[Intel-gfx] [PATCH] drm/i915: Handle sync_seqno correctly when seqno has wrapped.

[Ben Widawsky]

On Mon, 19 Nov 2012 12:55:22 +0200
Mika Kuoppala <mika.kuoppala at linux.intel.com> wrote:

> 
> On Tue, 13 Nov 2012 08:39:26 -0800, Ben Widawsky <ben at bwidawsk.net> wrote:
> > Can you add another patch on top of this to have the starting seqno be a
> > near pre-wrap value so we can catch bugs even without igt.
> 
> I tried that but failed. I suspect that there is something in hw/sw
> that doesn't like if first seqno is >0x80000000. Something in hw needs
> to initialized explicitly if seqno is not starting from 1?
> 

Nothing that I am aware of. If you have the first be 0, and then add a
huge jump right after that, does it work?

-- 
Ben Widawsky, Intel Open Source Technology Center