[Bug 97480] [SKL/BDW/HSW Bisected] GpuTest 0.7.0 GiMark lighting is wrong

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97480

            Bug ID: 97480
           Summary: [SKL/BDW/HSW Bisected] GpuTest 0.7.0 GiMark lighting
                    is wrong
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: pekka.jylha-ollila at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 126030
  --> https://bugs.freedesktop.org/attachment.cgi?id=126030&action=edit
Screenshot of GiMark

Lighting is broken in GiMark on SKL and BDW after the following commit:

commit ebdc82d06532f992aea592265c29a11330e698fa
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Tue Jul 26 13:19:46 2016 -0700

    i965: Fix move_interpolation_to_top() pass.

The darker areas on the smaller rings are moving all over the surfaces. I
attached a picture that shows the problem.

I saw this first on HSW but noticed it later on the two other platforms.
The commit above broke lighting on SKL and BDW, while it fixed lighting on HSW.

The commit where lighting got broken earlier on HSW is:

commit 8c7a42b3e880804e201ee9582a0a73763cdd2a01
Author: Matt Turner <mattst88 at gmail.com>
Date:   Mon Feb 1 11:14:01 2016 -0800

    i965/fs: Allocate single register at a time for constants.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-3d-bugs/attachments/20160825/19043d78/attachment-0001.html>