part deux Re: Radeon 7000 in 9500 - which slot?

[Benjamin Herrenschmidt]

>It is not detecting the heads properly because on many "mac" radeons, the
>firmware doesn't initialize the SCRATCH registers properly which contain
>information about display type.  There is no reliable method of probing
>display type on ppc so I will end up adding a display type option to
>radeonfb next version.

Well... It should be possible to get that info from OF properties
or is the OF driver broken enough to not export that either ?

How does the MacOS driver to probe displays ? Isn't it possible
to just try the various i2c channels until an EDID is found to
figure what's up ? The CRT port can definitely probe for the
presence of the display by measuring the load on the analog
outputs.

Ben.


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