[SRU[[Trusty] Synaptics HID touchpad driver

[AceLan Kao]

Hi,

Current situation is that without this patch, the touchpad doesn't
work, so there should be no regression that could happen.
Synaptics touchpad chip will disable ps/2 interface when someone
negotiates with it through i2c interface.
The regression happened before is that it doesn't distinguish the
Synaptics touchscreen IDs from touchpad IDs, so it leads to the
touchscreen malfunction when the i2c driver is loaded earlier than
hid-multitouch.

Read the comment #71
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1305522/comments/71
The output of xinput command lists the mixed ps/2 and i2c(DLL05E3)
devices, I think it doesn't affect anything, for psmouse has failed to
be loaded.
   [ 2.497722] psmouse serio1: synaptics: Unable to query device.
   [ 7.840665] psmouse serio1: Failed to enable mouse on isa0060/serio1
On my Dell laptop with i2c touchpad, the psmouse is loaded, but it
doesn't appear in xinput, I'm not sure where the problem results from,
but it won't lead to any regression, at least, didn't hear from
launchpad.

Best regards,
AceLan Kao.

2014-06-17 20:17 GMT+08:00 Stefan Bader <stefan.bader at canonical.com>:
> All patches appear to be cherry picks. Most changes only for the new driver and
> the some changes of the first patch get reverted by the last one.
> The worry I have is that this seems to make usb and i2c synaptics devices use
> the new driver and the feedback in the bug report seems mixed. Are you confident
> this is not introducing regressions in some cases?
>
> -Stefan
>
>
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