--- zzzz-none-000/linux-4.4.271/sound/soc/soc-core.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/sound/soc/soc-core.c	2023-04-19 10:22:30.000000000 +0000
@@ -861,11 +861,27 @@
 static const struct snd_soc_dai_ops null_dai_ops = {
 };
 
-static struct snd_soc_component *soc_find_component(
+/**
+ * soc_find_component: find a component from component_list in ASoC core
+ *
+ * @of_node: of_node of the component to query.
+ * @name: name of the component to query.
+ *
+ * function to find out if a component is already registered with ASoC core.
+ *
+ * Returns component handle for success, else NULL error.
+ */
+struct snd_soc_component *soc_find_component(
 	const struct device_node *of_node, const char *name)
 {
 	struct snd_soc_component *component;
 
+	if (!of_node && !name) {
+		pr_err("%s: Either of_node or name must be valid\n",
+			__func__);
+		return NULL;
+	}
+
 	lockdep_assert_held(&client_mutex);
 
 	list_for_each_entry(component, &component_list, list) {
@@ -879,6 +895,7 @@
 
 	return NULL;
 }
+EXPORT_SYMBOL(soc_find_component);
 
 static struct snd_soc_dai *snd_soc_find_dai(
 	const struct snd_soc_dai_link_component *dlc)
@@ -3041,6 +3058,18 @@
 }
 
 /**
+ * snd_soc_card_change_online_state - Mark if soc card is online/offline
+ *
+ * @soc_card : soc_card to mark
+ */
+void snd_soc_card_change_online_state(struct snd_soc_card *soc_card, int online)
+{
+	if (soc_card && soc_card->snd_card)
+		snd_card_change_online_state(soc_card->snd_card, online);
+}
+EXPORT_SYMBOL(snd_soc_card_change_online_state);
+
+/**
  * snd_soc_register_codec - Register a codec with the ASoC core
  *
  * @dev: The parent device for this codec
@@ -3589,6 +3618,63 @@
 	return ret;
 }
 
+/**
+ * snd_soc_info_multi_ext - external single mixer info callback
+ * @kcontrol: mixer control
+ * @uinfo: control element information
+ *
+ * Callback to provide information about a single external mixer control.
+ * that accepts multiple input.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_info_multi_ext(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_info *uinfo)
+{
+	struct soc_multi_mixer_control *mc =
+		(struct soc_multi_mixer_control *)kcontrol->private_value;
+	int platform_max;
+
+	if (!mc->platform_max)
+		mc->platform_max = mc->max;
+	platform_max = mc->platform_max;
+
+	if (platform_max == 1 && !strnstr(kcontrol->id.name, " Volume", 30))
+		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	else
+		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+
+	uinfo->count = mc->count;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = platform_max;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_info_multi_ext);
+
+/**
+ * snd_soc_dai_get_channel_map - configure DAI audio channel map
+ * @dai: DAI
+ * @tx_num: how many TX channels
+ * @tx_slot: pointer to an array which imply the TX slot number channel
+ *           0~num-1 uses
+ * @rx_num: how many RX channels
+ * @rx_slot: pointer to an array which imply the RX slot number channel
+ *           0~num-1 uses
+ *
+ * configure the relationship between channel number and TDM slot number.
+ */
+int snd_soc_dai_get_channel_map(struct snd_soc_dai *dai,
+	unsigned int *tx_num, unsigned int *tx_slot,
+	unsigned int *rx_num, unsigned int *rx_slot)
+{
+	if (dai->driver && dai->driver->ops->get_channel_map)
+		return dai->driver->ops->get_channel_map(dai, tx_num, tx_slot,
+			rx_num, rx_slot);
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dai_get_channel_map);
+
 int snd_soc_of_get_dai_name(struct device_node *of_node,
 			    const char **dai_name)
 {