From: KyongHo Cho <pullip.cho@samsung.com>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org,
Tomasz Stanislawski <t.stanislaws@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>
Subject: Re: [Linaro-mm-sig] Buffer sharing proof-of-concept
Date: Tue, 2 Aug 2011 20:59:30 +0900 [thread overview]
Message-ID: <CAHQjnONh3=dRfL-_6gBT2pa=erRKUe9OMiMQjXDQyN493Gz4tw@mail.gmail.com> (raw)
In-Reply-To: <4E37C7D7.40301@samsung.com>
Hi.
On Tue, Aug 2, 2011 at 6:48 PM, Marek Szyprowski
<m.szyprowski@samsung.com> wrote:
> Hello Everyone,
>
> This patchset introduces the proof-of-concept infrastructure for buffer
> sharing between multiple devices using file descriptors. The infrastructure
> has been integrated with V4L2 framework, more specifically videobuf2 and two
> S5P drivers FIMC (capture interface) and TV drivers, but it can be easily
> used by other kernel subsystems, like DRI.
>
> In this patch the buffer object has been simplified to absolute minimum - it
> contains only the buffer physical address (only physically contiguous
> buffers are supported), but this can be easily extended to complete scatter
> list in the future.
>
Is this patch set an attempt to share a buffer between different
processes via open file descriptors?
Your patches seems to include several constructs to pack information
about a buffer in an open file descriptor
and to unpack it.
I don't have any idea what is the purpose of your attempts.
Is it the first step to the unified memory model that is being
discussed in Linaro?
Regards,
Cho KyongHo.
next prev parent reply other threads:[~2011-08-02 11:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-02 9:48 Buffer sharing proof-of-concept Marek Szyprowski
2011-08-02 9:49 ` [PATCH 1/6] drivers: base: add shared buffer framework Marek Szyprowski
2011-08-02 18:09 ` [Linaro-mm-sig] " Clark, Rob
2011-08-02 9:50 ` [PATCH 2/6] v4l: add buffer exporting via shrbuf Marek Szyprowski
2011-08-02 9:52 ` [PATCH 3/6] v4l: vb2: add support for shared buffer (shrbuf) Marek Szyprowski
2011-08-02 9:53 ` [PATCH 4/6] v4l: vb2: integrate dma-contig allocator with shrbuf Marek Szyprowski
2011-08-02 9:53 ` [PATCH 5/6] v4l: fimc: integrate capture i-face " Marek Szyprowski
2011-08-02 9:54 ` [PATCH 6/6] v4l: s5p-tv: mixer: integrate " Marek Szyprowski
2011-08-02 11:59 ` KyongHo Cho [this message]
2011-08-02 14:48 ` [Linaro-mm-sig] Buffer sharing proof-of-concept Marek Szyprowski
2011-08-02 15:44 ` Jordan Crouse
2011-08-03 9:33 ` Tom Cooksey
2011-08-03 15:12 ` Jordan Crouse
2011-08-04 8:58 ` Daniel Vetter
2011-08-04 11:14 ` Clark, Rob
2011-08-04 12:34 ` Daniel Vetter
2011-08-04 16:19 ` Clark, Rob
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