[PATCH] HID: logitech-hidpp: add a module parameter to keep firmware gestures

[Benjamin Tissoires <benjamin.tissoires@redhat.com>]

The Logitech T650 used to report 3 fingers swipes to the up as a press on
the Super key. When we switched the touchpad to the raw mode, we also
disable such firmware gesture and some users may rely on it.

Unfortunately, 3 finger swipes are still not supported in most of the
Linux environments, which means that we disabled a feature of the touchpad.

Allow users to revert the raw reporting mode and keep going with the
firmware gestures by providing a new module parameter.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
---
 drivers/hid/hid-logitech-hidpp.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index e77658c..8e9cb25 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -28,6 +28,11 @@ MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
 MODULE_AUTHOR("Nestor Lopez Casado <nlopezcasad@logitech.com>");
 
+static bool disable_raw_mode;
+module_param(disable_raw_mode, bool, 0644);
+MODULE_PARM_DESC(disable_raw_mode,
+	"Disable Raw mode reporting for touchpads and keep firmware gestures.");
+
 #define REPORT_ID_HIDPP_SHORT			0x10
 #define REPORT_ID_HIDPP_LONG			0x11
 
@@ -1188,6 +1193,11 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
 
 	hidpp->quirks = id->driver_data;
 
+	if (disable_raw_mode) {
+		hidpp->quirks &= ~HIDPP_QUIRK_CLASS_WTP;
+		hidpp->quirks &= ~HIDPP_QUIRK_DELAYED_INIT;
+	}
+
 	if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP) {
 		ret = wtp_allocate(hdev, id);
 		if (ret)
-- 
2.3.3