ALSA: usb-audio: add quirk for Samsung USBC Headset (AKG)

commit a32a1fc99807244d920d274adc46ba04b538cc8a upstream.

We've found Samsung USBC Headset (AKG) (VID: 0x04e8, PID: 0xa051)
need a tiny delay after each class compliant request.
Otherwise the device might not be able to be recognized each times.

Signed-off-by: Chihhao Chen <chihhao.chen@mediatek.com>
Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1592910203-24035-1-git-send-email-macpaul.lin@mediatek.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index b5e9fe04861899531b58f0fd04b0b68681ea6aeb..d7d900ebcf37fb61d57bd6772c3ca0e9305fef29 100644 (file)
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1647,6 +1647,14 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
             chip->usb_id == USB_ID(0x0951, 0x16ad)) &&
            (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
                usleep_range(1000, 2000);
+
+       /*
+        * Samsung USBC Headset (AKG) need a tiny delay after each
+        * class compliant request. (Model number: AAM625R or AAM627R)
+        */
+       if (chip->usb_id == USB_ID(0x04e8, 0xa051) &&
+           (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
+               usleep_range(5000, 6000);
 }
 
 /*