From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: "Zhu, Mingcheng" <mingchen@quicinc.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>,
"linux-media@vger.kernel.org" <linux-media@vger.kernel.org>
Subject: Re: query video dev node name using the V4L2 device driver name
Date: Wed, 21 Dec 2011 01:34:43 +0100 [thread overview]
Message-ID: <201112210134.43822.laurent.pinchart@ideasonboard.com> (raw)
In-Reply-To: <3D233F78EE854A4BA3D34C11AD4FAC1FDEF79C@nasanexd01b.na.qualcomm.com>
Hi Mingcheng,
On Monday 19 December 2011 19:09:18 Zhu, Mingcheng wrote:
> Hi Laurent,
>
> I have a problem here. Take following example that we have two video dev
> nodes as:
> /dev/video0: this node is for WIFI capture
WIFI capture ? I'm curious about that, what do you mean exactly ?
> /dev/video1: this is the camera driver.
>
> Is it possible for the user space to find out video1 is the camera without
> open and query each video node's capabilities?
If the drivers that expose those nodes are media-controller aware, one
possible solution is to open the media controller device(s) and enumerate the
entities. I'm not sure that would be faster than opening and querying the
video nodes though.
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2011-12-21 0:34 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-15 9:50 [RFC 0/4] OMAP 3 ISP driver improvements Sakari Ailus
2011-12-15 9:50 ` [RFC 1/4] omap3isp: Implement validate_pipeline Sakari Ailus
2011-12-15 10:18 ` Laurent Pinchart
2011-12-15 11:53 ` Sakari Ailus
2011-12-15 9:50 ` [RFC 2/4] omap3isp: Add lane configuration to platform data Sakari Ailus
2011-12-15 9:50 ` [RFC 3/4] omap3isp: Configure CSI-2 phy based on " Sakari Ailus
2011-12-15 10:28 ` Laurent Pinchart
2011-12-15 11:53 ` Sakari Ailus
2011-12-15 12:54 ` Laurent Pinchart
2011-12-15 21:50 ` Sakari Ailus
2011-12-19 0:31 ` Laurent Pinchart
2011-12-19 7:17 ` Sakari Ailus
2011-12-19 10:21 ` query video dev node name using the V4L2 device driver name Zhu, Mingcheng
2011-12-19 10:31 ` Laurent Pinchart
2011-12-19 18:09 ` Zhu, Mingcheng
2011-12-21 0:34 ` Laurent Pinchart [this message]
2011-12-15 9:50 ` [RFC 4/4] omap3isp: Use pixel clock from sensor media bus frameformat Sakari Ailus
2011-12-15 10:29 ` Laurent Pinchart
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