linux-kernel - Re: Future handling of complex RGB devices on Linux v2

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Date: Thu, 22 Feb 2024 18:52:40 +0100
From: Pavel Machek <pavel@....cz>
To: Hans de Goede <hdegoede@...hat.com>
Cc: Gregor Riepl <onitake@...il.com>,
	Werner Sembach <wse@...edocomputers.com>,
	Lee Jones <lee@...nel.org>, jikos@...nel.org,
	linux-kernel@...r.kernel.org, Jelle van der Waa <jelle@...aa.nl>,
	Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	linux-input@...r.kernel.org, ojeda@...nel.org,
	linux-leds@...r.kernel.org
Subject: Re: Future handling of complex RGB devices on Linux v2

Hi!

> For all these reasons the display analogy really is a bit fit for these keyboards
> we tried to come up with a universal coordinate system for these at the beginning
> of the thread and we failed ...

I quite liked the coordinate system proposal. I can propose this:

Vendor maps the keyboard lights to a grid. That would be something
16x8 for thinkpad X220. Then we provide functionality to query "is a
working pixel there" and "what kind of key is at this pixel" -- I
guess we can use input keycodes for that. Multiple pixels can map to
one keycode.

(And then we make best effort to map normal keyboards into similar
grids).

Best regards,
								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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