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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 = NULL;
- 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)
- {
- dai->playback_dma_data = data;
- }
- struct meson_codec_glue_input *
- meson_codec_glue_input_get_data(struct snd_soc_dai *dai)
- {
- return dai->playback_dma_data;
- }
- 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 = asoc_substream_to_rtd(substream);
- struct meson_codec_glue_input *in_data =
- meson_codec_glue_output_get_input_data(dai->capture_widget);
- if (!in_data)
- return -ENODEV;
- if (WARN_ON(!rtd->dai_link->params)) {
- dev_warn(dai->dev, "codec2codec link expected\n");
- return -EINVAL;
- }
- /* Replace link params with the input params */
- rtd->dai_link->params = &in_data->params;
- if (!in_data->fmt)
- return 0;
- 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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