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ASoC: SOF: add a helper to get topology configured mclk 

Add helper sof_dai_ssp_mclk to get the topology configured MCLK from a
pcm_runtime, return 0 if it is not available, and error if the dai type
is not SSP at the moment.

Export the helper for external use, e.g. from machine drivers.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@gmail.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20210319124950.3853994-1-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Keyon Jie 2021-03-19 14:49:49 +02:00 committed by Mark Brown
parent 2277e7e36b
commit b951b51e2c
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GPG Key ID: 24D68B725D5487D0
2 changed files with 28 additions and 0 deletions
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1
include/sound/sof.h
View File

@ -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

27
sound/soc/sof/sof-audio.c
View File

@ -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.
*/