Bug 108734

Summary: Regression: [bisected] dEQP-GLES31.functional.tessellation.invariance.* start failing on r600
Product: Mesa Reporter: Gert Wollny <gw.fossdev>
Component: OtherAssignee: mesa-dev
Status: NEW --- QA Contact: mesa-dev
Severity: normal    
Priority: medium CC: mirh
Version: git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:

Description Gert Wollny 2018-11-13 16:36:06 UTC
The patch  

  5d517a599b1eabd1d5696bf31e26f16568d35770 
  st/mesa: Don't record garbage streamout information in the non-SSO case.

breaks dEQP-GLES31.functional.tessellation.invariance.* on r600. All the tests pass without this patch, but with the patch applied 

   glGetQueryObjectuiv(queryObject, GL_QUERY_RESULT, &result);

returns zero in result for all the tests from this set, which is not correct.
Comment 1 Gert Wollny 2018-11-14 17:44:57 UTC
A bit of digging showed that in these tests the driver only seems to write streamout data from the TES shader, but it somehow gets lost. My guess is that the driver at one point ignores the TF information attached at stages that are not the vertex shader, because before this patch the TES TF output information gets attached in each stage, and hence, also in the VS stage.

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