if you cannot use debug version, you can modify hdajacksense.c or use hda verb
to check whether the codec can differentitate cita or omtp headset
static void alc_determine_headset_type(struct hda_codec *codec)
+{
+ int val;
+ bool is_ctia = false;
+ struct alc_spec *spec = codec->spec;
+
+ switch (codec->vendor_id) {
+ case 0x10ec0283:
+ alc_write_coef_idx(codec, 0x45, 0xd029);
+ msleep(300);
+ val = alc_read_coef_idx(codec, 0x46);
+ is_ctia = (val & 0x0070) == 0x0070;
+ break;
+ case 0x10ec0292:
+ alc_write_coef_idx(codec, 0x6b, 0xd429);
+ msleep(300);
+ val = alc_read_coef_idx(codec, 0x6c);
+ is_ctia = (val & 0x001c) == 0x001c;
+ break;
+ case 0x10ec0668:
+ alc_write_coef_idx(codec, 0x11, 0x0001);
+ alc_write_coef_idx(codec, 0xb7, 0x802b);
+ alc_write_coef_idx(codec, 0x15, 0x0d60);
+ alc_write_coef_idx(codec, 0xc3, 0x0c00);
+ msleep(300);
+ val = alc_read_coef_idx(codec, 0xbe);
+ is_ctia = (val & 0x1c02) == 0x1c02;
+ break;
+ }
+
+ snd_printdd("Headset jack detected iPhone-style headset: %s\n",
+ is_ctia ? "yes" : "no");
+ spec->current_headset_type = is_ctia ? ALC_HEADSET_TYPE_CTIA :
ALC_HEADSET_TYPE_OMTP;
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https://bugs.launchpad.net/bugs/1414706
Title:
[20ALCTO1WW, Realtek ALC292, Black Mic, Left][Lenovo ThinkPad X240]
external mic has no sound at all
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