ASoC: SOF: topology: simplify kcontrol names with

Merge series from Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>:

The use of the widget name as a prefix for the kcontrol name is quite
useful in the case of multiple pipelines going to the same endpoint,
but it's overkill in simpler cases.

This patchset extends the existing DAPM code to drop the widget name
prefix and make the kcontrol names simpler when there's no possible
ambiguity, e.g.  "gain.2.1 Main Playback Volume" becomes just "Main
Playback Volume".

include/sound/soc-dapm.h

@@ -650,6 +650,7 @@ struct snd_soc_dapm_widget {
 	unsigned char power_checked:1;		/* power checked this run */
 	unsigned char is_supply:1;		/* Widget is a supply type widget */
 	unsigned char is_ep:2;			/* Widget is a endpoint type widget */
+	unsigned char no_wname_in_kcontrol_name:1; /* No widget name prefix in kcontrol name */
 	int subseq;				/* sort within widget type */
 
 	int (*power_check)(struct snd_soc_dapm_widget *w);

include/uapi/sound/sof/tokens.h

@@ -99,7 +99,11 @@
 #define SOF_TKN_COMP_OUTPUT_PIN_BINDING_WNAME	414
 #define SOF_TKN_COMP_NUM_INPUT_AUDIO_FORMATS	415
 #define SOF_TKN_COMP_NUM_OUTPUT_AUDIO_FORMATS	416
-
+/*
+ * The token value is copied to the dapm_widget's
+ * no_wname_in_kcontrol_name.
+ */
+#define SOF_TKN_COMP_NO_WNAME_IN_KCONTROL_NAME	417
 
 /* SSP */
 #define SOF_TKN_INTEL_SSP_CLKS_CONTROL		500

sound/soc/soc-dapm.c

@@ -916,6 +916,8 @@ static int dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget *w,
 				return -EINVAL;
 			}
 		}
+		if (w->no_wname_in_kcontrol_name)
+			wname_in_long_name = false;
 
 		if (wname_in_long_name && kcname_in_long_name) {
 			/*

sound/soc/sof/topology.c

@@ -1367,6 +1367,20 @@ static int sof_parse_pin_binding(struct snd_sof_widget *swidget,
 	return ret;
 }
 
+static int get_w_no_wname_in_long_name(void *elem, void *object, u32 offset)
+{
+	struct snd_soc_tplg_vendor_value_elem *velem = elem;
+	struct snd_soc_dapm_widget *w = object;
+
+	w->no_wname_in_kcontrol_name = !!le32_to_cpu(velem->value);
+	return 0;
+}
+
+static const struct sof_topology_token dapm_widget_tokens[] = {
+	{SOF_TKN_COMP_NO_WNAME_IN_KCONTROL_NAME, SND_SOC_TPLG_TUPLE_TYPE_BOOL,
+	 get_w_no_wname_in_long_name, 0}
+};
+
 /* external widget init - used for any driver specific init */
 static int sof_widget_ready(struct snd_soc_component *scomp, int index,
 			    struct snd_soc_dapm_widget *w,
@@ -1397,6 +1411,14 @@ static int sof_widget_ready(struct snd_soc_component *scomp, int index,
 	ida_init(&swidget->output_queue_ida);
 	ida_init(&swidget->input_queue_ida);
 
+	ret = sof_parse_tokens(scomp, w, dapm_widget_tokens, ARRAY_SIZE(dapm_widget_tokens),
+			       priv->array, le32_to_cpu(priv->size));
+	if (ret < 0) {
+		dev_err(scomp->dev, "failed to parse dapm widget tokens for %s\n",
+			w->name);
+		goto widget_free;
+	}
+
 	ret = sof_parse_tokens(scomp, swidget, comp_pin_tokens,
 			       ARRAY_SIZE(comp_pin_tokens), priv->array,
 			       le32_to_cpu(priv->size));