diff options
| author | Chris Chiu <chiu@endlessm.com> | 2020-05-26 14:26:13 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-03 08:16:41 +0200 |
| commit | 3049246b669aa45bace38247aae798cb2075c5c5 (patch) | |
| tree | 238d8065d17492a495143031fe360e587e4db948 | |
| parent | 93b7bf07e595b0142b903f96abb6b34501765802 (diff) | |
| download | linux-rt-3049246b669aa45bace38247aae798cb2075c5c5.tar.gz | |
ALSA: usb-audio: mixer: volume quirk for ESS Technology Asus USB DAC
[ Upstream commit 4020d1ccbe55bdf67b31d718d2400506eaf4b43f ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -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 e2f62362a0b0..024864ce3f76 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -980,6 +980,14 @@ 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; } } |