soc-dai.c

// SPDX-License-Identifier: GPL-2.0
//
// soc-dai.c
//
// Copyright (C) 2019 Renesas Electronics Corp.
// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
//

#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-link.h>

#define soc_dai_ret(dai, ret) _soc_dai_ret(dai, __func__, ret)
static inline int _soc_dai_ret(struct snd_soc_dai *dai,
			       const char *func, int ret)
{
	/* Positive, Zero values are not errors */
	if (ret >= 0)
		return ret;

	/* Negative values might be errors */
	switch (ret) {
	case -EPROBE_DEFER:
	case -ENOTSUPP:
		break;
	default:
		dev_err(dai->dev,
			"ASoC: error at %s on %s: %d\n",
			func, dai->name, ret);
	}

	return ret;
}

/*
 * We might want to check substream by using list.
 * In such case, we can update these macros.
 */
#define soc_dai_mark_push(dai, substream, tgt)	((dai)->mark_##tgt = substream)
#define soc_dai_mark_pop(dai, substream, tgt)	((dai)->mark_##tgt = NULL)
#define soc_dai_mark_match(dai, substream, tgt)	((dai)->mark_##tgt == substream)

/**
 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
 * @dai: DAI
 * @clk_id: DAI specific clock ID
 * @freq: new clock frequency in Hz
 * @dir: new clock direction - input/output.
 *
 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
 */
int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
			   unsigned int freq, int dir)
{
	int ret;

	if (dai->driver->ops &&
	    dai->driver->ops->set_sysclk)
		ret = dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
	else
		ret = snd_soc_component_set_sysclk(dai->component, clk_id, 0,
						   freq, dir);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
 * @div_id: DAI specific clock divider ID
 * @div: new clock divisor.
 *
 * Configures the clock dividers. This is used to derive the best DAI bit and
 * frame clocks from the system or master clock. It's best to set the DAI bit
 * and frame clocks as low as possible to save system power.
 */
int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
			   int div_id, int div)
{
	int ret = -EINVAL;

	if (dai->driver->ops &&
	    dai->driver->ops->set_clkdiv)
		ret = dai->driver->ops->set_clkdiv(dai, div_id, div);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);

/**
 * snd_soc_dai_set_pll - configure DAI PLL.
 * @dai: DAI
 * @pll_id: DAI specific PLL ID
 * @source: DAI specific source for the PLL
 * @freq_in: PLL input clock frequency in Hz
 * @freq_out: requested PLL output clock frequency in Hz
 *
 * Configures and enables PLL to generate output clock based on input clock.
 */
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
			unsigned int freq_in, unsigned int freq_out)
{
	int ret;

	if (dai->driver->ops &&
	    dai->driver->ops->set_pll)
		ret = dai->driver->ops->set_pll(dai, pll_id, source,
						freq_in, freq_out);
	else
		ret = snd_soc_component_set_pll(dai->component, pll_id, source,
						freq_in, freq_out);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);

/**
 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
 * @dai: DAI
 * @ratio: Ratio of BCLK to Sample rate.
 *
 * Configures the DAI for a preset BCLK to sample rate ratio.
 */
int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
{
	int ret = -EINVAL;

	if (dai->driver->ops &&
	    dai->driver->ops->set_bclk_ratio)
		ret = dai->driver->ops->set_bclk_ratio(dai, ratio);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);

/**
 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
 * @dai: DAI
 * @fmt: SND_SOC_DAIFMT_* format value.
 *
 * Configures the DAI hardware format and clocking.
 */
int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	int ret = -ENOTSUPP;

	if (dai->driver->ops &&
	    dai->driver->ops->set_fmt)
		ret = dai->driver->ops->set_fmt(dai, fmt);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
 * @slots: Number of slots in use.
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
 *
 * Generates the TDM tx and rx slot default masks for DAI.
 */
static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
				       unsigned int *tx_mask,
				       unsigned int *rx_mask)
{
	if (*tx_mask || *rx_mask)
		return 0;

	if (!slots)
		return -EINVAL;

