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ASoC: fsl_sai: Add PDM daifmt support

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PDM format is used for 1-bit stream, so clear the FBT and SYWD,
and the each dataline only has one channel data.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1655451877-16382-2-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Shengjiu Wang 2022-06-17 15:44:31 +08:00 committed by Mark Brown
parent 658e959530
commit c111c2ddb3
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 16 additions and 2 deletions
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17
sound/soc/fsl/fsl_sai.c
View File

@ -224,6 +224,7 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
if (!sai->is_lsb_first)
val_cr4 |= FSL_SAI_CR4_MF;
sai->is_pdm_mode = false;
/* DAI mode */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
@ -262,6 +263,11 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
val_cr2 |= FSL_SAI_CR2_BCP;
sai->is_dsp_mode = true;
break;
case SND_SOC_DAIFMT_PDM:
val_cr2 |= FSL_SAI_CR2_BCP;
val_cr4 &= ~FSL_SAI_CR4_MF;
sai->is_pdm_mode = true;
break;
case SND_SOC_DAIFMT_RIGHT_J:
/* To be done */
default:
@ -470,6 +476,13 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
pins = DIV_ROUND_UP(channels, slots);
/*
* PDM mode, channels are independent
* each channels are on one dataline/FIFO.
*/
if (sai->is_pdm_mode)
pins = channels;
if (!sai->is_consumer_mode) {
if (sai->bclk_ratio)
ret = fsl_sai_set_bclk(cpu_dai, tx,
@ -492,13 +505,13 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
}
}
if (!sai->is_dsp_mode)
if (!sai->is_dsp_mode && !sai->is_pdm_mode)
val_cr4 |= FSL_SAI_CR4_SYWD(slot_width);
val_cr5 |= FSL_SAI_CR5_WNW(slot_width);
val_cr5 |= FSL_SAI_CR5_W0W(slot_width);
if (sai->is_lsb_first)
if (sai->is_lsb_first || sai->is_pdm_mode)
val_cr5 |= FSL_SAI_CR5_FBT(0);
else
val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1);

1
sound/soc/fsl/fsl_sai.h
View File

@ -259,6 +259,7 @@ struct fsl_sai {
bool is_consumer_mode;
bool is_lsb_first;
bool is_dsp_mode;
bool is_pdm_mode;
bool synchronous[2];
unsigned int mclk_id[2];