linux-kernel - Re: [RFC 0/6] drm/fences: add in-fences to DRM

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Message-ID: <CAAQKjZOuf_B9YgmOV+2wzP7C+hidmE7EHK-1rrSqEqSbRS5t0A@mail.gmail.com>
Date:	Thu, 31 Mar 2016 20:40:01 +0900
From:	Inki Dae <daeinki@...il.com>
To:	Daniel Stone <daniel@...ishbar.org>,
	Inki Dae <inki.dae@...sung.com>,
	Rob Clark <robdclark@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	Arve Hjønnevåg <arve@...roid.com>,
	Riley Andrews <riandrews@...roid.com>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
	John Harrison <John.C.Harrison@...el.com>
Cc:	Daniel Vetter <daniel.vetter@...ll.ch>
Subject: Re: [RFC 0/6] drm/fences: add in-fences to DRM

2016-03-31 19:04 GMT+09:00 Daniel Vetter <daniel@...ll.ch>:
> On Thu, Mar 31, 2016 at 10:35:11AM +0100, Daniel Stone wrote:
>> Well, it has to be one or the other: mixing explicit and implicit,
>> defeats the purpose of using explicit fencing. So, when explicit
>> fencing is in use, implicit fences must be ignored.
>
> You can mix it, if you're careful. CrOS wants that to better mesh android
> with Ozone, and we'll be discussing what needs to be added to be able to
> make it work implicit and explicit fencing work together, in both
> directions. Of course this should only be used for shared buffers, e.g.
> explicit syncing in an android client running on top of implicitly synced
> ozone/kms.

Good idea. I hope fence things of mainline would be more discussed so
could be considered for many cases.

Thanks,
Inki Dae

> -Daniel
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
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> dri-devel@...ts.freedesktop.org
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