000) {
fm[i] = CS42XX8_FM_SINGLE;
} else if (rate[i] > 50000 && rate[i] < 100000) {
fm[i] = CS42XX8_FM_DOUBLE;
} else if (rate[i] > 100000 && rate[i] < 200000) {
fm[i] = CS42XX8_FM_QUAD;
} else {
dev_err(component->dev,
"unsupported sample rate\n");
return -EINVAL;
}
}
}
for (i = 0; i < ARRAY_SIZE(cs42xx8_ratios); i++) {
if (cs42xx8_ratios[i].ratio == ratio)
/* Is the ratio[tx] valid ? */
condition1 = ((fm[tx] == CS42XX8_FM_AUTO) ?
(cs42xx8_ratios[i].ratio[0] == ratio[tx] ||
cs42xx8_ratios[i].ratio[1] == ratio[tx] ||
cs42xx8_ratios[i].ratio[2] == ratio[tx]) :
(cs42xx8_ratios[i].ratio[fm[tx]] == ratio[tx])) &&
cs42xx8->sysclk >= cs42xx8_ratios[i].min_mclk &&
cs42xx8->sysclk <= cs42xx8_ratios[i].max_mclk;
if (!ratio[tx])
condition1 = true;
/* Is the ratio[!tx] valid ? */
condition2 = ((fm[!tx] == CS42XX8_FM_AUTO) ?
(cs42xx8_ratios[i].ratio[0] == ratio[!tx] ||
cs42xx8_ratios[i].ratio[1] == ratio[!tx] ||
cs42xx8_ratios[i].ratio[2] == ratio[!tx]) :
(cs42xx8_ratios[i].ratio[fm[!tx]] == ratio[!tx]));
if (!ratio[!tx])
condition2 = true;
/*
* Both ratio[tx] and ratio[!tx] is valid, then we get
* a proper MFreq.
*/
if (condition1 && condition2)
break;
}
@ -273,18 +334,34 @@ static int cs42xx8_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
mask = CS42XX8_FUNCMOD_MFREQ_MASK;
val = cs42xx8_ratios[i].mclk;
cs42xx8->rate[tx] = params_rate(params);
fm = cs42xx8->slave_mode ? CS42XX8_FM_AUTO : cs42xx8_ratios[i].speed;
mask = CS42XX8_FUNCMOD_MFREQ_MASK;
val = cs42xx8_ratios[i].mfreq;
regmap_update_bits(cs42xx8->regmap, CS42XX8_FUNCMOD,
CS42XX8_FUNCMOD_xC_FM_MASK(tx) | mask,
CS42XX8_FUNCMOD_xC_FM(tx, fm) | val);
CS42XX8_FUNCMOD_xC_FM(tx, fm[tx]) | val);
return 0;
}
static int cs42xx8_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct cs42xx8_priv *cs42xx8 = snd_soc_component_get_drvdata(component);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
/* Clear stored rate */
cs42xx8->rate[tx] = 0;
regmap_update_bits(cs42xx8->regmap, CS42XX8_FUNCMOD,
CS42XX8_FUNCMOD_xC_FM_MASK(tx),
CS42XX8_FUNCMOD_xC_FM(tx, CS42XX8_FM_AUTO));
return 0;
}
static int cs42xx8_digital_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_component *component = dai->component;
@ -302,6 +379,7 @@ static const struct snd_soc_dai_ops cs42xx8_dai_ops = {
.set_fmt = cs42xx8_set_dai_fmt,
.set_sysclk = cs42xx8_set_dai_sysclk,
.hw_params = cs42xx8_hw_params,
.hw_free = cs42xx8_hw_free,
.digital_mute = cs42xx8_digital_mute,
};