[RFC PATCH v2 0/2] Enable using multiple kcontrol types in a widget

[RFC PATCH v2 0/2] Enable using multiple kcontrol types in a widget

[Jaska Uimonen]

Hi,

I'm requesting comments to this small series to enable multiple
different kcontrol types for a single widget.

Currently asoc allows to define and parse multiple same type kcontrols
for single widget. So you can have for example two volume controls in a
widget but not for example one byte and one enum control. I personally
had this kind of use case where I wanted to set filter coefficients with
bytes and something else with an enum in one processing widget.

I don't have that good perspective on the asoc history on this part so I
don't know is there some reason for the existing logic or is it just ok
to change it like in this series. I've been told some drivers use
virtual widget for this kind of situation, so they define two widget's
(one virtual) with separate controls, but in reality bind the controls
into the same component in lower level. Or can we just actually use
separate types in one widget?

First patch is changing the kcontrol_type uint in dapm widget to a
pointer to hold an array of kcontrol types and then creating these
different types in a loop in dapm widget load. Second patch is me
utilizing this in sof driver.

Changes since v1:
- don't add kcontrol type to core i.e. to kcontrol and kcontrol_news
- extend existing dapm widget kcontrol_type into holding an array of
  types

Jaska Uimonen (2):
  ASoC: soc-dapm: enable use of multiple control types
  ASoC: SOF: topology: use individual kcontrol types

 include/sound/soc-topology.h |   2 +-
 sound/soc/soc-topology.c     | 466 +++++++++++++++++------------------
 sound/soc/sof/topology.c     |  13 +-
 3 files changed, 232 insertions(+), 249 deletions(-)

-- 
2.24.1

[RFC PATCH v2 1/2] ASoC: soc-dapm: enable use of multiple control types

[Jaska Uimonen]

Current dapm widget has a single variable to describe its kcontrols'
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.

Signed-off-by: Jaska Uimonen <jaska.uimonen@linux.intel.com>
---
 include/sound/soc-topology.h |   2 +-
 sound/soc/soc-topology.c     | 466 +++++++++++++++++------------------
 2 files changed, 224 insertions(+), 244 deletions(-)

diff --git a/include/sound/soc-topology.h b/include/sound/soc-topology.h
index 328cf763d9b4..4afd667e124c 100644
--- a/include/sound/soc-topology.h
+++ b/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 */
diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index eb2633dd6454..3d62fee316b7 100644
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -1194,249 +1194,216 @@ static int soc_tplg_dapm_graph_elems_load(struct soc_tplg *tplg,
 	return ret;
 }
 
-static struct snd_kcontrol_new *soc_tplg_dapm_widget_dmixer_create(
-	struct soc_tplg *tplg, int num_kcontrols)
+static int soc_tplg_dapm_widget_dmixer_create(struct soc_tplg *tplg, struct snd_kcontrol_new *kc)
 {
-	struct snd_kcontrol_new *kc;
 	struct soc_mixer_control *sm;
 	struct snd_soc_tplg_mixer_control *mc;
-	int i, err;
-
-	kc = devm_kcalloc(tplg->dev, num_kcontrols, sizeof(*kc), GFP_KERNEL);
-	if (kc == NULL)
-		return NULL;
-
-	for (i = 0; i < num_kcontrols; i++) {
-		mc = (struct snd_soc_tplg_mixer_control *)tplg->pos;
-
-		/* validate kcontrol */
-		if (strnlen(mc->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
-			SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
-			goto err_sm;
+	int err;
 
-		sm = devm_kzalloc(tplg->dev, sizeof(*sm), GFP_KERNEL);
-		if (sm == NULL)
-			goto err_sm;
+	mc = (struct snd_soc_tplg_mixer_control *)tplg->pos;
 
-		tplg->pos += (sizeof(struct snd_soc_tplg_mixer_control) +
-			      le32_to_cpu(mc->priv.size));
+	/* validate kcontrol */
+	if (strnlen(mc->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
+	    SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
+		return -EINVAL;
 
