From a5bd4efac42469be6e1c547cc81d6c46e7fe2f02 Mon Sep 17 00:00:00 2001
From: Maximilian Luz <luzmaximilian@gmail.com>
Date: Sat, 18 Feb 2023 01:02:49 +0100
Subject: [PATCH 16/41] USB: quirks: Add USB_QUIRK_DELAY_INIT for Surface Go 3
 Type-Cover

The touchpad on the Type-Cover of the Surface Go 3 is sometimes not
being initialized properly. Apply USB_QUIRK_DELAY_INIT to fix this
issue.

More specifically, the device in question is a fairly standard modern
touchpad with pointer and touchpad input modes. During setup, the device
needs to be switched from pointer- to touchpad-mode (which is done in
hid-multitouch) to fully utilize it as intended. Unfortunately, however,
this seems to occasionally fail silently, leaving the device in
pointer-mode. Applying USB_QUIRK_DELAY_INIT seems to fix this.

Link: https://github.com/linux-surface/linux-surface/issues/1059
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Patchset: surface-typecover
---
 drivers/usb/core/quirks.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 15e9bd180a1d..0d70461d01e1 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -220,6 +220,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* Microsoft Surface Dock Ethernet (RTL8153 GigE) */
 	{ USB_DEVICE(0x045e, 0x07c6), .driver_info = USB_QUIRK_NO_LPM },
 
+	/* Microsoft Surface Go 3 Type-Cover */
+	{ USB_DEVICE(0x045e, 0x09b5), .driver_info = USB_QUIRK_DELAY_INIT },
+
 	/* Cherry Stream G230 2.0 (G85-231) and 3.0 (G85-232) */
 	{ USB_DEVICE(0x046a, 0x0023), .driver_info = USB_QUIRK_RESET_RESUME },
 
-- 
2.41.0