[Bug 79572] New: [Bisected]Rendercheck blend fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79572

          Priority: high
            Bug ID: 79572
          Assignee: chris at chris-wilson.co.uk
           Summary: [Bisected]Rendercheck blend fails
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

System Environment:
--------------------------
Platform: Ivybridge
Libdrm:       
(master)libdrm-2.4.54-9-g8fc62ca8ac010659023bb63c4759eb683de4f9af
Mesa:        (master)84e0a5c406f2a8f060352eaa4b5c138e3f1a5a86
Xserver:   
(master)xorg-server-1.15.99.902-97-gdb2e708f31a162c6c66643d3559dd5f3e21ee06b
Xf86_video_intel:(master)2.99.911-225-gffbe0aa1851c35cc2403633ca493e9fc6a471fd4
Libva:        (staging)35e70cb9b9c77dfb99fb370e319ed501f0c31b17
Libva_intel_driver:    (staging)fbbe401aa28a0b3859d587ef08f0df15a2f7c8f2
Kernel:    (drm-intel-nightly)085391259463f3bda367fc3e078504d83cd8dc0e

Bug detailed description:
-----------------------------
It fails on all platforms with Xf86_video_intel master branch.
triangles also fails.

Bisect shows:961139f5878572ebea268a0bbf47caf05af9093f is the first bad commit
commit 961139f5878572ebea268a0bbf47caf05af9093f
Author:     Chris Wilson <chris at chris-wilson.co.uk>
AuthorDate: Fri May 30 09:45:15 2014 +0100
Commit:     Chris Wilson <chris at chris-wilson.co.uk>
CommitDate: Fri May 30 23:14:15 2014 +0100

    sna: Use manual detiling for downloads

    If we can CPU mmap the GPU bo, prefer to do so for migration to the CPU
    as this saves an extra serialisation step.

    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
Beginning blend test on a8r8g8b8
Beginning blend test on x8r8g8b8
Beginning blend test on b8g8r8a8
Src blend test error of 255.0000 at (0, 0) --
           R     G     B     A
got:       0.000 0.000 0.000 0.000
expected:  0.000 0.000 0.000 1.000
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: b8g8r8a8
Beginning blend test on b8g8r8x8
Src blend test error of 255.0000 at (0, 0) --
           R     G     B     A
got:       0.000 0.000 0.000 1.000
expected:  1.000 1.000 1.000 1.000
src color: 1.00 1.00 1.00 1.00 (a8r8g8b8)
dst color: 1.00 1.00 1.00 1.00
src: 1x1R a8r8g8b8, dst: b8g8r8x8
Beginning blend test on r8g8b8
Beginning blend test on b8g8r8
Beginning blend test on r5g5b5
Beginning blend test on b5g5r5
Src blend test error of 31.0000 at (0, 0) --
           R     G     B     A
got:       0.000 0.000 0.000 1.000
expected:  1.000 1.000 1.000 1.000
src color: 1.00 1.00 1.00 1.00 (a8r8g8b8)
dst color: 1.00 1.00 1.00 1.00
src: 1x1R a8r8g8b8, dst: b5g5r5
Beginning blend test on x1r5g5b5
Beginning blend test on x1b5g5r5
Src blend test error of 31.0000 at (0, 0) --
           R     G     B     A
got:       0.000 0.000 0.000 1.000
expected:  1.000 1.000 1.000 1.000
src color: 1.00 1.00 1.00 1.00 (a8r8g8b8)
dst color: 1.00 1.00 1.00 1.00
src: 1x1R a8r8g8b8, dst: x1b5g5r5
Beginning blend test on r5g6b5
Beginning blend test on b5g6r5
Src blend test error of 63.0000 at (0, 0) --
           R     G     B     A
got:       0.000 0.000 0.000 1.000
expected:  1.000 1.000 1.000 1.000
src color: 1.00 1.00 1.00 1.00 (a8r8g8b8)
dst color: 1.00 1.00 1.00 1.00
src: 1x1R a8r8g8b8, dst: b5g6r5
Beginning blend test on x8b8g8r8
Beginning blend test on x2r10g10b10
Src blend test error of 255.0000 at (0, 0) --
           R     G     B     A
got:       0.000 0.000 0.000 1.000
expected:  1.000 1.000 1.000 1.000
src color: 1.00 1.00 1.00 1.00 (a8r8g8b8)
dst color: 1.00 1.00 1.00 1.00
src: 1x1R a8r8g8b8, dst: x2r10g10b10
Beginning blend test on x2b10g10r10
Src blend test error of 255.0000 at (0, 0) --
           R     G     B     A
got:       0.000 0.000 0.000 1.000
expected:  1.000 1.000 1.000 1.000
src color: 1.00 1.00 1.00 1.00 (a8r8g8b8)
dst color: 1.00 1.00 1.00 1.00
src: 1x1R a8r8g8b8, dst: x2b10g10r10
Beginning blend test on r8g8b8 window
10 tests passed of 17 total
Successful Groups:

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

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