linux-kernel - Re: [PATCH v10 3/3] drm/fence: add out-fences support

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Message-ID: <CAKMK7uFxUh72NuGR8Zc4mA3t=vW4MmtHReOiB1O+wEWypzMatQ@mail.gmail.com>
Date:   Mon, 14 Nov 2016 21:08:18 +0100
From:   Daniel Vetter <daniel.vetter@...ll.ch>
To:     Brian Starkey <brian.starkey@....com>
Cc:     Gustavo Padovan <gustavo@...ovan.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Daniel Stone <daniels@...labora.com>,
        Rob Clark <robdclark@...il.com>,
        Greg Hackmann <ghackmann@...gle.com>,
        John Harrison <John.C.Harrison@...el.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sean Paul <seanpaul@...gle.com>,
        Stéphane Marchesin <marcheu@...gle.com>,
        m.chehab@...sung.com,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
        "Syrjala, Ville" <ville.syrjala@...ux.intel.com>
Subject: Re: [PATCH v10 3/3] drm/fence: add out-fences support

On Mon, Nov 14, 2016 at 3:57 PM, Brian Starkey <brian.starkey@....com> wrote:
> I was just writing some internal docs, and it occurred to me that the
> out-fence implementation here doesn't seem to match what we discussed
> with Ville a few weeks back (which had completely slipped my mind).
>
> Did the idea of returning -1 fences for multiple commits within a
> frame get dropped? I didn't see any discussion further than that
> thread on v5 from October:
> http://lkml.iu.edu/hypermail/linux/kernel/1610.2/04727.html

Atm we only support a queue depth of 1, and not faster than vblank.
This was just discussions to make sure we're not drawing ourselves
into a corner with this uabi.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch