Commit 34dedd2a authored by Kai-Heng Feng's avatar Kai-Heng Feng Committed by Takashi Iwai

ALSA: usb-audio: Disable Lenovo P620 Rear line-in volume control

The USB device (0x17aa:0x1046) that support Lenovo P620 rear panel
line-in claim to support volume control, but it doens't seem to have an
AMP, so when line-in volume lowers below 80, nothing gets recorded
anymore.

Disable the volume control to workaround the issue.

Fixes: f8c11eb7 ("ALSA: usb-audio: Add support for Lenovo ThinkStation P620")
Signed-off-by: default avatarKai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20200810133108.31580-1-kai.heng.feng@canonical.comSigned-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 6e859617
...@@ -371,6 +371,7 @@ static const struct usbmix_name_map asus_rog_map[] = { ...@@ -371,6 +371,7 @@ static const struct usbmix_name_map asus_rog_map[] = {
}; };
static const struct usbmix_name_map lenovo_p620_rear_map[] = { static const struct usbmix_name_map lenovo_p620_rear_map[] = {
{ 19, NULL, 2 }, /* FU, Volume */
{ 19, NULL, 12 }, /* FU, Input Gain Pad */ { 19, NULL, 12 }, /* FU, Input Gain Pad */
{} {}
}; };
......
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