Re: [PATCH v4 1/2] media: add new mediabus format enums for dm365

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Manjunath,

On Tuesday 17 July 2012 11:41:11 Hadli, Manjunath wrote:
> On Tue, Jul 17, 2012 at 16:26:24, Laurent Pinchart wrote:
> > On Friday 30 March 2012 10:09:13 Hadli, Manjunath wrote:
> > > add new enum entries for supporting the media-bus formats on dm365.
> > > These include some bayer and some non-bayer formats.
> > > V4L2_MBUS_FMT_YDYC8_1X16 and V4L2_MBUS_FMT_UV8_1X8 are used
> > > internal to the hardware by the resizer.
> > > V4L2_MBUS_FMT_SBGGR10_ALAW8_1X8 represents the bayer ALAW format
> > > that is supported by dm365 hardware.
> > > 
> > > Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
> > > Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > > Cc: Sakari Ailus <sakari.ailus@iki.fi>
> > > Cc: Hans Verkuil <hans.verkuil@cisco.com>
> > > ---
> > > 
> > >  Documentation/DocBook/media/v4l/subdev-formats.xml |  171  ++++++++++++
> > >  include/linux/v4l2-mediabus.h                      |   10 +-
> > >  2 files changed, 179 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/Documentation/DocBook/media/v4l/subdev-formats.xml
> > > b/Documentation/DocBook/media/v4l/subdev-formats.xml index
> > > 49c532e..48d92bb
> > > 100644
> > > --- a/Documentation/DocBook/media/v4l/subdev-formats.xml
> > > +++ b/Documentation/DocBook/media/v4l/subdev-formats.xml

[snip]

> > > @@ -965,6 +1036,56 @@
> > >  	      <entry>y<subscript>1</subscript></entry>
> > >  	      <entry>y<subscript>0</subscript></entry>
> > >  	    </row>
> > > +	    <row id="V4L2-MBUS-FMT-UV8-1X8">
> > 
> > That's a weird one. Just out of curiosity, what's the point of
> > transferring chroma information without luma ?
> 
> DM365 supports this format.

Right, but what is it used for ?

[snip]

> > > @@ -2415,6 +2536,56 @@
> > >  	      <entry>u<subscript>1</subscript></entry>
> > >  	      <entry>u<subscript>0</subscript></entry>
> > >  	    </row>
> > > +	    <row id="V4L2-MBUS-FMT-YDYC8-1X16">
> > 
> > What is this beast ? We at least need a textual description, as I have no
> > idea what the format corresponds to.
> 
> This was discussed earlier over here
> http://patchwork.linuxtv.org/patch/8843/

My bad, I should have remembered that. Please add a textual description of the 
format, it's not clear from the name what D and C are.

-- 
Regards,

Laurent Pinchart