[PATCH 1/2] ASoC: SOF: add a helper to get topology configured mclk
Kai Vehmanen
kai.vehmanen at linux.intel.com
Fri Mar 19 13:49:49 CET 2021
From: Keyon Jie <yang.jie at linux.intel.com>
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 at linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski at linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta at gmail.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen at linux.intel.com>
---
include/sound/sof.h | 1 +
sound/soc/sof/sof-audio.c | 27 +++++++++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/include/sound/sof.h b/include/sound/sof.h
index 646a655c3c6b..b93bb8038080 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 3277489fee5e..928d7a46d820 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.
*/
base-commit: bb9faeccbd6c05c6c2525be90f663f8694dd8bf6
--
2.29.2
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