linux-kernel - Re: [PATCH v2 2/2] [media] v4l: Add 10/16-bits per channel YUV pixel formats

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Date:   Fri, 3 Feb 2017 12:04:35 -0200
From:   Mauro Carvalho Chehab <mchehab@...pensource.com>
To:     Sakari Ailus <sakari.ailus@....fi>
Cc:     ayaka <ayaka@...lik.info>, dri-devel@...ts.freedesktop.org,
        ville.syrjala@...ux.intel.com, randy.li@...k-chips.com,
        linux-kernel@...r.kernel.org, daniel.vetter@...el.com,
        mchehab@...nel.org, linux-media@...r.kernel.org
Subject: Re: [PATCH v2 2/2] [media] v4l: Add 10/16-bits per channel YUV
 pixel formats

Em Thu, 5 Jan 2017 20:27:17 +0200
Sakari Ailus <sakari.ailus@....fi> escreveu:

> Hi Randy,
> 
> On Thu, Jan 05, 2017 at 11:22:26PM +0800, ayaka wrote:
> > 
> > 
> > On 01/05/2017 06:30 PM, Sakari Ailus wrote:  
> > >Hi Randy,
> > >
> > >Thanks for the update.
> > >
> > >On Thu, Jan 05, 2017 at 12:29:11AM +0800, Randy Li wrote:  
> > >>The formats added by this patch are:
> > >>	V4L2_PIX_FMT_P010
> > >>	V4L2_PIX_FMT_P010M
> > >>	V4L2_PIX_FMT_P016
> > >>	V4L2_PIX_FMT_P016M
> > >>Currently, none of driver uses those format, but some video device
> > >>has been confirmed with could as those format for video output.
> > >>The Rockchip's new decoder has supported those 10 bits format for
> > >>profile_10 HEVC/AVC video.
> > >>
> > >>Signed-off-by: Randy Li <ayaka@...lik.info>
> > >>
> > >>v4l2
> > >>---
> > >>  Documentation/media/uapi/v4l/pixfmt-p010.rst  |  86 ++++++++++++++++
> > >>  Documentation/media/uapi/v4l/pixfmt-p010m.rst |  94 ++++++++++++++++++
> > >>  Documentation/media/uapi/v4l/pixfmt-p016.rst  | 126 ++++++++++++++++++++++++
> > >>  Documentation/media/uapi/v4l/pixfmt-p016m.rst | 136 ++++++++++++++++++++++++++  
> > >You need to include the formats in pixfmt.rst in order to compile the
> > >documentation.
> > >
> > >$ make htmldocs
> > >
> > >And you'll find it in Documentation/output/media/uapi/v4l/v4l2.html .
> > >
> > >In Debian you'll need to install sphinx-common and python3-sphinx-rtd-theme
> > >.  
> > OK, I would fix them in new version.
> > The view of byte order for P010 serial is left empty, it is a little hard
> > for me to use flat-table to draw them. Is there possible to use something
> > like latex to do this job?  
> 
> Hmm. Not as far as I know. We recently switched from DocBook mostly due to
> ReST being more simple to use AFAIU. I think LaTeX output could be produced
> ReST, that might not be very helpful here though.

No, you can't use LaTeX, as it won't be properly displayed on all output
formats. There are a few options to define tables in ReST, but we prefer
using flat-table because the other formats are harder to maintain at the
V4L2 uAPI documentation.

Just one note about this series: it won't be merged upstream until
someone adds a driver needing those pixel formats.

Regards,
Mauro


Thanks,
Mauro