linux-kernel - Re: [Linuxwacom-devel] [PATCH 06/15] Input - wacom: install LED/OLED sysfs files in the HID device instead of USB

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Date:	Thu, 03 Jul 2014 09:21:43 +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>,
	linuxwacom-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: [Linuxwacom-devel] [PATCH 06/15] Input - wacom: install
 LED/OLED sysfs files in the HID device instead of USB


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

> Removes one more dependency over USB, but requires some changes in
> the user space to find the sysfs files correctly.
>
> This patch breaks the user space. However, the number of program
> accessing the LEDs is quite limited and we can easily patch them
> to handle the new HID behavior.
[..]
Hi Bejnamin,
If you get the green light to break the user space we might as well  
think about getting it in line with led/oled over bluetooth (intuos4  
wireless) or the other way around.

The biggest user of led/oled functionality is gnome and there are also  
a few small projects that would stop working after that change. I can  
fix i4oled project easily, i4oled-gui is based on gnome handling oleds.

Patching those 2 should be enough to fix gnome:
https://git.gnome.org/browse/gnome-settings-daemon/tree/plugins/wacom/gsd-wacom-led-helper.c
https://git.gnome.org/browse/gnome-settings-daemon/tree/plugins/wacom/gsd-wacom-oled-helper.c

Regards,
Przemo Firszt


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