From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gustavo Padovan <gustavo.padovan@collabora.com>
Subject: Re: [PATCH v5 4/4] drm/fence: add out-fences support
Date: Thu, 20 Oct 2016 13:55:38 -0200
Message-ID: <20161020155538.GA10205@joana>
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To: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= <ville.syrjala@linux.intel.com>
Cc: Gustavo Padovan <gustavo@padovan.org>, dri-devel@lists.freedesktop.org, marcheu@google.com, Daniel Stone <daniels@collabora.com>, seanpaul@google.com, Daniel Vetter <daniel.vetter@ffwll.ch>, linux-kernel@vger.kernel.org, laurent.pinchart@ideasonboard.com, Gustavo Padovan <gustavo.padovan@collabora.co.uk>, John Harrison <John.C.Harrison@Intel.com>, m.chehab@samsung.com
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2016-10-20 Ville Syrjälä <ville.syrjala@linux.intel.com>:

> On Thu, Oct 20, 2016 at 12:50:05PM -0200, Gustavo Padovan wrote:
> > From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
> > 
> > Support DRM out-fences by creating a sync_file with a fence for each CRTC
> > that sets the OUT_FENCE_PTR property.
> 
> I still maintain the out fence should also be per fb (well, per plane
> since we can't add it to fbs). Otherwise it's not going to be at all
> useful if you do fps>vrefresh and don't include the same set of planes
> in every atomic ioctl, eg. if you only ever include ones that are
> somehow dirty.

How would the kernel signal these dirty planes then? Right now we signal
at the vblank.

Gustavo