diff --git a/include/sound/sof.h b/include/sound/sof.h index 646a655c3c6bf0..b93bb8038080db 100644 --- a/include/sound/sof.h +++ b/include/sound/sof.h @@ -103,5 +103,6 @@ struct sof_dev_desc { int sof_nocodec_setup(struct device *dev, const struct snd_sof_dsp_ops *ops, int (*pcm_dai_link_fixup)(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params)); +int sof_dai_get_mclk(struct snd_soc_pcm_runtime *rtd); #endif diff --git a/sound/soc/sof/sof-audio.c b/sound/soc/sof/sof-audio.c index 3277489fee5e21..928d7a46d8209f 100644 --- a/sound/soc/sof/sof-audio.c +++ b/sound/soc/sof/sof-audio.c @@ -433,6 +433,33 @@ struct snd_sof_dai *snd_sof_find_dai(struct snd_soc_component *scomp, return NULL; } +/* + * Helper to get SSP MCLK from a pcm_runtime. + * Return 0 if not exist. + */ +int sof_dai_get_mclk(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME); + struct snd_sof_dai *dai = + snd_sof_find_dai(component, (char *)rtd->dai_link->name); + + /* use the tplg configured mclk if existed */ + if (!dai || !dai->dai_config) + return 0; + + switch (dai->dai_config->type) { + case SOF_DAI_INTEL_SSP: + return dai->dai_config->ssp.mclk_rate; + default: + /* not yet implemented for platforms other than the above */ + dev_err(rtd->dev, "mclk for dai_config->type %d not supported yet!\n", + dai->dai_config->type); + return -EINVAL; + } +} +EXPORT_SYMBOL(sof_dai_get_mclk); + /* * SOF Driver enumeration. */