On Sun, 12 Mar 2000, James Simmons wrote:
> On PowerPC you have to build at least one of the fbdev drivers into the
> kernel in order to boot right. Just like filesystem support. If you don't
> select any filesystem then your machine will not boot. Actually a user
> could do that now on ix86 by unselecting vgacon and using fbcon with all
> driver modular. Vgacon has problems with fbcon as stated above. So I say
> we force people to choice between fbcon and vgacon. It just means like all
> the other platforms the user has to built at least one fbdev driver
> directly into the kernel. Makes sense to me.
That's not 100% true: you can leave out all frame buffer devices and insmod a
fbdev later. My Amiga is not PPC, but m68k, but since my modular amifb patch I
can wake up the video with `modprobe amifb'.
Of course this no longer works in 2.3.51 since the take_over_console() was
removed.
> > SGI Indy boxes don't use fbcon, but solely newportcon.
>
> >From arch/mips
>
> if [ "$CONFIG_VT" = "y" ]; then
> mainmenu_option next_comment
> comment 'Console drivers'
> if [ "$CONFIG_SGI_IP22" = "y" ]; then
> tristate 'SGI Newport Console support' CONFIG_SGI_NEWPORT_CONSOLE
> if [ "$CONFIG_SGI_NEWPORT_CONSOLE" != "y" ]; then
> define_bool CONFIG_DUMMY_CONSOLE y
> else
> define_bool CONFIG_FONT_8x16 y
> fi
> else
> if [ "$CONFIG_DECSTATION" != "y" ]; then
> bool 'VGA text console' CONFIG_VGA_CONSOLE
> fi
> bool 'Support for frame buffer devices' CONFIG_FB
> source drivers/video/Config.in
> fi
> endmenu
> fi
>
> This makes sense since several SGI workstations have PCI bus. You could
> place cheesy low end video cards in it (that puts shivers down my spine).
Wrong. CONFIG_FB is only allowed if CONFIG_DECSTATION == y. And there's no
support for a fbdev for DECstation yet in the MIPS CVS tree.
> > This is another problem: because in many cases the vgacon and the fbcon card
> > are the same device, there should be a possibility to ask vgacon to `release'
> > the card (and its resources) first. Replace `vgacon' with `offb' on
> > PowerMac/CHRP.
>
> The nice thing about offb is it's going from one fbcon driver to another.
> Thats not so bad.
There's still a resource magament problem, though.
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven ------------- Sony Software Development Center Europe (SDCE) Geert.Uytterhoeven@sonycom.com ------------------- Sint-Stevens-Woluwestraat 55 Voice +32-2-7248638 Fax +32-2-7262686 ---------------- B-1130 Brussels, Belgium- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Mar 15 2000 - 21:00:23 EST