From: Tomas Berndtsson <[EMAIL PROTECTED]>
Date: 14 Dec 1999 18:22:15 +0100
I forward this to the sparclinux list too. :)
At least I have to use that offset in oFBis to mmap the display on the
cgsix. I got the values from the XSun X server. I can't try fbtv right
now.
Maybe this is a bug in the sparc kernel?
The existing mmap semantics of SBUS/Sparc framebuffers, as used by all
existing Sun framebuffer support in the X server and elsewhere, is the
interface we provide for SBUS framebuffers. And these use /dev/fb.
These semantics were around long before GGI was even conceived. If
you want to support Sun framebuffers in GGI you will need to mmap them
just as we do in the Sparc X server code. We are not going to break
all of our existing X servers and other support code just to adhere to
these supposed /dev/fb rules.
As for resolution changing, you currently get one resolution and that
is it. Users can change the resolution to get a different console
layout or what X gives them via OpenPROM variable setting from the
boot firmware command-line. F.e. on my Creator3D + Sony 24"
wide-aspect monitor I say:
ok setenv display screen:r1920x1200x70
And it just works.
We may implement resolution changing at some time, but my personal
feeling is that letting the boot firmware take care of this was
one of the nicest blessings for our X server support, the user
doesn't need to specify magic video timing mode lines etc. for Sun
video cards.
Later,
David S. Miller
[EMAIL PROTECTED]
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