linux-kernel - Re: redraw issues on i915 since 4.9-rc

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Message-ID: <20161104125715.GA14586@nuc-i3427.alporthouse.com>
Date:   Fri, 4 Nov 2016 12:57:15 +0000
From:   Chris Wilson <chris@...is-wilson.co.uk>
To:     Norbert Preining <preining@...ic.at>
Cc:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: redraw issues on i915 since 4.9-rc

On Fri, Nov 04, 2016 at 08:40:47PM +0900, Norbert Preining wrote:
> Dear all,
> 
> since 4.9-rc series started I see heavy redraw problems on i915. Starting
> or resizing for example the digikam window messes up completely the content.
> 
> I have seen this at least since rc2 (I often wait till rc2), and 
> confirm that 4.8.0 does not exhibit these problems.
> 
> A screenshot of the redraw problems is attached.

The fencing looks correct. To me it looks like we filled the vma with
the wrong set of pages from the parent object.

https://cgit.freedesktop.org/drm-intel/ #drm-intel-nightly contains one
interesting patch wrt to the partial vma->pages
https://cgit.freedesktop.org/drm-intel/commit/?h=drm-intel-next-queued&id=d2a84a76a3b970fa32e6eda3d85e7782f831379e
Do you mind testing -nightly to see if I'm barking up the wrong tree?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre