[Mesa-dev] [Bug 91111] [BYT regression] dEQP-GLES3.functional.shaders.texture_functions.texturelod.usamplercube_*

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91111

            Bug ID: 91111
           Summary: [BYT regression]
                    dEQP-GLES3.functional.shaders.texture_functions.textur
                    elod.usamplercube_*
           Product: Mesa
           Version: 10.6
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Mesa core
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: brian.wilson at intel.com
        QA Contact: mesa-dev at lists.freedesktop.org

Tested Mesa commit:
c2a0600d5b0645533ba442b5ab879b23c2564a4d: "i965: Don't set NirOptions for
stages that will use the vec4 backend."
Plus patches:
- 10.6-i965-do-not-round-line-width-when-multisampling-or-a.patch
- 10.6-mesa-add-GL_RED-GL_RG-support-for-floating-point-tex.patch
- 10.6-i965-Momentarily-pretend-to-support-ARB_texture_sten.patch
- 10.6-Revert-i965-Advertise-a-line-width-of-40.0-on-Cherry.patch

Testing a Mesa update on ChromeOS, the following dEQP tests fail on BYT:
-
dEQP-GLES3.functional.shaders.texture_functions.texturelod.usamplercube_vertex
-
dEQP-GLES3.functional.shaders.texture_functions.texturelod.usamplercube_fragment

Sample failure:
"Image comparison failed: difference = 450.979, threshold = 0.05"

These tests pass on HSW, BDW and BSW, and passed on BYT with an older Mesa
commit (November 18, 2014: 129178893b2260df22db96327c5ca9c2ce7db046 "glsl:
Generate unique names for each const array lowered to uniforms" + ~10 patches)

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