linux-kernel - Re: [PATCH v5 15/22] media: rzg2l-cru: Make use of v4l2_format

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Message-ID: <20241018122611.GN30496@pendragon.ideasonboard.com>
Date: Fri, 18 Oct 2024 15:26:11 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil-cisco@...all.nl>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v5 15/22] media: rzg2l-cru: Make use of
 v4l2_format_info() helpers

On Fri, Oct 18, 2024 at 12:45:36PM +0100, Lad, Prabhakar wrote:
> On Tue, Oct 15, 2024 at 11:33 AM Laurent Pinchart wrote:
> > On Fri, Oct 11, 2024 at 06:30:45PM +0100, Prabhakar wrote:
> > > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > >
> > > Make use of v4l2_format_info() helpers to determine the input and
> > > output formats.
> > >
> > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > > ---
> > >  .../platform/renesas/rzg2l-cru/rzg2l-video.c  | 22 ++++++-------------
> > >  1 file changed, 7 insertions(+), 15 deletions(-)
> > >
> > > diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> > > index 8932fab7c656..0cc69a7440bf 100644
> > > --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> > > +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> > > @@ -300,21 +300,12 @@ static void rzg2l_cru_initialize_axi(struct rzg2l_cru_dev *cru)
> > >       rzg2l_cru_write(cru, AMnAXIATTR, amnaxiattr);
> > >  }
> > >
> > > -static void rzg2l_cru_csi2_setup(struct rzg2l_cru_dev *cru, bool *input_is_yuv,
> > > +static void rzg2l_cru_csi2_setup(struct rzg2l_cru_dev *cru,
> > >                                const struct rzg2l_cru_ip_format *ip_fmt,
> > >                                u8 csi_vc)
> > >  {
> > >       u32 icnmc = ICnMC_INF(ip_fmt->datatype);
> > >
> > > -     switch (ip_fmt->code) {
> > > -     case MEDIA_BUS_FMT_UYVY8_1X16:
> > > -             *input_is_yuv = true;
> > > -             break;
> > > -     default:
> > > -             *input_is_yuv = false;
> > > -             break;
> > > -     }
> > > -
> > >       icnmc |= (rzg2l_cru_read(cru, ICnMC) & ~ICnMC_INF_MASK);
> > >
> > >       /* Set virtual channel CSI2 */
> > > @@ -327,19 +318,17 @@ static int rzg2l_cru_initialize_image_conv(struct rzg2l_cru_dev *cru,
> > >                                          struct v4l2_mbus_framefmt *ip_sd_fmt,
> > >                                          u8 csi_vc)
> > >  {
> > > +     const struct v4l2_format_info *src_finfo, *dst_finfo;
> > >       const struct rzg2l_cru_ip_format *cru_ip_fmt;
> > > -     bool output_is_yuv = false;
> > > -     bool input_is_yuv = false;
> > >       u32 icndmr;
> > >
> > >       cru_ip_fmt = rzg2l_cru_ip_code_to_fmt(ip_sd_fmt->code);
> > > -     rzg2l_cru_csi2_setup(cru, &input_is_yuv, cru_ip_fmt, csi_vc);
> > > +     rzg2l_cru_csi2_setup(cru, cru_ip_fmt, csi_vc);
> > >
> > >       /* Output format */
> > >       switch (cru->format.pixelformat) {
> > >       case V4L2_PIX_FMT_UYVY:
> > >               icndmr = ICnDMR_YCMODE_UYVY;
> > > -             output_is_yuv = true;
> > >               break;
> > >       default:
> > >               dev_err(cru->dev, "Invalid pixelformat (0x%x)\n",
> > > @@ -347,8 +336,11 @@ static int rzg2l_cru_initialize_image_conv(struct rzg2l_cru_dev *cru,
> > >               return -EINVAL;
> > >       }
> > >
> > > +     src_finfo = v4l2_format_info(cru_ip_fmt->format);
> > > +     dst_finfo = v4l2_format_info(cru->format.pixelformat);
> >
> > It would be a bit more efficient to add a yuv boolean field to the
> > rzg2l_cru_ip_format structure, as you already have looked up cru_ip_fmt
> > for the IP subdev format.
>
> I will consider this change, when adding support for the RZ/V2H SoC,
> hope that's OK for you.

It's not a blocker, it can be done on top indeed. If you end up
submitting a v6 you could add a patch on top already, but otherwise
later is fine too.

> > Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
> >
> > > +
> > >       /* If input and output use same colorspace, do bypass mode */
> > > -     if (output_is_yuv == input_is_yuv)
> > > +     if (v4l2_is_format_yuv(src_finfo) == v4l2_is_format_yuv(dst_finfo))
> > >               rzg2l_cru_write(cru, ICnMC,
> > >                               rzg2l_cru_read(cru, ICnMC) | ICnMC_CSCTHR);
> > >       else

-- 
Regards,

Laurent Pinchart