[Bug 88780] Several Unity3D-based games render with "foggy blueish overlay"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88780

            Bug ID: 88780
           Summary: Several Unity3D-based games render with "foggy blueish
                    overlay"
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: kai at dev.carbon-project.org
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 112787
  --> https://bugs.freedesktop.org/attachment.cgi?id=112787&action=edit
Blue overlay with Dreamfall Chapters in the lab scene

With the stack detailed below (AFAICT this is *NOT* a regression, because I
seem to remember having these hazy blue scenes with older versions of Mesa as
well) several Unity3D-based games (e.g. Jagged Alliance: Flashback or Dreamfall
Chapters) render either entirely or only some scenes as if there was some fog
overlay with a blue hue.

For Dreamfall Chapters (from which the attached screenshot originates), it's
only for some scenes, sometimes even dependant on the camera angle. For
example, in the Queenie scene only some camera angles exhibit this problem,
while in the lab scene, you have it constantly. With Dreamfall Chapters this
bug can be seen mostly indoors.

Games like Jagged Alliance render all 3D scenes with this blue hue overlay.
This is, every sector you go into shows this problem.

My current stack (Debian testing as a base):
GPU: Hawaii PRO [Radeon R9 290] (ChipID = 0x67b1)
Mesa: Git:master/d2811c29da
libdrm: Git:master/libdrm-2.4.59
LLVM: SVN:trunk/r226934 (3.7 devel)
X.Org: Git:master/6672606420
Linux: Git:<git://people.freedesktop.org/~airlied/linux>:drm-fixes/67cf2d3912
Firmware: <http://people.freedesktop.org/~agd5f/radeon_ucode/>
> 9e05820da42549ce9c89d147cf1f8e19  hawaii_ce.bin
> c8bab593090fc54f239c8d7596c8d846  hawaii_mc.bin
> 3618dbb955d8a84970e262bb2e6d2a16  hawaii_me.bin
> c000b0fc9ff6582145f66504b0ec9597  hawaii_mec.bin
> 0643ad24b3beff2214cce533e094c1b7  hawaii_pfp.bin
> ba6054b7d78184a74602fd81607e1386  hawaii_rlc.bin
> 11288f635737331b69de9ee82fe04898  hawaii_sdma.bin
> 284429675a5560e0fad42aa982965fc2  hawaii_smc.bin
libclc: Git:master/d73f33b736
DDX: Git:master/c9f8f642fd

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