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

[Frieder Schrempf]

On 14.02.23 15:56, Sakari Ailus wrote:
> 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. :-)

Correct! Thanks for your help anyway!