public inbox for linux-media@vger.kernel.org
 help / color / mirror / Atom feed
From: damateem <damateem4@gmail.com>
To: linux-media list <linux-media@vger.kernel.org>
Subject: select() timeout in video capture example
Date: Fri, 11 Nov 2011 11:46:26 -0500	[thread overview]
Message-ID: <4EBD5162.2010406@gmail.com> (raw)

I'm trying to use a dm355-leopardboard to capture images.

When I execute the capture example from the Video for Linux Two API 
Specification: Revision 0.24 
(http://v4l2spec.bytesex.org/spec/a16706.htm), it always time's out on 
the select() call. I'm not sure where to start looking for the cause of 
this problem. The ccdc and camera are passing registration.

[    2.020000] vpfe_init
[    2.020000] vpfe-capture: vpss clock vpss_master enabled
[    2.030000] vpfe-capture: vpss clock vpss_slave enabled
[    2.040000] vpfe-capture vpfe-capture: v4l2 device registered
[    2.040000] vpfe-capture vpfe-capture: video device registered
[    2.050000] mt9v113 1-003c: Detected a mt9v113 chip ID 2280
[    2.170000] mt9v113 1-003c: mt9v113 1-003c decoder driver registered !!
[    2.180000] vpfe-capture vpfe-capture: v4l2 sub device mt9v113 registered
[    2.190000] vpfe_register_ccdc_device: DM355 CCDC
[    2.190000] DM355 CCDC is registered with vpfe.

Furthermore, by inspecting the electrical interface to the camera, I 
have verified that the camera is transmitting pixel data.

What things would cause select() to timeout? Should I look for something 
in the drivers?

I'm using kernel version  Arago/2.6.31+2.6.32-rc2-r52+gitr.

Thanks,
David

                 reply	other threads:[~2011-11-11 16:48 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4EBD5162.2010406@gmail.com \
    --to=damateem4@gmail.com \
    --cc=linux-media@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox