On Mon, 2019-09-16 at 12:04 +0200, Hans Verkuil wrote:
> Use these new standard macros to log the fourcc value in a
> human readable format.
> 
> Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
> Acked-by: Sakari Ailus <sakari.ai...@linux.intel.com>
> ---
>  drivers/media/v4l2-core/v4l2-ioctl.c | 58 +++++++++-------------------
>  1 file changed, 18 insertions(+), 40 deletions(-)
> 
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c 
> b/drivers/media/v4l2-core/v4l2-ioctl.c
> index 51b912743f0f..8a302691447e 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -264,12 +264,9 @@ static void v4l_print_fmtdesc(const void *arg, bool 
> write_only)
>  {
>       const struct v4l2_fmtdesc *p = arg;
>  
> -     pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, 
> description='%.*s'\n",
> +     pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=" v4l2_fourcc_conv 
> ", description='%.*s'\n",
>               p->index, prt_names(p->type, v4l2_type_names),
> -             p->flags, (p->pixelformat & 0xff),
> -             (p->pixelformat >>  8) & 0xff,
> -             (p->pixelformat >> 16) & 0xff,
> -             (p->pixelformat >> 24) & 0xff,
> +             p->flags, v4l2_fourcc_args(p->pixelformat),
>               (int)sizeof(p->description), p->description);
>  }
>  
> @@ -291,12 +288,9 @@ static void v4l_print_format(const void *arg, bool 
> write_only)
>       case V4L2_BUF_TYPE_VIDEO_CAPTURE:
>       case V4L2_BUF_TYPE_VIDEO_OUTPUT:
>               pix = &p->fmt.pix;
> -             pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, 
> bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x,
> ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
> +             pr_cont(", width=%u, height=%u, pixelformat=" v4l2_fourcc_conv 
> ", field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x,
> ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
>                       pix->width, pix->height,
> -                     (pix->pixelformat & 0xff),
> -                     (pix->pixelformat >>  8) & 0xff,
> -                     (pix->pixelformat >> 16) & 0xff,
> -                     (pix->pixelformat >> 24) & 0xff,
> +                     v4l2_fourcc_args(pix->pixelformat),
>                       prt_names(pix->field, v4l2_field_names),
>                       pix->bytesperline, pix->sizeimage,
>                       pix->colorspace, pix->flags, pix->ycbcr_enc,
> @@ -305,12 +299,9 @@ static void v4l_print_format(const void *arg, bool 
> write_only)
>       case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
>       case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
>               mp = &p->fmt.pix_mp;
> -             pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, 
> colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u,
> xfer_func=%u\n",
> +             pr_cont(", width=%u, height=%u, format=" v4l2_fourcc_conv ", 
> field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u,
> quantization=%u, xfer_func=%u\n",
>                       mp->width, mp->height,
> -                     (mp->pixelformat & 0xff),
> -                     (mp->pixelformat >>  8) & 0xff,
> -                     (mp->pixelformat >> 16) & 0xff,
> -                     (mp->pixelformat >> 24) & 0xff,
> +                     v4l2_fourcc_args(mp->pixelformat),
>                       prt_names(mp->field, v4l2_field_names),
>                       mp->colorspace, mp->num_planes, mp->flags,
>                       mp->ycbcr_enc, mp->quantization, mp->xfer_func);
> @@ -358,20 +349,14 @@ static void v4l_print_format(const void *arg, bool 
> write_only)
>       case V4L2_BUF_TYPE_SDR_CAPTURE:
>       case V4L2_BUF_TYPE_SDR_OUTPUT:
>               sdr = &p->fmt.sdr;
> -             pr_cont(", pixelformat=%c%c%c%c\n",
> -                     (sdr->pixelformat >>  0) & 0xff,
> -                     (sdr->pixelformat >>  8) & 0xff,
> -                     (sdr->pixelformat >> 16) & 0xff,
> -                     (sdr->pixelformat >> 24) & 0xff);
> +             pr_cont(", pixelformat=" v4l2_fourcc_conv "\n",
> +                     v4l2_fourcc_args(sdr->pixelformat));
>               break;
>       case V4L2_BUF_TYPE_META_CAPTURE:
>       case V4L2_BUF_TYPE_META_OUTPUT:
>               meta = &p->fmt.meta;
> -             pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
> -                     (meta->dataformat >>  0) & 0xff,
> -                     (meta->dataformat >>  8) & 0xff,
> -                     (meta->dataformat >> 16) & 0xff,
> -                     (meta->dataformat >> 24) & 0xff,
> +             pr_cont(", dataformat=" v4l2_fourcc_conv ", buffersize=%u\n",
> +                     v4l2_fourcc_args(meta->dataformat),
>                       meta->buffersize);
>               break;
>       }
> @@ -381,15 +366,12 @@ static void v4l_print_framebuffer(const void *arg, bool 
> write_only)
>  {
>       const struct v4l2_framebuffer *p = arg;
>  
> -     pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, 
> pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
> -                     p->capability, p->flags, p->base,
> -                     p->fmt.width, p->fmt.height,
> -                     (p->fmt.pixelformat & 0xff),
> -                     (p->fmt.pixelformat >>  8) & 0xff,
> -                     (p->fmt.pixelformat >> 16) & 0xff,
> -                     (p->fmt.pixelformat >> 24) & 0xff,
> -                     p->fmt.bytesperline, p->fmt.sizeimage,
> -                     p->fmt.colorspace);
> +     pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, 
> pixelformat=" v4l2_fourcc_conv ", bytesperline=%u, sizeimage=%u,
> colorspace=%d\n",
> +             p->capability, p->flags, p->base,
> +             p->fmt.width, p->fmt.height,
> +             v4l2_fourcc_args(p->fmt.pixelformat),
> +             p->fmt.bytesperline, p->fmt.sizeimage,
> +             p->fmt.colorspace);
>  }
>  
>  static void v4l_print_buftype(const void *arg, bool write_only)
> @@ -1383,12 +1365,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
>                               return;
>                       WARN(1, "Unknown pixelformat 0x%08x\n", 
> fmt->pixelformat);
>                       flags = 0;
> -                     snprintf(fmt->description, sz, "%c%c%c%c%s",
> -                                     (char)(fmt->pixelformat & 0x7f),
> -                                     (char)((fmt->pixelformat >> 8) & 0x7f),
> -                                     (char)((fmt->pixelformat >> 16) & 0x7f),
> -                                     (char)((fmt->pixelformat >> 24) & 0x7f),
> -                                     (fmt->pixelformat & (1UL << 31)) ? 
> "-BE" : "");
> +                     snprintf(fmt->description, sz, v4l2_fourcc_conv,
> +                              v4l2_fourcc_args(fmt->pixelformat));
>                       break;
>               }
>       }

Nice cleanup!

I think these are the only media drivers that would have to be converted,
in case anyone wants to tackle this.

drivers/media/common/saa7146/saa7146_video.c:         vv->ov_fmt->pixelformat, 
v4l2_field_names[vv->ov.win.field]);
drivers/media/platform/atmel/atmel-isc-base.c:                   (char 
*)&pixfmt->pixelformat, (char *)&sd_fmt->fourcc);
drivers/media/platform/sti/delta/delta-debug.c:          (char 
*)&f->pixelformat, f->width, f->height,
drivers/media/platform/vsp1/vsp1_drm.c:         cfg->pixelformat, cfg->pitch, 
&cfg->mem[0], &cfg->mem[1],

Reviewed-by: Ezequiel Garcia <ezequ...@collabora.com>

Thanks,
Ezequiel

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