-		dev_dbg(tplg->dev, " adding DAPM widget mixer control %s at %d\n",
-			mc->hdr.name, i);
+	sm = devm_kzalloc(tplg->dev, sizeof(*sm), GFP_KERNEL);
+	if (!sm)
+		return -ENOMEM;
 
-		kc[i].private_value = (long)sm;
-		kc[i].name = devm_kstrdup(tplg->dev, mc->hdr.name, GFP_KERNEL);
-		if (kc[i].name == NULL)
-			goto err_sm;
-		kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-		kc[i].access = le32_to_cpu(mc->hdr.access);
+	tplg->pos += sizeof(struct snd_soc_tplg_mixer_control) +
+		le32_to_cpu(mc->priv.size);
 
-		/* we only support FL/FR channel mapping atm */
-		sm->reg = tplc_chan_get_reg(tplg, mc->channel,
-			SNDRV_CHMAP_FL);
-		sm->rreg = tplc_chan_get_reg(tplg, mc->channel,
-			SNDRV_CHMAP_FR);
-		sm->shift = tplc_chan_get_shift(tplg, mc->channel,
-			SNDRV_CHMAP_FL);
-		sm->rshift = tplc_chan_get_shift(tplg, mc->channel,
-			SNDRV_CHMAP_FR);
+	dev_dbg(tplg->dev, " adding DAPM widget mixer control %s\n",
+		mc->hdr.name);
 
-		sm->max = le32_to_cpu(mc->max);
-		sm->min = le32_to_cpu(mc->min);
-		sm->invert = le32_to_cpu(mc->invert);
-		sm->platform_max = le32_to_cpu(mc->platform_max);
-		sm->dobj.index = tplg->index;
-		INIT_LIST_HEAD(&sm->dobj.list);
-
-		/* map io handlers */
-		err = soc_tplg_kcontrol_bind_io(&mc->hdr, &kc[i], tplg);
-		if (err) {
-			soc_control_err(tplg, &mc->hdr, mc->hdr.name);
-			goto err_sm;
-		}
+	kc->private_value = (long)sm;
+	kc->name = devm_kstrdup(tplg->dev, mc->hdr.name, GFP_KERNEL);
+	if (!kc->name)
+		return -ENOMEM;
+	kc->iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+	kc->access = le32_to_cpu(mc->hdr.access);
+
+	/* we only support FL/FR channel mapping atm */
+	sm->reg = tplc_chan_get_reg(tplg, mc->channel,
+				    SNDRV_CHMAP_FL);
+	sm->rreg = tplc_chan_get_reg(tplg, mc->channel,
+				     SNDRV_CHMAP_FR);
+	sm->shift = tplc_chan_get_shift(tplg, mc->channel,
+					SNDRV_CHMAP_FL);
+	sm->rshift = tplc_chan_get_shift(tplg, mc->channel,
+					 SNDRV_CHMAP_FR);
+
+	sm->max = le32_to_cpu(mc->max);
+	sm->min = le32_to_cpu(mc->min);
+	sm->invert = le32_to_cpu(mc->invert);
+	sm->platform_max = le32_to_cpu(mc->platform_max);
+	sm->dobj.index = tplg->index;
+	INIT_LIST_HEAD(&sm->dobj.list);
+
+	/* map io handlers */
+	err = soc_tplg_kcontrol_bind_io(&mc->hdr, kc, tplg);
+	if (err) {
+		soc_control_err(tplg, &mc->hdr, mc->hdr.name);
+		return err;
+	}
 
-		/* create any TLV data */
-		err = soc_tplg_create_tlv(tplg, &kc[i], &mc->hdr);
-		if (err < 0) {
-			dev_err(tplg->dev, "ASoC: failed to create TLV %s\n",
-				mc->hdr.name);
-			goto err_sm;
-		}
+	/* create any TLV data */
+	err = soc_tplg_create_tlv(tplg, kc, &mc->hdr);
+	if (err < 0) {
+		dev_err(tplg->dev, "ASoC: failed to create TLV %s\n",
+			mc->hdr.name);
+		return err;
+	}
 