	*tx_mask = (1 << slots) - 1;
	*rx_mask = (1 << slots) - 1;

	return 0;
}

/**
 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
 * @dai: The DAI to configure
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
 * @slots: Number of slots in use.
 * @slot_width: Width in bits for each slot.
 *
 * This function configures the specified DAI for TDM operation. @slot contains
 * the total number of slots of the TDM stream and @slot_with the width of each
 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
 * active slots of the TDM stream for the specified DAI, i.e. which slots the
 * DAI should write to or read from. If a bit is set the corresponding slot is
 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
 * the first slot, bit 1 to the second slot and so on. The first active slot
 * maps to the first channel of the DAI, the second active slot to the second
 * channel and so on.
 *
 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
 * @rx_mask and @slot_width will be ignored.
 *
 * Returns 0 on success, a negative error code otherwise.
 */
int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
			     unsigned int tx_mask, unsigned int rx_mask,
			     int slots, int slot_width)
{
	int ret = -ENOTSUPP;

	if (dai->driver->ops &&
	    dai->driver->ops->xlate_tdm_slot_mask)
		dai->driver->ops->xlate_tdm_slot_mask(slots,
						      &tx_mask, &rx_mask);
	else
		snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);

	dai->tx_mask = tx_mask;
	dai->rx_mask = rx_mask;

	if (dai->driver->ops &&
	    dai->driver->ops->set_tdm_slot)
		ret = dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
						      slots, slot_width);
	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

/**
 * snd_soc_dai_set_channel_map - configure DAI audio channel map
 * @dai: DAI
 * @tx_num: how many TX channels
 * @tx_slot: pointer to an array which imply the TX slot number channel
 *           0~num-1 uses
 * @rx_num: how many RX channels
 * @rx_slot: pointer to an array which imply the RX slot number channel
 *           0~num-1 uses
 *
 * configure the relationship between channel number and TDM slot number.
 */
int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
				unsigned int tx_num, unsigned int *tx_slot,
				unsigned int rx_num, unsigned int *rx_slot)
{
	int ret = -ENOTSUPP;

	if (dai->driver->ops &&
	    dai->driver->ops->set_channel_map)
		ret = dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
							rx_num, rx_slot);
	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

/**
 * snd_soc_dai_get_channel_map - Get DAI audio channel map
 * @dai: DAI
 * @tx_num: how many TX channels
 * @tx_slot: pointer to an array which imply the TX slot number channel
 *           0~num-1 uses
 * @rx_num: how many RX channels
 * @rx_slot: pointer to an array which imply the RX slot number channel
 *           0~num-1 uses
 */
int snd_soc_dai_get_channel_map(struct snd_soc_dai *dai,
				unsigned int *tx_num, unsigned int *tx_slot,
				unsigned int *rx_num, unsigned int *rx_slot)
{
	int ret = -ENOTSUPP;

	if (dai->driver->ops &&
	    dai->driver->ops->get_channel_map)
		ret = dai->driver->ops->get_channel_map(dai, tx_num, tx_slot,
							rx_num, rx_slot);
	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_get_channel_map);

/**
 * snd_soc_dai_set_tristate - configure DAI system or master clock.
 * @dai: DAI
 * @tristate: tristate enable
 *
 * Tristates the DAI so that others can use it.
 */
int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
{
	int ret = -EINVAL;

	if (dai->driver->ops &&
	    dai->driver->ops->set_tristate)
		ret = dai->driver->ops->set_tristate(dai, tristate);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);

/**
 * snd_soc_dai_digital_mute - configure DAI system or master clock.
 * @dai: DAI
 * @mute: mute enable
 * @direction: stream to mute
 *
 * Mutes the DAI DAC.
 */
int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
			     int direction)
{
	int ret = -ENOTSUPP;

	/*
	 * ignore if direction was CAPTURE
	 * and it had .no_capture_mute flag
	 */
	if (dai->driver->ops &&
	    dai->driver->ops->mute_stream &&
	    (direction == SNDRV_PCM_STREAM_PLAYBACK ||
	     !dai->driver->ops->no_capture_mute))
		ret = dai->driver->ops->mute_stream(dai, mute, direction);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

int snd_soc_dai_hw_params(struct snd_soc_dai *dai,
			  struct snd_pcm_substream *substream,
			  struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	int ret = 0;

	/* perform any topology hw_params fixups before DAI  */
	ret = snd_soc_link_be_hw_params_fixup(rtd, params);
	if (ret < 0)
		goto end;

	if (dai->driver->ops &&
	    dai->driver->ops->hw_params)
		ret = dai->driver->ops->hw_params(substream, params, dai);

	/* mark substream if succeeded */
	if (ret == 0)
		soc_dai_mark_push(dai, substream, hw_params);
end:
	return soc_dai_ret(dai, ret);
}

void snd_soc_dai_hw_free(struct snd_soc_dai *dai,
			 struct snd_pcm_substream *substream,
			 int rollback)
{
	if (rollback && !soc_dai_mark_match(dai, substream, hw_params))
		return;

	if (dai->driver->ops &&
	    dai->driver->ops->hw_free)
		dai->driver->ops->hw_free(substream, dai);

	/* remove marked substream */
	soc_dai_mark_pop(dai, substream, hw_params);
}

int snd_soc_dai_startup(struct snd_soc_dai *dai,
			struct snd_pcm_substream *substream)
{
	int ret = 0;

	if (dai->driver->ops &&
	    dai->driver->ops->startup)
		ret = dai->driver->ops->startup(substream, dai);

	/* mark substream if succeeded */
	if (ret == 0)
		soc_dai_mark_push(dai, substream, startup);

	return soc_dai_ret(dai, ret);
}

void snd_soc_dai_shutdown(struct snd_soc_dai *dai,
			  struct snd_pcm_substream *substream,
			  int rollback)
{
	if (rollback && !soc_dai_mark_match(dai, substream, startup))
		return;

	if (dai->driver->ops &&
	    dai->driver->ops->shutdown)
		dai->driver->ops->shutdown(substream, dai);

	/* remove marked substream */
	soc_dai_mark_pop(dai, substream, startup);
}

snd_pcm_sframes_t snd_soc_dai_delay(struct snd_soc_dai *dai,
				    struct snd_pcm_substream *substream)
{
	int delay = 0;

	if (dai->driver->ops &&
	    dai->driver->ops->delay)
		delay = dai->driver->ops->delay(substream, dai);

	return delay;
}

int snd_soc_dai_compress_new(struct snd_soc_dai *dai,
			     struct snd_soc_pcm_runtime *rtd, int num)
{
	int ret = -ENOTSUPP;
	if (dai->driver->compress_new)
		ret = dai->driver->compress_new(rtd, num);
	return soc_dai_ret(dai, ret);
}

/*
 * snd_soc_dai_stream_valid() - check if a DAI supports the given stream
 *
 * Returns true if the DAI supports the indicated stream type.
 */
bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int dir)
{
	struct snd_soc_pcm_stream *stream = snd_soc_dai_get_pcm_stream(dai, dir);

	/* If the codec specifies any channels at all, it supports the stream */
	return stream->channels_min;
}

/*
 * snd_soc_dai_link_set_capabilities() - set dai_link properties based on its DAIs
 */
void snd_soc_dai_link_set_capabilities(struct snd_soc_dai_link *dai_link)
{
	struct snd_soc_dai_link_component *cpu;
	struct snd_soc_dai_link_component *codec;
	struct snd_soc_dai *dai;
	bool supported[SNDRV_PCM_STREAM_LAST + 1];
	bool supported_cpu;
	bool supported_codec;
	int direction;
	int i;

	for_each_pcm_streams(direction) {
		supported_cpu = false;
		supported_codec = false;

