[Bug 86230] [ILK/HSW/BYT/BDW Bisected]igt/kms_setmode/invalid-clone-single-crtc kernel BUG at drivers/gpu/drm/i915/i915_gem.c:4212!

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86230

lu hua <huax.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|intel-gfx-bugs at lists.freede |jbarnes at virtuousgeek.org
                   |sktop.org                   |
            Summary|[HSW/BYT/BDW                |[ILK/HSW/BYT/BDW
                   |Regression]igt/kms_setmode/ |Bisected]igt/kms_setmode/in
                   |invalid-clone-single-crtc   |valid-clone-single-crtc
                   |kernel BUG at               |kernel BUG at
                   |drivers/gpu/drm/i915/i915_g |drivers/gpu/drm/i915/i915_g
                   |em.c:4212!                  |em.c:4212!

--- Comment #3 from lu hua <huax.lu at intel.com> ---
Bisect shows a642010b26ea65adae53cbfaaa5936cc6548bbfd is the firs bad commit.
commit a642010b26ea65adae53cbfaaa5936cc6548bbfd
Author:     Jesse Barnes <jbarnes at virtuousgeek.org>
AuthorDate: Fri Nov 7 13:11:00 2014 -0800
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Wed Nov 12 09:21:29 2014 +0100

    drm/i915: use compute_config in set_config v4

    This will allow us to consult more info before deciding whether to flip
    or do a full mode set.

    v2:
      - don't use uninitialized or incorrect pipe masks in set_config
        failure path (Ander)
    v3:
      - fixup for pipe_config changes in compute_config (Jesse)
    v4:
      - drop spurious hunk in force restore path (Ander)

    Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
    Reviewed-by: Ander Conselvan de Oliveira
<ander.conselvan.de.oliveira at intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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