ASoC: SOF: Add widget_kcontrol_setup control ops for IPC3

Define and set the widget_kcontrol_setup control IPC ops for IPC3.

The widget_kcontrol_setup callback can be used to set up all
kcontrols associated with the swidget.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20220405172708.122168-14-ranjani.sridharan@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/ipc3-control.c

@@ -578,6 +578,43 @@ static void sof_ipc3_control_update(struct snd_sof_dev *sdev, void *ipc_control_
 	snd_ctl_notify_one(swidget->scomp->card->snd_card, SNDRV_CTL_EVENT_MASK_VALUE, kc, 0);
 }
 
+static int sof_ipc3_widget_kcontrol_setup(struct snd_sof_dev *sdev,
+					  struct snd_sof_widget *swidget)
+{
+	struct snd_sof_control *scontrol;
+	int ret;
+
+	/* set up all controls for the widget */
+	list_for_each_entry(scontrol, &sdev->kcontrol_list, list)
+		if (scontrol->comp_id == swidget->comp_id) {
+			/* set kcontrol data in DSP */
+			ret = snd_sof_ipc_set_get_comp_data(scontrol, true);
+			if (ret < 0) {
+				dev_err(sdev->dev,
+					"kcontrol %d set up failed for widget %s\n",
+					scontrol->comp_id, swidget->widget->name);
+				return ret;
+			}
+
+			/*
+			 * Read back the data from the DSP for static widgets.
+			 * This is particularly useful for binary kcontrols
+			 * associated with static pipeline widgets to initialize
+			 * the data size to match that in the DSP.
+			 */
+			if (swidget->dynamic_pipeline_widget)
+				continue;
+
+			ret = snd_sof_ipc_set_get_comp_data(scontrol, false);
+			if (ret < 0)
+				dev_warn(sdev->dev,
+					 "kcontrol %d read failed for widget %s\n",
+					 scontrol->comp_id, swidget->widget->name);
+		}
+
+	return 0;
+}
+
 const struct sof_ipc_tplg_control_ops tplg_ipc3_control_ops = {
 	.volume_put = sof_ipc3_volume_put,
 	.volume_get = sof_ipc3_volume_get,
@@ -591,4 +628,5 @@ const struct sof_ipc_tplg_control_ops tplg_ipc3_control_ops = {
 	.bytes_ext_get = sof_ipc3_bytes_ext_get,
 	.bytes_ext_volatile_get = sof_ipc3_bytes_ext_volatile_get,
 	.update = sof_ipc3_control_update,
+	.widget_kcontrol_setup = sof_ipc3_widget_kcontrol_setup,
 };

sound/soc/sof/sof-audio.h

@@ -86,6 +86,8 @@ struct sof_ipc_tplg_control_ops {
 			     const unsigned int __user *binary_data, unsigned int size);
 	/* update control data based on notification from the DSP */
 	void (*update)(struct snd_sof_dev *sdev, void *ipc_control_message);
+	/* Optional callback to setup kcontrols associated with an swidget */
+	int (*widget_kcontrol_setup)(struct snd_sof_dev *sdev, struct snd_sof_widget *swidget);
 };
 
 /**