linux-kernel - Re: [PATCH] platform/x86: ideapad-laptop: Add sysfs interface for touchpad state

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Message-ID: <1487411495.13283.3.camel@debian.org>
Date:   Sat, 18 Feb 2017 15:21:35 +0530
From:   Ritesh Raj Sarraf <rrs@...ian.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Darren Hart <dvhart@...radead.org>,
        Rafael Wysocki <rjw@...ysocki.net>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Ike Panhc <ike.pan@...onical.com>,
        Andy Shevchenko <andy@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] platform/x86: ideapad-laptop: Add sysfs interface for
 touchpad state

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Hello Dmitry,

On Fri, 2017-02-17 at 11:52 -0800, Dmitry Torokhov wrote:
> OK, if firmware disables the touchpad automatically, then it is fine.
> 
> I am wondering about the utility of the new interface though. Are there
> already major users of it? 

Not yet. I proposed this interface because we want something like this for
Onboard. For detailed discussion, please see:
https://bugs.launchpad.net/onboard/+bug/1366421/comments/43

hp-wmi and thinkpad-acpi do provide a similar interface, but for tablet.


> If there are no users, then there is no point
> in adding it, it will stay there unused and forgotten by anyone.
> Teaching ideapad to emit SW_TABLET_MODE is more useful IMO.

If accepted, Onboard will be a consumer.

Yes. SW_TABLET_MODE would be ideal. But looking at the drive's code, I don't
know if it has an EC command for it.

- -- 
Ritesh Raj Sarraf | http://people.debian.org/~rrs
Debian - The Universal Operating System
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