2 files changed, 23 insertions, 4 deletions

diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index e0e54a27fc10..147f1764d976 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -1072,6 +1072,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
           ref           Reference board
           dell-m4-1     Dell desktops
           dell-m4-2     Dell desktops
+          dell-m4-3     Dell desktops
 
         STAC92HD73*
           ref           Reference board
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 31a234afe1af..9047dc76b007 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -84,6 +84,7 @@ enum {
         STAC_92HD71BXX_REF,
         STAC_DELL_M4_1,
         STAC_DELL_M4_2,
+        STAC_DELL_M4_3,
         STAC_HP_M4,
         STAC_92HD71BXX_MODELS
 };
@@ -1671,10 +1672,17 @@ static unsigned int dell_m4_2_pin_configs[11] = {
         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,
 };
 
@@ -1682,6 +1690,7 @@ static const char *stac92hd71bxx_models[STAC_92HD71BXX_MODELS] = {
         [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",
 };
 
@@ -1717,6 +1726,8 @@ static struct snd_pci_quirk stac92hd71bxx_cfg_tbl[] = {
                                 "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 */
 };
 
@@ -4571,14 +4582,21 @@ again:
 
         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;