On Mon, Jun 16, 2003 at 11:35:03PM -0300, Maximo wrote:
> At 02:38 PM 15/6/2003, Jos� Fonseca wrote:
> >>         I also noticed in the savage DRM there is a "BCI Initialization"
> >> that there isn't in the others modules of other devices, what exactaly is
> >> that?
> >
> >Please read the archives about it (it's just :
> >
> >  http://marc.theaimsgroup.com/?l=dri-devel&w=2&r=1&s=Savage+BCI&q=b
> >
> >Especially this one:
> >
> >  http://marc.theaimsgroup.com/?l=dri-devel&m=104686586219373&w=2
> >
> >but also give a quick look to the others there since they're no so many.
> >
> 
>         Those links made things a little more clear but i'm still having a 
> lot of difficulties to understand the whole thing. I know that it will be a 
> very difficult task for me but i don't intend to give up.
> 
>         Reading the archives I notice that Andreas was working on "wait 
> for idle". Do you know if he finished that? What should be the next step?

Since savage_bci.c doesn't have it, I conclude he didn't. IIRC what
Andreas said at the time, the problem is that this function depends on
the actual version of the Savage chipset family, so it's not a simple
cut'n'paste from the XFree86 2D driver.

After that, the next step would be create a function to write a buffer
to the BCI and the respective ioctl (to be called by the libGL driver
or, first, a test program).

>         I think you already noticed but i'm not really familiar with all 
> these terms like: MMIO, PIO, SEARS etc. I already read the faq but i think 
> i didn't get the whole idea. I would really appreciate if you could give me 
> some help with that.

Have you noticed the explanations in the FAQ?:

  http://dri.sourceforge.net/doc/faq/glossary.html#MMIO-TERM
  http://dri.sourceforge.net/doc/faq/glossary.html#PIO-TERM
  http://dri.sourceforge.net/doc/faq/architecture.html#SAREA-DEFINITION

They may not be totally clear. (*) Tell me if you'r still not completely
enlightened about them or what other terms are confusing.


Jos� Fonseca


(*) I'm flagging all my answers to you to add/update the FAQ aftewards.


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