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