linux-kernel - Re: [PATCH v6 1/3] media: ti: cal: Use printk's fourcc formatting

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Message-ID: <174280894255.3289779.11656220268332464691@ping.linuxembedded.co.uk>
Date: Mon, 24 Mar 2025 09:35:42 +0000
From: Kieran Bingham <kieran.bingham@...asonboard.com>
To: Jacopo Mondi <jacopo.mondi@...asonboard.com>, Laurent Pinchart <laurent.pinchart@...asonboard.com>, Mauro Carvalho Chehab <mchehab@...nel.org>, Sakari Ailus <sakari.ailus@...ux.intel.com>, Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, linux-media@...r.kernel.org
Cc: Jai Luthra <jai.luthra@...asonboard.com>, linux-kernel@...r.kernel.org, Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: Re: [PATCH v6 1/3] media: ti: cal: Use printk's fourcc formatting

Quoting Tomi Valkeinen (2025-03-24 09:29:17)
> Use printk's fourcc formatting instead of a custom one.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>


Reviewed-by: Kieran Bingham <kieran.bingham@...asonboard.com>

> ---
>  drivers/media/platform/ti/cal/cal-video.c | 26 ++++++--------------------
>  1 file changed, 6 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/media/platform/ti/cal/cal-video.c b/drivers/media/platform/ti/cal/cal-video.c
> index e29743ae61e2..4eb77f46f030 100644
> --- a/drivers/media/platform/ti/cal/cal-video.c
> +++ b/drivers/media/platform/ti/cal/cal-video.c
> @@ -25,20 +25,6 @@
>  
>  #include "cal.h"
>  
> -/*  Print Four-character-code (FOURCC) */
> -static char *fourcc_to_str(u32 fmt)
> -{
> -       static char code[5];
> -
> -       code[0] = (unsigned char)(fmt & 0xff);
> -       code[1] = (unsigned char)((fmt >> 8) & 0xff);
> -       code[2] = (unsigned char)((fmt >> 16) & 0xff);
> -       code[3] = (unsigned char)((fmt >> 24) & 0xff);
> -       code[4] = '\0';
> -
> -       return code;
> -}
> -
>  /* ------------------------------------------------------------------
>   *     V4L2 Common IOCTLs
>   * ------------------------------------------------------------------
> @@ -180,8 +166,8 @@ static void cal_calc_format_size(struct cal_ctx *ctx,
>         f->fmt.pix.sizeimage = f->fmt.pix.height *
>                                f->fmt.pix.bytesperline;
>  
> -       ctx_dbg(3, ctx, "%s: fourcc: %s size: %dx%d bpl:%d img_size:%d\n",
> -               __func__, fourcc_to_str(f->fmt.pix.pixelformat),
> +       ctx_dbg(3, ctx, "%s: fourcc: %p4cc size: %dx%d bpl:%d img_size:%d\n",
> +               __func__, &f->fmt.pix.pixelformat,
>                 f->fmt.pix.width, f->fmt.pix.height,
>                 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
>  }
> @@ -509,8 +495,8 @@ static void cal_mc_try_fmt(struct cal_ctx *ctx, struct v4l2_format *f,
>         if (info)
>                 *info = fmtinfo;
>  
> -       ctx_dbg(3, ctx, "%s: %s %ux%u (bytesperline %u sizeimage %u)\n",
> -               __func__, fourcc_to_str(format->pixelformat),
> +       ctx_dbg(3, ctx, "%s: %p4cc %ux%u (bytesperline %u sizeimage %u)\n",
> +               __func__, &format->pixelformat,
>                 format->width, format->height,
>                 format->bytesperline, format->sizeimage);
>  }
> @@ -866,8 +852,8 @@ static int cal_ctx_v4l2_init_formats(struct cal_ctx *ctx)
>                         if (mbus_code.code == fmtinfo->code) {
>                                 ctx->active_fmt[i] = fmtinfo;
>                                 ctx_dbg(2, ctx,
> -                                       "matched fourcc: %s: code: %04x idx: %u\n",
> -                                       fourcc_to_str(fmtinfo->fourcc),
> +                                       "matched fourcc: %p4cc: code: %04x idx: %u\n",
> +                                       &fmtinfo->fourcc,
>                                         fmtinfo->code, i);
>                                 ctx->num_active_fmt = ++i;
>                         }
> 
> -- 
> 2.43.0
>