[Mesa-dev] [PATCH] radeonsi/gfx9: add a temporary workaround for a tessellation driver bug

[Marek Olšák]

On Tue, Aug 22, 2017 at 2:15 PM, Nicolai Hähnle <nhaehnle at gmail.com> wrote:
> On 22.08.2017 14:10, Nicolai Hähnle wrote:
>>
>> On 22.08.2017 13:00, Marek Olšák wrote:
>>>
>>> On Tue, Aug 22, 2017 at 9:37 AM, Nicolai Hähnle <nhaehnle at gmail.com>
>>> wrote:
>>>>
>>>> On 18.08.2017 19:06, Marek Olšák wrote:
>>>>>
>>>>>
>>>>> Ping.
>>>>>
>>>>> On Wed, Aug 16, 2017 at 12:57 AM, Marek Olšák <maraeo at gmail.com> wrote:
>>>>>>
>>>>>>
>>>>>> From: Marek Olšák <marek.olsak at amd.com>
>>>>>>
>>>>>> The workaround will do for now. The root cause is still unknown.
>>>>>>
>>>>>> This fixes new piglit: 16in-1out
>>>>
>>>>
>>>>
>>>> I don't see this test. Did you already send it out?
>>>
>>>
>>> "[PATCH] arb_tessellation_shader: new tests for a radeonsi bug" on the
>>> piglit ML.
>>
>>
>> Curious, I can't reproduce the problem on my Raven.
>
>
> VGT_LS_HS_CONFIG.NUM_PATCHES is 16, so there should definitely be more than
> one wave per thread-group.

The test is insufficient to reproduce the issue, but you'll see it
when you run the test with ST_DEBUG=wf with and without the fix.

Marek