1 files changed, 19 insertions, 2 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 4343d5fe5f72..9744ae31dc73 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -80,6 +80,7 @@ enum {
         STAC_92HD71BXX_REF,
         STAC_DELL_M4_1,
         STAC_DELL_M4_2,
+        STAC_HP_M4,
         STAC_92HD71BXX_MODELS
 };
 
@@ -1527,12 +1528,14 @@ 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_HP_M4]            = NULL,
 };
 
 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_HP_M4] = "hp-m4",
 };
 
 static struct snd_pci_quirk stac92hd71bxx_cfg_tbl[] = {
@@ -4204,10 +4207,24 @@ again:
 
         spec->num_muxes = ARRAY_SIZE(stac92hd71bxx_mux_nids);
         spec->num_adcs = ARRAY_SIZE(stac92hd71bxx_adc_nids);
-        spec->num_dmics = STAC92HD71BXX_NUM_DMICS;
-        spec->num_smuxes = ARRAY_SIZE(stac92hd71bxx_smux_nids);
         spec->num_dmuxes = ARRAY_SIZE(stac92hd71bxx_dmux_nids);
 
+        switch (spec->board_config) {
+        case STAC_HP_M4:
+                spec->num_dmics = 0;
+                spec->num_smuxes = 1;
+                spec->num_dmuxes = 0;
+
+                /* enable internal microphone */
+                snd_hda_codec_write_cache(codec, 0x0e, 0,
+                        AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_VREF80);
+                break;
+        default:
+                spec->num_dmics = STAC92HD71BXX_NUM_DMICS;
+                spec->num_smuxes = ARRAY_SIZE(stac92hd71bxx_smux_nids);
+                spec->num_dmuxes = ARRAY_SIZE(stac92hd71bxx_dmux_nids);
+        };
+
         spec->multiout.num_dacs = 1;
         spec->multiout.hp_nid = 0x11;
         spec->multiout.dac_nids = stac92hd71bxx_dac_nids;