| From ad37b737e762a132c203df02d16902119116ef84 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Tue, 26 May 2020 14:26:13 +0800 |
| Subject: ALSA: usb-audio: mixer: volume quirk for ESS Technology Asus USB DAC |
| |
| From: Chris Chiu <chiu@endlessm.com> |
| |
| [ 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> |
| --- |
| sound/usb/mixer.c | 8 ++++++++ |
| 1 file changed, 8 insertions(+) |
| |
| diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c |
| index 7a2961ad60de..68fefe55e5c0 100644 |
| --- a/sound/usb/mixer.c |
| +++ b/sound/usb/mixer.c |
| @@ -1171,6 +1171,14 @@ 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; |
| } |
| } |
| |
| -- |
| 2.25.1 |
| |
