2020-06-23 11:08:21

by Macpaul Lin

Subject: [PATCH] sound: usb: quirks: add quirk for Samsung USBC Headset (AKG)

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 <[email protected]>
Signed-off-by: Macpaul Lin <[email protected]>
Cc: [email protected]
---
sound/usb/quirks.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index bca0179..ebba29a 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1673,6 +1673,14 @@ 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);
}

/*
--
1.7.9.5

2020-06-23 14:17:02

by Takashi Iwai

Subject: Re: [PATCH] sound: usb: quirks: add quirk for Samsung USBC Headset (AKG)

On Tue, 23 Jun 2020 13:03:23 +0200,
Macpaul Lin wrote:
>
> 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 <[email protected]>
> Signed-off-by: Macpaul Lin <[email protected]>
> Cc: [email protected]

Thanks, applied.


Takashi