[PATCH 2/3] ASoC: codecs: rtq9128: Fix TDM enable and DAI format control flow

cy_huang
2023-10-20T09:51:26Z

To enable TDM mode, the current control flow limits the function
calling order should be 'set_tdm_slot->set_dai_fmt'. But not all
platform sound card like as simeple card to follow this design.
To bypass this limit, adjust the DAI format setting in runtime
'hw_param' callback.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---
sound/soc/codecs/rtq9128.c | 67 ++++++++++++++++++++------------------
1 file changed, 36 insertions(+), 31 deletions(-)

diff --git a/sound/soc/codecs/rtq9128.c b/sound/soc/codecs/rtq9128.c
index 8c1c3c65475e..8a61a8a32db1 100644
--- a/sound/soc/codecs/rtq9128.c
+++ b/sound/soc/codecs/rtq9128.c
@@ -59,6 +59,7 @@

struct rtq9128_data {
struct gpio_desc *enable;
+ unsigned int daifmt;
int tdm_slots;
int tdm_slot_width;
bool tdm_input_data2_select;
@@ -437,10 +438,7 @@ static const struct snd_soc_component_driver rtq9128_comp_driver = {
static int rtq9128_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct rtq9128_data *data = snd_soc_dai_get_drvdata(dai);
- struct snd_soc_component *comp = dai->component;
struct device *dev = dai->dev;
- unsigned int audfmt, fmtval;
- int ret;

dev_dbg(dev, "%s: fmt 0x%8x\n", __func__, fmt);

@@ -450,35 +448,10 @@ static int rtq9128_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
return -EINVAL;
}

- fmtval = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
- if (data->tdm_slots && fmtval != SND_SOC_DAIFMT_DSP_A && fmtval != SND_SOC_DAIFMT_DSP_B) {
- dev_err(dev, "TDM is used, format only support DSP_A or DSP_B\n");
- return -EINVAL;
- }
+ /* Store here and will be used in runtime hw_params for DAI format setting */
+ data->daifmt = fmt;

- switch (fmtval) {
- case SND_SOC_DAIFMT_I2S:
- audfmt = 8;
- break;
- case SND_SOC_DAIFMT_LEFT_J:
- audfmt = 9;
- break;
- case SND_SOC_DAIFMT_RIGHT_J:
- audfmt = 10;
- break;
- case SND_SOC_DAIFMT_DSP_A:
- audfmt = data->tdm_slots ? 12 : 11;
- break;
- case SND_SOC_DAIFMT_DSP_B:
- audfmt = data->tdm_slots ? 4 : 3;
- break;
- default:
- dev_err(dev, "Unsupported format 0x%8x\n", fmt);
- return -EINVAL;
- }
-
- ret = snd_soc_component_write_field(comp, RTQ9128_REG_I2S_OPT, RTQ9128_AUDFMT_MASK, audfmt);
- return ret < 0 ? ret : 0;
+ return 0;
}

static int rtq9128_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
@@ -554,10 +527,38 @@ static int rtq9128_dai_hw_params(struct snd_pcm_substream *stream, struct snd_pc
unsigned int width, slot_width, bitrate, audbit, dolen;
struct snd_soc_component *comp = dai->component;
struct device *dev = dai->dev;
+ unsigned int fmtval, audfmt;
int ret;

dev_dbg(dev, "%s: width %d\n", __func__, params_width(param));

+ fmtval = FIELD_GET(SND_SOC_DAIFMT_FORMAT_MASK, data->daifmt);
+ if (data->tdm_slots && fmtval != SND_SOC_DAIFMT_DSP_A && fmtval != SND_SOC_DAIFMT_DSP_B) {
+ dev_err(dev, "TDM is used, format only support DSP_A or DSP_B\n");
+ return -EINVAL;
+ }
+
+ switch (fmtval) {
+ case SND_SOC_DAIFMT_I2S:
+ audfmt = 8;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ audfmt = 9;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ audfmt = 10;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ audfmt = data->tdm_slots ? 12 : 11;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ audfmt = data->tdm_slots ? 4 : 3;
+ break;
+ default:
+ dev_err(dev, "Unsupported format 0x%8x\n", fmtval);
+ return -EINVAL;
+ }
+
switch (width = params_width(param)) {
case 16:
audbit = 0;
@@ -611,6 +612,10 @@ static int rtq9128_dai_hw_params(struct snd_pcm_substream *stream, struct snd_pc
return -EINVAL;
}

+ ret = snd_soc_component_write_field(comp, RTQ9128_REG_I2S_OPT, RTQ9128_AUDFMT_MASK, audfmt);
+ if (ret < 0)
+ return ret;
+
ret = snd_soc_component_write_field(comp, RTQ9128_REG_I2S_OPT, RTQ9128_AUDBIT_MASK, audbit);
if (ret < 0)
return ret;
--
2.34.1