[Bug 91697] [SKL, BIOS upgrade regression] distorted display after resume from suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91697

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

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

--- Comment #22 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Akshu Agrawal from comment #21)
> If we just enable the ‘DBUF Power Request’ bit in DBUF_CNTL, there is no
> display corruption. IMO this bit is left in reset state as we are enabling
> the PW2 in BIOS. Following change would also fix the issue:

We already have

commit 39d9b85a4d4fa1642663ca0d208b5c246a3d6f50
Author: Gary Wang <gary.c.wang at intel.com>
Date:   Fri Aug 28 16:40:34 2015 +0800

    drm/i915: set CDCLK if DPLL0 enabled during resuming from S3

merged in drm-intel-next-fixes. I just overlooked closing the bug. If there's a
problem with that commit, please reopen.

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