Hi Mauro, On Wednesday 28 September 2011 00:31:32 Mauro Carvalho Chehab wrote: > Em 19-09-2011 12:31, Hiremath, Vaibhav escreveu: > > On Friday, September 16, 2011 6:36 PM Laurent Pinchart wrote: > >> On Friday 16 September 2011 15:00:53 Ravi, Deepthy wrote: > >>> On Thursday, September 08, 2011 10:51 PM Laurent Pinchart wrote: > >>>> On Thursday 08 September 2011 15:35:22 Deepthy Ravi wrote: > >>>>> From: Vaibhav Hiremath <hvaibhav@xxxxxx> > >>>>> > >>>>> In order to support TVP5146 (for that matter any video decoder), > >>>>> it is important to support G/S/ENUM_STD ioctl on /dev/videoX > >>>>> device node. > >>>> > >>>> Why so ? Shouldn't it be queried on the subdev output pad directly ? > >>> > >>> Because standard v4l2 application for analog devices will call these > >>> std ioctls on the streaming device node. So it's done on /dev/video to > >>> make the existing apllication work. > >> > >> Existing applications can't work with the OMAP3 ISP (and similar complex > >> embedded devices) without userspace support anyway, either in the form > >> of a GStreamer element or a libv4l plugin. I still believe that analog > >> video standard operations should be added to the subdev pad operations > >> and exposed through subdev device nodes, exactly as done with formats. > > > > I completely agree with your point that, existing application will not > > work without setting links properly. But I believe the assumption here > > is, media-controller should set the links (along with pad formants) and > > all existing application should work as is. Isn't it? > > Yes. > > > The way it is being done currently is, set the format at the pad level > > which is same as analog standard resolution and use existing application > > for streaming... > > Yes. > > > I am ok, if we add s/g/enum_std api support at sub-dev level but this > > should also be supported on streaming device node. > > Agreed. Standards selection should be done at device node, just like any > other device. No. Please see my reply to Vaibhav's e-mail. Standard selection should be done on the subdev pads, for the exact same reason why formats and selection rectangles are configured on subdev pads. -- Regards, Laurent Pinchart -- 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
