[Bug 85389] New: [ILK Bisected]Rendercheck blend fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85389

            Bug ID: 85389
           Summary: [ILK Bisected]Rendercheck blend fails
           Product: xorg
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: high
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

System Environment:
--------------------------
Platform: ILK
Libdrm:       
(master)libdrm-2.4.58-4-g00847fa48b83a85b0cb882594a12ed1511f780db
Mesa:        (master)9ad80d1d1876493b45428b5f81b03add3ae8150e
Xserver:   
(master)xorg-server-1.16.0-419-g942e18e17e334d7a25f8c1dcc6f5c3711eeb6a7d
Xf86_video_intel:(master)2.99.916-114-ga8d1eaf6ee1fed0aeff681d33864e17cb904ddd3
Libva:        (master)ccd93de5a707e92a629cccd595757c8d436fa3cc
Libva_intel_driver:(master)f11176415ec26eb5960ba6841d2d9c22f2cabc60
Kernel:   (drm-intel-nightly)77683b77aa4da6e1788838dad2d2a15b0dfc290b

Bug detailed description:
---------------------------
It fails on ILK. It's Xf86_video_intel regression.
Bisect shows: b4872f74c05a92c91d7b57146eb35ed2ecc86d97 is the first bad commit
commit b4872f74c05a92c91d7b57146eb35ed2ecc86d97
Author:     Chris Wilson <chris at chris-wilson.co.uk>
AuthorDate: Tue Oct 21 10:38:22 2014 +0100
Commit:     Chris Wilson <chris at chris-wilson.co.uk>
CommitDate: Tue Oct 21 20:30:21 2014 +0100

    sna: Avoid pwriting large batches

    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>


output:
rendercheck 1.4
Render extension version 0.11
Window format: r8g8b8
Found server-supported format: a8
Found server-supported format: a8r8g8b8
Found server-supported format: x8r8g8b8
Found server-supported format: b8g8r8a8
Found server-supported format: b8g8r8x8
Found server-supported format: r8g8b8
Found server-supported format: b8g8r8
Found server-supported format: r5g5b5
Found server-supported format: b5g5r5
Found server-supported format: x1r5g5b5
Found server-supported format: x1b5g5r5
Found server-supported format: r5g6b5
Found server-supported format: b5g6r5
Found server-supported format: x8b8g8r8
Found server-supported format: x2r10g10b10
Found server-supported format: x2b10g10r10
Beginning blend test on a8
Xor blend test error of 255.0000 at (0, 0) --
           R     G     B     A
got:       0.000 0.000 0.000 1.000
expected:  0.000 0.000 0.000 0.000
src color: 0.00 0.00 0.00 1.00 (a8)
dst color: 0.00 0.00 0.00 1.00
src: 1x1R a8, dst: a8
Beginning blend test on a8r8g8b8
Xor blend test error of 255.0000 at (0, 0) --
           R     G     B     A
got:       0.000 0.000 0.000 1.000
expected:  0.000 0.000 0.000 0.000
src color: 0.00 0.00 0.00 1.00 (a8)
dst color: 0.00 0.00 0.00 1.00
src: 1x1R a8, dst: a8r8g8b8
Beginning blend test on x8r8g8b8
Beginning blend test on b8g8r8a8
Beginning blend test on b8g8r8x8
Beginning blend test on r8g8b8
Beginning blend test on b8g8r8
Beginning blend test on r5g5b5
Beginning blend test on b5g5r5
Beginning blend test on x1r5g5b5
Beginning blend test on x1b5g5r5
Beginning blend test on r5g6b5
Beginning blend test on b5g6r5
Beginning blend test on x8b8g8r8
Beginning blend test on x2r10g10b10
Beginning blend test on x2b10g10r10
Beginning blend test on r8g8b8 window
15 tests passed of 17 total
Successful Groups:


Reproduce steps:
-------------------------
1. xinit
2. ./rendercheck -o src,over,overreverse,xor -t blend

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