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ASoC: qcom: sc8280xp: add TDM hw_params support

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Add TDM backend handling to the sc8280xp machine driver.

Use the common QCOM DAI-node TDM helper to parse the standard
DAI TDM slot properties from backend CPU and codec endpoints. Reuse the
parsed configuration when programming DAIs so hw_params does not need a
second DT traversal.

Derive the LPASS backend bit clock from the runtime TDM parameters and
request it through the backend child-clock path using LPAIF_MI2S_BCLK.

Program codec sysclk in hw_params so codec PLL setup happens before the
stream is triggered.

Signed-off-by: Prasad Kumpatla <prasad.kumpatla@oss.qualcomm.com>
Link: https://patch.msgid.link/20260804070307.117119-8-prasad.kumpatla@oss.qualcomm.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Prasad Kumpatla 2026-08-04 12:33:07 +05:30 committed by Mark Brown
parent 1e844ecbc9
commit a689ee3b2f
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GPG Key ID: 24D68B725D5487D0
1 changed files with 59 additions and 0 deletions
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59
sound/soc/qcom/sc8280xp.c
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@ -106,6 +106,63 @@ static inline int sc8280xp_get_bclk_freq(struct snd_pcm_hw_params *params)
snd_pcm_format_width(params_format(params)));
}
static int sc8280xp_tdm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct sc8280xp_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
struct snd_soc_dai *codec_dai;
struct qcom_snd_tdm_slot_cfg cpu_cfg;
struct qcom_snd_tdm_slot_cfg codec_cfg;
unsigned int bclk_freq;
int ret;
int i;
ret = qcom_snd_get_dai_tdm_slots(rtd, &cpu_cfg, &codec_cfg);
if (ret)
return ret == -EINVAL ? 0 : ret;
if (!cpu_cfg.slots)
return 0;
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_BP_FP);
if (ret)
return ret;
ret = qcom_snd_apply_dai_tdm_slots_cfg(rtd, &cpu_cfg, &codec_cfg);
if (ret)
return ret;
bclk_freq = snd_soc_tdm_params_to_bclk(params, cpu_cfg.slot_width, cpu_cfg.slots, 1);
if (!bclk_freq)
return -EINVAL;
if (data->priv->mi2s_bclk_enable) {
ret = snd_soc_dai_set_sysclk(cpu_dai, LPAIF_MI2S_BCLK, bclk_freq,
SND_SOC_CLOCK_IN);
if (ret) {
dev_err(rtd->dev, "%s: failed to set cpu sysclk: %d\n",
__func__, ret);
return ret;
}
}
if (data->priv->codec_sysclk_set) {
for_each_rtd_codec_dais(rtd, i, codec_dai) {
ret = snd_soc_dai_set_sysclk(codec_dai, 0, bclk_freq,
SND_SOC_CLOCK_IN);
if (ret) {
dev_err(rtd->dev, "%s: failed to set codec sysclk on %s: %d\n",
__func__, codec_dai->name, ret);
return ret;
}
}
}
return 0;
}
static int sc8280xp_snd_init(struct snd_soc_pcm_runtime *rtd)
{
struct sc8280xp_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
@ -229,6 +286,8 @@ static int sc8280xp_snd_hw_params(struct snd_pcm_substream *substream,
return ret;
}
break;
case PRIMARY_TDM_RX_0 ... QUINARY_TDM_TX_7:
return sc8280xp_tdm_hw_params(substream, params);
default:
break;
}