STAC_92HD71BXX_REF,
        STAC_DELL_M4_1,
        STAC_DELL_M4_2,
+       STAC_DELL_M4_3,
        STAC_HP_M4,
        STAC_92HD71BXX_MODELS
 };
        0x40f000f0, 0x044413b0, 0x044413b0,
 };
 
+static unsigned int dell_m4_3_pin_configs[11] = {
+       0x0421101f, 0x04a11221, 0x90a70330, 0x90170110,
+       0x40f000f0, 0x40f000f0, 0x40f000f0, 0x90a000f0,
+       0x40f000f0, 0x044413b0, 0x044413b0,
+};
+
 static unsigned int *stac92hd71bxx_brd_tbl[STAC_92HD71BXX_MODELS] = {
        [STAC_92HD71BXX_REF] = ref92hd71bxx_pin_configs,
        [STAC_DELL_M4_1]        = dell_m4_1_pin_configs,
        [STAC_DELL_M4_2]        = dell_m4_2_pin_configs,
+       [STAC_DELL_M4_3]        = dell_m4_3_pin_configs,
        [STAC_HP_M4]            = NULL,
 };
 
        [STAC_92HD71BXX_REF] = "ref",
        [STAC_DELL_M4_1] = "dell-m4-1",
        [STAC_DELL_M4_2] = "dell-m4-2",
+       [STAC_DELL_M4_3] = "dell-m4-3",
        [STAC_HP_M4] = "hp-m4",
 };
 
                                "unknown Dell", STAC_DELL_M4_2),
        SND_PCI_QUIRK(PCI_VENDOR_ID_DELL, 0x0264,
                                "unknown Dell", STAC_DELL_M4_2),
+       SND_PCI_QUIRK(PCI_VENDOR_ID_DELL, 0x02aa,
+                               "unknown Dell", STAC_DELL_M4_3),
        {} /* terminator */
 };
 
 
        switch (spec->board_config) {
        case STAC_HP_M4:
-               spec->num_dmics = 0;
-               spec->num_smuxes = 0;
-               spec->num_dmuxes = 0;
-
                /* enable internal microphone */
                stac92xx_set_config_reg(codec, 0x0e, 0x01813040);
                stac92xx_auto_set_pinctl(codec, 0x0e,
                        AC_PINCTL_IN_EN | AC_PINCTL_VREF_80);
+               /* fallthru */
+       case STAC_DELL_M4_2:
+               spec->num_dmics = 0;
+               spec->num_smuxes = 0;
+               spec->num_dmuxes = 0;
+               break;
+       case STAC_DELL_M4_1:
+       case STAC_DELL_M4_3:
+               spec->num_dmics = 1;
+               spec->num_smuxes = 0;
+               spec->num_dmuxes = 0;
                break;
        default:
                spec->num_dmics = STAC92HD71BXX_NUM_DMICS;