From: Nicolas Dufresne <nicolas.dufresne@collabora.com>
To: Marek Szyprowski <m.szyprowski@samsung.com>,
Kamil Debski <k.debski@samsung.com>,
'John Sheu' <sheu@google.com>,
linux-media@vger.kernel.org
Cc: m.chehab@samsung.com, posciak@google.com, arun.m@samsung.com,
kgene.kim@samsung.com, Hans Verkuil <hverkuil@xs4all.nl>
Subject: Re: [PATCH 4/4] v4l2-mem2mem: allow reqbufs(0) with "in use" MMAP buffers
Date: Mon, 02 Nov 2015 13:31:40 -0500 [thread overview]
Message-ID: <1446489100.15819.15.camel@collabora.com> (raw)
In-Reply-To: <5343D4BD.4090809@samsung.com>
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Le mardi 08 avril 2014 à 12:51 +0200, Marek Szyprowski a écrit :
> Hello,
>
> On 2014-04-07 16:41, Kamil Debski wrote:
> > Pawel, Marek,
> >
> > Before taking this to my tree I wanted to get an ACK from one of
> > the
> > videobuf2 maintainers. Could you spare a moment to look through
> > this
> > patch?
>
> It's not a bug, it is a feature. This was one of the fundamental
> design
> requirements to allow applications to track if the memory is used or
> not.
I still have the impression it is not fully correct for the case
buffers are exported using DMABUF. Like if the dmabuf was owning the
vb2 buffer instead of the opposite ...
Nicolas
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next prev parent reply other threads:[~2015-11-02 18:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-11 22:52 Upstream patches for Samsung Exynos s5p-mfc and gsc-m2m John Sheu
2014-03-11 22:52 ` [PATCH 1/4] s5p-mfc: fix encoder crash after VIDIOC_STREAMOFF John Sheu
2014-03-11 22:52 ` [PATCH 2/4] CHROMIUM: s5p-mfc: support dynamic encoding parameter changes John Sheu
2014-03-11 22:52 ` [PATCH 3/4] gsc-m2m: report correct format bytesperline and sizeimage John Sheu
2014-04-07 15:29 ` Kamil Debski
2014-04-08 6:56 ` Shaik Ameer Basha
2014-04-08 7:11 ` Shaik Ameer Basha
2014-03-11 22:52 ` [PATCH 4/4] v4l2-mem2mem: allow reqbufs(0) with "in use" MMAP buffers John Sheu
2014-04-07 14:41 ` Kamil Debski
2014-04-08 10:51 ` Marek Szyprowski
2015-11-02 18:31 ` Nicolas Dufresne [this message]
2015-11-11 21:29 ` Jean-Michel Hautbois
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