[Bug 76808] [IVB] RCS flip hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76808

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
The problem should be greatly reduced by:

commit 05524f5b61c3c15859477a2165cff81e3d682743
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Tue Feb 11 19:52:06 2014 +0200

    drm/i915: Prevent MI_DISPLAY_FLIP straddling two cachelines on IVB

    commit f66fab8e1cd6b3127ba4c5c0d11539fbe1de1e36 upstream.

    According to BSpec the entire MI_DISPLAY_FLIP packet must be contained
    in a single cacheline. Make sure that happens.

    v2: Use intel_ring_begin_cacheline_safe()
    v3: Use intel_ring_cacheline_align() (Chris)

    Cc: Bjoern C <lkml at call-home.ch>
    Cc: Alexandru DAMIAN <alexandru.damian at intel.com>
    Cc: Enrico Tagliavini <enrico.tagliavini at gmail.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=74053
    Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
    Cc: stable at vger.kernel.org
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
    Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>

in v3.13.5

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