Dave & Roland,

On 4/9/07, Roland Scheidegger <[EMAIL PROTECTED]> wrote:

Dave Airlie wrote:
> Okay the GART is working fine on the rs480 from my branch,


 Congratulations on getting it to work.   I've tested your DRM branch on my
HP laptop with a 200M, and it works.  (128M of video RAM, 0 sideport RAM.)
X starts up with a nice stipple pattern, and gears hangs in the same way you
described in your blog.

(Damn. I was so close, I had 4 or 5 proper startups with my hacked/reverse
engineered code, but I couldn't figure out how to make it happen reliably.
I didn't read RADEON_IGPGART_UNK_38 before I wrote it..  Maybe that was the
problem.)

BTW.  Base on the back traces I gathered when running kmmio, I think that
the following defines should be renamed:

RADEON_IGPGART_UNK_2E -> RADEON_IGPGART_FLUSH
RADEON_IGPGART_UNK_38 -> RADEON_IGPGART_ENABLE

(More details at: http://dri.freedesktop.org/wiki/Radeon200M)

however the
> r300 driver causes a chip lockup, I've loaded fglrx and from what I can
> see it disables the Vertex Shaders in hw and does that bit of the
pipeline
> in sw.. at least on the system I have...
>
> If anyone else has an xpress 200 or 200m, perhaps they could try fglrx
and
> run a GL app and find out what the value in reg 0x2140 is, the latest
> version of radeontool from my git repo will do it..[1]
> radeontool regmatch SE_CNTL_STATUS
>


I'll check out that register tonight.

I think the bit that turns on/off the Vertex stuff is the same bit that
> used to turn on/off the TCL engine..
>
> I'm not sure how we can handle this in r300, we probably need to use a
> swtcl path for these chips....
>
> Dave.
I thought the r300 driver could already handle tcl fallbacks. It's not
news that the xpress chips don't have any hw tcl/vertex shaders, that
has been known forever and is afaik officially confirmed (the screen
code doesn't set the RADEON_CHIPSET_TCL bit for these chips for a
reason). The same is still true for rs690, btw.

Roland


What has to be done now?  Where can look to start hacking Mesa to support
it? (I've spent all of my time so far in DRM.. (radeon_cp.c) )

Cheers,
--Phil
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