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>
---
 sound/soc/codecs/wm_adsp.c | 11 +++++++++++
 sound/soc/codecs/wm_adsp.h |  1 +
 2 files changed, 12 insertions(+)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 68e00970b8a2..79695ead5788 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/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)
 {
diff --git a/sound/soc/codecs/wm_adsp.h b/sound/soc/codecs/wm_adsp.h
index 599be409b669..b4d5bd321c0b 100644
--- a/sound/soc/codecs/wm_adsp.h
+++ b/sound/soc/codecs/wm_adsp.h
@@ -144,6 +144,7 @@ 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,
-- 
2.47.3