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

[Dave Airlie]

On 30 November 2015 at 19:51, Marek Olšák <maraeo at gmail.com> wrote:
> 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?

oops CAICOS I meant.

I have some fglrx traces from it, I just haven't had time to dig into it yet.

Dave.