Le 12/08/2016 à 15:17, Hans Verkuil a écrit :
> On 08/04/2016 05:39 PM, Charles-Antoine Couret wrote:
> 
> A commit log is missing here.

Yeah I will fix that.

>> diff --git a/Documentation/media/uapi/v4l/vidioc-g-dv-timings.rst 
>> b/Documentation/media/uapi/v4l/vidioc-g-dv-timings.rst
>> index f7bf21f..0205bf6 100644
>> --- a/Documentation/media/uapi/v4l/vidioc-g-dv-timings.rst
>> +++ b/Documentation/media/uapi/v4l/vidioc-g-dv-timings.rst
>> @@ -339,6 +339,14 @@ EBUSY
>>  
>>         -  The timings follow the VESA Generalized Timings Formula standard
>>  
>> +    -  .. row 7
>> +
>> +       -  ``V4L2_DV_BT_STD_SDI``
>> +
>> +       -  The timings follow the SDI Timings standard.
>> +      There are not always horizontal syncs/porches or similar in this 
>> format.
>> +      If it is not precised by standard, blanking timings must be set in
>> +      hsync or vsync fields by default.
> 
> OK. This is confusing. The text was changed after my question about something 
> porch-like
> in the SMPTE-125M standard. But I see nothing like that after re-reading it.
> 
> So what sort of 'porch' timing were you thinking of?

In SMPTE-125M for example, the time between the real horizontal blanking is 
precised (16 pixelclock).
For me it looks like front porch timing.
 
> I wonder if I shouldn't just use the text from your first patch:
> 
>        -  ``V4L2_DV_BT_STD_SDI``
> 
>        -  The timings follow the SDI Timings standard.
>         There are no horizontal syncs/porches at all in this format.
>         Total blanking timings must be set in hsync or vsync fields only.

I agree with that if you prefer, after all the front/backporch are probably 
irrelevant in this case.
So, if you confirm this way, I would send you another patchset to fix that.

Thank you.
Regards,
Charles-Antoine Couret
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