[PATCH] drm/omap: gem: Fix tearing with BO_TILED

[Matthijs van Duin]

On Sat, Dec 21, 2019 at 08:41:41AM -0800, Tony Lindgren wrote:
> Also, I'm wondering if this change makes sense alone without the pinning
> changes for a fix, or if also the pinning changes are needed.

Both pinning and page-alignment are done just to support the direct
userspace mapping.  By themselves they mostly just waste tiler memory
but otherwise don't really have much impact.

It's not really clear to me why you have such interest in this specific
patch.  Does my patch series fix the tearing issue you've described?  If
so maybe without my patches tiled memory is just so slow that the frame
is being submitted too late, which perhaps causes an async page flip
(does it? I'm not sure) thus resulting in tearing?

Matthijs