		for_each_link_cpus(dai_link, i, cpu) {
			dai = snd_soc_find_dai_with_mutex(cpu);
			if (dai && snd_soc_dai_stream_valid(dai, direction)) {
				supported_cpu = true;
				break;
			}
		}
		for_each_link_codecs(dai_link, i, codec) {
			dai = snd_soc_find_dai_with_mutex(codec);
			if (dai && snd_soc_dai_stream_valid(dai, direction)) {
				supported_codec = true;
				break;
			}
		}
		supported[direction] = supported_cpu && supported_codec;
	}

	dai_link->dpcm_playback = supported[SNDRV_PCM_STREAM_PLAYBACK];
	dai_link->dpcm_capture  = supported[SNDRV_PCM_STREAM_CAPTURE];
}
EXPORT_SYMBOL_GPL(snd_soc_dai_link_set_capabilities);

void snd_soc_dai_action(struct snd_soc_dai *dai,
			int stream, int action)
{
	/* see snd_soc_dai_stream_active() */
	dai->stream_active[stream]	+= action;

	/* see snd_soc_component_active() */
	dai->component->active		+= action;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_action);

int snd_soc_dai_active(struct snd_soc_dai *dai)
{
	int stream, active;

	active = 0;
	for_each_pcm_streams(stream)
		active += dai->stream_active[stream];

	return active;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_active);

int snd_soc_pcm_dai_probe(struct snd_soc_pcm_runtime *rtd, int order)
{
	struct snd_soc_dai *dai;
	int i;

	for_each_rtd_dais(rtd, i, dai) {
		if (dai->driver->probe_order != order)
			continue;

		if (dai->driver->probe) {
			int ret = dai->driver->probe(dai);

			if (ret < 0)
				return soc_dai_ret(dai, ret);
		}

		dai->probed = 1;
	}

	return 0;
}

int snd_soc_pcm_dai_remove(struct snd_soc_pcm_runtime *rtd, int order)
{
	struct snd_soc_dai *dai;
	int i, r, ret = 0;

	for_each_rtd_dais(rtd, i, dai) {
		if (dai->driver->remove_order != order)
			continue;

		if (dai->probed &&
		    dai->driver->remove) {
			r = dai->driver->remove(dai);
			if (r < 0)
				ret = r; /* use last error */
		}

		dai->probed = 0;
	}

	return ret;
}

int snd_soc_pcm_dai_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_dai *dai;
	int i, ret = 0;

	for_each_rtd_dais(rtd, i, dai) {
		if (dai->driver->pcm_new) {
			ret = dai->driver->pcm_new(rtd, dai);
			if (ret < 0)
				return soc_dai_ret(dai, ret);
		}
	}

	return 0;
}

int snd_soc_pcm_dai_prepare(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct snd_soc_dai *dai;
	int i, ret;

	for_each_rtd_dais(rtd, i, dai) {
		if (dai->driver->ops &&
		    dai->driver->ops->prepare) {
			ret = dai->driver->ops->prepare(substream, dai);
			if (ret < 0)
				return soc_dai_ret(dai, ret);
		}
	}

	return 0;
}

static int soc_dai_trigger(struct snd_soc_dai *dai,
			   struct snd_pcm_substream *substream, int cmd)
{
	int ret = 0;

	if (dai->driver->ops &&
	    dai->driver->ops->trigger)
		ret = dai->driver->ops->trigger(substream, cmd, dai);

	return soc_dai_ret(dai, ret);
}

int snd_soc_pcm_dai_trigger(struct snd_pcm_substream *substream,
			    int cmd, int rollback)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct snd_soc_dai *dai;
	int i, r, ret = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		for_each_rtd_dais(rtd, i, dai) {
			ret = soc_dai_trigger(dai, substream, cmd);
			if (ret < 0)
				break;
			soc_dai_mark_push(dai, substream, trigger);
		}
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		for_each_rtd_dais(rtd, i, dai) {
			if (rollback && !soc_dai_mark_match(dai, substream, trigger))
				continue;

			r = soc_dai_trigger(dai, substream, cmd);
			if (r < 0)
				ret = r; /* use last ret */
			soc_dai_mark_pop(dai, substream, trigger);
		}
	}

	return ret;
}

int snd_soc_pcm_dai_bespoke_trigger(struct snd_pcm_substream *substream,
				    int cmd)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct snd_soc_dai *dai;
	int i, ret;

