linux-kernel - Re: i.MX6 MIPI-CSI2 OV5640 Camera testing on Mainline Linux

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180531190659.xdp4q2cjro33aihq@pengutronix.de>
Date:   Thu, 31 May 2018 21:06:59 +0200
From:   Philipp Zabel <pza@...gutronix.de>
To:     Jagan Teki <jagan@...rulasolutions.com>
Cc:     Steve Longerbeam <steve_longerbeam@...tor.com>,
        Fabio Estevam <fabio.estevam@....com>,
        Discussion of the development of and with GStreamer 
        <gstreamer-devel@...ts.freedesktop.org>,
        linux-media@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: i.MX6 MIPI-CSI2 OV5640 Camera testing on Mainline Linux

Hi Jagan,

On Thu, May 31, 2018 at 08:39:20PM +0530, Jagan Teki wrote:
> Hi All,
> 
> I'm trying to verify MIPI-CSI2 OV5640 camera on i.MX6 platform with
> Mainline Linux.
> 
> I've followed these[1] instructions to configure MC links and pads
> based on the probing details from dmesg and trying to capture
> ipu1_ic_prpenc capture (/dev/video1) but it's not working.
> 
> Can anyone help me to verify whether I configured all the details
> properly if not please suggest.
> 
> I'm pasting full log here, so-that anyone can comment in line and dt
> changes are at [2]
> 
> Log:
> -----
[...]
> # media-ctl -l "'ov5640 2-003c':0 -> 'imx6-mipi-csi2':0[1]"
> # media-ctl -l "'imx6-mipi-csi2':2 -> 'ipu1_csi1':0[1]"
> # media-ctl -l "'ipu1_csi1':1 -> 'ipu1_ic_prp':0[1]"
> # media-ctl -l "'ipu1_ic_prp':1 -> 'ipu1_ic_prpenc':0[1]"
> # media-ctl -l "'ipu1_ic_prpenc':1 -> 'ipu1_ic_prpenc capture':0[1]"

Here you configure a pipeline that ends at ipu1 prpenc capture ...

> # med# media-ctl -p
[...]
> - entity 18: ipu1_ic_prpenc capture (1 pad, 1 link)
>              type Node subtype V4L flags 0
>              device node name /dev/video0

... which is /dev/video0 ...

[...]
> - entity 27: ipu1_ic_prpvf capture (1 pad, 1 link)
>              type Node subtype V4L flags 0
>              device node name /dev/video1

... not /dev/video1 ...

[...]
> # GST_DEBUG="v4l2*:5" gst-launch-1.0 -v v4l2src device=/dev/video1 ! \
> > autovideosink

... and then you try to capture from prpvf, which is not part of a
configured pipeline.

regards
Philipp