On 6/10/19 5:48 AM, Tomasz Figa wrote:
> Hi Maxime,
> 
> On Sun, Jun 9, 2019 at 11:38 PM Maxime Jourdan <mjour...@baylibre.com> wrote:
>>
>> Add a enum_fmt format flag to specifically tag coded formats where
>> dynamic resolution switching is supported by the device.
>>
>> This is useful for some codec drivers that can't support dynamic
>> resolution switching for all their listed coded formats. It allows
>> userspace to know whether it should extract the video parameters itself,
>> or if it can rely on the device to send V4L2_EVENT_SOURCE_CHANGE when
>> such changes are detected.
>>
> 
> First of all, thanks for the patch!
> 
> Given the aspect of compatibility and also the general preference for
> the drivers to actually handle dynamic resolution changes, I'd suggest
> inverting the meaning of this flag. With something like
> "V4L2_FMT_FLAG_STATIC_RESOLUTION" it would be more of an exception
> rather than the default behavior.

We had a discussion about that, see this thread: 
https://lkml.org/lkml/2019/5/31/256

Regards,

        Hans

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