From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
To: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
Sakari Ailus <sakari.ailus@iki.fi>,
Hans Verkuil <hans.verkuil@cisco.com>,
Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Subject: Re: [PATCH/RFC v2 4/4] v4l: vsp1: Add HGO support
Date: Mon, 13 Jun 2016 17:33:01 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.64.1606131726380.18676@axis700.grange> (raw)
In-Reply-To: <1463012283-3078-5-git-send-email-laurent.pinchart+renesas@ideasonboard.com>
Hi Laurent,
On Thu, 12 May 2016, Laurent Pinchart wrote:
> The HGO is a Histogram Generator One-Dimension. It computes per-channel
> histograms over a configurable region of the image with optional
> subsampling.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
[snip]
Do I understand this correctly, that with this if such a metadata device
is opened, while no video data is streaming, all calls will succeed, but
no buffers will be dequeued, i.e. the user-space application will hang in
DQBUF or poll() / select() indefinitely?
Thanks
Guennadi
next prev parent reply other threads:[~2016-06-13 15:33 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-12 0:17 [PATCH/RFC v2 0/4] Meta-data video device type Laurent Pinchart
2016-05-12 0:18 ` [PATCH/RFC v2 1/4] v4l: Add metadata buffer type and format Laurent Pinchart
2016-05-23 10:09 ` Hans Verkuil
2016-05-24 15:28 ` Sakari Ailus
2016-05-24 15:36 ` Hans Verkuil
2016-05-24 16:26 ` Sakari Ailus
2016-06-22 16:51 ` Laurent Pinchart
2016-06-24 23:15 ` Sakari Ailus
2016-06-22 16:32 ` Laurent Pinchart
2016-05-12 0:18 ` [PATCH/RFC v2 2/4] v4l: Add metadata video device type Laurent Pinchart
2016-05-12 21:22 ` Sakari Ailus
2016-05-12 0:18 ` [PATCH/RFC v2 3/4] v4l: Define a pixel format for the R-Car VSP1 1-D histogram engine Laurent Pinchart
2016-05-12 0:18 ` [PATCH/RFC v2 4/4] v4l: vsp1: Add HGO support Laurent Pinchart
2016-06-13 15:33 ` Guennadi Liakhovetski [this message]
2016-06-24 14:35 ` Laurent Pinchart
2016-05-13 9:26 ` [PATCH/RFC v2 0/4] Meta-data video device type Hans Verkuil
2016-05-13 9:52 ` Sakari Ailus
2016-05-16 9:20 ` Laurent Pinchart
2016-05-23 13:00 ` Guennadi Liakhovetski
2016-05-16 9:21 ` Laurent Pinchart
2016-05-17 9:26 ` Sakari Ailus
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