Am Dienstag, den 11.02.2014, 16:23 +0100 schrieb Laurent Pinchart:

Hi Russell,

On Tuesday 11 February 2014 14:52:48 Russell King - ARM Linux wrote:

quoted

On Tue, Feb 11, 2014 at 07:56:33AM -0600, Rob Herring wrote:

quoted

On Tue, Feb 11, 2014 at 5:45 AM, Philipp Zabel wrote:

quoted

This allows to reuse the same parser code from outside the V4L2
framework, most importantly from display drivers. There have been
patches that duplicate the code (and I am going to send one of my own),
such as
http://lists.freedesktop.org/archives/dri-devel/2013-August/043308.html
and others that parse the same binding in a different way:
https://www.mail-archive.com/linux-omap@vger.kernel.org/msg100761.html

I think that all common video interface parsing helpers should be moved
to a single place, outside of the specific subsystems, so that it can
be reused by all drivers.

Perhaps that should be done rather than moving to drivers/of now and
then again to somewhere else.

Do you have a better suggestion where it should move to?

drivers/gpu/drm - no, because v4l2 wants to use it
drivers/media/video - no, because DRM drivers want to use it
drivers/video - no, because v4l2 and drm drivers want to use it

Just pointing out a missing location (which might be rejected due to similar 
concerns), there's also drivers/media, which isn't V4L-specific.

Since drivers/Makefile has media/ in obj-y, moving the graph helpers to
drivers/media should technically work.

quoted

Maybe drivers/of-graph/ ?  Or maybe it's just as good a place to move it
into drivers/of ?

include/media/of_graph.h,
drivers/media/of_graph.c?

regards
Philipp