On 2002.04.30 13:41 Felix K�hling wrote:
> Hi,
>
> I tried DMA on the mach64-0-0-4-branch now. All the gl application seem
> to work fine. But after switching to another console and back (without
> running a gl app at the same time:) the gl app's window is just black
> after starting it, full CPU load in the kernel and the X-server reacts
> very slowly. I get the following kind of messages in/var/log/kern.log
> repeatedly (about one of these blocks per second):
>
> Apr 30 14:24:19 viking kernel: [drm] failed! GUI_STAT=0x02000001
> Apr 30 14:24:19 viking kernel: [drm] mach64_do_wait_for_idle failed
> Apr 30 14:24:19 viking kernel: [drm] resetting engine ...
This is odd. The card never gets idle but X keeps working so the card is
not locked.
We really need to add variable that indicated if DMA is working or not so
that we can fallback to MMIO when it fails.
I wonder if these different behaviours regarding the FIFO & DMA are
related to specific mach64 chip versions?
>
> I also wanted to try it without DMA. But just changing the #define
> MACH64_DMA in mach64_drv.h didn't trigger any recompiling. Is there
> something wrong with the dependencies?
>
Yep. You can't depend on dependencies. Verytime I mess in a header I do
make -f Makefile.linux clean mach64.o
> Regards,
> Felix
>
Jos� Fonseca
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