RE: [linux-fbdev] Re: macmodes/modedb

-----Original Message-----
From: Geert Uytterhoeven [mailto:Geert.Uytterhoeven@sonycom.com]

quoted

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You cannot do everything in fb_find_mode() since monitor sense is
a per-monitor issue, not global.

As of now, all drivers have a 1:1 relationship with a monitor.  Even the
Matrox G400 driver insmods a second driver for the 2nd head.  Should we
expect this to change?  I do not believe fbdev is capable of

initializing

quoted

two video cards from a single driver, but I could be wrong -- I have no
ability to test.

Yes it is. There are drivers that can handle multiple cards. And you can

have

different cards as well.

I'm not totally sure what I was thinking when I wrote that.  Ani added
support into the aty128 driver that at least allowed detection of multiple
cards of the same class.  I guess what I wasn't sure of was if the
underlying system could handle it.

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One possible thing (in each fbdev driver :-(

    default_mode = NULL;
#ifdef CONFIG_PPC_ALL
    sense = ...;
    default_mode = mac_map_monitor_sense(sense);
#endif
    ... = fb_find_mode(..., default_mode, ...);

So I'm assuming that this is the route to go until we/I have more detail on
DDC?

In the end, I think that an addition to fb_ops would be appropriate.

I see that DDC is supported in X4.  Are there any legal reasons why I
couldn't just "figure it out" from the X code?  $350 USD seems a bit steep
to find out how an industry standard works...

Brad Douglas
brad@neruo.com
http://www.linux-fbdev.org

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