-		/* pass control to driver for optional further init */
-		err = soc_tplg_init_kcontrol(tplg, &kc[i],
-			(struct snd_soc_tplg_ctl_hdr *)mc);
-		if (err < 0) {
-			dev_err(tplg->dev, "ASoC: failed to init %s\n",
-				mc->hdr.name);
-			goto err_sm;
-		}
+	/* pass control to driver for optional further init */
+	err = soc_tplg_init_kcontrol(tplg, kc,
+				     (struct snd_soc_tplg_ctl_hdr *)mc);
+	if (err < 0) {
+		dev_err(tplg->dev, "ASoC: failed to init %s\n",
+			mc->hdr.name);
+		return err;
 	}
-	return kc;
 
-err_sm:
-	return NULL;
+	return 0;
 }
 
-static struct snd_kcontrol_new *soc_tplg_dapm_widget_denum_create(
-	struct soc_tplg *tplg, int num_kcontrols)
+static int soc_tplg_dapm_widget_denum_create(struct soc_tplg *tplg, struct snd_kcontrol_new *kc)
 {
-	struct snd_kcontrol_new *kc;
 	struct snd_soc_tplg_enum_control *ec;
 	struct soc_enum *se;
-	int i, err;
-
-	kc = devm_kcalloc(tplg->dev, num_kcontrols, sizeof(*kc), GFP_KERNEL);
-	if (kc == NULL)
-		return NULL;
-
-	for (i = 0; i < num_kcontrols; i++) {
-		ec = (struct snd_soc_tplg_enum_control *)tplg->pos;
-		/* validate kcontrol */
-		if (strnlen(ec->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
-			    SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
-			goto err_se;
+	int err;
 
-		se = devm_kzalloc(tplg->dev, sizeof(*se), GFP_KERNEL);
-		if (se == NULL)
-			goto err_se;
+	ec = (struct snd_soc_tplg_enum_control *)tplg->pos;
+	/* validate kcontrol */
+	if (strnlen(ec->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
+	    SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
+		return -EINVAL;
 
-		tplg->pos += (sizeof(struct snd_soc_tplg_enum_control) +
-			      le32_to_cpu(ec->priv.size));
+	se = devm_kzalloc(tplg->dev, sizeof(*se), GFP_KERNEL);
+	if (!se)
+		return -ENOMEM;
 
-		dev_dbg(tplg->dev, " adding DAPM widget enum control %s\n",
-			ec->hdr.name);
+	tplg->pos += (sizeof(struct snd_soc_tplg_enum_control) +
+		      le32_to_cpu(ec->priv.size));
 
-		kc[i].private_value = (long)se;
-		kc[i].name = devm_kstrdup(tplg->dev, ec->hdr.name, GFP_KERNEL);
-		if (kc[i].name == NULL)
-			goto err_se;
-		kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-		kc[i].access = le32_to_cpu(ec->hdr.access);
+	dev_dbg(tplg->dev, " adding DAPM widget enum control %s\n",
+		ec->hdr.name);
 
-		/* we only support FL/FR channel mapping atm */
-		se->reg = tplc_chan_get_reg(tplg, ec->channel, SNDRV_CHMAP_FL);
-		se->shift_l = tplc_chan_get_shift(tplg, ec->channel,
-						  SNDRV_CHMAP_FL);
-		se->shift_r = tplc_chan_get_shift(tplg, ec->channel,
-						  SNDRV_CHMAP_FR);
+	kc->private_value = (long)se;
+	kc->name = devm_kstrdup(tplg->dev, ec->hdr.name, GFP_KERNEL);
+	if (!kc->name)
+		return -ENOMEM;
+	kc->iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+	kc->access = le32_to_cpu(ec->hdr.access);
 
