path: root/sound/soc/generic/simple-card-utils.c

// SPDX-License-Identifier: GPL-2.0
//
// simple-card-utils.c
//
// Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

#include <dt-bindings/sound/audio-graph.h>
#include <linux/cleanup.h>
#include <linux/clk.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <sound/jack.h>
#include <sound/pcm_params.h>
#include <sound/simple_card_utils.h>

int simple_util_get_sample_fmt(struct simple_util_data *data)
{
	int i;
	int val = -EINVAL;

	struct {
		char *fmt;
		u32 val;
	} of_sample_fmt_table[] = {
		{ "s8",		SNDRV_PCM_FORMAT_S8},
		{ "s16_le",	SNDRV_PCM_FORMAT_S16_LE},
		{ "s24_le",	SNDRV_PCM_FORMAT_S24_LE},
		{ "s24_3le",	SNDRV_PCM_FORMAT_S24_3LE},
		{ "s32_le",	SNDRV_PCM_FORMAT_S32_LE},
	};

	for (i = 0; i < ARRAY_SIZE(of_sample_fmt_table); i++) {
		if (!strcmp(data->convert_sample_format,
			    of_sample_fmt_table[i].fmt)) {
			val = of_sample_fmt_table[i].val;
			break;
		}
	}
	return val;
}
EXPORT_SYMBOL_GPL(simple_util_get_sample_fmt);

static void simple_fixup_sample_fmt(struct simple_util_data *data,
				    struct snd_pcm_hw_params *params)
{
	int val;
	struct snd_mask *mask = hw_param_mask(params,
					      SNDRV_PCM_HW_PARAM_FORMAT);

	val = simple_util_get_sample_fmt(data);
	if (val >= 0) {
		snd_mask_none(mask);
		snd_mask_set(mask, val);
	}
}

void simple_util_parse_convert(struct device_node *np,
			       char *prefix,
			       struct simple_util_data *data)
{
	char prop[128];

	if (!np)
		return;

	if (!prefix)
		prefix = "";

	/* sampling rate convert */
	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-rate");
	of_property_read_u32(np, prop, &data->convert_rate);

	/* channels transfer */
	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels");
	of_property_read_u32(np, prop, &data->convert_channels);

	/* convert sample format */
	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-sample-format");
	of_property_read_string(np, prop, &data->convert_sample_format);
}
EXPORT_SYMBOL_GPL(simple_util_parse_convert);

/**
 * simple_util_is_convert_required() - Query if HW param conversion was requested
 * @data: Link data.
 *
 * Returns true if any HW param conversion was requested for this DAI link with
 * any "convert-xxx" properties.
 */
bool simple_util_is_convert_required(const struct simple_util_data *data)
{
	return data->convert_rate ||
	       data->convert_channels ||
	       data->convert_sample_format;
}
EXPORT_SYMBOL_GPL(simple_util_is_convert_required);

int simple_util_parse_daifmt(struct device *dev,
			     struct device_node *node,
			     struct device_node *codec,
			     char *prefix,
			     unsigned int *retfmt)
{
	struct device_node *bitclkmaster = NULL;
	struct device_node *framemaster = NULL;
	unsigned int daifmt;

	daifmt = snd_soc_daifmt_parse_format(node, prefix);

	snd_soc_daifmt_parse_clock_provider_as_phandle(node, prefix, &bitclkmaster, &framemaster);
	if (!bitclkmaster && !framemaster) {
		/*
		 * No dai-link level and master setting was not found from
		 * sound node level, revert back to legacy DT parsing and
		 * take the settings from codec node.
		 */
		dev_dbg(dev, "Revert to legacy daifmt parsing\n");

		daifmt |= snd_soc_daifmt_parse_clock_provider_as_flag(codec, NULL);
	} else {
		daifmt |= snd_soc_daifmt_clock_provider_from_bitmap(
				((codec == bitclkmaster)