ALSA: hda - Add support for HP dv6

Add the quirk entry for HP dv6.  Also add a workaround for the headphone
detection by setting hp_detect=1 beforehand.  Without this, the driver
won't do auto-muting because BIOS doesn't give any HP pin but only a
line-out pin.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_sigmatel.c

@@ -1690,6 +1690,8 @@ static struct snd_pci_quirk stac92hd71bxx_cfg_tbl[] = {
 		      "HP mini 1000", STAC_HP_M4),
 	SND_PCI_QUIRK(PCI_VENDOR_ID_HP, 0x361b,
 		      "HP HDX", STAC_HP_HDX),  /* HDX16 */
+	SND_PCI_QUIRK_MASK(PCI_VENDOR_ID_HP, 0xfff0, 0x3620,
+		      "HP dv6", STAC_HP_DV5),
 	SND_PCI_QUIRK_MASK(PCI_VENDOR_ID_HP, 0xfff0, 0x7010,
 		      "HP", STAC_HP_DV5),
 	SND_PCI_QUIRK(PCI_VENDOR_ID_DELL, 0x0233,
@@ -5383,6 +5385,11 @@ again:
 	case STAC_HP_DV5:
 		snd_hda_codec_set_pincfg(codec, 0x0d, 0x90170010);
 		stac92xx_auto_set_pinctl(codec, 0x0d, AC_PINCTL_OUT_EN);
+		/* HP dv6 gives the headphone pin as a line-out.  Thus we
+		 * need to set hp_detect flag here to force to enable HP
+		 * detection.
+		 */
+		spec->hp_detect = 1;
 		break;
 	case STAC_HP_HDX:
 		spec->num_dmics = 1;