Re: controlfb: please test!

Well, first of all, there are two different 'current' controlfb's.  One
of them is in the PPC 2.2 tree and the other in the 2.3 tree (both
bitkeeper), I believe.  Did you try both of those?  I'm pretty sure I
fixed this quite thoroughly in one or the other.

I admit (ashamedly) to not remembering which.

Actually, on closer look, I thought that the 2.3 code was correct.
Could you compare to Andrew's observations in the comment above the
code?  Is he wrong?  I certainly can't see how his comment would be
unless there is a memory scheme he was not detecting, and I do not
think there is.

I have a bunch of other patches to merge for controlfb anyway, so now
is a good time to straighten this out... with luck and speed we can get
a fix into 2.3.99preX.

On Sat, Mar 18, 2000 at 10:03:05AM +0100, Michel Lanners wrote:

Hi list,

You may remeber my problems (and the many other problems reported over
the years ;-) with controlfb's detection of the amount of VRAM
installed.

Well, it seems control has some bugs, which makes detection less easy,
and until now, only one of two possible schemes for the memory layout
was correctly detected.

Well, I think it's time to clean this mess up, so I want _all_
developers with any machine that has the control hardware
(PowerMacs 7300, 7500, 7600, 8500, 8600, clones?) to try the following
patch on a 2.3 kernel, and report the results to me.

Mine look like this, with 2 MB in bank2:
....
control: mem at 0x000000: no
control: mem at 0x200000: no
control: mem at 0x400000: no
control: mem at 0x600000: yes
controlfb: Memory bank 1 absent, bank 2 present, total VRAM 2MB
....

Please include yur VRAM configuration, and if you have the time, please
try all possible combinations (2MB in either bank1 or bank2, and 4MB).

Dan

/--------------------------------\  /--------------------------------\
|       Daniel Jacobowitz        |__|        SCS Class of 2002       |
|   Debian GNU/Linux Developer    __    Carnegie Mellon University   |
|         dan@debian.org         |  |       dmj+@andrew.cmu.edu      |
\--------------------------------/  \--------------------------------/

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