[Bug 90067] [HSW Regression]HSW boot fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90067

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|intel-gfx-bugs at lists.freede |damien.lespiau at gmail.com
                   |sktop.org                   |

--- Comment #1 from lu hua <huax.lu at intel.com> ---
Bisect shows: b403745c84592b26a0713e6944c2b109f6df5c82 is the first bad commit
commit b403745c84592b26a0713e6944c2b109f6df5c82
Author:     Damien Lespiau <damien.lespiau at intel.com>
AuthorDate: Mon Aug 4 22:01:33 2014 +0100
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Thu Apr 16 11:42:38 2015 +0200

    drm/i915: Iterate through the initialized DDIs to prepare their buffers

    Not every DDIs is necessarily connected can be strapped off and, in the
    future, we'll have platforms with a different number of default DDI
    ports. So, let's only call intel_prepare_ddi_buffers() on DDI ports that
    are actually detected.

    We also use the opportunity to give a struct intel_digital_port to
    intel_prepare_ddi_buffers() as we'll need it in a following patch to
    query if the port supports HMDI or not.

    On my HSW machine this removes the initialization of a couple of
    (unused) DDIs.

    Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
    Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani at intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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