All of lore.kernel.org
 help / color / mirror / Atom feed
From: damateem <damateem4@gmail.com>
To: linux-media list <linux-media@vger.kernel.org>
Subject: Debug output
Date: Wed, 30 Nov 2011 19:46:11 -0500	[thread overview]
Message-ID: <4ED6CE53.7010806@gmail.com> (raw)

There are a fair number of debug print statements in the V4L2 code. How
do I turn those on?

For instance, I'd like the following code to print

if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
                !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
        v4l_print_ioctl(vfd->name, cmd);
        printk(KERN_CONT "\n");
    }

so I can trace the IOCTL calls.

Thanks,
David

             reply	other threads:[~2011-12-01  0:46 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-01  0:46 damateem [this message]
2011-12-01 19:01 ` Debug output damateem
2011-12-01 19:18   ` Mauro Carvalho Chehab
     [not found] <B50FF75CBCFA2E4E8D23F26E18F52B101850FF@mail.oerlikon.ca>
2006-08-31 15:01 ` Debug Output Abot Botbot
  -- strict thread matches above, loose matches on Subject: below --
2006-08-31  3:37 IP-Config: Failed to open eth0 kabbin
2006-08-31 14:10 ` Debug Output Abot Botbot

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=4ED6CE53.7010806@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.