Quelle  hda-dai.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
//
// Copyright(c) 2021-2022 Intel Corporation
//
// Author: Cezary Rojewski <cezary.rojewski@intel.com>
//

#include <sound/soc.h>
#include <sound/hda_codec.h>
#include "hda.h"

static int hda_codec_dai_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
{
 struct hda_pcm_stream *stream_info;
 struct hda_codec *codec;
 struct hda_pcm *pcm;
 int ret;

 codec = dev_to_hda_codec(dai->dev);
 stream_info = snd_soc_dai_get_dma_data(dai, substream);
 pcm = container_of(stream_info, struct hda_pcm, stream[substream->stream]);

 dev_dbg(dai->dev, "open stream codec: %08x, info: %p, pcm: %p %s substream: %p\n",
  codec->core.vendor_id, stream_info, pcm, pcm->name, substream);

 snd_hda_codec_pcm_get(pcm);

 ret = stream_info->ops.open(stream_info, codec, substream);
 if (ret < 0) {
  dev_err(dai->dev, "codec open failed: %d\n", ret);
  snd_hda_codec_pcm_put(pcm);
  return ret;
 }

 return 0;
}

static void hda_codec_dai_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
{
 struct hda_pcm_stream *stream_info;
 struct hda_codec *codec;
 struct hda_pcm *pcm;
 int ret;

 codec = dev_to_hda_codec(dai->dev);
 stream_info = snd_soc_dai_get_dma_data(dai, substream);
 pcm = container_of(stream_info, struct hda_pcm, stream[substream->stream]);

 dev_dbg(dai->dev, "close stream codec: %08x, info: %p, pcm: %p %s substream: %p\n",
  codec->core.vendor_id, stream_info, pcm, pcm->name, substream);

 ret = stream_info->ops.close(stream_info, codec, substream);
 if (ret < 0)
  dev_err(dai->dev, "codec close failed: %d\n", ret);

 snd_hda_codec_pcm_put(pcm);
}

static int hda_codec_dai_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
{
 struct hda_pcm_stream *stream_info;
 struct hda_codec *codec;

 codec = dev_to_hda_codec(dai->dev);
 stream_info = snd_soc_dai_get_dma_data(dai, substream);

 snd_hda_codec_cleanup(codec, stream_info, substream);

 return 0;
}

static int hda_codec_dai_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
{
 struct snd_pcm_runtime *runtime = substream->runtime;
 struct hda_pcm_stream *stream_info;
 struct hdac_stream *stream;
 struct hda_codec *codec;
 unsigned int format;
 unsigned int bits;
 int ret;

 codec = dev_to_hda_codec(dai->dev);
 stream = substream->runtime->private_data;
 stream_info = snd_soc_dai_get_dma_data(dai, substream);

 bits = snd_hdac_stream_format_bits(runtime->format, runtime->subformat,
        stream_info->maxbps);
 format = snd_hdac_stream_format(runtime->channels, bits, runtime->rate);

 ret = snd_hda_codec_prepare(codec, stream_info, stream->stream_tag, format, substream);
 if (ret < 0) {
  dev_err(dai->dev, "codec prepare failed: %d\n", ret);
  return ret;
 }

 return 0;
}

const struct snd_soc_dai_ops snd_soc_hda_codec_dai_ops = {
 .startup = hda_codec_dai_startup,
 .shutdown = hda_codec_dai_shutdown,
 .hw_free = hda_codec_dai_hw_free,
 .prepare = hda_codec_dai_prepare,
};
EXPORT_SYMBOL_GPL(snd_soc_hda_codec_dai_ops);