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// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2019 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/module.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "meson-codec-glue.h"
static struct snd_soc_dapm_widget *
meson_codec_glue_get_input(struct snd_soc_dapm_widget *w)
{
struct snd_soc_dapm_path *p;
struct snd_soc_dapm_widget *in;
snd_soc_dapm_widget_for_each_source_path(w, p) {
if (!p->connect)
continue;
/* Check that we still are in the same component */
if (snd_soc_dapm_to_component(w->dapm) !=
snd_soc_dapm_to_component(p->source->dapm))
continue;
if (p->source->id == snd_soc_dapm_dai_in)
return p->source;
in = meson_codec_glue_get_input(p->source);
if (in)
return in;
}
return NULL;
}
static void meson_codec_glue_input_set_data(struct snd_soc_dai *dai,
struct meson_codec_glue_input *data)
{
snd_soc_dai_dma_data_set_playback(dai, data);
}
struct meson_codec_glue_input *
meson_codec_glue_input_get_data(struct snd_soc_dai *dai)
{
return snd_soc_dai_dma_data_get_playback(dai);
}
EXPORT_SYMBOL_GPL(meson_codec_glue_input_get_data);
static struct meson_codec_glue_input *
meson_codec_glue_output_get_input_data(struct snd_soc_dapm_widget *w)
{
struct snd_soc_dapm_widget *in =
meson_codec_glue_get_input(w);
struct snd_soc_dai *dai;
if (WARN_ON(!in))
return NULL;
dai = in->priv;
return meson_codec_glue_input_get_data(dai);
}
int meson_codec_glue_input_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct meson_codec_glue_input *data =
meson_codec_glue_input_get_data(dai);
data->params.rates = snd_pcm_rate_to_rate_bit(params_rate(params));
data->params.rate_min = params_rate(params);
data->params.rate_max = params_rate(params);
data->params.formats = 1ULL << (__force int) params_format(params);
data->params.channels_min = params_channels(params);
data->params.channels_max = params_channels(params);
data->params.sig_bits = dai->driver->playback.sig_bits;
return 0;
}
EXPORT_SYMBOL_GPL(meson_codec_glue_input_hw_params);
int meson_codec_glue_input_set_fmt(struct snd_soc_dai *dai,
unsigned int fmt)
{
struct meson_codec_glue_input *data =
meson_codec_glue_input_get_data(dai);
/* Save the source stream format for the downstream link */
data->fmt = fmt;
return 0;
}
EXPORT_SYMBOL_GPL(meson_codec_glue_input_set_fmt);
int meson_codec_glue_output_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_dapm_widget *w = snd_soc_dai_get_widget_capture(dai);
struct meson_codec_glue_input *in_data = meson_codec_glue_output_get_input_data(w);
if (!in_data)
return -ENODEV;
if (WARN_ON(!rtd->dai_link->c2c_params)) {
dev_warn(dai->dev, "codec2codec link expected\n");
return -EINVAL;
}
/* Replace link params with the input params */
rtd->dai_link->c2c_params = &in_data->params;
rtd->dai_link->num_c2c_params = 1;
return snd_soc_runtime_set_dai_fmt(rtd, in_data->fmt);
}
EXPORT_SYMBOL_GPL(meson_codec_glue_output_startup);
int meson_codec_glue_input_dai_probe(struct snd_soc_dai *dai)
{
struct meson_codec_glue_input *data;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
meson_codec_glue_input_set_data(dai, data);
return 0;
}
EXPORT_SYMBOL_GPL(meson_codec_glue_input_dai_probe);
int meson_codec_glue_input_dai_remove(struct snd_soc_dai *dai)
{
struct meson_codec_glue_input *data =
meson_codec_glue_input_get_data(dai);
kfree(data);
return 0;
}
EXPORT_SYMBOL_GPL(meson_codec_glue_input_dai_remove);
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
MODULE_DESCRIPTION("Amlogic Codec Glue Helpers");
MODULE_LICENSE("GPL v2");
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