[Intel-gfx] Flicker caused by "drm/i915: Eliminate usage of plane_wm_parameters from ILK-style WM code (v2)"

[Jan Niehusmann]

Hi Matt,

On Tue, Jan 05, 2016 at 01:58:19PM -0800, Matt Roper wrote:
> Hi Jan.  I think the flicker you're seeing is caused by our current lack
> of two-stage watermark updates on platforms that use ILK-style
> watermarks.  I have a patch series at
> http://patchwork.freedesktop.org/bundle/mattrope/atomic_wm_ilk/ that's
> supposed to address this, but it's still awaiting review at the moment

Yes, thanks! That patch set fixes the flickering, as well.

Applied the patches, some of them manually, to 4.4-rc8,
after re-appling the reverted watermark commits
from 2791a16ca43302d07ac74cbe7c048e367c4632c4 and
261a27d11fa1dec47c47ece6968eaaba55861eca.

I didn't do much testing, but the resulting kernel boots fine and the
flickering is gone.

Jan