ASoC: wm_adsp: Export function for KUnit test to get firmware filenames

Export a function that KUnit tests can use to get the firmware filenames
from the wm_adsp_fw[] array.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://patch.msgid.link/20260310141817.1871794-4-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: rfvirgil

sound/soc/codecs/wm_adsp.c

@@ -318,6 +318,17 @@ struct wm_coeff_ctl {
 	struct work_struct work;
 };
 
+#if IS_ENABLED(CONFIG_KUNIT)
+const char *wm_adsp_get_fwf_name_by_index(int index)
+{
+	if (index < ARRAY_SIZE(wm_adsp_fw))
+		return wm_adsp_fw[index].file;
+
+	return NULL;
+}
+EXPORT_SYMBOL_IF_KUNIT(wm_adsp_get_fwf_name_by_index);
+#endif
+
 int wm_adsp_fw_get(struct snd_kcontrol *kcontrol,
 		   struct snd_ctl_elem_value *ucontrol)
 {

sound/soc/codecs/wm_adsp.h

@@ -143,6 +143,7 @@ int wm_adsp_read_ctl(struct wm_adsp *dsp, const char *name,  int type,
 		      unsigned int alg, void *buf, size_t len);
 
 #if IS_ENABLED(CONFIG_KUNIT)
+const char *wm_adsp_get_fwf_name_by_index(int index);
 void wm_adsp_release_firmware_files(const struct firmware *wmfw_firmware,
 				    char *wmfw_filename,
 				    const struct firmware *coeff_firmware,