-		se->items = le32_to_cpu(ec->items);
-		se->mask = le32_to_cpu(ec->mask);
-		se->dobj.index = tplg->index;
+	/* we only support FL/FR channel mapping atm */
+	se->reg = tplc_chan_get_reg(tplg, ec->channel, SNDRV_CHMAP_FL);
+	se->shift_l = tplc_chan_get_shift(tplg, ec->channel,
+					  SNDRV_CHMAP_FL);
+	se->shift_r = tplc_chan_get_shift(tplg, ec->channel,
+					  SNDRV_CHMAP_FR);
 
-		switch (le32_to_cpu(ec->hdr.ops.info)) {
-		case SND_SOC_TPLG_CTL_ENUM_VALUE:
-		case SND_SOC_TPLG_DAPM_CTL_ENUM_VALUE:
-			err = soc_tplg_denum_create_values(tplg, se, ec);
-			if (err < 0) {
-				dev_err(tplg->dev, "ASoC: could not create values for %s\n",
-					ec->hdr.name);
-				goto err_se;
-			}
-			fallthrough;
-		case SND_SOC_TPLG_CTL_ENUM:
-		case SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE:
-		case SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT:
-			err = soc_tplg_denum_create_texts(tplg, se, ec);
-			if (err < 0) {
-				dev_err(tplg->dev, "ASoC: could not create texts for %s\n",
-					ec->hdr.name);
-				goto err_se;
-			}
-			break;
-		default:
-			dev_err(tplg->dev, "ASoC: invalid enum control type %d for %s\n",
-				ec->hdr.ops.info, ec->hdr.name);
-			goto err_se;
-		}
+	se->items = le32_to_cpu(ec->items);
+	se->mask = le32_to_cpu(ec->mask);
+	se->dobj.index = tplg->index;
 
-		/* map io handlers */
-		err = soc_tplg_kcontrol_bind_io(&ec->hdr, &kc[i], tplg);
-		if (err) {
-			soc_control_err(tplg, &ec->hdr, ec->hdr.name);
-			goto err_se;
+	switch (le32_to_cpu(ec->hdr.ops.info)) {
+	case SND_SOC_TPLG_CTL_ENUM_VALUE:
+	case SND_SOC_TPLG_DAPM_CTL_ENUM_VALUE:
+		err = soc_tplg_denum_create_values(tplg, se, ec);
+		if (err < 0) {
+			dev_err(tplg->dev, "ASoC: could not create values for %s\n",
+				ec->hdr.name);
+			return err;
 		}
-
-		/* pass control to driver for optional further init */
-		err = soc_tplg_init_kcontrol(tplg, &kc[i],
-			(struct snd_soc_tplg_ctl_hdr *)ec);
+		fallthrough;
+	case SND_SOC_TPLG_CTL_ENUM:
+	case SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE:
+	case SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT:
+		err = soc_tplg_denum_create_texts(tplg, se, ec);
 		if (err < 0) {
-			dev_err(tplg->dev, "ASoC: failed to init %s\n",
+			dev_err(tplg->dev, "ASoC: could not create texts for %s\n",
 				ec->hdr.name);
-			goto err_se;
+			return err;
 		}
+		break;
+	default:
+		dev_err(tplg->dev, "ASoC: invalid enum control type %d for %s\n",
+			ec->hdr.ops.info, ec->hdr.name);
+		return -EINVAL;
 	}
 
-	return kc;
+	/* map io handlers */
+	err = soc_tplg_kcontrol_bind_io(&ec->hdr, kc, tplg);
+	if (err) {
+		soc_control_err(tplg, &ec->hdr, ec->hdr.name);
+		return err;
+	}
 
-err_se:
-	return NULL;
+	/* pass control to driver for optional further init */
+	err = soc_tplg_init_kcontrol(tplg, kc,
+				     (struct snd_soc_tplg_ctl_hdr *)ec);
+	if (err < 0) {
+		dev_err(tplg->dev, "ASoC: failed to init %s\n",
+			ec->hdr.name);
+		return err;
+	}
+
+	return 0;
 }
 
