linux-kernel - Re: [PATCH v3 3/9] DocBook/v4l: Add compressed video formats used on MT8173 codec driver

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Date:	Mon, 11 Jul 2016 10:56:11 +0800
From:	tiffany lin <tiffany.lin@...iatek.com>
To:	Hans Verkuil <hverkuil@...all.nl>
CC:	Hans Verkuil <hans.verkuil@...co.com>,
	<daniel.thompson@...aro.org>, "Rob Herring" <robh+dt@...nel.org>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Pawel Osciak <posciak@...omium.org>,
	Eddie Huang <eddie.huang@...iatek.com>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-media@...r.kernel.org>,
	<linux-mediatek@...ts.infradead.org>, <PoChun.Lin@...iatek.com>
Subject: Re: [PATCH v3 3/9] DocBook/v4l: Add compressed video formats used
 on MT8173 codec driver

Hi Hans,

On Fri, 2016-07-08 at 12:23 +0200, Hans Verkuil wrote:
> On 05/30/2016 02:29 PM, Tiffany Lin wrote:
> > Add V4L2_PIX_FMT_MT21 documentation
> > 
> > Signed-off-by: Tiffany Lin <tiffany.lin@...iatek.com>
> > ---
> >  Documentation/DocBook/media/v4l/pixfmt.xml |    6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/Documentation/DocBook/media/v4l/pixfmt.xml b/Documentation/DocBook/media/v4l/pixfmt.xml
> > index 5a08aee..d40e0ce 100644
> > --- a/Documentation/DocBook/media/v4l/pixfmt.xml
> > +++ b/Documentation/DocBook/media/v4l/pixfmt.xml
> > @@ -1980,6 +1980,12 @@ array. Anything what's in between the UYVY lines is JPEG data and should be
> >  concatenated to form the JPEG stream. </para>
> >  </entry>
> >  	  </row>
> > +	  <row id="V4L2_PIX_FMT_MT21">
> > +	    <entry><constant>V4L2_PIX_FMT_MT21</constant></entry>
> > +	    <entry>'MT21'</entry>
> > +	    <entry>Compressed two-planar YVU420 format used by Mediatek MT8173
> > +	    codec driver.</entry>
> 
> Can you give a few more details? The encoder driver doesn't seem to produce this
> format, so who is creating this? Where is this format documented?
> 

It can be as input format for encoder, MDP and display drivers in our
platform.
This private format is only available in our platform.
So I put it in "Reserved Format Identifiers" sections.


best regards,
Tiffany

> Regards,
> 
> 	Hans
> 
> > +	  </row>
> >  	</tbody>
> >        </tgroup>
> >      </table>
> >