[PATCH v2 0/4] Add debug messages to v4l2-ctrls

[Ezequiel Garcia <ezequiel@collabora.com>]

v2:
  * Print the video device node name where possible, in v4l2-ctrls.c,
    by passing the struct video_device as a parameter.
  * Added a warning to dev_debug attribute store, to warn
    the user about V4L2_DEV_DEBUG_CTRL being a no-op for dev_debug.

Even though the goal was fairly simple (adding debug to v4l2-ctrls)
it ended up spanning this little patchset.

The motivation for this cleanup is being able to turn on/off
debugging messages in v4l2-ctrls.c, using a knob common to the
videodev driver's core.

So, in addition to the dev_debug attribute, this series introduces
a debug module parameter, and a new debug level, which enables
v4l2-ctrl debugging.

Having this is quite useful when bringing-up stateless codecs,
using the Request API.

Ezequiel Garcia (4):
  media: v4l: Simplify dev_debug flags
  media: v4l: Improve debug dprintk macro
  media: v4l: Add a module parameter to control global debugging
  media: v4l: ctrls: Add debug messages

 drivers/media/v4l2-core/v4l2-ctrls.c  | 93 +++++++++++++++++++++------
 drivers/media/v4l2-core/v4l2-dev.c    | 47 ++++++--------
 drivers/media/v4l2-core/v4l2-ioctl.c  |  8 +--
 drivers/media/v4l2-core/v4l2-subdev.c |  4 +-
 include/media/v4l2-ctrls.h            |  9 ++-
 include/media/v4l2-ioctl.h            |  2 +
 6 files changed, 110 insertions(+), 53 deletions(-)

-- 
2.20.1