-static struct snd_kcontrol_new *soc_tplg_dapm_widget_dbytes_create(
-	struct soc_tplg *tplg, int num_kcontrols)
+static int soc_tplg_dapm_widget_dbytes_create(struct soc_tplg *tplg, struct snd_kcontrol_new *kc)
 {
 	struct snd_soc_tplg_bytes_control *be;
 	struct soc_bytes_ext *sbe;
-	struct snd_kcontrol_new *kc;
-	int i, err;
-
-	kc = devm_kcalloc(tplg->dev, num_kcontrols, sizeof(*kc), GFP_KERNEL);
-	if (!kc)
-		return NULL;
+	int err;
 
-	for (i = 0; i < num_kcontrols; i++) {
-		be = (struct snd_soc_tplg_bytes_control *)tplg->pos;
+	be = (struct snd_soc_tplg_bytes_control *)tplg->pos;
 
-		/* validate kcontrol */
-		if (strnlen(be->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
-			SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
-			goto err_sbe;
+	/* validate kcontrol */
+	if (strnlen(be->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
+	    SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
+		return -EINVAL;
 
-		sbe = devm_kzalloc(tplg->dev, sizeof(*sbe), GFP_KERNEL);
-		if (sbe == NULL)
-			goto err_sbe;
+	sbe = devm_kzalloc(tplg->dev, sizeof(*sbe), GFP_KERNEL);
+	if (!sbe)
+		return -ENOMEM;
 
-		tplg->pos += (sizeof(struct snd_soc_tplg_bytes_control) +
-			      le32_to_cpu(be->priv.size));
+	tplg->pos += (sizeof(struct snd_soc_tplg_bytes_control) +
+		      le32_to_cpu(be->priv.size));
 
-		dev_dbg(tplg->dev,
-			"ASoC: adding bytes kcontrol %s with access 0x%x\n",
-			be->hdr.name, be->hdr.access);
+	dev_dbg(tplg->dev,
+		"ASoC: adding bytes kcontrol %s with access 0x%x\n",
+		be->hdr.name, be->hdr.access);
 
-		kc[i].private_value = (long)sbe;
-		kc[i].name = devm_kstrdup(tplg->dev, be->hdr.name, GFP_KERNEL);
-		if (kc[i].name == NULL)
-			goto err_sbe;
-		kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-		kc[i].access = le32_to_cpu(be->hdr.access);
+	kc->private_value = (long)sbe;
+	kc->name = devm_kstrdup(tplg->dev, be->hdr.name, GFP_KERNEL);
+	if (!kc->name)
+		return -ENOMEM;
+	kc->iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+	kc->access = le32_to_cpu(be->hdr.access);
 
-		sbe->max = le32_to_cpu(be->max);
-		INIT_LIST_HEAD(&sbe->dobj.list);
+	sbe->max = le32_to_cpu(be->max);
+	INIT_LIST_HEAD(&sbe->dobj.list);
 
-		/* map standard io handlers and check for external handlers */
-		err = soc_tplg_kcontrol_bind_io(&be->hdr, &kc[i], tplg);
-		if (err) {
-			soc_control_err(tplg, &be->hdr, be->hdr.name);
-			goto err_sbe;
-		}
-
-		/* pass control to driver for optional further init */
-		err = soc_tplg_init_kcontrol(tplg, &kc[i],
-			(struct snd_soc_tplg_ctl_hdr *)be);
-		if (err < 0) {
-			dev_err(tplg->dev, "ASoC: failed to init %s\n",
-				be->hdr.name);
-			goto err_sbe;
-		}
+	/* map standard io handlers and check for external handlers */
+	err = soc_tplg_kcontrol_bind_io(&be->hdr, kc, tplg);
+	if (err) {
+		soc_control_err(tplg, &be->hdr, be->hdr.name);
+		return err;
 	}
 
-	return kc;
-
-err_sbe:
+	/* pass control to driver for optional further init */
+	err = soc_tplg_init_kcontrol(tplg, kc,
+				     (struct snd_soc_tplg_ctl_hdr *)be);
+	if (err < 0) {
+		dev_err(tplg->dev, "ASoC: failed to init %s\n",
+			be->hdr.name);
+		return err;
+	}
 
