ASoC: wm_adsp: Add control_add callback and export wm_adsp_control_add()

The callback allows codec drivers to affect how firmware coefficients
are added as controls.

For example a codec driver may selectively add controls by choosing to
call wm_adsp_control_add() based on some filter logic.
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Link: https://patch.msgid.link/20240805102721.30102-2-simont@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm_adsp.c

@@ -583,7 +583,7 @@ static void wm_adsp_ctl_work(struct work_struct *work)
 	kfree(kcontrol);
 }
 
-static int wm_adsp_control_add(struct cs_dsp_coeff_ctl *cs_ctl)
+int wm_adsp_control_add(struct cs_dsp_coeff_ctl *cs_ctl)
 {
 	struct wm_adsp *dsp = container_of(cs_ctl->dsp, struct wm_adsp, cs_dsp);
 	struct cs_dsp *cs_dsp = &dsp->cs_dsp;
@@ -658,6 +658,17 @@ static int wm_adsp_control_add(struct cs_dsp_coeff_ctl *cs_ctl)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(wm_adsp_control_add);
+
+static int wm_adsp_control_add_cb(struct cs_dsp_coeff_ctl *cs_ctl)
+{
+	struct wm_adsp *dsp = container_of(cs_ctl->dsp, struct wm_adsp, cs_dsp);
+
+	if (dsp->control_add)
+		return (dsp->control_add)(dsp, cs_ctl);
+	else
+		return wm_adsp_control_add(cs_ctl);
+}
 
 static void wm_adsp_control_remove(struct cs_dsp_coeff_ctl *cs_ctl)
 {
@@ -2072,12 +2083,12 @@ irqreturn_t wm_halo_wdt_expire(int irq, void *data)
 EXPORT_SYMBOL_GPL(wm_halo_wdt_expire);
 
 static const struct cs_dsp_client_ops wm_adsp1_client_ops = {
-	.control_add = wm_adsp_control_add,
+	.control_add = wm_adsp_control_add_cb,
 	.control_remove = wm_adsp_control_remove,
 };
 
 static const struct cs_dsp_client_ops wm_adsp2_client_ops = {
-	.control_add = wm_adsp_control_add,
+	.control_add = wm_adsp_control_add_cb,
 	.control_remove = wm_adsp_control_remove,
 	.pre_run = wm_adsp_pre_run,
 	.post_run = wm_adsp_event_post_run,

sound/soc/codecs/wm_adsp.h

@@ -37,6 +37,7 @@ struct wm_adsp {
 	bool wmfw_optional;
 
 	struct work_struct boot_work;
+	int (*control_add)(struct wm_adsp *dsp, struct cs_dsp_coeff_ctl *cs_ctl);
 	int (*pre_run)(struct wm_adsp *dsp);
 
 	bool preloaded;
@@ -132,6 +133,8 @@ int wm_adsp_compr_pointer(struct snd_soc_component *component,
 int wm_adsp_compr_copy(struct snd_soc_component *component,
 		       struct snd_compr_stream *stream,
 		       char __user *buf, size_t count);
+
+int wm_adsp_control_add(struct cs_dsp_coeff_ctl *cs_ctl);
 int wm_adsp_write_ctl(struct wm_adsp *dsp, const char *name,  int type,
 		      unsigned int alg, void *buf, size_t len);
 int wm_adsp_read_ctl(struct wm_adsp *dsp, const char *name,  int type,