ALSA: hda - Reduce redundant mic location prefix in input source labels

When the mic pins are assigned to the same location, we can omit the
redundant location prefix like "Front" or "Rear".
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_codec.c

@@ -4618,32 +4618,64 @@ int snd_hda_parse_pin_def_config(struct hda_codec *codec,
 }
 EXPORT_SYMBOL_HDA(snd_hda_parse_pin_def_config);
 
+enum {
+	MIC_ATTR_INT,
+	MIC_ATTR_DOCK,
+	MIC_ATTR_NORMAL,
+	MIC_ATTR_FRONT,
+	MIC_ATTR_REAR,
+};
+
+static int get_mic_pin_attr(unsigned int def_conf)
+{
+	unsigned int loc = get_defcfg_location(def_conf);
+	if (get_defcfg_connect(def_conf) == AC_JACK_PORT_FIXED ||
+	    (loc & 0x30) == AC_JACK_LOC_INTERNAL)
+		return MIC_ATTR_INT;
+	if ((loc & 0x30) == AC_JACK_LOC_SEPARATE)
+		return MIC_ATTR_DOCK;
+	if (loc == AC_JACK_LOC_REAR)
+		return MIC_ATTR_REAR;
+	if (loc == AC_JACK_LOC_FRONT)
+		return MIC_ATTR_FRONT;
+	return MIC_ATTR_NORMAL;
+}
+
+enum {
+	LINE_ATTR_DOCK,
+	LINE_ATTR_NORMAL,
+};
+
+static int get_line_pin_attr(unsigned int def_conf)
+{
+	unsigned int loc = get_defcfg_location(def_conf);
+	if ((loc & 0xf0) == AC_JACK_LOC_SEPARATE)
+		return LINE_ATTR_DOCK;
+	return LINE_ATTR_NORMAL;
+}
+
 const char *hda_get_input_pin_label(struct hda_codec *codec, hda_nid_t pin,
 					int check_location)
 {
-	unsigned int def_conf, loc;
+	unsigned int def_conf;
+	static const char *mic_names[] = {
+		"Internal Mic", "Dock Mic", "Mic", "Front Mic", "Rear Mic",
+	};
+	static const char *line_names[] = {
+		"Dock Line", "Line",
+	};
 
 	def_conf = snd_hda_codec_get_pincfg(codec, pin);
-	loc = get_defcfg_location(def_conf);
 
 	switch (get_defcfg_device(def_conf)) {
 	case AC_JACK_MIC_IN:
 		if (!check_location)
 			return "Mic";
-		if (get_defcfg_connect(def_conf) == AC_JACK_PORT_FIXED ||
-		    (loc & 0x30) == AC_JACK_LOC_INTERNAL)
-			return "Internal Mic";
-		if ((loc & 0x30) == AC_JACK_LOC_SEPARATE)
-			return "Dock Mic";
-		if (loc == AC_JACK_LOC_REAR)
-			return "Rear Mic";
-		return "Mic";
+		return mic_names[get_mic_pin_attr(def_conf)];
 	case AC_JACK_LINE_IN:
 		if (!check_location)
 			return "Line";
-		if ((loc & 0xf0) == AC_JACK_LOC_SEPARATE)
-			return "Dock Line";
-		return "Line";
+		return line_names[get_line_pin_attr(def_conf)];
 	case AC_JACK_AUX:
 		return "Aux";
 	case AC_JACK_CD:
@@ -4658,6 +4690,36 @@ const char *hda_get_input_pin_label(struct hda_codec *codec, hda_nid_t pin,
 }
 EXPORT_SYMBOL_HDA(hda_get_input_pin_label);
 
+/* Check whether the location prefix needs to be added to the label.
+ * If all mic-jacks are in the same location (e.g. rear panel), we don't
+ * have to put "Front" prefix to each label.  In such a case, returns false.
+ */
+static int check_mic_location_need(struct hda_codec *codec,
+				   const struct auto_pin_cfg *cfg,
+				   int input)
+{
+	unsigned int defc;
+	int i, attr, attr2;
+
+	defc = snd_hda_codec_get_pincfg(codec, cfg->inputs[input].pin);
+	attr = get_mic_pin_attr(defc);
+	/* for internal or docking mics, we need locations */
+	if (attr <= MIC_ATTR_NORMAL)
+		return 1;
+
+	attr = 0;
+	for (i = 0; i < cfg->num_inputs; i++) {
+		defc = snd_hda_codec_get_pincfg(codec, cfg->inputs[i].pin);
+		attr2 = get_mic_pin_attr(defc);
+		if (attr2 >= MIC_ATTR_NORMAL) {
+			if (attr && attr != attr2)
+				return 1; /* different locations found */
+			attr = attr2;
+		}
+	}
+	return 0;
+}
+
 const char *hda_get_autocfg_input_label(struct hda_codec *codec,
 					const struct auto_pin_cfg *cfg,
 					int input)
@@ -4668,6 +4730,8 @@ const char *hda_get_autocfg_input_label(struct hda_codec *codec,
 	if ((input > 0 && cfg->inputs[input - 1].type == type) ||
 	    (input < cfg->num_inputs - 1 && cfg->inputs[input + 1].type == type))
 		has_multiple_pins = 1;
+	if (has_multiple_pins && type == AUTO_PIN_MIC)
+		has_multiple_pins &= check_mic_location_need(codec, cfg, input);
 	return hda_get_input_pin_label(codec, cfg->inputs[input].pin,
 				       has_multiple_pins);
 }