[PATCH 5.4 100/123] HID: multitouch: Add required quirk for Synaptics 0xcd7e device

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5.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Rahul Rameshbabu <sergeantsagara@xxxxxxxxxxxxxx>

[ Upstream commit 1437e4547edf41689d7135faaca4222ef0081bc1 ]

Register the Synaptics device as a special multitouch device with certain
quirks that may improve usability of the touchpad device.

Reported-by: Rain <rain@xxxxxxxxxxxxx>
Closes: https://lore.kernel.org/linux-input/2bbb8e1d-1793-4df1-810f-cb0137341ff4@xxxxxxxxxxxxxxxx/
Signed-off-by: Rahul Rameshbabu <sergeantsagara@xxxxxxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/hid/hid-multitouch.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 0893b31e6f102..590b25460456b 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -2081,6 +2081,10 @@ static const struct hid_device_id mt_devices[] = {
 			USB_DEVICE_ID_MTP_STM)},
 
 	/* Synaptics devices */
+	{ .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
+		HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
+			USB_VENDOR_ID_SYNAPTICS, 0xcd7e) },
+
 	{ .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
 		HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
 			USB_VENDOR_ID_SYNAPTICS, 0xce08) },
-- 
2.40.1






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