linux-kernel - Re: [PATCH v3 15/17] media: rzg2l-cru: Refactor ICnDMR register configuration

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Message-ID: <CA+V-a8vCpqH+EFoRSox3PwVfz_koG4wddRdW0KL8Fcgq3OyGyw@mail.gmail.com>
Date: Thu, 3 Oct 2024 21:20:56 +0100
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>, 
	Mauro Carvalho Chehab <mchehab@...nel.org>, Hans Verkuil <hverkuil-cisco@...all.nl>, 
	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 v3 15/17] media: rzg2l-cru: Refactor ICnDMR register configuration

Hi Laurent,

Thank you for the review.

On Thu, Oct 3, 2024 at 3:34 PM Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
>
> On Tue, Oct 01, 2024 at 03:09:17PM +0100, Prabhakar wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> >
> > Refactor the ICnDMR register configuration in
> > `rzg2l_cru_initialize_image_conv()` by adding a new member `icndmr` in the
> > `rzg2l_cru_ip_format` structure.
> >
> > Suggested-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > ---
> > v2->v3
> > - Updated subject line and commit message
> > - Re-used rzg2l_cru_ip_format_to_fmt() to fetch icndmr details
> > - Collected RB tag
> >
> > v1->v2
> > - New patch
> > ---
> >  drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h   |  4 ++++
> >  drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c    |  1 +
> >  drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c | 10 ++++------
> >  3 files changed, 9 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h
> > index 39296a59b3da..51206373b7fe 100644
> > --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h
> > +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h
> > @@ -31,6 +31,8 @@
> >  #define RZG2L_CRU_MIN_INPUT_HEIGHT   240
> >  #define RZG2L_CRU_MAX_INPUT_HEIGHT   4095
> >
> > +#define ICnDMR_YCMODE_UYVY           (1 << 4)
> > +
> >  enum rzg2l_csi2_pads {
> >       RZG2L_CRU_IP_SINK = 0,
> >       RZG2L_CRU_IP_SOURCE,
> > @@ -68,12 +70,14 @@ struct rzg2l_cru_ip {
> >   * @format: 4CC format identifier (V4L2_PIX_FMT_*)
> >   * @datatype: MIPI CSI2 data type
> >   * @bpp: bytes per pixel
> > + * @icndmr: ICnDMR register value
> >   */
> >  struct rzg2l_cru_ip_format {
> >       u32 code;
> >       u32 format;
> >       u32 datatype;
> >       u8 bpp;
> > +     u32 icndmr;
> >  };
> >
> >  /**
> > diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
> > index 6ce077ab42e2..f14ac949cc64 100644
> > --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
> > +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
> > @@ -17,6 +17,7 @@ static const struct rzg2l_cru_ip_format rzg2l_cru_ip_formats[] = {
> >               .format = V4L2_PIX_FMT_UYVY,
> >               .datatype = MIPI_CSI2_DT_YUV422_8B,
> >               .bpp = 2,
> > +             .icndmr = ICnDMR_YCMODE_UYVY,
> >       },
> >  };
> >
> > diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> > index c6c82b9b130a..c3d10b001b7c 100644
> > --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> > +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> > @@ -88,7 +88,6 @@
> >
> >  /* CRU Data Output Mode Register */
> >  #define ICnDMR                               0x26c
> > -#define ICnDMR_YCMODE_UYVY           (1 << 4)
> >
> >  #define RZG2L_TIMEOUT_MS             100
> >  #define RZG2L_RETRIES                        10
> > @@ -278,6 +277,7 @@ static int rzg2l_cru_initialize_image_conv(struct rzg2l_cru_dev *cru,
> >                                          u8 csi_vc)
> >  {
> >       const struct v4l2_format_info *src_finfo, *dst_finfo;
> > +     const struct rzg2l_cru_ip_format *cru_video_fmt;
> >       const struct rzg2l_cru_ip_format *cru_ip_fmt;
> >       u32 icndmr;
> >
> > @@ -288,15 +288,13 @@ static int rzg2l_cru_initialize_image_conv(struct rzg2l_cru_dev *cru,
> >       dst_finfo = v4l2_format_info(cru->format.pixelformat);
> >
> >       /* Output format */
> > -     switch (cru->format.pixelformat) {
> > -     case V4L2_PIX_FMT_UYVY:
> > -             icndmr = ICnDMR_YCMODE_UYVY;
> > -             break;
> > -     default:
> > +     cru_video_fmt = rzg2l_cru_ip_format_to_fmt(cru->format.pixelformat);
> > +     if (!cru_video_fmt) {
> >               dev_err(cru->dev, "Invalid pixelformat (0x%x)\n",
> >                       cru->format.pixelformat);
> >               return -EINVAL;
> >       }
> > +     icndmr = cru_video_fmt->icndmr;
>
> I think you can drop the icndmr local variable and write below
>
>         /* Set output data format */
>         rzg2l_cru_write(cru, ICnDMR, cru_video_fmt->icndmr);
>
OK, I'll get rid of the local var.

Cheers,
Prabhakar

> With this,
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
>
> >
> >       /* If input and output use same colorspace, do bypass mode */
> >       if (v4l2_is_format_yuv(src_finfo) && v4l2_is_format_yuv(dst_finfo))
>
> --
> Regards,
>
> Laurent Pinchart