[PATCH v3 5/9] ASoC: soc-core: Add snd_soc_of_xlate_dai_name() generic helper

[Harendra Gautam <harendra.gautam@oss.qualcomm.com>]

Add snd_soc_of_xlate_dai_name() to soc-core.c as a generic helper
that can be assigned directly to the .of_xlate_dai_name component
driver callback. It iterates the component's DAI list using
for_each_component_dais() and matches by DAI ID.

Use the helper in lpass-cpu.c and qaif-cpu.c, and remove the local
lpass implementation.

Signed-off-by: Harendra Gautam <harendra.gautam@oss.qualcomm.com>
---
 include/sound/soc.h        |  3 +++
 sound/soc/qcom/lpass-cpu.c | 23 +----------------------
 sound/soc/qcom/qaif-cpu.c  |  1 +
 sound/soc/soc-core.c       | 33 +++++++++++++++++++++++++++++++++
 4 files changed, 38 insertions(+), 22 deletions(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 10ad80f930c2..9d2b16a7ac2d 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1329,6 +1329,9 @@ int snd_soc_of_parse_tdm_slot(struct device_node *np,
 			      unsigned int *rx_mask,
 			      unsigned int *slots,
 			      unsigned int *slot_width);
+int snd_soc_of_xlate_dai_name(struct snd_soc_component *component,
+			      const struct of_phandle_args *args,
+			      const char **dai_name);
 void snd_soc_of_parse_node_prefix(struct device_node *np,
 				   struct snd_soc_codec_conf *codec_conf,
 				   struct device_node *of_node,
diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index 242bc16da36d..61efa45376cd 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -458,30 +458,9 @@ const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops2 = {
 };
 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_ops2);
 
-static int asoc_qcom_of_xlate_dai_name(struct snd_soc_component *component,
-				   const struct of_phandle_args *args,
-				   const char **dai_name)
-{
-	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
-	const struct lpass_variant *variant = drvdata->variant;
-	int id = args->args[0];
-	int ret = -EINVAL;
-	int i;
-
-	for (i = 0; i  < variant->num_dai; i++) {
-		if (variant->dai_driver[i].id == id) {
-			*dai_name = variant->dai_driver[i].name;
-			ret = 0;
-			break;
-		}
-	}
-
-	return ret;
-}
-
 static const struct snd_soc_component_driver lpass_cpu_comp_driver = {
 	.name = "lpass-cpu",
-	.of_xlate_dai_name = asoc_qcom_of_xlate_dai_name,
+	.of_xlate_dai_name = snd_soc_of_xlate_dai_name,
 	.legacy_dai_naming = 1,
 };
 
diff --git a/sound/soc/qcom/qaif-cpu.c b/sound/soc/qcom/qaif-cpu.c
index 8792d01254a6..384562dbd56a 100644
--- a/sound/soc/qcom/qaif-cpu.c
+++ b/sound/soc/qcom/qaif-cpu.c
@@ -596,6 +596,7 @@ EXPORT_SYMBOL_GPL(asoc_qcom_qaif_aif_cpu_dai_ops);
 
 static const struct snd_soc_component_driver qaif_cpu_comp_driver = {
 	.name = "qaif-cpu",
+	.of_xlate_dai_name = snd_soc_of_xlate_dai_name,
 };
 
 static const struct regmap_config audio_qaif_regmap_config = {
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 7817beea5b3b..4b3efcd56b37 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3040,6 +3040,39 @@ int snd_soc_of_parse_tdm_slot(struct device_node *np,
 }
 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
 
+/**
+ * snd_soc_of_xlate_dai_name - Resolve a sound-dai phandle argument to a
+ *                             DAI name by searching the component DAI list.
+ * @component: ASoC component to search.
+ * @args:      Phandle arguments from the sound-dai property; args[0] is the
+ *             DAI ID.
+ * @dai_name:  Output pointer set to the matched DAI name on success.
+ *
+ * Return: 0 on success, -EINVAL if args_count != 1 or no match is found.
+ */
+int snd_soc_of_xlate_dai_name(struct snd_soc_component *component,
+			      const struct of_phandle_args *args,
+			      const char **dai_name)
+{
+	struct snd_soc_dai *dai;
+	int id;
+
+	if (args->args_count != 1)
+		return -EINVAL;
+
+	id = args->args[0];
+
+	for_each_component_dais(component, dai) {
+		if (dai->driver->id == id) {
+			*dai_name = snd_soc_dai_name_get(dai);
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_xlate_dai_name);
+
 void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
 				     struct snd_soc_dai_link_component *cpus)
 {
-- 
2.34.1