From: Gustavo Padovan <gustavo.padovan@collabora.com>
To: Brian Starkey <brian.starkey@arm.com>,
Gustavo Padovan <gustavo@padovan.org>
Cc: linux-media@vger.kernel.org, Hans Verkuil <hverkuil@xs4all.nl>,
Mauro Carvalho Chehab <mchehab@osg.samsung.com>,
Shuah Khan <shuahkh@osg.samsung.com>,
linux-kernel@vger.kernel.org, Jonathan.Chai@arm.com
Subject: Re: [PATCH v3 02/15] [media] vb2: add explicit fence user API
Date: Wed, 04 Oct 2017 17:12:25 -0300 [thread overview]
Message-ID: <1507147945.2981.56.camel@collabora.com> (raw)
In-Reply-To: <20171002134212.GC22538@e107564-lin.cambridge.arm.com>
On Mon, 2017-10-02 at 14:42 +0100, Brian Starkey wrote:
> Hi,
>
> On Thu, Sep 07, 2017 at 03:42:13PM -0300, Gustavo Padovan wrote:
> > From: Gustavo Padovan <gustavo.padovan@collabora.com>
> >
> > Turn the reserved2 field into fence_fd that we will use to send
> > an in-fence to the kernel and return an out-fence from the kernel
> > to
> > userspace.
> >
> > Two new flags were added, V4L2_BUF_FLAG_IN_FENCE, that should be
> > used
> > when sending a fence to the kernel to be waited on, and
> > V4L2_BUF_FLAG_OUT_FENCE, to ask the kernel to give back an out-
> > fence.
>
> It seems a bit off to me to add this to the uapi, and document it,
> before any of the implementation is present in the kernel.
>
> Wouldn't it be better to move this patch to be the last one, after
> all
> of the implementation is done?
Yes, that seems a better idea.
Gustavo
next prev parent reply other threads:[~2017-10-04 20:12 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-07 18:42 [PATCH v3 00/15] V4L2 Explicit Synchronization support Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 01/15] [media] v4l: Document explicit synchronization behaviour Gustavo Padovan
2017-09-08 2:39 ` Nicolas Dufresne
2017-09-11 10:50 ` Hans Verkuil
2017-09-11 11:01 ` Hans Verkuil
2017-09-11 13:18 ` Gustavo Padovan
2017-09-11 13:26 ` Hans Verkuil
2017-09-11 13:34 ` Gustavo Padovan
2017-09-11 13:35 ` Hans Verkuil
2017-09-07 18:42 ` [PATCH v3 02/15] [media] vb2: add explicit fence user API Gustavo Padovan
2017-09-11 10:55 ` Hans Verkuil
2017-09-11 11:03 ` Hans Verkuil
2017-10-02 13:42 ` Brian Starkey
2017-10-04 20:12 ` Gustavo Padovan [this message]
2017-09-07 18:42 ` [PATCH v3 03/15] [media] vb2: check earlier if stream can be started Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 04/15] [media] vb2: add in-fence support to QBUF Gustavo Padovan
2017-10-02 13:43 ` Brian Starkey
2017-09-07 18:42 ` [PATCH v3 05/15] [media] uvc: enable subscriptions to other events Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 06/15] [media] vivid: assign the specific device to the vb2_queue->dev Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 07/15] [media] v4l: add V4L2_EVENT_BUF_QUEUED event Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 08/15] [media] vb2: add .buffer_queued() to notify queueing in the driver Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 09/15] [media] v4l: add support to BUF_QUEUED event Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 10/15] [media] vb2: add 'ordered' property to queues Gustavo Padovan
2017-10-02 13:43 ` Brian Starkey
2017-10-04 20:18 ` Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 11/15] [media] vivid: mark vivid queues as ordered Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 12/15] [media] vb2: add videobuf2 dma-buf fence helpers Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 13/15] [media] vb2: add infrastructure to support out-fences Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 14/15] fs/files: export close_fd() symbol Gustavo Padovan
2017-09-07 18:51 ` Eric Biggers
2017-09-07 20:36 ` Al Viro
2017-09-07 21:22 ` Gustavo Padovan
2017-09-07 22:03 ` Al Viro
2017-09-07 22:09 ` Hans Verkuil
2017-09-07 22:18 ` Gustavo Padovan
2017-09-07 18:42 ` [PATCH v3 15/15] [media] vb2: add out-fence support to QBUF Gustavo Padovan
2017-10-02 13:41 ` [PATCH v3 00/15] V4L2 Explicit Synchronization support Brian Starkey
2017-10-04 20:08 ` Gustavo Padovan
2017-10-13 1:56 ` Brian Starkey
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