diff options
| author | wangdicheng <wangdicheng@kylinos.cn> | 2026-10-15 10:12:10 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2026-10-15 09:19:35 +0200 |
| commit | 159294c01a0d7761a0530ede29b2c069251cf33e (patch) | |
| tree | 85029e1a14ec957c44714e902f11abaecddffa2b /tools/lib/python/kdoc/python_version.py | |
| parent | ad28d2f607d1792c04531f2c5fd9ac0bf5bdcc9c (diff) | |
ALSA: hda/realtek: Limit Line In boost and ADC gain on DECENTA MATX03
The DECENTA MATX03 (ALC897, SSID 1e0b:1297) exposes a high gain
range on both the Line In pin boost and the ADC input amp. Pin 0x1a
reports nsteps=0x03 with stepsize=0x27, that is 0, 9.75, 19.5 and
29.25 dB. ADC 0x08 reports nsteps=0x3f with stepsize=0x02, that is
0 to 31.5 dB in 0.5 dB steps, and defaults to 0x3f (maximum). The
combined 60.75 dB analogue cascade overloads the front-end when the
source level is high, producing audible noise during Line In
monitoring.
Add a new fixup alc897_fixup_limit_linein_boost that overrides the
amp capabilities of pin 0x1a to nsteps=1 (max ~11.75 dB) and ADC
0x08 to nsteps=1 (max ~0.5 dB). The total gain drops from 60.75 dB
to ~12.25 dB, eliminating the clipping.
Signed-off-by: wangdicheng <wangdicheng@kylinos.cn>
Link: https://patch.msgid.link/20261015021210.106392-1-wangdich9700@163.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'tools/lib/python/kdoc/python_version.py')
0 files changed, 0 insertions, 0 deletions