-	return NULL;
+	return 0;
 }
 
 static int soc_tplg_dapm_widget_create(struct soc_tplg *tplg,
@@ -1446,8 +1413,13 @@ static int soc_tplg_dapm_widget_create(struct soc_tplg *tplg,
 	struct snd_soc_dapm_widget template, *widget;
 	struct snd_soc_tplg_ctl_hdr *control_hdr;
 	struct snd_soc_card *card = tplg->comp->card;
-	unsigned int kcontrol_type;
+	unsigned int *kcontrol_type;
+	struct snd_kcontrol_new *kc;
+	int mixer_count = 0;
+	int bytes_count = 0;
+	int enum_count = 0;
 	int ret = 0;
+	int i;
 
 	if (strnlen(w->name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
 		SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
@@ -1490,7 +1462,6 @@ static int soc_tplg_dapm_widget_create(struct soc_tplg *tplg,
 		 le32_to_cpu(w->priv.size));
 
 	if (w->num_kcontrols == 0) {
-		kcontrol_type = 0;
 		template.num_kcontrols = 0;
 		goto widget;
 	}
@@ -1499,57 +1470,65 @@ static int soc_tplg_dapm_widget_create(struct soc_tplg *tplg,
 	dev_dbg(tplg->dev, "ASoC: template %s has %d controls of type %x\n",
 		w->name, w->num_kcontrols, control_hdr->type);
 
