linux-kernel - Re: [PATCH] Input - wacom: update the ABI doc according to latest changes

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Date:	Tue, 05 Aug 2014 15:53:22 +0000
From:	Przemo Firszt <przemo@...szt.eu>
To:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Ping Cheng <pinglinux@...il.com>,
	Jason Gerecke <killertofu@...il.com>,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: [PATCH] Input - wacom: update the ABI doc according to latest
 changes


Quoting Benjamin Tissoires <benjamin.tissoires@...hat.com>:

> Now the devices show up under hid no matter the connection. So update the
> sysfs path to the shortest and common one.
> The ABI has also been unified regarding the OLEDs, but Bluetooth handle
> only 1-bit images instead of 4.
>
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> ---
>
> Guys,
>
> by updating this and working on the g-s-d client side for OLEDs, I think now
> that we should also keep the oled*_img for Bluetooth and implement this file
> for USB too. The user space code gets messy quite fast due to the need to
> support old and new kernels, whereas if we handle the scrambling in  
> the kernel,
> it should be quite straightforward.
> Of course, we have to keep the current button<n>_rawimg for backward
> compatibility.
[..]
Hi Benjamin,
For whatever it's worth, you have my vote for scrambling for usb/bt in  
the kernel.
I'm not sure about requirement for backward compatibility (the user space will
be broken anyway).

I proposed it a while ago [1]

[1] http://www.gossamer-threads.com/lists/linux/kernel/1593583

Regards,
Przemo Firszt

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