On Oct 01 2024, Dmitry Torokhov wrote:

On Tue, Oct 01, 2024 at 01:53:44AM -0700, Dmitry Torokhov wrote:

quoted

On Mon, Sep 30, 2024 at 05:59:01PM +0200, Benjamin Tissoires wrote:

quoted

Hi,

On Jul 04 2024, Binbin Zhou wrote:

quoted

This patch introduces a driver for the PixArt PS/2 touchpad, which
supports both clickpad and touchpad types.

At the same time, we extended the single data packet length to 16,
because according to the current PixArt hardware and FW design, we need
11 bytes/15 bytes to represent the complete three-finger/four-finger data.

Co-developed-by: Jon Xie <redacted>
Signed-off-by: Jon Xie <redacted>
Co-developed-by: Jay Lee <redacted>
Signed-off-by: Jay Lee <redacted>
Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>

It looks like this new driver made in v6.12-rc1 but is already breaking
other touchpads in fedora:

https://bugzilla.redhat.com/show_bug.cgi?id=2314756

The reported touchpads used to work properly but are now directed to use
the PixArt PS2 driver instead of the old one (I would say it should be
using Synaptics).

I haven't touched PS/2 in a long time, so it's going to be hard to
pinpoint the error from my side, but it seems that the new driver is a
little bit too greedy.

OK, I gonna revert it and hope PixArt folks will figure out less greedy
probing sequence (or maybe we need to push it down a few sports).

Although, as I am trying to read the referenced bug, one of the
reporters are saying that they touchpad is USB:

SysFS ID: /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0
ysFS BusID: 3-3:1.0
Hardware Class: unknown
Model: "Synaptics Unclassified device"
Hotplug: USB
Vendor: usb 0x06cb "Synaptics, Inc."

I guess this must be the fingerprint reader or some other synaptics
device.

In the 6.11 logs (now publicly available), we can see:
[    1.601507] psmouse serio1: trackpoint: Elan TrackPoint firmware: 0x92, buttons: 3/3
[    1.614026] input: TPPS/2 Elan TrackPoint as /devices/platform/i8042/serio1/input/input5
...
[    2.286700] input: ELAN0672:00 04F3:3187 Mouse as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-ELAN0672:00/0018:04F3:3187.0002/input/input7
[    2.286834] input: ELAN0672:00 04F3:3187 Touchpad as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-ELAN0672:00/0018:04F3:3187.0002/input/input9
[    2.286873] hid-generic 0018:04F3:3187.0002: input,hidraw1: I2C HID v1.00 Mouse [ELAN0672:00 04F3:3187] on i2c-ELAN0672:00
...
[    2.337123] input: ELAN0672:00 04F3:3187 Mouse as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-ELAN0672:00/0018:04F3:3187.0002/input/input10
[    2.337173] input: ELAN0672:00 04F3:3187 Touchpad as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-ELAN0672:00/0018:04F3:3187.0002/input/input12
[    2.337212] hid-multitouch 0018:04F3:3187.0002: input,hidraw1: I2C HID v1.00 Mouse [ELAN0672:00 04F3:3187] on i2c-ELAN0672:00


So the touchpad seems to have the PS/2 fallback, and then switches to
i2c-HID. However, with PixArt the PS/2 touchpad isn't initialized, and
doesn't answered to i2c-hid (or is too much initialized, not sure).

so I am not sure how PS/2 device would interfere with that.

Could you give me access to the attachments on the bug so I can take a
closer look? And hopefully the original reporter will submit their data.

Sure, done!

Cheers,
Benjamin