2 files changed, 94 insertions, 0 deletions

diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 1def6049784c..baf18c6afdd6 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -701,6 +701,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
           uniwill       3-jack
           F1734         2-jack
           lg            LG laptop (m1 express dual)
+          lg-lw         LG LW20 laptop
           test          for testing/debugging purpose, almost all controls can be
                         adjusted.  Appearing only when compiled with
                         $CONFIG_SND_DEBUG=y
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 4c6c9ec8ea5b..6b45635b3ea3 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -52,6 +52,7 @@ enum {
         ALC880_CLEVO,
         ALC880_TCL_S700,
         ALC880_LG,
+        ALC880_LG_LW,
 #ifdef CONFIG_SND_DEBUG
         ALC880_TEST,
 #endif
@@ -1427,6 +1428,82 @@ static void alc880_lg_unsol_event(struct hda_codec *codec, unsigned int res)
 }
 
 /*
+ * LG LW20
+ *
+ * Pin assignment:
+ *   Speaker-out: 0x14
+ *   Mic-In: 0x18
+ *   Built-in Mic-In: 0x19 (?)
+ *   HP-Out: 0x1b
+ *   SPDIF-Out: 0x1e
+ */
+
+/* seems analog CD is not working */
+static struct hda_input_mux alc880_lg_lw_capture_source = {
+        .num_items = 2,
+        .items = {
+                { "Mic", 0x0 },
+                { "Internal Mic", 0x1 },
+        },
+};
+
+static struct snd_kcontrol_new alc880_lg_lw_mixer[] = {
+        HDA_CODEC_VOLUME("Master Playback Volume", 0x0c, 0x0, HDA_OUTPUT),
+        HDA_BIND_MUTE("Master Playback Switch", 0x0c, 2, HDA_INPUT),
+        HDA_CODEC_VOLUME("Mic Playback Volume", 0x0b, 0x0, HDA_INPUT),
+        HDA_CODEC_MUTE("Mic Playback Switch", 0x0b, 0x0, HDA_INPUT),
+        HDA_CODEC_VOLUME("Internal Mic Playback Volume", 0x0b, 0x01, HDA_INPUT),
+        HDA_CODEC_MUTE("Internal Mic Playback Switch", 0x0b, 0x01, HDA_INPUT),
+        { } /* end */
+};
+
+static struct hda_verb alc880_lg_lw_init_verbs[] = {
+        /* set capture source to mic-in */
+        {0x07, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(0)},
+        {0x08, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(0)},
+        {0x09, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(0)},
+        {0x0b, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(7)},
+        /* speaker-out */
+        {0x14, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_HP},
+        {0x14, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+        /* HP-out */
+        {0x13, AC_VERB_SET_CONNECT_SEL, 0x00},
+        {0x1b, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_HP},
+        {0x1b, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+        /* mic-in to input */
+        {0x18, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_VREF80},
+        {0x18, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+        /* built-in mic */
+        {0x19, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_VREF80},
+        {0x19, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+        /* jack sense */
+        {0x1b, AC_VERB_SET_UNSOLICITED_ENABLE, AC_USRSP_EN | 0x1},
+        { }
+};
+
+/* toggle speaker-output according to the hp-jack state */
+static void alc880_lg_lw_automute(struct hda_codec *codec)
+{
+        unsigned int present;
+
+        present = snd_hda_codec_read(codec, 0x1b, 0,
+                                     AC_VERB_GET_PIN_SENSE, 0) & 0x80000000;
+        snd_hda_codec_amp_update(codec, 0x14, 0, HDA_OUTPUT, 0,
+                                 0x80, present ? 0x80 : 0);
+        snd_hda_codec_amp_update(codec, 0x14, 1, HDA_OUTPUT, 0,
+                                 0x80, present ? 0x80 : 0);
+}
+
+static void alc880_lg_lw_unsol_event(struct hda_codec *codec, unsigned int res)
+{
+        /* Looks like the unsol event is incompatible with the standard
+         * definition.  4bit tag is placed at 28 bit!
+         */
+        if ((res >> 28) == 0x01)
+                alc880_lg_lw_automute(codec);
+}
+
+/*
  * Common callbacks
  */
 
@@ -2078,6 +2155,9 @@ static struct hda_board_config alc880_cfg_tbl[] = {
         { .modelname = "lg", .config = ALC880_LG },
         { .pci_subvendor = 0x1854, .pci_subdevice = 0x003b, .config = ALC880_LG },
 
+        { .modelname = "lg-lw", .config = ALC880_LG_LW },
+        { .pci_subvendor = 0x1854, .pci_subdevice = 0x0018, .config = ALC880_LG_LW },
+
 #ifdef CONFIG_SND_DEBUG
         { .modelname = "test", .config = ALC880_TEST },
 #endif
@@ -2268,6 +2348,19 @@ static struct alc_config_preset alc880_presets[] = {
                 .unsol_event = alc880_lg_unsol_event,
                 .init_hook = alc880_lg_automute,
         },
+        [ALC880_LG_LW] = {
+                .mixers = { alc880_lg_lw_mixer },
+                .init_verbs = { alc880_volume_init_verbs,
+                                alc880_lg_lw_init_verbs },
+                .num_dacs = 1, 
+                .dac_nids = alc880_dac_nids,
+                .dig_out_nid = ALC880_DIGOUT_NID,
+                .num_channel_mode = ARRAY_SIZE(alc880_2_jack_modes),
+                .channel_mode = alc880_2_jack_modes,
+                .input_mux = &alc880_lg_lw_capture_source,
+                .unsol_event = alc880_lg_lw_unsol_event,
+                .init_hook = alc880_lg_lw_automute,
+        },
 #ifdef CONFIG_SND_DEBUG
         [ALC880_TEST] = {
                 .mixers = { alc880_test_mixer },