[Bug 79311] Call trace originating from i915 referencing intel_wait_for_vblank()

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=79311

Jani Nikula <jani.nikula at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|damien.lespiau at intel.com    |ville.syrjala at linux.intel.c
                   |                            |om

--- Comment #20 from Jani Nikula <jani.nikula at intel.com> ---
The regressing commit is

commit 56ef52cad5e37fca89638e4bad598a994ecc3d9f
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Thu May 8 19:23:15 2014 +0300

    drm/i915: Kill vblank waits after pipe enable on gmch platforms

    The pipe might not start to actually run until the port has been enabled
    (depends on the platform and port type). So don't try to wait for vblank
    after we enabled the pipe but haven't yet enabled the port.

    Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
    Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
    References: https://bugs.freedesktop.org/show_bug.cgi?id=77297
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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