Dependency between Xorg and VideoBIOS

[Adam Jackson]

On Mon, 2008-07-14 at 15:45 +0200, Eduard Fuchs wrote:
> Hello,
> 
> Currently, I have a PowerPC embedded system with PCI Radeon 9200 PRO 
> graphic card (RV280) on it. At first, the Linux Kernel runs the 
> VideoBIOS during x86emu and init the PCI-card. After this, the kernel 
> radeonfb and the radeon driver from Xorg work very well.
> 
> Now we are making board redesign with new on-board graphic chip. Our 
> choice is ATI E2400, unfortunately without VideoBIOS. The question is - 
> how deep depends the Xorg on Video-BIOS?
> 
> We want try to init the E2400 during system boot (in u-boot or later in 
> linux kernel) thru pushing some init values in the chip's registers.
> 
> Where can I find some more information about this problem?

X only depends on the BIOS in the sense that it depends on something to
initialize, or have initialized, the card.  If you can init the card
enough in uboot or the kernel to get a framebuffer up, then X should be
able to run on it.

- ajax