On 07/10/2016 04:17 PM, Ian Arkver wrote: > On 10/07/16 13:55, Hans Verkuil wrote: >> On 07/10/2016 02:10 PM, Lars-Peter Clausen wrote: >>> On 07/09/2016 11:36 PM, Steve Longerbeam wrote: >>>> >>>> On 07/09/2016 02:10 PM, Steve Longerbeam wrote: >>>>> >>>>> On 07/09/2016 11:59 AM, Steve Longerbeam wrote: >>>>>> >>>>>> On 07/07/2016 07:52 AM, Lars-Peter Clausen wrote: >>>>>>> On 07/07/2016 12:59 AM, Steve Longerbeam wrote: >>>>>>>> Add a device tree boolean property "bt656-4" to allow setting >>>>>>>> the ITU-R BT.656-4 compatible bit. >>>>>>>> >>>>>>>> Signed-off-by: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx> >>>>>>> + /* select ITU-R BT.656-4 compatible? */ >> Please don't use the '-4': BT.656 is sufficient. The -4 is just the version >> number of the standard (and 5 is the latest anyway). > From the ADV7180 DS [1]: > > BT.656-4, ITU-R BT.656-4 Enable, Address 0x04[7] > > Between Revision 3 and Revision 4 of the ITU-R BT.656 standards, the ITU > has changed the toggling position for the V bit within the SAV EAV codes > for NTSC. The ITU-R BT.656-4 standard bit allows the user to select an > output mode that is compliant with either the previous or new standard. > For further information, visit the International Telecommunication Union > website. > > Note that the standard change only affects NTSC and has no bearing on PAL. > > When ITU-R BT.656-4 is 0 (default), the ITU-R BT.656-3 specification is > used. The V bit goes low at EAV of Line 10 and Line 273. > > When ITU-R BT.656-4 is 1, the ITU-R BT.656-4 specification is used. The > V bit goes low at EAV of Line 20 and Line 283. > > [1]www.analog.com/media/en/technical-documentation/data-sheets/*ADV7180*.pdf Rev 4 came in in 1998. I would say that that is the default. We have had any problems with this and I would need some proof that this is really needed. Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
