DFP support for kernel radeonfb.c added

Daniel Berlin dan at cgsoftware.com
Thu Nov 15 06:04:46 EST 2001

On Wed, 14 Nov 2001, Kevin B. Hendricks wrote:

> Hi Daniel,
> On November 14, 2001 01:20, Daniel Berlin wrote:
> > Just a note, on the tibook rev b, the EDID is in EDID1 for the LCD.
> > No idea if it'll make an EDID2/EDID if you plug in an external monitor.
> Arrgghh!  Okay, I guess knowing the name of the OF EDID block is not going
> to be easy!
> My tree has both "DFP,EDID", and "LCD,DFP" so my code only looks for:
> and
> I will add "EDID1" also (and "EDID2") just to make sure nothing breaks
> along the way.
> Ben is correct here, perhaps we should do our own I2C to grab our own EDID
> block directly from the monitor and not play the "what name did OF give
> it" game.
The problem is that i can't seem to get this to work on the tibook2.
Strangely, osx appears to do it.

I'll bet it's bios rom related or something.
> I have not looked at the I2C code to see how complex it is.  Does anyone
> have any working code or sample code I can look at?
Yes, I do.

At least, i have code that *should* work. I can't test it, of course.

Want it?
> Thanks,
> Kevin

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