Re: [Dri-devel] Mach64: vt switching

[Manuel T. <man...@so...>]

El Vie 26 Oct 2001 22:11, Leif Delgass escribi=F3:
> Manuel, the hang when switching back from a vt to X with Quake running
> hangs both in fullscreen and windowed mode (other GL apps like gears d=
on't
> exhibit this problem, although there is initially some garbage at the =
top
> of the screen when returning to X).  I'm sure you're right that it has=
 to
> do with the locking (or lack thereof) in the enter/leaveVT.  And with =
that
> I'm heading out, I'll try to do some more investigation tommorow...

Well. I've written a pair of macros to interlock drm and Xdriver and use=
d it 
in all the accelerated access from the XDriver. I've also used the 
DRILock/DRIUnlock API to lock the ATILeaveVT and ATIEnterVT in the 
aticonsole.c file. After this, we cannot enable 2D accelerated rendering=
 yet, 
because the drm and mesa sides are not honouring this interlocking. This=
 
should be made when Frank has  the new DMA API finished, because the poi=
nts 
to lock will be less than now (I suppose that we only will need to lock =
the 
actual DMA transfers) because the DMAOUTREG is only going to append the 
register writes to a DMA buffer. So, I suppose that the EnterVT/LeaveVT =
bug 
is still here, because of a non locking DRM.

Anyway, I tried to reenable 2D acceleration and run gears. The engine lo=
cked 
after trying to close gears, but the cursor still worked.

My idea is updating the branch with this changes (still without reenabli=
ng 
the 2D acceleration) and Leif ones for the AGP corrections. Leif, I've 
(#ifdef)ed the AGP code as you told me, but I think that your host.def 
changes are good for the mach64 branch (disabling the Glide dependencies=
 and 
enabling builds of DRM drivers) and I plan update it too.

Another secondary issue: I'm still have a problem compiling the branch: =
The 
xf86cfg directory in programs/Xserver/hw/xfree86 needs a lot of shared 
libraries and I think that there is no need to build this utilities in t=
he 
DRI context. So, I'm also going to add another change to the host.def fi=
le:

-#define BuildXFree86ConfigTools YES
+#define BuildXFree86ConfigTools NO

In this way, the Imakefile in programs/Xserver/hw/xfree86 will disable t=
his 
tools build:
...
#if !BuildServersOnly || BuildXFree86ConfigTools
XF86CFGDIRS =3D xf86cfg xf86config
#endif
...

and we will need less libraries.

Finally, and to accelerate the build, the line:

#define XF86CardDrivers tdfx i810 mga ati glint vga

should be:

#define XF86CardDrivers ati

And perhaps:

#define XFree86CustomVersion "DRI trunk"

should be replaced by:

#define XFree86CustomVersion "DRI mach64 branch"


Do you agree ?