fbdev: tdfxfb: Attempt to detect if the card wasn't booted

Until now a card had to have been booted by its video BIOS
otherwise the driver would probe, create the fb etc but there
would be no output on the display.

There doesn't seem to be a documented way work out if the BIOS
ran or not. Checking if the values in registers match what is
in the config table in the BIOS seems to be the only option.

On my 16MB Voodoo 3 3000 checking the contents of the draminit0
register versus what is in the config table seems to be enough.

Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Helge Deller <deller@gmx.de>

0 files changed, 0 insertions, 0 deletions