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Commit 47c88fff authored by Liam Girdwood's avatar Liam Girdwood Committed by Mark Brown
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ASoC: dpcm: Add API for DAI link substream and runtime lookup 



Some component drivers will need to be able to look up their
DAI link substream and RTD data. Provide a mechanism for this.

Signed-off-by: default avatarLiam Girdwood <lrg@ti.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 618dae11

include/sound/soc.h

+5 −0
Original line number Diff line number Diff line
@@ -362,6 +362,11 @@ int snd_soc_platform_write(struct snd_soc_platform *platform, 
					unsigned int reg, unsigned int val);

int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);



struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,

		const char *dai_link, int stream);

struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,

		const char *dai_link);



/* Utility functions to get clock rates from various things */

int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots);

int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params);

sound/soc/soc-core.c

+29 −0
Original line number Diff line number Diff line
@@ -465,6 +465,35 @@ static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) 
}

#endif



struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,

		const char *dai_link, int stream)

{

	int i;



	for (i = 0; i < card->num_links; i++) {

		if (card->rtd[i].dai_link->no_pcm &&

			!strcmp(card->rtd[i].dai_link->name, dai_link))

			return card->rtd[i].pcm->streams[stream].substream;

	}

	dev_dbg(card->dev, "failed to find dai link %s\n", dai_link);

	return NULL;

}

EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);



struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,

		const char *dai_link)

{

	int i;



	for (i = 0; i < card->num_links; i++) {

		if (!strcmp(card->rtd[i].dai_link->name, dai_link))

			return &card->rtd[i];

	}

	dev_dbg(card->dev, "failed to find rtd %s\n", dai_link);

	return NULL;

}

EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);



#ifdef CONFIG_SND_SOC_AC97_BUS

/* unregister ac97 codec */

static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)