Hi Manjunath, On Thursday 19 July 2012 11:33:56 Hadli, Manjunath wrote: > On Wed, Jul 18, 2012 at 16:35:18, Laurent Pinchart wrote: > > On Tuesday 17 July 2012 12:22:42 Hadli, Manjunath wrote: > > > On Tue, Jul 17, 2012 at 17:25:42, Laurent Pinchart wrote: > > > > 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.ha...@ti.com> > > > > > > > Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com> > > > > > > > Cc: Sakari Ailus <sakari.ai...@iki.fi> > > > > > > > Cc: Hans Verkuil <hans.verk...@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 ? > > > > > > Sorry about that. The Resizer in Dm365 can take only chroma and resize > > > the buffer. It can also take luma of course. In general it can take UV8, > > > Y8 and also UYVY. > > > > So UV8 is used to resize an NV buffer in two passes (first Y8 then UV8) ? > > No. The resizer can take has a capability to resize UV8 alone. Apart from > this I don't see any use case for UV8.
Right, but what is standalone UV8 useful for ? Y8 images make sense, but an image made of UV8 data only doesn't sound very useful to me. NV formats are made of a Y8 plane and a UV8 plane, so UV8 resizing could be used to resize an NV image in two passes (resizing the Y8 plane first, then the UV8 plane). That's the only use case I see, and in that case I wonder whether the driver shouldn't expose NV resizing capabilities to userspace and run the two passes internally. > (Hans, Sakari, Guennadi, any opinion on exposing UV8 to user?) -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
