Re: [PATCH 4/8] ispvideo: Add support for G/S/ENUM_STD ioctl

[Laurent Pinchart]

Hi Deepthy,

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.

-- 
Regards,

Laurent Pinchart
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