Re: [Linux-fbdev-devel] Reading the EDID block for x86 machines

[<sy...@sc...>]

On Tue, Mar 11, 2003 at 08:49:46PM +0800, Antonino Daplas wrote:
> Hi,
>=20
> I was wondering how to get the EDID block, and my first thought was to
> implement DDC.  But it is tricky to implement,

Forgive my ignorance but why is it tricky? As I understand it DDC1 only
involves reading from the monitor or does EDID require something more?

Reading stuff from my monitor via /dev/i2c works fine with matroxfb. I
just tried this and I can see my monitors model in the returned data but
parse-edid doesn't understand the data so I'm not sure it's the EDID.

Also the BIOS solution will fail when someone decides to change their
monitor. This got me thinking that with a real DDC solution would it be
feasible to have the driver re-read the EDID periodically and/or on mode
switch to prevent using bad modes?

--=20
Ville Syrj=E4l=E4
sy...@sc...
http://www.sci.fi/~syrjala/