Re: radeon DST_LINE

[Jerome G. <j.g...@gm...>]

On 6/18/05, Adam Jackson <aj...@nw...> wrote:
> On Saturday 18 June 2005 13:38, Jerome Glisse wrote:
> > On 6/18/05, Vladimir Dergachev <vo...@mi...> wrote:
> > > On Sat, 18 Jun 2005, Jerome Glisse wrote:
> > > > DST_LINE_START  0x1600
> > > > DST_LINE_END 0x1604
> > > > (from radeon fb)
> > >
> > > From the name, I guess that they initiate line drawing in 2d engine.
> >
> > I think it's more than that...but i maybe wrong, depending on value i p=
ut
> > in it the lockup on 9800 can take a bit much time to appear...i haven't
> > done statistic on that an thus i could be a feel more than a true a
> > reality...
>=20
> The DDX uses them for the start and end coordinates of Bresenham lines.  =
I
> have trouble believing they could be anything else.

Yes it's unrevelent reg for the lockup it was just changing value
of a related reg 0x16a0, after hours of writting random things in
random place my judgement on the importance of reg is severely
impaired...

Wonder if the difference we saw after fglrx run isn't due to a
packet send to the engine and not to a memory mapped reg...

Jerome Glisse