Re: EDID for radeonfb

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Thu, 2003-08-21 at 22:51, Jon Smirl wrote:
> Is GregKH designing the EDID thorough sysfs scheme? I haven't seen a proposal
> on how it is going to work. We need to coordinate with that so that we don't
> end up with a different EDID scheme for every card.

Imho, the fbdev should be a separate device from the monitor:

fbdev -> fbmon -> EDID

The EDID should be a property of the monitor

So fbdev should instanciate a monitor object for each head after
detection. It's still unclear for me how to deal with the various
types of monitors though

 - EDID available
 - Mac old style "sense code" available
 - fixed mode known based on motherboard (old mac laptops among others,
   probably some embedded)
 - unknown

The EDID shall be used to build a modedb of available modes for this
display, the driver doing validation based on that, though a flag to
set_var would still be useful to force a mode that doesn't pass
validation (EDIDs can be wrong...)


Ben.



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