From: Tomasz Stanislawski <t.stanislaws@samsung.com>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>,
Pawel Osciak <pawel@osciak.com>,
Sumit Semwal <sumit.semwal@ti.com>,
linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org,
arnd@arndb.de, jesse.barker@linaro.org, m.szyprowski@samsung.com,
rob@ti.com, daniel@ffwll.ch, patches@linaro.org
Subject: Re: [RFCv1 2/4] v4l:vb2: add support for shared buffer (dma_buf)
Date: Fri, 20 Jan 2012 17:20:22 +0100 [thread overview]
Message-ID: <4F199446.6040403@samsung.com> (raw)
In-Reply-To: <201201201711.50965.laurent.pinchart@ideasonboard.com>
>>
>> IMO, One way to do this is adding field 'struct device *dev' to struct
>> vb2_queue. This field should be filled by a driver prior to calling
>> vb2_queue_init.
>
> I haven't looked into the details, but that sounds good to me. Do we have use
> cases where a queue is allocated before knowing which physical device it will
> be used for ?
>
I don't think so. In case of S5P drivers, vb2_queue_init is called while
opening /dev/videoX.
BTW. This struct device may help vb2 to produce logs with more
descriptive client annotation.
What happens if such a device is NULL. It would happen for vmalloc
allocator used by VIVI?
Regards,
Tomasz Stanislawski
next prev parent reply other threads:[~2012-01-20 16:20 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-05 10:41 [RFCv1 0/4] v4l: DMA buffer sharing support as a user Sumit Semwal
2012-01-05 10:41 ` [RFCv1 1/4] v4l: Add DMABUF as a memory type Sumit Semwal
2012-01-05 10:41 ` [RFCv1 2/4] v4l:vb2: add support for shared buffer (dma_buf) Sumit Semwal
2012-01-14 20:38 ` [Linaro-mm-sig] " Sakari Ailus
[not found] ` <CAB2ybb83ub=A45-m6o+RXqFOTUmXCgeFqs03WZDHeWeLe2+29w@mail.gmail.com>
2012-01-16 5:35 ` Semwal, Sumit
2012-01-20 15:04 ` Laurent Pinchart
2012-01-19 19:07 ` Pawel Osciak
2012-01-20 10:41 ` Sumit Semwal
2012-01-20 10:58 ` Tomasz Stanislawski
2012-01-20 15:12 ` Laurent Pinchart
2012-01-20 15:53 ` Tomasz Stanislawski
2012-01-20 16:11 ` Laurent Pinchart
2012-01-20 16:20 ` Tomasz Stanislawski [this message]
2012-01-20 16:28 ` Laurent Pinchart
2012-01-23 9:06 ` Marek Szyprowski
2012-01-23 9:40 ` Daniel Vetter
2012-01-23 9:45 ` Daniel Vetter
2012-01-23 9:48 ` Laurent Pinchart
2012-01-23 10:35 ` Daniel Vetter
2012-01-23 10:54 ` Laurent Pinchart
2012-01-24 0:26 ` Clark, Rob
2012-01-24 9:34 ` Laurent Pinchart
2012-01-24 10:52 ` Daniel Vetter
2012-01-24 13:03 ` Daniel Vetter
2012-01-25 8:09 ` Daniel Vetter
2012-01-30 14:44 ` Laurent Pinchart
2012-01-30 16:29 ` Daniel Vetter
2012-01-25 23:28 ` Sakari Ailus
2012-01-26 11:27 ` Daniel Vetter
2012-01-29 11:03 ` Sakari Ailus
2012-01-29 13:03 ` Daniel Vetter
2012-01-30 14:33 ` Laurent Pinchart
2012-01-30 22:01 ` Sakari Ailus
2012-01-31 15:38 ` Clark, Rob
2012-02-02 10:19 ` Laurent Pinchart
2012-02-02 14:01 ` Clark, Rob
2012-02-02 14:40 ` Sumit Semwal
2012-02-02 20:23 ` Daniel Vetter
2012-02-02 20:49 ` Clark, Rob
2012-02-04 11:43 ` Sakari Ailus
2012-02-05 15:08 ` Clark, Rob
2012-01-20 14:55 ` [Linaro-mm-sig] " Laurent Pinchart
2012-01-05 10:41 ` [RFCv1 3/4] v4l:vb: remove warnings about MEMORY_DMABUF Sumit Semwal
2012-01-05 10:41 ` [RFCv1 4/4] v4l:vb2: Add dma-contig allocator as dma_buf user Sumit Semwal
2012-01-16 7:57 ` [RFCv1 0/4] v4l: DMA buffer sharing support as a user Kyungmin Park
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