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@xxxxxxx>
---
sound/soc/fsl/fsl_sai.c | 17 +++++++++++++++--
sound/soc/fsl/fsl_sai.h | 1 +
2 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index 4f5bd9597c74..d11ee3b6f163 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -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);
diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h
index 1c8f5ca07f9d..bc2a86a413e1 100644
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -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];
--
2.17.1
