Issue with USB Webcam dongle on i.MX6Q Sabre Lite board

Issue with USB Webcam dongle on i.MX6Q Sabre Lite board

[Sri Harsha Rentala]

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Hi,

I am a novice with the yocto project and I am currently working on a thesis
project in which I am facing an issue with the setup of a USB webcam on a
SABRE lite board by Boundary devices.
I have built the Minimal image 'core-image minimal' over which I have
installed certain components and packages for which the list is given
below.

*OS*: Ubuntu 13.10
*Board*: Sabrelite rev-D by boundary devices
*Kernel Version*: Image Name:   Linux-3.10.17-1.0.0_ga+yocto+gca

                       Image Type:   ARM Linux Kernel Image (uncompressed)
*Bitbake version*: 1.22.0

Machine name was changed to 'nitrogen6x'.

*Additional applications installed*: Gstreamer-0.10, mongoose web server
application, libav, openssh, imx-test, libxbee
*Additional hardware used*: Logitech USB webcam

When I try to access the webcam to capture video, I am unable to find the
device. Basically, the image is unable to identify it as a webcam, but only
as a USB device.
The following was my terminal output

root@nitrogen6x:~# usb 1-1.1: USB disconnect, device number 3

usb 1-1.1: new high-speed USB device number 4 using ci_hdrc

root@nitrogen6x:~# gst-launch v4l2src ! mfw_v4lsink

mxc_v4l_open: Mxc Camera no sensor ipu0/csi0

mxc_v4l_open: Mxc Camera no sensor ipu0/csi1

mxc_v4l_open: Mxc Camera no sensor ipu1/csi1

Unable to open /dev/fb0 -1mxc_v4l_open: Mxc Camera no sensor ipu0/csi0



get vscreen info failed.

set color key failed.

MFW_GST_V4LSINK_PLUGIN 3.0.11 build on Jul 30 2014 14:25:19.

Setting pipeline to PAUSED ...

ERROR: Pipeline doesn't want to pause.

ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not
open .
Additional debug info:

/home/harsha/fsl-community-bsp/build/tmp/work/cortexa9hf-vfp-neon-poky-linux-gn:
system error: Resource temporarily unavailable

Setting pipeline to NULL ...

Total rendered:0

Freeing pipeline ...

[--->FINALIZE v4l_sink

I understand that the webcam is only being identified as a USB device which
can be seen in the terminal output (in red) above. So how do I get the
dongle to identify it properly?
Do I have to install the USB driver for the webcam separately? (I looked up
to find that we don't need to, but I am not sure).

I appreciate any suggestions and directions here.

Regards
-Sri Harsha

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Re: Issue with USB Webcam dongle on i.MX6Q Sabre Lite board

[Gary Thomas]

On 2014-08-10 18:56, Sri Harsha Rentala wrote:
> Hi,
>
> I am a novice with the yocto project and I am currently working on a thesis project in which I am facing an issue with the setup of a USB webcam on a SABRE lite board by Boundary
> devices.
> I have built the Minimal image 'core-image minimal' over which I have installed certain components and packages for which the list is given below.
>
> *OS*: Ubuntu 13.10
> *Board*: Sabrelite rev-D by boundary devices
> *Kernel Version*: Image Name:   Linux-3.10.17-1.0.0_ga+yocto+gca
>                         Image Type:   ARM Linux Kernel Image (uncompressed)
> *Bitbake version*: 1.22.0
>
> Machine name was changed to 'nitrogen6x'.
>
> *Additional applications installed*: Gstreamer-0.10, mongoose web server application, libav, openssh, imx-test, libxbee
> *Additional hardware used*: Logitech USB webcam
>
> When I try to access the webcam to capture video, I am unable to find the device. Basically, the image is unable to identify it as a webcam, but only as a USB device.
> The following was my terminal output
>
> root@nitrogen6x:~# usb 1-1.1: USB disconnect, device number 3
> usb 1-1.1: new high-speed USB device number 4 using ci_hdrc
>
> root@nitrogen6x:~# gst-launch v4l2src ! mfw_v4lsink
> mxc_v4l_open: Mxc Camera no sensor ipu0/csi0
> mxc_v4l_open: Mxc Camera no sensor ipu0/csi1
> mxc_v4l_open: Mxc Camera no sensor ipu1/csi1
> Unable to open /dev/fb0 -1mxc_v4l_open: Mxc Camera no sensor ipu0/csi0
> get vscreen info failed.
> set color key failed.
> MFW_GST_V4LSINK_PLUGIN 3.0.11 build on Jul 30 2014 14:25:19.
> Setting pipeline to PAUSED ...
> ERROR: Pipeline doesn't want to pause.
> ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could not open .
> Additional debug info:
> /home/harsha/fsl-community-bsp/build/tmp/work/cortexa9hf-vfp-neon-poky-linux-gn:
> system error: Resource temporarily unavailable
> Setting pipeline to NULL ...
> Total rendered:0
> Freeing pipeline ...
> [--->FINALIZE v4l_sink
>
> I understand that the webcam is only being identified as a USB device which can be seen in the terminal output (in red) above. So how do I get the dongle to identify it properly?
> Do I have to install the USB driver for the webcam separately? (I looked up to find that we don't need to, but I am not sure).
>
> I appreciate any suggestions and directions here.

What Logitech camera are you trying to use (Logitech has
tons of models, all slightly different)?  Have you successfully
used this camera with other Linux systems, e.g. your desktop?

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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