Unverified Commit bc619cfc authored by Brent Lu's avatar Brent Lu Committed by Mark Brown
Browse files

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



Add helper function sof_dai_ssp_bclk() to get the BCLK frequency
configured by topology.

Reviewed-by: default avatarBard Liao <bard.liao@intel.com>
Signed-off-by: default avatarBrent Lu <brent.lu@intel.com>
Signed-off-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210625205042.65181-4-pierre-louis.bossart@linux.intel.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent f99acc25

include/sound/sof.h

+1 −0
Original line number Diff line number Diff line
@@ -101,5 +101,6 @@ struct sof_dev_desc { 
};



int sof_dai_get_mclk(struct snd_soc_pcm_runtime *rtd);

int sof_dai_get_bclk(struct snd_soc_pcm_runtime *rtd);



#endif

sound/soc/sof/sof-audio.c

+35 −7
Original line number Diff line number Diff line
@@ -433,11 +433,10 @@ 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)

#define SOF_DAI_CLK_INTEL_SSP_MCLK	0

#define SOF_DAI_CLK_INTEL_SSP_BCLK	1



static int sof_dai_get_clk(struct snd_soc_pcm_runtime *rtd, int clk_type)

{

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
@@ -450,16 +449,45 @@ int sof_dai_get_mclk(struct snd_soc_pcm_runtime *rtd) 


	switch (dai->dai_config->type) {

	case SOF_DAI_INTEL_SSP:

		switch (clk_type) {

		case SOF_DAI_CLK_INTEL_SSP_MCLK:

			return dai->dai_config->ssp.mclk_rate;

		case SOF_DAI_CLK_INTEL_SSP_BCLK:

			return dai->dai_config->ssp.bclk_rate;

		default:

			dev_err(rtd->dev, "fail to get SSP clk %d rate\n",

				clk_type);

			return -EINVAL;

		}

		break;

	default:

		/* not yet implemented for platforms other than the above */

		dev_err(rtd->dev, "mclk for dai_config->type %d not supported yet!\n",

		dev_err(rtd->dev, "DAI type %d not supported yet!\n",

			dai->dai_config->type);

		return -EINVAL;

	}

}



/*

 * 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)

{

	return sof_dai_get_clk(rtd, SOF_DAI_CLK_INTEL_SSP_MCLK);

}

EXPORT_SYMBOL(sof_dai_get_mclk);



/*

 * Helper to get SSP BCLK from a pcm_runtime.

 * Return 0 if not exist.

 */

int sof_dai_get_bclk(struct snd_soc_pcm_runtime *rtd)

{

	return sof_dai_get_clk(rtd, SOF_DAI_CLK_INTEL_SSP_BCLK);

}

EXPORT_SYMBOL(sof_dai_get_bclk);



/*

 * SOF Driver enumeration.

 */