[RFC 1/1] v4l: async: Add some debug prints

[Sakari Ailus]

On Tue, Feb 14, 2023 at 11:25:20AM +0100, Frieder Schrempf wrote:
> Hi Sakari,
> 
> On 09.02.23 23:16, Sakari Ailus wrote:
> > Just add some debug prints for V4L2 async sub-device matching process. These
> > might come useful in figuring out why things don't work as expected.
> > 
> > Signed-off-by: Sakari Ailus <sakari.ailus at linux.intel.com>
> > ---
> > Frieder,
> > 
> > Can you try this? It prints what is being matched with what. Perhaps this
> > could be merged in a bit more refined form if it proves useful.
> > 
> > Not tested in any way.
> > 
> 
> Thanks for the patch!
> 
> I fixed a few issues (see below) and gave this patch a try. Though in my
> case it doesn't seem to help much as the problem is somewhere before the
> matching actually happens. The only output from this patch I get is:
> 
> [    1.536479] imx219 1-0010: trying to complete
> [    1.540856] imx219 1-0010: V4L2 device not available

Yeah, the problem, as I understand, is a driver bug combined with a DTS
bug... oh well.

So not a V4L2 async problem at all. :-)

-- 
Sakari Ailus