From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: "Ravi, Deepthy" <deepthy.ravi@ti.com>
Cc: "linux-media@vger.kernel.org" <linux-media@vger.kernel.org>,
"tony@atomide.com" <tony@atomide.com>,
"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
"linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"mchehab@infradead.org" <mchehab@infradead.org>,
"g.liakhovetski@gmx.de" <g.liakhovetski@gmx.de>,
"Hiremath, Vaibhav" <hvaibhav@ti.com>
Subject: Re: [PATCH 4/8] ispvideo: Add support for G/S/ENUM_STD ioctl
Date: Fri, 16 Sep 2011 15:06:16 +0200 [thread overview]
Message-ID: <201109161506.16505.laurent.pinchart@ideasonboard.com> (raw)
In-Reply-To: <ADF30F4D7BDE934D9B632CE7D5C7ACA4047C4D09083D@dbde03.ent.ti.com>
Hi Deepthy,
On Friday 16 September 2011 15:00:53 Ravi, Deepthy wrote:
> On Thursday, September 08, 2011 10:51 PM Laurent Pinchart wrote:
> > On Thursday 08 September 2011 15:35:22 Deepthy Ravi wrote:
> >> From: Vaibhav Hiremath <hvaibhav@ti.com>
> >>
> >> In order to support TVP5146 (for that matter any video decoder),
> >> it is important to support G/S/ENUM_STD ioctl on /dev/videoX
> >> device node.
> >
> > Why so ? Shouldn't it be queried on the subdev output pad directly ?
>
> Because standard v4l2 application for analog devices will call these std
> ioctls on the streaming device node. So it's done on /dev/video to make the
> existing apllication work.
Existing applications can't work with the OMAP3 ISP (and similar complex
embedded devices) without userspace support anyway, either in the form of a
GStreamer element or a libv4l plugin. I still believe that analog video
standard operations should be added to the subdev pad operations and exposed
through subdev device nodes, exactly as done with formats.
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2011-09-16 13:06 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-08 13:35 Deepthy Ravi
2011-09-08 17:21 ` Laurent Pinchart
2011-09-16 13:00 ` Ravi, Deepthy
2011-09-16 13:06 ` Laurent Pinchart [this message]
2011-09-19 15:31 ` Hiremath, Vaibhav
2011-09-27 18:06 ` Laurent Pinchart
2011-09-28 6:10 ` Hiremath, Vaibhav
2011-09-28 9:28 ` Sakari Ailus
2011-09-27 22:31 ` Mauro Carvalho Chehab
2011-09-27 22:49 ` Gary Thomas
2011-09-28 9:58 ` Mauro Carvalho Chehab
2011-09-08 21:38 ` Sakari Ailus
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