diff options
| author | Chris Chiu <chiu@endlessm.com> | 2020-05-26 14:26:13 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-05-26 08:30:35 +0200 |
| commit | 4020d1ccbe55bdf67b31d718d2400506eaf4b43f (patch) | |
| tree | 9710c6003037f13c5a3987cc175d2ac56c3ab822 /sound/usb | |
| parent | 399c01aa49e548c82d40f8161915a5941dd3c60e (diff) | |
ALSA: usb-audio: mixer: volume quirk for ESS Technology Asus USB DAC
The Asus USB DAC is a USB type-C audio dongle for connecting to
the headset and headphone. The volume minimum value -23040 which
is 0xa600 in hexadecimal with the resolution value 1 indicates
this should be endianness issue caused by the firmware bug. Add
a volume quirk to fix the volume control problem.
Also fixes this warning:
Warning! Unlikely big volume range (=23040), cval->res is probably wrong.
[5] FU [Headset Capture Volume] ch = 1, val = -23040/0/1
Warning! Unlikely big volume range (=23040), cval->res is probably wrong.
[7] FU [Headset Playback Volume] ch = 1, val = -23040/0/1
Signed-off-by: Chris Chiu <chiu@endlessm.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200526062613.55401-1-chiu@endlessm.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/mixer.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index a88d7854513b..15769f266790 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -1182,6 +1182,14 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval, cval->res = 384; } break; + case USB_ID(0x0495, 0x3042): /* ESS Technology Asus USB DAC */ + if ((strstr(kctl->id.name, "Playback Volume") != NULL) || + strstr(kctl->id.name, "Capture Volume") != NULL) { + cval->min >>= 8; + cval->max = 0; + cval->res = 1; + } + break; } } |