[Bug 60527] Linux 3.10.0: black screen on Asus UX32VD, please revert -> Revert "drm/i915: revert eDP bpp clamping code changes"

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=60527

Fabio Erculiani <lxnay at sabayon.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |airlied at linux.ie,
                   |                            |dri-devel at lists.freedesktop
                   |                            |.org
            Summary|Linux 3.10.0: black screen  |Linux 3.10.0: black screen
                   |on Asus UX32VD (KMS         |on Asus UX32VD, please
                   |related)                    |revert -> Revert "drm/i915:
                   |                            |revert eDP bpp clamping
                   |                            |code changes"

--- Comment #5 from Fabio Erculiani <lxnay at sabayon.org> ---
I ran a git bisect and here's what I've found:

657445fe8660100ad174600ebfa61536392b7624 is the first bad commit
commit 657445fe8660100ad174600ebfa61536392b7624
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Sat May 4 10:09:18 2013 +0200

    Revert "drm/i915: revert eDP bpp clamping code changes"

    This reverts commit 57c219633275c7e7413f8bc7be250dc092887458.

    It's an ugly hack for a Haswell SDV platform where the vbt doesn't
    seem to fully agree with the panel. Since it seems to cause issues on
    real eDP platform let's just kill this hack again.

    Reported-and-tested-by: Josh Boyer <jwboyer at gmail.com>
    References: https://lkml.org/lkml/2013/5/3/467
    Cc: Paulo Zanoni <przanoni at gmail.com>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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