On Sat, 4 May 2002, José Fonseca wrote:
> On 2002.05.04 11:35 Peter Andersson wrote:
> > José Fonseca wrote:
> >> ...
> >>
> >> Peter, this is a regression. There may be two causes for this:
> >>
> >> a) The use of readl/writel somehow poses even further problems.
> >>
> >> b) Recent changes on the CVS broke PowerPC. It may be just the
> >> wait_for_{idle,fifo} already failed before, but it passed unoticed
> >> before the recentely added checks.
> >>
> >> The only way to figure this out is to reverse the use of the
> >> readl/writel macros and see if this changes anything. So Peter, in
> >> mach64_drv.h, instead of:
> >>
> >> #define MACH64_READ(reg) readl(MACH64_ADDR(reg))
> >> #define MACH64_WRITE(reg,val) writel((val), MACH64_ADDR(reg))
> >>
> >> put back:
> >>
> >> #define MACH64_DEREF(reg) *(volatile u32 *)MACH64_ADDR(reg)
> >> #define MACH64_READ(reg) le32_to_cpu(MACH64_DEREF(reg))
> >> #define MACH64_WRITE(reg,val) do { MACH64_DEREF(reg) =
> >> cpu_to_le32(val); } while (0)
> >>
> >> (note that each definition takes a whole line, just in case it gets
> >> broken by the mailer)
> >>
> >> and check both with MACH64_USE_DMA set to 1 and 0.
> >
> > I have tried these changes and it didn´t work with either MACH64_USE_DMA
> > set to 1 or 0, i still get "Error flushing vertex buffer: return = -16".
> >
> > Peter
> >
>
> Thanks. This means that the problem was the recent CVS changes. As said
> before, this timeout could be there before, but just now (that a check was
> added) it manifested. I'll look into the changes and see what can be going
> wrong.
>
> José Fonseca
>
Actually, if I remember correctly, Peter only had MMIO working before by
changing wait_for_fifo to wait_for_idle, so it's only a regression if that
doesn't work.
Peter can you change mach64_state.c, line 538 from
if ( mach64_do_wait_for_fifo( dev_priv, 16 ) < 0 )
to
if ( mach64_do_wait_for_idle( dev_priv ) < 0 )
and set MACH64_USE_DMA to 0.
As far as DMA goes however, that was working before (just slowly), right?
So we do have a regression there.
--
Leif Delgass
http://www.retinalburn.net
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