-	switch (le32_to_cpu(control_hdr->ops.info)) {
-	case SND_SOC_TPLG_CTL_VOLSW:
-	case SND_SOC_TPLG_CTL_STROBE:
-	case SND_SOC_TPLG_CTL_VOLSW_SX:
-	case SND_SOC_TPLG_CTL_VOLSW_XR_SX:
-	case SND_SOC_TPLG_CTL_RANGE:
-	case SND_SOC_TPLG_DAPM_CTL_VOLSW:
-		kcontrol_type = SND_SOC_TPLG_TYPE_MIXER;  /* volume mixer */
-		template.num_kcontrols = le32_to_cpu(w->num_kcontrols);
-		template.kcontrol_news =
-			soc_tplg_dapm_widget_dmixer_create(tplg,
-			template.num_kcontrols);
-		if (!template.kcontrol_news) {
-			ret = -ENOMEM;
-			goto hdr_err;
-		}
-		break;
-	case SND_SOC_TPLG_CTL_ENUM:
-	case SND_SOC_TPLG_CTL_ENUM_VALUE:
-	case SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE:
-	case SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT:
-	case SND_SOC_TPLG_DAPM_CTL_ENUM_VALUE:
-		kcontrol_type = SND_SOC_TPLG_TYPE_ENUM;	/* enumerated mixer */
-		template.num_kcontrols = le32_to_cpu(w->num_kcontrols);
-		template.kcontrol_news =
-			soc_tplg_dapm_widget_denum_create(tplg,
-			template.num_kcontrols);
-		if (!template.kcontrol_news) {
-			ret = -ENOMEM;
-			goto hdr_err;
-		}
-		break;
-	case SND_SOC_TPLG_CTL_BYTES:
-		kcontrol_type = SND_SOC_TPLG_TYPE_BYTES; /* bytes control */
-		template.num_kcontrols = le32_to_cpu(w->num_kcontrols);
-		template.kcontrol_news =
-			soc_tplg_dapm_widget_dbytes_create(tplg,
-				template.num_kcontrols);
-		if (!template.kcontrol_news) {
-			ret = -ENOMEM;
+	template.num_kcontrols = le32_to_cpu(w->num_kcontrols);
+	kc = devm_kcalloc(tplg->dev, w->num_kcontrols, sizeof(*kc), GFP_KERNEL);
+	if (!kc)
+		goto err;
+
+	kcontrol_type = devm_kcalloc(tplg->dev, w->num_kcontrols, sizeof(unsigned int), GFP_KERNEL);
+	if (!kcontrol_type)
+		goto err;
+
+	for (i = 0; i < w->num_kcontrols; i++) {
+		control_hdr = (struct snd_soc_tplg_ctl_hdr *)tplg->pos;
+		switch (le32_to_cpu(control_hdr->ops.info)) {
+		case SND_SOC_TPLG_CTL_VOLSW:
+		case SND_SOC_TPLG_CTL_STROBE:
+		case SND_SOC_TPLG_CTL_VOLSW_SX:
+		case SND_SOC_TPLG_CTL_VOLSW_XR_SX:
+		case SND_SOC_TPLG_CTL_RANGE:
+		case SND_SOC_TPLG_DAPM_CTL_VOLSW:
+			/* volume mixer */
+			kc[i].index = mixer_count;
+			kcontrol_type[i] = SND_SOC_TPLG_TYPE_MIXER;
+			mixer_count++;
+			ret = soc_tplg_dapm_widget_dmixer_create(tplg, &kc[i]);
+			if (ret < 0)
+				goto hdr_err;
+			break;
+		case SND_SOC_TPLG_CTL_ENUM:
+		case SND_SOC_TPLG_CTL_ENUM_VALUE:
+		case SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE:
+		case SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT:
+		case SND_SOC_TPLG_DAPM_CTL_ENUM_VALUE:
+			/* enumerated mixer */
+			kc[i].index = enum_count;
+			kcontrol_type[i] = SND_SOC_TPLG_TYPE_ENUM;
+			enum_count++;
+			ret = soc_tplg_dapm_widget_denum_create(tplg, &kc[i]);
+			if (ret < 0)
+				goto hdr_err;
+			break;
+		case SND_SOC_TPLG_CTL_BYTES:
+			/* bytes control */
+			kc[i].index = bytes_count;
+			kcontrol_type[i] = SND_SOC_TPLG_TYPE_BYTES;
+			bytes_count++;
+			ret = soc_tplg_dapm_widget_dbytes_create(tplg, &kc[i]);
+			if (ret < 0)
+				goto hdr_err;
+			break;
+		default:
+			dev_err(tplg->dev, "ASoC: invalid widget control type %d:%d:%d\n",
+				control_hdr->ops.get, control_hdr->ops.put,
+				le32_to_cpu(control_hdr->ops.info));
+			ret = -EINVAL;
 			goto hdr_err;
 		}
-		break;
-	default:
-		dev_err(tplg->dev, "ASoC: invalid widget control type %d:%d:%d\n",
-			control_hdr->ops.get, control_hdr->ops.put,
-			le32_to_cpu(control_hdr->ops.info));
-		ret = -EINVAL;
-		goto hdr_err;
 	}
 
+	template.kcontrol_news = kc;
+
 widget:
 	ret = soc_tplg_widget_load(tplg, &template, w);
 	if (ret < 0)
@@ -1586,6 +1565,7 @@ static int soc_tplg_dapm_widget_create(struct soc_tplg *tplg,
 	snd_soc_dapm_free_widget(widget);
 hdr_err:
 	kfree(template.sname);
+	kfree(kc);
 err:
 	kfree(template.name);
 	return ret;
-- 
2.24.1

[RFC PATCH v2 2/2] ASoC: SOF: topology: use individual kcontrol types

[Jaska Uimonen]

Change control creation and deletion to use individual kcontrol types.
This enables the use of multiple different type of controls in single
widget.

Signed-off-by: Jaska Uimonen <jaska.uimonen@linux.intel.com>
---
 sound/soc/sof/topology.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c
index 2c9581c6b92d..fbe7b7c9fb67 100644
--- a/sound/soc/sof/topology.c
+++ b/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;
@@ -2148,7 +2150,7 @@ static int sof_get_control_data(struct snd_soc_component *scomp,
 			break;
 		default:
 			dev_err(scomp->dev, "error: unknown kcontrol type %d in widget %s\n",
-				widget->dobj.widget.kcontrol_type,
+				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;
-- 
2.24.1