	for_each_rtd_dais(rtd, i, dai) {
		if (dai->driver->ops &&
		    dai->driver->ops->bespoke_trigger) {
			ret = dai->driver->ops->bespoke_trigger(substream,
								cmd, dai);
			if (ret < 0)
				return soc_dai_ret(dai, ret);
		}
	}

	return 0;
}

int snd_soc_dai_compr_startup(struct snd_soc_dai *dai,
			      struct snd_compr_stream *cstream)
{
	int ret = 0;

	if (dai->driver->cops &&
	    dai->driver->cops->startup)
		ret = dai->driver->cops->startup(cstream, dai);

	/* mark cstream if succeeded */
	if (ret == 0)
		soc_dai_mark_push(dai, cstream, compr_startup);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_compr_startup);

void snd_soc_dai_compr_shutdown(struct snd_soc_dai *dai,
				struct snd_compr_stream *cstream,
				int rollback)
{
	if (rollback && !soc_dai_mark_match(dai, cstream, compr_startup))
		return;

	if (dai->driver->cops &&
	    dai->driver->cops->shutdown)
		dai->driver->cops->shutdown(cstream, dai);

	/* remove marked cstream */
	soc_dai_mark_pop(dai, cstream, compr_startup);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_compr_shutdown);

int snd_soc_dai_compr_trigger(struct snd_soc_dai *dai,
			      struct snd_compr_stream *cstream, int cmd)
{
	int ret = 0;

	if (dai->driver->cops &&
	    dai->driver->cops->trigger)
		ret = dai->driver->cops->trigger(cstream, cmd, dai);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_compr_trigger);

int snd_soc_dai_compr_set_params(struct snd_soc_dai *dai,
				 struct snd_compr_stream *cstream,
				 struct snd_compr_params *params)
{
	int ret = 0;

	if (dai->driver->cops &&
	    dai->driver->cops->set_params)
		ret = dai->driver->cops->set_params(cstream, params, dai);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_compr_set_params);

int snd_soc_dai_compr_get_params(struct snd_soc_dai *dai,
				 struct snd_compr_stream *cstream,
				 struct snd_codec *params)
{
	int ret = 0;

	if (dai->driver->cops &&
	    dai->driver->cops->get_params)
		ret = dai->driver->cops->get_params(cstream, params, dai);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_compr_get_params);

int snd_soc_dai_compr_ack(struct snd_soc_dai *dai,
			  struct snd_compr_stream *cstream,
			  size_t bytes)
{
	int ret = 0;

	if (dai->driver->cops &&
	    dai->driver->cops->ack)
		ret = dai->driver->cops->ack(cstream, bytes, dai);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_compr_ack);

int snd_soc_dai_compr_pointer(struct snd_soc_dai *dai,
			      struct snd_compr_stream *cstream,
			      struct snd_compr_tstamp *tstamp)
{
	int ret = 0;

	if (dai->driver->cops &&
	    dai->driver->cops->pointer)
		ret = dai->driver->cops->pointer(cstream, tstamp, dai);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_compr_pointer);

int snd_soc_dai_compr_set_metadata(struct snd_soc_dai *dai,
				   struct snd_compr_stream *cstream,
				   struct snd_compr_metadata *metadata)
{
	int ret = 0;

	if (dai->driver->cops &&
	    dai->driver->cops->set_metadata)
		ret = dai->driver->cops->set_metadata(cstream, metadata, dai);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_compr_set_metadata);

int snd_soc_dai_compr_get_metadata(struct snd_soc_dai *dai,
				   struct snd_compr_stream *cstream,
				   struct snd_compr_metadata *metadata)
{
	int ret = 0;

	if (dai->driver->cops &&
	    dai->driver->cops->get_metadata)
		ret = dai->driver->cops->get_metadata(cstream, metadata, dai);

	return soc_dai_ret(dai, ret);
}
EXPORT_SYMBOL_GPL(snd_soc_dai_compr_get_metadata);