On 1/13/07, Phillip Ezolt <[EMAIL PROTECTED]> wrote:
> Michel,
>
> On 1/12/07, Michel Dänzer <[EMAIL PROTECTED]> wrote:
> >
> >
> >
> > > 4) Is there a simple command that I can issue to the CP to clear the
> > > screen JUST to see if it is issuing any commands from the ring buffer
> > > at all?
> >
> > You could do something along the lines of radeon_test_writeback: write
> > to a scratch register via the CP and verify by reading the register
> > directly. Actually, doing something like that from radeon_do_init_cp and
> > returning an error if it fails might generally help to handle CP
> > initialization issues more gracefully.
>
> Do you have any idea what that command stream would look like?
>
> Is it something like this:
>
> BEGIN_RING(2);
> OUT_RING( CP_PACKET0( RADEON_SCRATCH_REG5, 0 ) );        \
> OUT_RING( 0xDEADBEEF);                           \
> ADVANCE_RING()
> COMMIT_RING()

Should be do the work, then you read the scratch reg via MMIO to see
if the value was set.

> > > 1) The fglrx driver never sets the (RADEON_CP_RB_RPTR_ADDR) register.
> > > If I read the register back when fglrx is running, it is set to "0".
> > >
> > > What does that register indicate?
> >
> > You can ignore scratch register writeback for now. You may want to load
> > the radeon kernel module with no_wb=1 though to prevent the unlikely
> > event that it intervenes with anything.
>
> Ok.  I'll try that.
> ...
> BTW. I have some code (based on bitfield) which automatically decodes the
> register traces from libsegfault, and gives me the names of the regs and the
> fields.  It makes reading the trace much easier.
>
> Is there some place I can put that on the freedesktop servers?

I don't think there is any place for this except user account, you
could send it to me and i will put it in mine.

best,
Jerome Glisse

-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys - and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
--
_______________________________________________
Dri-devel mailing list
Dri-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/dri-devel

Reply via email to