ALSA: hda - Fix IDT/STAC multiple HP detection

Due to the recent change for multiple HP as line-out switch, only
one of the multiple headphons (usually a wrong one) is toggled
and the other pins are still disabled. This causes the silent output
problem on some Dell laptops.

Also, the hp_switch check is screwed up when a line-in or a mic-in
jack exists. This is added as an additional output, but hp_switch
check doesn't take it into account.

This patch fixes these issues: simplify hp_switch check by using
the NID instead of bool, and clean up / fix the toggle of HP pins
in unsol event handler code.

Reference: Novell bnc#443267
https://bugzilla.novell.com/show_bug.cgi?id=443267

Signed-off-by: Takashi Iwai <[e-mail]>

sound/pci/hda/patch_sigmatel.c

···
 	/* i/o switches */
 	unsigned int io_switch[2];
 	unsigned int clfe_swap;
-	unsigned int hp_switch;
+	unsigned int hp_switch; /* NID of HP as line-out */
 	unsigned int aloopback;
 
 	struct hda_pcm pcm_rec[2];	/* PCM information */
···
 	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct sigmatel_spec *spec = codec->spec;
 
-	ucontrol->value.integer.value[0] = spec->hp_switch;
+	ucontrol->value.integer.value[0] = !!spec->hp_switch;
 	return 0;
 }
 
···
 {
 	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct sigmatel_spec *spec = codec->spec;
-
-	spec->hp_switch = ucontrol->value.integer.value[0];
+	int nid = kcontrol->private_value;
+ 
+	spec->hp_switch = ucontrol->value.integer.value[0] ? nid : 0;
 
 	/* check to be sure that the ports are upto date with
 	 * switch changes
···
 	if (cfg->hp_outs > 1) {
 		err = stac92xx_add_control(spec,
 			STAC_CTL_WIDGET_HP_SWITCH,
-			"Headphone as Line Out Switch", 0);
+			"Headphone as Line Out Switch",
+			cfg->hp_pins[cfg->hp_outs - 1]);
 		if (err < 0)
 			return err;
 	}
···
 	return 0;
 }
 
+/* return non-zero if the hp-pin of the given array index isn't
+ * a jack-detection target
+ */
+static int no_hp_sensing(struct sigmatel_spec *spec, int i)
+{
+	struct auto_pin_cfg *cfg = &spec->autocfg;
+
+	/* ignore sensing of shared line and mic jacks */
+	if (spec->line_switch &&
+	    cfg->hp_pins[i] == cfg->input_pins[AUTO_PIN_LINE])
+		return 1;
+	if (spec->mic_switch &&
+	    cfg->hp_pins[i] == cfg->input_pins[AUTO_PIN_MIC])
+		return 1;
+	/* ignore if the pin is set as line-out */
+	if (cfg->hp_pins[i] == spec->hp_switch)
+		return 1;
+	return 0;
+}
+
 static void stac92xx_hp_detect(struct hda_codec *codec, unsigned int res)
 {
 	struct sigmatel_spec *spec = codec->spec;
 	struct auto_pin_cfg *cfg = &spec->autocfg;
-	int nid = cfg->hp_pins[cfg->hp_outs - 1];
 	int i, presence;
 
 	presence = 0;
···
 	for (i = 0; i < cfg->hp_outs; i++) {
 		if (presence)
 			break;
-		if (spec->hp_switch && cfg->hp_pins[i] == nid)
-			break;
+		if (no_hp_sensing(spec, i))
+			continue;
 		presence = get_hp_pin_presence(codec, cfg->hp_pins[i]);
 	}
 
 	if (presence) {
-		/* disable lineouts, enable hp */
+		/* disable lineouts */
 		if (spec->hp_switch)
-			stac92xx_reset_pinctl(codec, nid, AC_PINCTL_OUT_EN);
+			stac92xx_reset_pinctl(codec, spec->hp_switch,
+					      AC_PINCTL_OUT_EN);
 		for (i = 0; i < cfg->line_outs; i++)
 			stac92xx_reset_pinctl(codec, cfg->line_out_pins[i],
 						AC_PINCTL_OUT_EN);
···
 				spec->gpio_dir, spec->gpio_data &
 				~spec->eapd_mask);
 	} else {
-		/* enable lineouts, disable hp */
+		/* enable lineouts */
 		if (spec->hp_switch)
-			stac92xx_set_pinctl(codec, nid, AC_PINCTL_OUT_EN);
+			stac92xx_set_pinctl(codec, spec->hp_switch,
+					    AC_PINCTL_OUT_EN);
 		for (i = 0; i < cfg->line_outs; i++)
 			stac92xx_set_pinctl(codec, cfg->line_out_pins[i],
 						AC_PINCTL_OUT_EN);
···
 				spec->gpio_dir, spec->gpio_data |
 				spec->eapd_mask);
 	}
-	if (!spec->hp_switch && cfg->hp_outs > 1 && presence)
-		stac92xx_set_pinctl(codec, nid, AC_PINCTL_OUT_EN);
+	/* toggle hp outs */
+	for (i = 0; i < cfg->hp_outs; i++) {
+		unsigned int val = AC_PINCTL_OUT_EN | AC_PINCTL_HP_EN;
+		if (no_hp_sensing(spec, i))
+			continue;
+		if (presence)
+			stac92xx_set_pinctl(codec, cfg->hp_pins[i], val);
+		else
+			stac92xx_reset_pinctl(codec, cfg->hp_pins[i], val);
+	}
 } 
 
 static void stac92xx_pin_sense(struct hda_codec *codec, int idx)