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Merge "sound: usb: Add quirk to issue SET_CUR volume on 2nd channel"

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Linux Build Service Account 2017-06-23 05:56:56 -07:00 • committed by Gerrit - the friendly Code Review server
commit 2e04fffa4a
1 changed files with 11 additions and 0 deletions
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11
sound/usb/mixer.c
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@ -1012,6 +1012,17 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
cval->res = 384; cval->res = 384;
} }
break; break;
case USB_ID(0x1130, 0x1620): /* Logitech Speakers S150 */
/* This audio device has 2 channels and it explicitly requires the
* host to send SET_CUR command on the volume control of both the
* channels. 7936 = 0x1F00 is the default value.
*/
if (cval->channels == 2)
snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR,
(cval->control << 8) | 2, 7936);
break;
} }
} }