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authorTakashi Iwai <tiwai@suse.de>2013-12-19 14:32:53 +0100
committerTakashi Iwai <tiwai@suse.de>2013-12-20 16:37:02 +0100
commit19570d747795f0ecff79403698b868dc5ad7fa86 (patch)
tree5a6ac72e3f80db30d4e7ab45b67f4d45f3ab534d /sound/usb/quirks.c
parent0f4881dc1fd858649589edae76efd9c318bb562f (diff)
downloadlinux-19570d747795f0ecff79403698b868dc5ad7fa86.tar.bz2
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>
Diffstat (limited to 'sound/usb/quirks.c')
-rw-r--r--sound/usb/quirks.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 0df9ede99dfd..ede753685491 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -660,6 +660,18 @@ static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
return err;
}
+/* quirk for Plantronics GameCom 780 with CM6302 chip */
+static int snd_usb_gamecon780_boot_quirk(struct usb_device *dev)
+{
+ /* set the initial volume and don't change; other values are either
+ * too loud or silent due to firmware bug (bko#65251)
+ */
+ u8 buf[2] = { 0x74, 0xdc };
+ return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
+ USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ UAC_FU_VOLUME << 8, 9 << 8, buf, 2);
+}
+
/*
* Novation Twitch DJ controller
*/
@@ -986,6 +998,8 @@ int snd_usb_apply_boot_quirk(struct usb_device *dev,
return snd_usb_nativeinstruments_boot_quirk(dev);
case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */
return snd_usb_fasttrackpro_boot_quirk(dev);
+ case USB_ID(0x047f, 0xc010): /* Plantronics Gamecom 780 */
+ return snd_usb_gamecon780_boot_quirk(dev);
}
return 0;