RE: [PATCH] Input: elan_i2c - +200 ms delay before setting to ABS mode

From: ååæ
Date: Wed Jun 22 2016 - 08:01:17 EST

-----Original Message-----
From: Daniel Drake [mailto:drake@xxxxxxxxxxxx]
Sent: Tuesday, June 21, 2016 10:42 PM
To: ååæ
Cc: Dmitry Torokhov; Chris Chiu; Charlie Mooney; Michele Curti; Krzysztof Kozlowski; Benson Leung; linux-input@xxxxxxxxxxxxxxx; Linux Kernel; Linux Upstreaming Team; éäé çç
Subject: Re: [PATCH] Input: elan_i2c - +200 ms delay before setting to ABS mode

On Tue, Jun 21, 2016 at 6:40 AM, ååæ <kt.liao@xxxxxxxxxx> wrote:
> KT, is this feasible?
> [KT] After internal discussion, we don't agree this patch.
> It's a work-around to fix firmware bug for specific touchpad and
> not tested by other device.

For better or worse, Linux often takes on the responsibility of working around firmware bugs. This is a real issue that affects multiple Asus laptops; you'll have no touchpad input upon reboot from any OS that drives the touchpad in "generic hid" mode (e.g. older version of Linux, some embedded OS, etc).

If the sleep is really that controversial, we could make it specific to the ELAN1000 model that is the one in question here?

[KT]:We can consider to control specific module, our FW engineer is checking it and confirm which part number for ASUS should adopt work-around.
we will reply you once we confirm.