From mboxrd@z Thu Jan  1 00:00:00 1970
From: Imre Deak <imre.deak@intel.com>
Subject: Re: [Intel-gfx] [PATCH 1/3] drm: Add an "expose 3d modes" property
Date: Thu, 04 Oct 2012 16:56:24 +0300
Message-ID: <1349358984.2423.4.camel@localhost>
References: <1348771268-3436-1-git-send-email-damien.lespiau@gmail.com>
	<1348771268-3436-2-git-send-email-damien.lespiau@gmail.com>
	<20121004133551.GG5661@phenom.ffwll.local>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org>
In-Reply-To: <20121004133551.GG5661@phenom.ffwll.local>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/dri-devel>,
	<mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/dri-devel>,
	<mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org
Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org
To: Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
List-Id: dri-devel@lists.freedesktop.org

On Thu, 2012-10-04 at 15:35 +0200, Daniel Vetter wrote:
> On Thu, Sep 27, 2012 at 07:41:06PM +0100, Damien Lespiau wrote:
> > From: Damien Lespiau <damien.lespiau@intel.com>
> > 
> > The "expose 3D modes" property can be attached to connectors to allow
> > user space to indicate it can deal with 3D modes and that the drm driver
> > should expose those 3D modes.
> > 
> > Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
> 
> I've thought a bit more about this and I don't like the connector prop so
> much any more:
> - connector properties stick around, so if you mix up your userspace
>   things could go wrong (e.g. i-g-t tests and ddx).
> - connector properties are exposed to users by default.
> - it makes little sense for userspace to not enable this on all
>   connectors.
> 
> So I think a per-file_priv option to not filter out 3d modes would be
> better suited.
> 
> We don't yet have any driver-agnostic ioctl yet for such things, so would
> require a bit more work ...

This would be useful for the monotonic time stamp support too. At the
moment the client would have to set a flag whether it wants real or raw
timestamp for each wait-for-vblank and page-flip ioctl, though what it
really needs is a one time setting.

--Imre