The Logitech MX Master 4 can be connected over bluetooth or through a
Logitech Bolt receiver. This change adds support for non-standard HID
features, such as high resolution scrolling when the mouse is connected
over bluetooth.
Because no Logitech Bolt receiver driver exists yet those features
won't be available when the mouse is connected through the receiver.

Signed-off-by: Adrian Freund <adrian@freund.io>
---
 drivers/hid/hid-logitech-hidpp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index d40932809ce1..cf07660bd85b 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -4668,6 +4668,8 @@ static const struct hid_device_id hidpp_devices[] = {
 	  HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb038) },
 	{ /* Slim Solar+ K980 Keyboard over Bluetooth */
 	  HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb391) },
+	{ /* MX Master 4 mouse over Bluetooth */
+	  HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb042) },
 	{}
 };
 
-- 
2.53.0

On Wed, 11 Mar 2026, Adrian Freund wrote:

> The Logitech MX Master 4 can be connected over bluetooth or through a
> Logitech Bolt receiver. This change adds support for non-standard HID
> features, such as high resolution scrolling when the mouse is connected
> over bluetooth.
> Because no Logitech Bolt receiver driver exists yet those features
> won't be available when the mouse is connected through the receiver.
> 
> Signed-off-by: Adrian Freund <adrian@freund.io>

Applied to hid.git#for-7.0/upstream-fixes, thanks.

-- 
Jiri Kosina
SUSE Labs