ASoC: topology: Add support for multiple kcontrol types to a widget

Current dapm widget has a single variable to describe its kcontrol's
type. As there can be many kcontrols in one widget it is inherently
presumed that the types are the same.

Lately there has been use cases where different types of kcontrols would
be needed for a single widget. Thus add pointer to dapm widget to hold
an array for different kcontrol types and modify the kcontrol creation
to operate in a loop based on individual kcontrol type.

Change control creation and deletion to use individual kcontrol types in
SOF driver. This is done in the same patch for not breaking bisect. SOF
driver is also currently the only one using the dapm widget
kcontrol_type.
Signed-off-by: Jaska Uimonen <jaska.uimonen@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20210507070246.404446-1-jaska.uimonen@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-topology.h

@@ -54,7 +54,7 @@ struct snd_soc_dobj_control {
 
 /* dynamic widget object */
 struct snd_soc_dobj_widget {
-	unsigned int kcontrol_type;	/* kcontrol type: mixer, enum, bytes */
+	unsigned int *kcontrol_type;	/* kcontrol type: mixer, enum, bytes */
 };
 
 /* generic dynamic object - all dynamic objects belong to this struct */

sound/soc/sof/topology.c

@@ -1063,6 +1063,7 @@ static int sof_control_load_volume(struct snd_soc_component *scomp,
 	scontrol->min_volume_step = le32_to_cpu(mc->min);
 	scontrol->max_volume_step = le32_to_cpu(mc->max);
 	scontrol->num_channels = le32_to_cpu(mc->num_channels);
+	scontrol->control_data->index = kc->index;
 
 	/* set cmd for mixer control */
 	if (le32_to_cpu(mc->max) == 1) {
@@ -1140,7 +1141,7 @@ static int sof_control_load_enum(struct snd_soc_component *scomp,
 
 	scontrol->comp_id = sdev->next_comp_id;
 	scontrol->num_channels = le32_to_cpu(ec->num_channels);
-
+	scontrol->control_data->index = kc->index;
 	scontrol->cmd = SOF_CTRL_CMD_ENUM;
 
 	dev_dbg(scomp->dev, "tplg: load kcontrol index %d chans %d comp_id %d\n",
@@ -1188,6 +1189,7 @@ static int sof_control_load_bytes(struct snd_soc_component *scomp,
 
 	scontrol->comp_id = sdev->next_comp_id;
 	scontrol->cmd = SOF_CTRL_CMD_BINARY;
+	scontrol->control_data->index = kc->index;
 
 	dev_dbg(scomp->dev, "tplg: load kcontrol index %d chans %d\n",
 		scontrol->comp_id, scontrol->num_channels);
@@ -2133,7 +2135,7 @@ static int sof_get_control_data(struct snd_soc_component *scomp,
 	for (i = 0; i < widget->num_kcontrols; i++) {
 		kc = &widget->kcontrol_news[i];
 
-		switch (widget->dobj.widget.kcontrol_type) {
+		switch (widget->dobj.widget.kcontrol_type[i]) {
 		case SND_SOC_TPLG_TYPE_MIXER:
 			sm = (struct soc_mixer_control *)kc->private_value;
 			wdata[i].control = sm->dobj.private;
@@ -2147,8 +2149,8 @@ static int sof_get_control_data(struct snd_soc_component *scomp,
 			wdata[i].control = se->dobj.private;
 			break;
 		default:
-			dev_err(scomp->dev, "error: unknown kcontrol type %d in widget %s\n",
-				widget->dobj.widget.kcontrol_type,
+			dev_err(scomp->dev, "error: unknown kcontrol type %u in widget %s\n",
+				widget->dobj.widget.kcontrol_type[i],
 				widget->name);
 			return -EINVAL;
 		}
@@ -2164,7 +2166,8 @@ static int sof_get_control_data(struct snd_soc_component *scomp,
 			return -EINVAL;
 
 		/* make sure data is valid - data can be updated at runtime */
-		if (wdata[i].pdata->magic != SOF_ABI_MAGIC)
+		if (widget->dobj.widget.kcontrol_type[i] == SND_SOC_TPLG_TYPE_BYTES &&
+		    wdata[i].pdata->magic != SOF_ABI_MAGIC)
 			return -EINVAL;
 
 		*size += wdata[i].pdata->size;
@@ -2605,7 +2608,7 @@ static int sof_widget_unload(struct snd_soc_component *scomp,
 	}
 	for (i = 0; i < widget->num_kcontrols; i++) {
 		kc = &widget->kcontrol_news[i];
-		switch (dobj->widget.kcontrol_type) {
+		switch (widget->dobj.widget.kcontrol_type[i]) {
 		case SND_SOC_TPLG_TYPE_MIXER:
 			sm = (struct soc_mixer_control *)kc->private_value;
 			scontrol = sm->dobj.private;