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From:   "Rafael J. Wysocki" <rafael@kernel.org>
Date:   Wed, 7 Dec 2022 10:36:40 +0100
Message-ID: <CAJZ5v0ic+pm+NWD8g4O2MwQEvi+xuB-W9Wpd6c1RhprhoxuK1g@mail.gmail.com>
Subject: Re: [Regression] Logitech BT mouse unusable after commit 532223c8ac57
 (still in 6.1-rc8)
To:     Bastien Nocera <hadess@hadess.net>
Cc:     Jiri Kosina <jikos@kernel.org>,
        =?UTF-8?Q?Filipe_La=C3=ADns?= <lains@riseup.net>,
        Benjamin Tissoires <benjamin.tissoires@redhat.com>,
        linux-input@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Thorsten Leemhuis <regressions@leemhuis.info>
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On Wed, Dec 7, 2022 at 10:16 AM Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
>
> On Wednesday, December 7, 2022 10:04:43 AM CET Bastien Nocera wrote:
> > On Tue, 2022-12-06 at 15:58 +0100, Rafael J. Wysocki wrote:
> > > Bastien, Jiri,
> > >
> > > Commit 532223c8ac57 ("HID: logitech-hidpp: Enable HID++ for all the
> > > Logitech
> > > Bluetooth devices") caused my Logitech Bluetooth mouse to become
> > > unusable.
> > >
> > > Appended is the change I need to make it work again (note that adding
> > > the
> > > device ID to unhandled_hidpp_devices[] doesn't help, so there must be
> > > some
> > > significant enough difference in how the two cases are handled in the
> > > stack).
> > >
> > > Here's what I get in the log without the patch below:
> > >
> > > [   36.710574] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
> > > [   36.710592] Bluetooth: HIDP socket layer initialized
> > > [   36.724644] hid-generic 0005:046D:B016.0001: unknown main item tag
> > > 0x0
> > > [   36.725860] input: Bluetooth Mouse M336/M337/M535 Mouse as
> > > /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-
> > > 7:1.0/bluetooth/hci0/hci0:1/0005:046D:B016.0001/input/input14
> > > [   36.728036] input: Bluetooth Mouse M336/M337/M535 Consumer Control
> > > as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-
> > > 7:1.0/bluetooth/hci0/hci0:1/0005:046D:B016.0001/input/input15
> > > [   36.728823] input: Bluetooth Mouse M336/M337/M535 Keyboard as
> > > /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-
> > > 7:1.0/bluetooth/hci0/hci0:1/0005:046D:B016.0001/input/input18
> > > [   36.731550] hid-generic 0005:046D:B016.0001: input,hidraw0:
> > > BLUETOOTH HID v12.03 Mouse [Bluetooth Mouse M336/M337/M535] on
> > > 9c:b6:d0:96:8e:c8
> > > [   36.833039] logitech-hidpp-device 0005:046D:B016.0001: unknown
> > > main item tag 0x0
> > > [   36.999064] logitech-hidpp-device 0005:046D:B016.0001: Device not
> > > connected
> > >
> > > and here's what I get with it:
> > >
> > > [   43.642546] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
> > > [   43.642559] Bluetooth: HIDP socket layer initialized
> > > [   43.652898] hid-generic 0005:046D:B016.0001: unknown main item tag
> > > 0x0
> > > [   43.653833] input: Bluetooth Mouse M336/M337/M535 Mouse as
> > > /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-
> > > 7:1.0/bluetooth/hci0/hci0:1/0005:046D:B016.0001/input/input14
> > > [   43.655025] input: Bluetooth Mouse M336/M337/M535 Consumer Control
> > > as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-
> > > 7:1.0/bluetooth/hci0/hci0:1/0005:046D:B016.0001/input/input15
> > > [   43.655400] input: Bluetooth Mouse M336/M337/M535 Keyboard as
> > > /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-
> > > 7:1.0/bluetooth/hci0/hci0:1/0005:046D:B016.0001/input/input18
> > > [   43.657521] hid-generic 0005:046D:B016.0001: input,hidraw0:
> > > BLUETOOTH HID v12.03 Mouse [Bluetooth Mouse M336/M337/M535] on
> > > 9c:b6:d0:96:8e:c8
> > >
> > > The only difference seems to be that in the former case the logitech-
> > > hidpp
> > > driver tries to bind to the device, but I guess that is expected.
> >
> > There really shouldn't be that much difference between the 2 paths,
> > except that hid-logitech-hidpp.c will check that the device supports
> > HID++ in its report descriptors, and then start talking to it to check
> > whether it's connected.
> >
> > Maybe the device doesn't support HID++?
>
> Quite possibly.
>
> > Can you try running src/tools/hidpp-list-features from
> > https://github.com/cvuchener/hidpp on the hidraw device for the mouse?
>
> OK, I'll do that.

Well, I would if I had a binary.

Otherwise, I have cmake 3.17 which apparently is too old, sorry.