ALSA: usb-audio: Add a quirk for Plantronics Gamecom 780
Plantronics Gamecom 780 headset has a firmware problem, and when the
FU 0x09 volume is changed, it results in either too loud or silence
except for a very narrow range. This patch provides a workaround,
ignoring the node, initialize the volume in a sane value and keep
untouched.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=65251
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index cc2dd1f..32af6b7 100644
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -322,6 +322,12 @@
{ 0 } /* terminator */
};
+/* Plantronics Gamecom 780 has a broken volume control, better to disable it */
+static struct usbmix_name_map gamecom780_map[] = {
+ { 9, NULL }, /* FU, speaker out */
+ {}
+};
+
/*
* Control map entries
*/
@@ -358,6 +364,10 @@
.id = USB_ID(0x046d, 0x09a4),
.ignore_ctl_error = 1,
},
+ { /* Plantronics GameCom 780 */
+ .id = USB_ID(0x047f, 0xc010),
+ .map = gamecom780_map,
+ },
{
/* Hercules DJ Console (Windows Edition) */
.id = USB_ID(0x06f8, 0xb000),