return 1;
 }
 
+static int ad198x_ch_mode_info(struct snd_kcontrol *kcontrol,
+                              struct snd_ctl_elem_info *uinfo);
+static int ad198x_ch_mode_get(struct snd_kcontrol *kcontrol,
+                             struct snd_ctl_elem_value *ucontrol);
+static int ad198x_ch_mode_put(struct snd_kcontrol *kcontrol,
+                             struct snd_ctl_elem_value *ucontrol);
+
+
 /*
  * AD1986A specific
  */
        { } /* end */
 };
 
+/* additional mixers for 3stack mode */
+static struct snd_kcontrol_new ad1986a_3st_mixers[] = {
+       {
+               .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+               .name = "Channel Mode",
+               .info = ad198x_ch_mode_info,
+               .get = ad198x_ch_mode_get,
+               .put = ad198x_ch_mode_put,
+       },
+       { } /* end */
+};
+
+/* laptop model - 2ch only */
+static hda_nid_t ad1986a_laptop_dac_nids[1] = { AD1986A_FRONT_DAC };
+
+static struct snd_kcontrol_new ad1986a_laptop_mixers[] = {
+       HDA_CODEC_VOLUME("PCM Playback Volume", 0x03, 0x0, HDA_OUTPUT),
+       HDA_CODEC_MUTE("PCM Playback Switch", 0x03, 0x0, HDA_OUTPUT),
+       HDA_CODEC_VOLUME("Master Playback Volume", 0x1b, 0x0, HDA_OUTPUT),
+       HDA_CODEC_MUTE("Master Playback Switch", 0x1b, 0x0, HDA_OUTPUT),
+       /* HDA_CODEC_VOLUME("Headphone Playback Volume", 0x1a, 0x0, HDA_OUTPUT),
+          HDA_CODEC_MUTE("Headphone Playback Switch", 0x1a, 0x0, HDA_OUTPUT), */
+       HDA_CODEC_VOLUME("CD Playback Volume", 0x15, 0x0, HDA_OUTPUT),
+       HDA_CODEC_MUTE("CD Playback Switch", 0x15, 0x0, HDA_OUTPUT),
+       HDA_CODEC_VOLUME("Line Playback Volume", 0x17, 0x0, HDA_OUTPUT),
+       HDA_CODEC_MUTE("Line Playback Switch", 0x17, 0x0, HDA_OUTPUT),
+       HDA_CODEC_VOLUME("Aux Playback Volume", 0x16, 0x0, HDA_OUTPUT),
+       HDA_CODEC_MUTE("Aux Playback Switch", 0x16, 0x0, HDA_OUTPUT),
+       HDA_CODEC_VOLUME("Mic Playback Volume", 0x13, 0x0, HDA_OUTPUT),
+       HDA_CODEC_MUTE("Mic Playback Switch", 0x13, 0x0, HDA_OUTPUT),
+       /* HDA_CODEC_VOLUME("PC Speaker Playback Volume", 0x18, 0x0, HDA_OUTPUT),
+          HDA_CODEC_MUTE("PC Speaker Playback Switch", 0x18, 0x0, HDA_OUTPUT),
+          HDA_CODEC_VOLUME("Mono Playback Volume", 0x1e, 0x0, HDA_OUTPUT),
+          HDA_CODEC_MUTE("Mono Playback Switch", 0x1e, 0x0, HDA_OUTPUT), */
+       HDA_CODEC_VOLUME("Capture Volume", 0x12, 0x0, HDA_OUTPUT),
+       HDA_CODEC_MUTE("Capture Switch", 0x12, 0x0, HDA_OUTPUT),
+       {
+               .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+               .name = "Capture Source",
+               .info = ad198x_mux_enum_info,
+               .get = ad198x_mux_enum_get,
+               .put = ad198x_mux_enum_put,
+       },
+       { } /* end */
+};
+
 /*
  * initialization verbs
  */
        { } /* end */
 };
 
