[Mesa-dev] [RFC] r600g: evergreen/cayman tessellation support

[Marek Olšák]

On Mon, Nov 30, 2015 at 7:20 AM, Dave Airlie <airlied at gmail.com> wrote:
> Hi,
>
> Patchbomb time, this set of patches is a first pass at add adding
> ARB_tessellation_shader support to the r600g driver. Only Evergreen
> and newer GPUs support tessellation. On any of the GPUs that support
> native FP64, this will enable OpenGL 4.1 on them.
>
> The first bunch of patches are a bit of a driver rework to get
> things in better shape for tessellation, they shouldn't cause
> any regressions.
>
> This runs heaven on cayman and should pass all the piglits
> unless I've done something wrong.
>
> Development hit two HW programming fun times, one with tess and
> dynamic GPR interaction requiring disabling dynamic GPRs, and
> one with programming of some SIMD registers to block TESS shaders
> on one unit. These fixed most of the hangs we saw during development.
>
> This doesn't contain SB support yet, Glenn has started working on it.
>
> Currently tested hw:
> working: CAYMAN, REDWOOD, BARTS, TURKS
> hangs on any tessellation: CAYMAN
> hangs differently at least with heaven: SUMO

You listed CAYMAN twice, so does it hang or not?

Marek