参照元†
- struct device *dev
- const struct snd_soc_codec_driver *codec_drv
- struct snd_soc_dai_driver *dai_drv
- int num_dai
返り値†
/**
* snd_soc_register_codec - Register a codec with the ASoC core
*
* @dev: The parent device for this codec
* @codec_drv: Codec driver
* @dai_drv: The associated DAI driver
* @num_dai: Number of DAIs
*/
int snd_soc_register_codec(struct device *dev,
const struct snd_soc_codec_driver *codec_drv,
struct snd_soc_dai_driver *dai_drv,
int num_dai)
{
struct snd_soc_dapm_context *dapm;
struct snd_soc_codec *codec;
struct snd_soc_dai *dai;
int ret, i;
dev_dbg(dev, "codec register %s\n", dev_name(dev));
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
if (codec == NULL)
return -ENOMEM;
codec->component.codec = codec;
ret = snd_soc_component_initialize(&codec->component,
&codec_drv->component_driver, dev);
if (ret)
goto err_free;
if (codec_drv->controls) {
codec->component.controls = codec_drv->controls;
codec->component.num_controls = codec_drv->num_controls;
}
if (codec_drv->dapm_widgets) {
codec->component.dapm_widgets = codec_drv->dapm_widgets;
codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
}
if (codec_drv->dapm_routes) {
codec->component.dapm_routes = codec_drv->dapm_routes;
codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
}
- controls, dapm_widgets, dapm_routes の 3つのメンバは、
struct snd_soc_codec_driver と struct snd_soc_component_driver の両方に存在する。
恐らく codec_driver から component_driver に移動させている途中なのだと思われる。
- codec_driver は component_driver を内包しているので、
codec_driver 側のメンバは完全に要らない子になる。
(Linux 4.4.1 では存在するが、将来のバージョンでは codec_driver 側のメンバは削除されているようだ)
if (codec_drv->probe)
codec->component.probe = snd_soc_codec_drv_probe;
if (codec_drv->remove)
codec->component.remove = snd_soc_codec_drv_remove;
if (codec_drv->write)
codec->component.write = snd_soc_codec_drv_write;
if (codec_drv->read)
codec->component.read = snd_soc_codec_drv_read;
codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
dapm = snd_soc_codec_get_dapm(codec);
dapm->idle_bias_off = codec_drv->idle_bias_off;
dapm->suspend_bias_off = codec_drv->suspend_bias_off;
if (codec_drv->seq_notifier)
dapm->seq_notifier = codec_drv->seq_notifier;
if (codec_drv->set_bias_level)
dapm->set_bias_level = snd_soc_codec_set_bias_level;
codec->dev = dev;
codec->driver = codec_drv;
codec->component.val_bytes = codec_drv->reg_word_size;
#ifdef CONFIG_DEBUG_FS
codec->component.init_debugfs = soc_init_codec_debugfs;
codec->component.debugfs_prefix = "codec";
#endif
if (codec_drv->get_regmap)
codec->component.regmap = codec_drv->get_regmap(dev);
for (i = 0; i < num_dai; i++) {
fixup_codec_formats(&dai_drv[i].playback);
fixup_codec_formats(&dai_drv[i].capture);
}
ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
if (ret < 0) {
dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
goto err_cleanup;
}
list_for_each_entry(dai, &codec->component.dai_list, list)
dai->codec = codec;
mutex_lock(&client_mutex);
snd_soc_component_add_unlocked(&codec->component);
list_add(&codec->list, &codec_list);
mutex_unlock(&client_mutex);
dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
codec->component.name);
return 0;
err_cleanup:
snd_soc_component_cleanup(&codec->component);
err_free:
kfree(codec);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);
コメント†