From: Mengdong Lin mengdong.lin@linux.intel.com
API snd_soc_add_dai() is defined to register a DAI dynamically and create its DAI widget. This API can be used by the topology core to add DAIs.
Signed-off-by: Mengdong Lin mengdong.lin@linux.intel.com
diff --git a/include/sound/soc.h b/include/sound/soc.h index 13e1409..a6e6a1b 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1667,6 +1667,9 @@ int snd_soc_of_get_dai_link_codecs(struct device *dev, void snd_soc_add_dai_link(struct snd_soc_card *card, struct snd_soc_dai_link *dai_link);
+int snd_soc_add_dai(struct snd_soc_component *component, + struct snd_soc_dai_driver *dai_drv); + #include <sound/soc-dai.h>
#ifdef CONFIG_DEBUG_FS diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 23d067ae..f4bf26c 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -2786,6 +2786,91 @@ err: return ret; }
+static struct snd_soc_dai *soc_register_dai(struct snd_soc_component *component, + struct snd_soc_dai_driver *dai_drv, + bool legacy_dai_naming) +{ + struct device *dev = component->dev; + struct snd_soc_dai *dai; + int ret; + + dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev)); + + dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL); + if (dai == NULL) { + ret = -ENOMEM; + goto err; + } + + /* + * Back in the old days when we still had component-less DAIs, + * instead of having a static name, component-less DAIs would + * inherit the name of the parent device so it is possible to + * register multiple instances of the DAI. We still need to keep + * the same naming style even though those DAIs are not + * component-less anymore. + */ + if (legacy_dai_naming) { + dai->name = fmt_single_name(dev, &dai->id); + } else { + dai->name = fmt_multiple_name(dev, dai_drv); + if (dai_drv->id) + dai->id = dai_drv->id; + else + dai->id = component->num_dai; + } + if (dai->name == NULL) { + kfree(dai); + ret = -ENOMEM; + goto err; + } + + dai->component = component; + dai->dev = dev; + dai->driver = dai_drv; + if (!dai->driver->ops) + dai->driver->ops = &null_dai_ops; + + list_add(&dai->list, &component->dai_list); + component->num_dai++; + + dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name); + return dai; + +err: + kfree(dai); + return NULL; +} + +/** + * snd_soc_add_dai - Add a DAI dynamically with the ASoC core + * + * @component: The component the DAIs are registered for + * @dai_drv: DAI driver to use for the DAI + */ +int snd_soc_add_dai(struct snd_soc_component *component, + struct snd_soc_dai_driver *dai_drv) +{ + struct snd_soc_dapm_context *dapm = + snd_soc_component_get_dapm(component); + struct snd_soc_dai *dai; + int ret; + + lockdep_assert_held(&client_mutex); + dai = soc_register_dai(component, dai_drv, false); + if (!dai) + return -ENOMEM; + + ret = snd_soc_dapm_new_dai_widgets(dapm, dai); + if (ret != 0) { + dev_err(component->dev, + "Failed to create DAI widgets %d\n", ret); + } + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_add_dai); + static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm, enum snd_soc_dapm_type type, int subseq) {