linux-kernel - Re: Re: [RFC PATCH 2/8] media: Add P010 format

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Message-ID: <73f460d843cee2781c9d08cdc421f0fd64f9ccc7.camel@ndufresne.ca>
Date:   Mon, 28 Feb 2022 12:02:04 -0500
From:   Nicolas Dufresne <nicolas@...fresne.ca>
To:     Jernej Škrabec <jernej.skrabec@...il.com>,
        ezequiel@...guardiasur.com.ar, p.zabel@...gutronix.de
Cc:     mchehab@...nel.org, hverkuil-cisco@...all.nl,
        gregkh@...uxfoundation.org, wens@...e.org, samuel@...lland.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Subject: Re: Re: [RFC PATCH 2/8] media: Add P010 format

Le lundi 28 février 2022 à 17:32 +0100, Jernej Škrabec a écrit :
> Dne ponedeljek, 28. februar 2022 ob 13:48:53 CET je Nicolas Dufresne 
> napisal(a):
> > Le dimanche 27 février 2022 à 15:49 +0100, Jernej Skrabec a écrit :
> > > Add P010 format, which is commonly used for 10-bit videos.
> > 
> > There is a much more complete patch that was sent previously (with 
> documentation
> > and all):
> > 
> > https://patchwork.kernel.org/project/linux-rockchip/patch/
> 20210618131526.566762-5-benjamin.gaignard@...labora.com/
> 
> Great, I'll take it for next revision. Although I'm not sure what "much more 
> complete" means. Only additional thing is documentation.

When adding uAPI, doc is really important, so having the format documented means
the other patch is "much more" ready to be merged.

cheers,
Nicolas

> 
> Best regards,
> Jernej
> 
> > 
> > regards,
> > Nicolas
> > 
> > > 
> > > Signed-off-by: Jernej Skrabec <jernej.skrabec@...il.com>
> > > ---
> > >  drivers/media/v4l2-core/v4l2-common.c | 2 ++
> > >  drivers/media/v4l2-core/v4l2-ioctl.c  | 1 +
> > >  include/uapi/linux/videodev2.h        | 1 +
> > >  3 files changed, 4 insertions(+)
> > > 
> > > diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-
> core/v4l2-common.c
> > > index 1db0020e08c0..4ede36546e9c 100644
> > > --- a/drivers/media/v4l2-core/v4l2-common.c
> > > +++ b/drivers/media/v4l2-core/v4l2-common.c
> > > @@ -275,6 +275,8 @@ const struct v4l2_format_info *v4l2_format_info(u32 
> format)
> > >  		{ .format = V4L2_PIX_FMT_YUV422P, .pixel_enc = 
> V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, 
> .hdiv = 2, .vdiv = 1 },
> > >  		{ .format = V4L2_PIX_FMT_GREY,    .pixel_enc = 
> V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, 
> .hdiv = 1, .vdiv = 1 },
> > >  
> > > +		{ .format = V4L2_PIX_FMT_P010,    .pixel_enc = 
> V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, 
> .hdiv = 2, .vdiv = 2 },
> > > +
> > >  		/* Tiled YUV formats */
> > >  		{ .format = V4L2_PIX_FMT_NV12_4L4, .pixel_enc = 
> V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, 
> .hdiv = 2, .vdiv = 2 },
> > >  		{ .format = V4L2_PIX_FMT_P010_4L4, .pixel_enc = 
> V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 2, .bpp = { 2, 4, 0, 0 }, 
> .hdiv = 2, .vdiv = 2 },
> > > diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-
> core/v4l2-ioctl.c
> > > index 048f326c57b9..a8d999e23e5b 100644
> > > --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> > > +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> > > @@ -1295,6 +1295,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc 
> *fmt)
> > >  	case V4L2_PIX_FMT_M420:		descr = "YUV 4:2:0 
> (M420)"; break;
> > >  	case V4L2_PIX_FMT_NV12:		descr = "Y/CbCr 4:2:0"; break;
> > >  	case V4L2_PIX_FMT_NV21:		descr = "Y/CrCb 4:2:0"; break;
> > > +	case V4L2_PIX_FMT_P010:		descr = "10-bit Y/CbCr 4:2:0"; 
> break;
> > >  	case V4L2_PIX_FMT_NV16:		descr = "Y/CbCr 4:2:2"; break;
> > >  	case V4L2_PIX_FMT_NV61:		descr = "Y/CrCb 4:2:2"; break;
> > >  	case V4L2_PIX_FMT_NV24:		descr = "Y/CbCr 4:4:4"; break;
> > > diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/
> videodev2.h
> > > index 772dbadd1a24..211bc11a48cb 100644
> > > --- a/include/uapi/linux/videodev2.h
> > > +++ b/include/uapi/linux/videodev2.h
> > > @@ -597,6 +597,7 @@ struct v4l2_pix_format {
> > >  /* two planes -- one Y, one Cr + Cb interleaved  */
> > >  #define V4L2_PIX_FMT_NV12    v4l2_fourcc('N', 'V', '1', '2') /* 12  Y/CbCr 
> 4:2:0  */
> > >  #define V4L2_PIX_FMT_NV21    v4l2_fourcc('N', 'V', '2', '1') /* 12  Y/CrCb 
> 4:2:0  */
> > > +#define V4L2_PIX_FMT_P010    v4l2_fourcc('P', '0', '1', '0') /* 24  Y/CbCr 
> 4:2:0 10-bit */
> > >  #define V4L2_PIX_FMT_NV16    v4l2_fourcc('N', 'V', '1', '6') /* 16  Y/CbCr 
> 4:2:2  */
> > >  #define V4L2_PIX_FMT_NV61    v4l2_fourcc('N', 'V', '6', '1') /* 16  Y/CrCb 
> 4:2:2  */
> > >  #define V4L2_PIX_FMT_NV24    v4l2_fourcc('N', 'V', '2', '4') /* 24  Y/CbCr 
> 4:4:4  */
> > 
> > 
> 
>