[Intel-gfx] pipe control notify removed?
zhenyuw at linux.intel.com
Thu Dec 16 02:59:55 CET 2010
On 2010.12.15 10:05:01 +0000, Chris Wilson wrote:
> On Wed, 15 Dec 2010 11:14:53 +0800, Zhenyu Wang <zhenyuw at linux.intel.com> wrote:
> > Chris, just notice you removed pipe control notify entirely on -next,
> > that seems wrong to me. In Ironlake time, we've seen interrupt stall issue
> > with user interrupt, and be warned user interrupt is deprecated, so we moved
> > on to use pipe control notify, although there's a workaround later covered
> > that's required on Ironlake. But it's stable finally. And for sandybridge,
> > there's no such workaround needed.
> The answer to this is to make sure that such details are kept in the
> code comments, especially if such information is not readily available
> in the documentation.
yeah, also our spec might not have been updated as well...I'll send the BUN
doc for that to you.
Open Source Technology Center, Intel ltd.
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