ALSA: hda/realtek: fix a determine_headset_type issue for a Dell AIO

We found a recording issue on a Dell AIO, users plug a headset-mic and
select headset-mic from UI, but can't record any sound from
headset-mic. The root cause is the determine_headset_type() returns a
wrong type, e.g. users plug a ctia type headset, but that function
returns omtp type.

On this machine, the internal mic is not connected to the codec, the
"Input Source" is headset mic by default. And when users plug a
headset, the determine_headset_type() will be called immediately, the
codec on this AIO is alc274, the delay time for this codec in the
determine_headset_type() is only 80ms, the delay is too short to
correctly determine the headset type, the fail rate is nearly 99% when
users plug the headset with the normal speed.

Other codecs set several hundred ms delay time, so here I change the
delay time to 850ms for alc2x4 series, after this change, the fail
rate is zero unless users plug the headset slowly on purpose.

Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/20210320091542.6748-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 316b9b4ccb32d179a00a2c87645d85b231a5ee1d..8935bbe411a28d1092d14255252aba5ca23b498a 100644 (file)
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -5256,7 +5256,7 @@ static void alc_determine_headset_type(struct hda_codec *codec)
        case 0x10ec0274:
        case 0x10ec0294:
                alc_process_coef_fw(codec, coef0274);
-               msleep(80);
+               msleep(850);
                val = alc_read_coef_idx(codec, 0x46);
                is_ctia = (val & 0x00f0) == 0x00f0;
                break;