[Bug 71286] New: [945/PNV]Rendercheck blend fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71286

          Priority: high
            Bug ID: 71286
          Assignee: chris at chris-wilson.co.uk
           Summary: [945/PNV]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:  PNV/945gm
Libdrm:        (master)2.4.47-2-g45810d3d7546f3ddbcdae114c6726ada30e919c9
Mesa:        (master)86cdff56353a223d3c9c1cd24bc83a1799eaa6d9
Xf86_video_intel:(master)2.99.905-67-ga0d1de962a8107cfcaefd82eb8ffaf3e4da0e130
Cairo:        (master)98fef3cef2d0f7f463a2e4f9f1b35b09f7b6ea77
Libva:        (staging)1a011ce5bb0b80506797a25a988854f3f81ce909
Libva_intel_driver:        (staging)1cee858036a87837deddc87586701ed869f96261
Kernel:    (drm-intel-nightly) 164a4cb4c1431a0689f85507868356fae24da638

Bug detailed description:
---------------------------
It fails on 945gm and pineview.
Bisect shows:587c4866652e40e1e228b333028114766a6d3b08 is the first bad commit.
commit 587c4866652e40e1e228b333028114766a6d3b08
Author:     Chris Wilson <chris at chris-wilson.co.uk>
AuthorDate: Mon Nov 4 15:10:40 2013 +0000
Commit:     Chris Wilson <chris at chris-wilson.co.uk>
CommitDate: Mon Nov 4 15:12:37 2013 +0000

    sna: Promote uint16_t to a full int to avoid overflow in computing w*h in
me

    Reported-by: Conley Moorhous <conleymoorhous at gmail.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70527
    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:  1.000 1.000 1.000 1.000
src color: 1.00 1.00 1.00 1.00 (b8g8r8x8)
dst color: 1.00 1.00 1.00 1.00
src: 10x10 b8g8r8x8, dst: 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
16 tests passed of 17 total
Successful Groups:

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

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