Re: [F]Framebuffer driver using SM501 hardware.

Hi, Andrey!

It would be great to have our code collected somewhere in a public
cvs/git archive.
There are also some patches to add (accelerated) SM501 support to 
the latest X somewhere in atmosphere:

https://bugs.freedesktop.org/attachment.cgi?id=1775

I will be able to help you with some hacking/testing with the
SM501 on PCI on ppc/MPC8540 in the future.

Greets,

Clemens Koller
_______________________________
R&D Imaging Devices
Anagramm GmbH
Rupert-Mayer-Str. 45/1
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Germany

http://www.anagramm.de
Phone: +49-89-741518-50
Fax: +49-89-741518-19



Andrey Volkov wrote:

I (now :)) working on it too.

Unfortunately, due to terrible SM docos/examples,
I rewrite/write some parts from scratch :(
(mainly based on Applied Data Systems drivers for PXA).
Currently my driver(s) in prerelease stage. It provide:

- PCI/bus infra.
- CRT or LCD fb (dual head in progress,
  I hope, on next week it will be done).
- hwd cursor
- hwd accel (bitblit/fill rect/color expand)
- I2C/DDC (software, due to silicon bug in SM501)
- CI (Command List Interpreter) partially supported
  (problems in PCI mode: when it work as master with
   MPC5200, some data are lost, needed investigation).

Todo:
- 16 bpp colormap (needed reverse endian support in fbcon/fbmem)
- Alpha (have not ideas how to use it in fb/X)
- Video (same as above)
- Platform driver (it will not too hard to write it,
  but all boards, which I have, are PCI based)
- USB host (in progress)
- USB slave
- Full CI support.
- UART/SPI/AC97....

To whom it is interesting, I could send my current code
(not too little). And, if smb will wish fix/expand...,
I could (temporally) create cvs on sf.net.

Wolfgang Denk wrote:

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In message [ref] you wrote:

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I was working with the SM501 framebuffer for a while on
linux-2.6.

...and we did in the context of our 2.4 kernel.

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There is a color-mapping issue left (RGB is swapped on powerpc)
and it needs lots of code cleanup or a complete rewrite.

I think we fixed some of these problems, and I have a couple of other
patches sitting in my queue. Anybody interested can (1) have  a  look
at our tree and (2) mail me.

Best regards,

Wolfgang Denk

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In message [ref] you wrote:

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I am writing framebuffer driver using SM501. This graphics driver chip can

Why are you re-inventing the wheel?

Because I (for ex.) don't use nor QT, nor X :) and I use 2.6 kernel.
Also I need USB/AC97... support.