ALSA: hda - Headphone mic support for an Asus/Conexant device

This Conexant codec has a single jack that can be used as either
headphone or mic (but not headset). The existing hp_mic functionality
does not apply here, because the mic and the HP are on separate pins.

Hence make a lighter version of what has been earlier done for Realtek
codecs.

BugLink: https://bugs.launchpad.net/bugs/1198030
Tested-by: Franz Hsieh <franz.hsieh@canonical.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 78 insertions, 1 deletions

diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index de00ce166470..4edd2d0f9a3c 100644
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -66,6 +66,8 @@ struct conexant_spec {
         hda_nid_t eapds[4];
         bool dynamic_eapd;
 
+        unsigned int parse_flags; /* flag for snd_hda_parse_pin_defcfg() */
+
 #ifdef ENABLE_CXT_STATIC_QUIRKS
         const struct snd_kcontrol_new *mixers[5];
         int num_mixers;
@@ -3200,6 +3202,9 @@ static int cx_auto_init(struct hda_codec *codec)
         snd_hda_gen_init(codec);
         if (!spec->dynamic_eapd)
                 cx_auto_turn_eapd(codec, spec->num_eapds, spec->eapds, true);
+
+        snd_hda_apply_fixup(codec, HDA_FIXUP_ACT_INIT);
+
         return 0;
 }
 
@@ -3224,6 +3229,8 @@ enum {
         CXT_PINCFG_LEMOTE_A1205,
         CXT_FIXUP_STEREO_DMIC,
         CXT_FIXUP_INC_MIC_BOOST,
+        CXT_FIXUP_HEADPHONE_MIC_PIN,
+        CXT_FIXUP_HEADPHONE_MIC,
 };
 
 static void cxt_fixup_stereo_dmic(struct hda_codec *codec,
@@ -3246,6 +3253,59 @@ static void cxt5066_increase_mic_boost(struct hda_codec *codec,
                                   (0 << AC_AMPCAP_MUTE_SHIFT));
 }
 
+static void cxt_update_headset_mode(struct hda_codec *codec)
+{
+        /* The verbs used in this function were tested on a Conexant CX20751/2 codec. */
+        int i;
+        bool mic_mode = false;
+        struct conexant_spec *spec = codec->spec;
+        struct auto_pin_cfg *cfg = &spec->gen.autocfg;
+
+        hda_nid_t mux_pin = spec->gen.imux_pins[spec->gen.cur_mux[0]];
+
+        for (i = 0; i < cfg->num_inputs; i++)
+                if (cfg->inputs[i].pin == mux_pin) {
+                        mic_mode = !!cfg->inputs[i].is_headphone_mic;
+                        break;
+                }
+
+        if (mic_mode) {
+                snd_hda_codec_write_cache(codec, 0x1c, 0, 0x410, 0x7c); /* enable merged mode for analog int-mic */
+                spec->gen.hp_jack_present = false;
+        } else {
+                snd_hda_codec_write_cache(codec, 0x1c, 0, 0x410, 0x54); /* disable merged mode for analog int-mic */
+                spec->gen.hp_jack_present = snd_hda_jack_detect(codec, spec->gen.autocfg.hp_pins[0]);
+        }
+
+        snd_hda_gen_update_outputs(codec);
+}
+
+static void cxt_update_headset_mode_hook(struct hda_codec *codec,
+                             struct snd_ctl_elem_value *ucontrol)
+{
+        cxt_update_headset_mode(codec);
+}
+
+static void cxt_fixup_headphone_mic(struct hda_codec *codec,
+                                    const struct hda_fixup *fix, int action)
+{
+        struct conexant_spec *spec = codec->spec;
+
+        switch (action) {
+        case HDA_FIXUP_ACT_PRE_PROBE:
+                spec->parse_flags |= HDA_PINCFG_HEADPHONE_MIC;
+                break;
+        case HDA_FIXUP_ACT_PROBE:
+                spec->gen.cap_sync_hook = cxt_update_headset_mode_hook;
+                spec->gen.automute_hook = cxt_update_headset_mode;
+                break;
+        case HDA_FIXUP_ACT_INIT:
+                cxt_update_headset_mode(codec);
+                break;
+        }
+}
+
+
 /* ThinkPad X200 & co with cxt5051 */
 static const struct hda_pintbl cxt_pincfg_lenovo_x200[] = {
         { 0x16, 0x042140ff }, /* HP (seq# overridden) */
@@ -3302,6 +3362,19 @@ static const struct hda_fixup cxt_fixups[] = {
                 .type = HDA_FIXUP_FUNC,
                 .v.func = cxt5066_increase_mic_boost,
         },
+        [CXT_FIXUP_HEADPHONE_MIC_PIN] = {
+                .type = HDA_FIXUP_PINS,
+                .chained = true,
+                .chain_id = CXT_FIXUP_HEADPHONE_MIC,
+                .v.pins = (const struct hda_pintbl[]) {
+                        { 0x18, 0x03a1913d }, /* use as headphone mic, without its own jack detect */
+                        { }
+                }
+        },
+        [CXT_FIXUP_HEADPHONE_MIC] = {
+                .type = HDA_FIXUP_FUNC,
+                .v.func = cxt_fixup_headphone_mic,
+        },
 };
 
 static const struct snd_pci_quirk cxt5051_fixups[] = {
@@ -3311,6 +3384,7 @@ static const struct snd_pci_quirk cxt5051_fixups[] = {
 
 static const struct snd_pci_quirk cxt5066_fixups[] = {
         SND_PCI_QUIRK(0x1025, 0x0543, "Acer Aspire One 522", CXT_FIXUP_STEREO_DMIC),
+        SND_PCI_QUIRK(0x1043, 0x138d, "Asus", CXT_FIXUP_HEADPHONE_MIC_PIN),
         SND_PCI_QUIRK(0x17aa, 0x20f2, "Lenovo T400", CXT_PINCFG_LENOVO_TP410),
         SND_PCI_QUIRK(0x17aa, 0x215e, "Lenovo T410", CXT_PINCFG_LENOVO_TP410),
         SND_PCI_QUIRK(0x17aa, 0x215f, "Lenovo T510", CXT_PINCFG_LENOVO_TP410),
@@ -3395,7 +3469,8 @@ static int patch_conexant_auto(struct hda_codec *codec)
 
         snd_hda_apply_fixup(codec, HDA_FIXUP_ACT_PRE_PROBE);
 
-        err = snd_hda_parse_pin_defcfg(codec, &spec->gen.autocfg, NULL, 0);
+        err = snd_hda_parse_pin_defcfg(codec, &spec->gen.autocfg, NULL,
+                                       spec->parse_flags);
         if (err < 0)
                 goto error;
 
@@ -3416,6 +3491,8 @@ static int patch_conexant_auto(struct hda_codec *codec)
                 codec->bus->allow_bus_reset = 1;
         }
 
+        snd_hda_apply_fixup(codec, HDA_FIXUP_ACT_PROBE);
+
         return 0;
 
  error: