From: Mengdong Lin mengdong.lin@linux.intel.com
Define API snd_soc_register_dai() to add a DAI dynamically and create the DAI widgets. Topology can use this API to register DAIs when probing a component with topology info. These DAIs's playback & capture widgets will be freed when the sound card is unregistered and the DAIs will be freed when cleaning up the component.
And a dobj is embedded into the struct snd_soc_dai_driver. Topology can use the dobj to find the DAI drivers created by it and free them when the topology component is removed.
Signed-off-by: Mengdong Lin mengdong.lin@linux.intel.com
diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h index 212eaaf..964b7de 100644 --- a/include/sound/soc-dai.h +++ b/include/sound/soc-dai.h @@ -222,6 +222,7 @@ struct snd_soc_dai_driver { const char *name; unsigned int id; unsigned int base; + struct snd_soc_dobj dobj;
/* DAI driver callbacks */ int (*probe)(struct snd_soc_dai *dai); diff --git a/include/sound/soc.h b/include/sound/soc.h index 8436a11..796b757 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1685,6 +1685,9 @@ int snd_soc_add_dai_link(struct snd_soc_card *card, void snd_soc_remove_dai_link(struct snd_soc_card *card, struct snd_soc_dai_link *dai_link);
+int snd_soc_register_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 bfd2424..be1e692 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -2861,6 +2861,48 @@ err: return ret; }
+/** + * snd_soc_register_dai - Register a DAI dynamically & create its widgets + * + * @component: The component the DAIs are registered for + * @dai_drv: DAI driver to use for the DAI + * + * Topology can use this API to register DAIs when probing a component. + * These DAIs's widgets will be freed in the card cleanup and the DAIs + * will be freed in the component cleanup. + */ +int snd_soc_register_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; + + if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) { + dev_err(component->dev, "Invalid dai type %d\n", + dai_drv->dobj.type); + return -EINVAL; + } + + lockdep_assert_held(&client_mutex); + dai = soc_add_dai(component, dai_drv, false); + if (!dai) + return -ENOMEM; + + /* Create the DAI widgets here. After adding DAIs, topology may + * also add routes that need these widgets as source or sink. + */ + 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_register_dai); + static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm, enum snd_soc_dapm_type type, int subseq) {