[Mesa-dev] [PATCH-RFC] i965: do not advertise MESA_FORMAT_Z_UNORM16 support

[Ian Romanick]

On 02/19/2014 03:03 PM, Kenneth Graunke wrote:
> Currently, all platforms have Z16 performance issues.  On Haswell and
> later, we could potentially implement the PMA stall optimization, which
> I believe would reduce(?) the problem.  I'm not sure if it would
> eliminate it though.
> 
> I think the best course of action is:
> 1. Fix the Piglit test to not require precise depth formats.
> 2. Disable Z16 on all generations.
> 3. Add a "to do" item for implementing the HSW+ PMA stall optimization.
> 4. Add a "to do" item for re-evaluating Z16 on HSW+ once that's done.

I didn't realize all platforms had Z16 issues.  I thought it was just
HiZ platforms (ILK+).  Sounds like a good plan to me.

> --Ken
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