The Logitech Casa Touchpad does not reliably send touch release signals
when communicating through the Logitech Bolt wireless-to-USB receiver.

Adjusting the device class to add MT_QUIRK_NOT_SEEN_MEANS_UP to make
sure that no touches become stuck, MT_QUIRK_FORCE_MULTI_INPUT is not
needed, but harmless.

Linux does not have information on which devices are connected to the
Bolt receiver, so we have to enable this for the entire device.

Signed-off-by: Kenneth Albanowski <kenalba@chromium.org>
---
 drivers/hid/hid-ids.h        | 1 +
 drivers/hid/hid-multitouch.c | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 86820a3d9766..ff3c17f76aa2 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -868,6 +868,7 @@
 #define USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1	0xc539
 #define USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1_1	0xc53f
 #define USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_POWERPLAY	0xc53a
+#define USB_DEVICE_ID_LOGITECH_BOLT_RECEIVER	0xc548
 #define USB_DEVICE_ID_SPACETRAVELLER	0xc623
 #define USB_DEVICE_ID_SPACENAVIGATOR	0xc626
 #define USB_DEVICE_ID_DINOVO_DESKTOP	0xc704
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 638e36c6d0f1..481d2b798633 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -2137,6 +2137,10 @@ static const struct hid_device_id mt_devices[] = {
 		HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH_WIN_8,
 			USB_VENDOR_ID_LOGITECH,
 			USB_DEVICE_ID_LOGITECH_CASA_TOUCHPAD) },
+	{ .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
+		HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
+			USB_VENDOR_ID_LOGITECH,
+			USB_DEVICE_ID_LOGITECH_BOLT_RECEIVER) },
 
 	/* MosArt panels */
 	{ .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
-- 
2.46.1.824.gd892dcdcdd-goog

On Fri, 4 Oct 2024, Kenneth Albanowski wrote:

> The Logitech Casa Touchpad does not reliably send touch release signals
> when communicating through the Logitech Bolt wireless-to-USB receiver.
> 
> Adjusting the device class to add MT_QUIRK_NOT_SEEN_MEANS_UP to make
> sure that no touches become stuck, MT_QUIRK_FORCE_MULTI_INPUT is not
> needed, but harmless.
> 
> Linux does not have information on which devices are connected to the
> Bolt receiver, so we have to enable this for the entire device.
> 
> Signed-off-by: Kenneth Albanowski <kenalba@chromium.org>

Applied, thanks.

-- 
Jiri Kosina
SUSE Labs