[Bug 90468] [IVB regression] Both DVI/DP monitors are black after X rotation + S3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90468

--- Comment #2 from xubin <bin.a.xu at intel.com> ---
==Bisect results==
----------------------------
Bisect shows: 0a9ab303b87a94115e361a7f3a15d9f481bc453b is the first bad commit.
commit 0a9ab303b87a94115e361a7f3a15d9f481bc453b
Author:     Ander Conselvan de Oliveira <ander.conselvan.de.oliveira at intel.com>
AuthorDate: Tue Apr 21 17:13:04 2015 +0300
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Fri May 8 13:04:01 2015 +0200

    drm/i915: Remove all *_pipes flags from modeset

    Set the mode_changed field on the crtc_states and use that instead.

    Note that even though this patch doesn't completely replace the logic in
    intel_modeset_affected_pipes(), that logic was never fully used to its
    full extent. Since the commit mentioned below, modeset_pipes and
    prepare_pipes would only contain at most the pipe for which the set_crtc
    ioctl was called. We can grow back that logic when the time comes.

    commit b6c5164d7bf624f3e1b750787ddb983150c5117c
    Author: Daniel Vetter <daniel.vetter at ffwll.ch>
    Date:   Fri Apr 12 18:48:43 2013 +0200

        drm/i915: Fixup Oops in the pipe config computation

    v2: Don't set mode_changed unconditionally for modeset_crtc. (Ander)
        Check for needs_modeset() before trying to allocate a PLL. (Ander)
        Only call .crtc_enable() for pipes that were disabled. (Maarten)

    Signed-off-by: Ander Conselvan de Oliveira
<ander.conselvan.de.oliveira at intel.com>
    Reviewed-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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