linux-kernel - Re: [PATCH] media: cedrus: Add support for additional output formats

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Message-ID: <aGL0gVwHb8eJvCEu@collins>
Date: Mon, 30 Jun 2025 22:33:05 +0200
From: Paul Kocialkowski <paulk@...-base.io>
To: Nicolas Dufresne <nicolas@...fresne.ca>
Cc: linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	Hans Verkuil <hans@...erkuil.nl>,
	Jernej Skrabec <jernej.skrabec@...l.net>
Subject: Re: [PATCH] media: cedrus: Add support for additional output formats

Hi Nicolas,

Le Mon 30 Jun 25, 15:16, Nicolas Dufresne a écrit :
> 
> Hi Paul, Jernej,
> 
> Le vendredi 23 mai 2025 à 17:43 +0200, Paul Kocialkowski a écrit :
> > From: Jernej Skrabec <jernej.skrabec@...l.net>
> > 
> > If VPU supports untiled output, it actually supports several different
> > YUV 4:2:0 layouts, namely NV12, NV21, YUV420 and YVU420.
> > 
> > Add support for all of them.
> > 
> > Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
> > Reviewed-by: Paul Kocialkowski <paulk@...-base.io>
> > ---
> > 
> > Looks like this patch never made it, sorry about that.
> > I've rebased it atop media/next and added my Reviewed-by tag.
> > ---
> >  drivers/staging/media/sunxi/cedrus/cedrus_hw.c | 18 +++++++++++++++++-
> >  .../staging/media/sunxi/cedrus/cedrus_video.c  | 18 ++++++++++++++++++
> >  2 files changed, 35 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
> > b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
> > index 32af0e96e762..168d89c5a16d 100644
> > --- a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
> > +++ b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
> > @@ -86,9 +86,25 @@ void cedrus_dst_format_set(struct cedrus_dev *dev,
> >  
> >  	switch (fmt->pixelformat) {
> >  	case V4L2_PIX_FMT_NV12:
> > +	case V4L2_PIX_FMT_NV21:
> > +	case V4L2_PIX_FMT_YUV420:
> > +	case V4L2_PIX_FMT_YVU420:
> >  		chroma_size = ALIGN(width, 16) * ALIGN(height, 16) / 2;
> >  
> > -		reg = VE_PRIMARY_OUT_FMT_NV12;
> > +		switch (fmt->pixelformat) {
> > +		case V4L2_PIX_FMT_NV12:
> > +			reg = VE_PRIMARY_OUT_FMT_NV12;
> > +			break;
> > +		case V4L2_PIX_FMT_NV21:
> > +			reg = VE_PRIMARY_OUT_FMT_NV21;
> > +			break;
> > +		case V4L2_PIX_FMT_YUV420:
> > +			reg = VE_PRIMARY_OUT_FMT_YU12;
> > +			break;
> > +		case V4L2_PIX_FMT_YVU420:
> 
> Just so its recorded, Hans added a default: case here while applying.

Thanks for the notification! I would maybe have selected NV12 instead but
I guess it doesn't really matter all that much since there should be layers
of checking before this is reached.

All the best,

Paul

> regards,
> Nicolas
> 
> > +			reg = VE_PRIMARY_OUT_FMT_YV12;
> > +			break;
> > +		}
> >  		cedrus_write(dev, VE_PRIMARY_OUT_FMT, reg);
> >  
> >  		reg = chroma_size / 2;
> > diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> > b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> > index 77f78266f406..9fae2c7493d0 100644
> > --- a/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> > +++ b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> > @@ -64,6 +64,21 @@ static struct cedrus_format cedrus_formats[] = {
> >  		.pixelformat	= V4L2_PIX_FMT_NV12_32L32,
> >  		.directions	= CEDRUS_DECODE_DST,
> >  	},
> > +	{
> > +		.pixelformat	= V4L2_PIX_FMT_NV21,
> > +		.directions	= CEDRUS_DECODE_DST,
> > +		.capabilities	= CEDRUS_CAPABILITY_UNTILED,
> > +	},
> > +	{
> > +		.pixelformat	= V4L2_PIX_FMT_YUV420,
> > +		.directions	= CEDRUS_DECODE_DST,
> > +		.capabilities	= CEDRUS_CAPABILITY_UNTILED,
> > +	},
> > +	{
> > +		.pixelformat	= V4L2_PIX_FMT_YVU420,
> > +		.directions	= CEDRUS_DECODE_DST,
> > +		.capabilities	= CEDRUS_CAPABILITY_UNTILED,
> > +	},
> >  };
> >  
> >  #define CEDRUS_FORMATS_COUNT	ARRAY_SIZE(cedrus_formats)
> > @@ -140,6 +155,9 @@ void cedrus_prepare_format(struct v4l2_pix_format
> > *pix_fmt)
> >  		break;
> >  
> >  	case V4L2_PIX_FMT_NV12:
> > +	case V4L2_PIX_FMT_NV21:
> > +	case V4L2_PIX_FMT_YUV420:
> > +	case V4L2_PIX_FMT_YVU420:
> >  		/* 16-aligned stride. */
> >  		bytesperline = ALIGN(width, 16);
> >  



-- 
Paul Kocialkowski,

Independent contractor - sys-base - https://www.sys-base.io/
Free software developer - https://www.paulk.fr/

Expert in multimedia, graphics and embedded hardware support with Linux.

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