Re: [Linux-fbdev-devel] (no subject)

[Robert S. <ro...@sc...>]

Hello James,

On Tue, 13 Nov 2001, James Simmons wrote:
> As some of you know I have been working on a new console system for
> 2.5.X.

This might be a good opportunity to throw in some remarks from the
embedded front. I currently have the problem that I would like to attach a
Displaytech 64128a LCD to an embedded machine running Linux. The problem
with these displays is that they have their own controller which is
accessable through an 8 bit parallel port and some control lines, so it
does not have any memory mappable frame buffer.

Nevertheless, it would be great to write a framebuffer driver for that
beast, because then I could use all kinds of "normal" libraries ontop of
that device, e.g. svgalib, Qt-Embedded, MicroWindows or whatsoever. I'm no
expert in the current FB interface, but it looks to me that there is no
mechanism for devices like that. I can imagine to write something like the
virtual vfb driver, but there is still a mechanism missing that can be
used to tell the driver that the frame is "dirty" and it has to be
transferred by the driver into the display.

Any ideas how this could be done, either with the existing interface or
with possible improvements in the new API are welcome.

Robert
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