+/* additional verbs for 3-stack model */
+static struct hda_verb ad1986a_3st_init_verbs[] = {
+       /* Mic and line-in selectors */
+       {0x0f, AC_VERB_SET_CONNECT_SEL, 0x2},
+       {0x10, AC_VERB_SET_CONNECT_SEL, 0x1},
+       { } /* end */
+};
+
+static struct hda_verb ad1986a_ch2_init[] = {
+       /* Surround out -> Line In */
+       { 0x1c, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x24 },
+       { 0x1c, AC_VERB_SET_AMP_GAIN_MUTE, 0xb080},
+       /* CLFE -> Mic in */
+       { 0x1d, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x24 },
+       { 0x1d, AC_VERB_SET_AMP_GAIN_MUTE, 0xb080},
+       { } /* end */
+};
+
+static struct hda_verb ad1986a_ch4_init[] = {
+       /* Surround out -> Surround */
+       { 0x1c, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x40 },
+       { 0x1c, AC_VERB_SET_AMP_GAIN_MUTE, 0xb000},
+       /* CLFE -> Mic in */
+       { 0x1d, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x24 },
+       { 0x1d, AC_VERB_SET_AMP_GAIN_MUTE, 0xb080},
+       { } /* end */
+};
+
+static struct hda_verb ad1986a_ch6_init[] = {
+       /* Surround out -> Surround out */
+       { 0x1c, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x40 },
+       { 0x1c, AC_VERB_SET_AMP_GAIN_MUTE, 0xb000},
+       /* CLFE -> CLFE */
+       { 0x1d, AC_VERB_SET_PIN_WIDGET_CONTROL, 0x40 },
+       { 0x1d, AC_VERB_SET_AMP_GAIN_MUTE, 0xb000},
+       { } /* end */
+};
+
+static struct hda_channel_mode ad1986a_modes[3] = {
+       { 2, ad1986a_ch2_init },
+       { 4, ad1986a_ch4_init },
+       { 6, ad1986a_ch6_init },
+};
+
+/* models */
+enum { AD1986A_6STACK, AD1986A_3STACK, AD1986A_LAPTOP };
+
+static struct hda_board_config ad1986a_cfg_tbl[] = {
+       { .modelname = "6stack",        .config = AD1986A_6STACK },
+       { .modelname = "3stack",        .config = AD1986A_3STACK },
+       { .modelname = "laptop",        .config = AD1986A_LAPTOP },
+       { .pci_subvendor = 0x144d, .pci_subdevice = 0xc01e,
+         .config = AD1986A_LAPTOP }, /* FSC V2060 */
+       { .pci_subvendor = 0x17c0, .pci_subdevice = 0x2017,
+         .config = AD1986A_LAPTOP }, /* Samsung M50 */
+       {}
+};
 
 static int patch_ad1986a(struct hda_codec *codec)
 {
        struct ad198x_spec *spec;
+       int board_config;
 
        spec = kzalloc(sizeof(*spec), GFP_KERNEL);
        if (spec == NULL)
 
        codec->patch_ops = ad198x_patch_ops;
 
+       /* override some parameters */
+       board_config = snd_hda_check_board_config(codec, ad1986a_cfg_tbl);
+       switch (board_config) {
+       case AD1986A_3STACK:
+               spec->num_mixers = 2;
+               spec->mixers[1] = ad1986a_3st_mixers;
+               spec->num_init_verbs = 2;
+               spec->init_verbs[1] = ad1986a_3st_init_verbs;
+               spec->channel_mode = ad1986a_modes;
+               spec->num_channel_mode = ARRAY_SIZE(ad1986a_modes);
+               break;
+       case AD1986A_LAPTOP:
+               spec->mixers[0] = ad1986a_laptop_mixers;
+               spec->multiout.max_channels = 2;
+               spec->multiout.num_dacs = 1;
+               spec->multiout.dac_nids = ad1986a_laptop_dac_nids;
+               break;
+       }
+
        return 0;
 }