Re: [PATCH v5 13/22] media: rzg2l-cru: Simplify handling of supported formats

Laurent Pinchart
2024-10-15T10:23:14Z

Hi Prabhakar,

Thank you for the patch.

On Fri, Oct 11, 2024 at 06:30:43PM +0100, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Refactor the handling of supported formats in the RZ/G2L CRU driver by
> moving the `rzg2l_cru_ip_format` struct to the common header for reuse
> across multiple files and adding `pixelformat` and `bpp` members to it.

The structure is already in a common header. You can write

Refactor the handling of supported formats in the RZ/G2L CRU driver by
adding `pixelformat` and `bpp` members to the `rzg2l_cru_ip_format`
structure.

> This change centralizes format handling, making it easier to manage and
> extend.
>
> New helper functions, `rzg2l_cru_ip_format_to_fmt()` and
> `rzg2l_cru_ip_index_to_fmt()`, are added to retrieve format information
> based on 4CC format and index, respectively. These helpers allow the
> removal of the now redundant `rzg2l_cru_format_from_pixel()` function.
>
> The new helpers are used in `rzg2l_cru_format_bytesperline()`,
> `rzg2l_cru_format_align()`, and `rzg2l_cru_enum_fmt_vid_cap()`,
> streamlining the handling of supported formats and improving code
> maintainability.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

> ---
> .../platform/renesas/rzg2l-cru/rzg2l-cru.h | 6 ++++
> .../platform/renesas/rzg2l-cru/rzg2l-ip.c | 22 +++++++++++++
> .../platform/renesas/rzg2l-cru/rzg2l-video.c | 33 +++++--------------
> 3 files changed, 37 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h
> index 9b1ba015df3b..327516272e53 100644
> --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h
> +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h
> @@ -66,10 +66,14 @@ struct rzg2l_cru_ip {
> * struct rzg2l_cru_ip_format - CRU IP format
> * @code: Media bus code
> * @datatype: MIPI CSI2 data type
> + * @format: 4CC format identifier (V4L2_PIX_FMT_*)
> + * @bpp: bytes per pixel
> */
> struct rzg2l_cru_ip_format {
> u32 code;
> u32 datatype;
> + u32 format;
> + u8 bpp;
> };
>
> /**
> @@ -161,5 +165,7 @@ void rzg2l_cru_ip_subdev_unregister(struct rzg2l_cru_dev *cru);
> struct v4l2_mbus_framefmt *rzg2l_cru_ip_get_src_fmt(struct rzg2l_cru_dev *cru);
>
> const struct rzg2l_cru_ip_format *rzg2l_cru_ip_code_to_fmt(unsigned int code);
> +const struct rzg2l_cru_ip_format *rzg2l_cru_ip_format_to_fmt(u32 format);
> +const struct rzg2l_cru_ip_format *rzg2l_cru_ip_index_to_fmt(u32 index);
>
> #endif
> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
> index 8f9683bf31fa..a40b0184b955 100644
> --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
> +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-ip.c
> @@ -14,6 +14,8 @@ static const struct rzg2l_cru_ip_format rzg2l_cru_ip_formats[] = {
> {
> .code = MEDIA_BUS_FMT_UYVY8_1X16,
> .datatype = MIPI_CSI2_DT_YUV422_8B,
> + .format = V4L2_PIX_FMT_UYVY,
> + .bpp = 2,
> },
> };
>
> @@ -28,6 +30,26 @@ const struct rzg2l_cru_ip_format *rzg2l_cru_ip_code_to_fmt(unsigned int code)
> return NULL;
> }
>
> +const struct rzg2l_cru_ip_format *rzg2l_cru_ip_format_to_fmt(u32 format)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(rzg2l_cru_ip_formats); i++) {
> + if (rzg2l_cru_ip_formats[i].format == format)
> + return &rzg2l_cru_ip_formats[i];
> + }
> +
> + return NULL;
> +}
> +
> +const struct rzg2l_cru_ip_format *rzg2l_cru_ip_index_to_fmt(u32 index)
> +{
> + if (index >= ARRAY_SIZE(rzg2l_cru_ip_formats))
> + return NULL;
> +
> + return &rzg2l_cru_ip_formats[index];
> +}
> +
> struct v4l2_mbus_framefmt *rzg2l_cru_ip_get_src_fmt(struct rzg2l_cru_dev *cru)
> {
> struct v4l2_subdev_state *state;
> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> index 6a4f0455dc9c..a0fa4542ac43 100644
> --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> @@ -812,37 +812,19 @@ int rzg2l_cru_dma_register(struct rzg2l_cru_dev *cru)
> * V4L2 stuff
> */
>
> -static const struct v4l2_format_info rzg2l_cru_formats[] = {
> - {
> - .format = V4L2_PIX_FMT_UYVY,
> - .bpp[0] = 2,
> - },
> -};
> -
> -const struct v4l2_format_info *rzg2l_cru_format_from_pixel(u32 format)
> -{
> - unsigned int i;
> -
> - for (i = 0; i < ARRAY_SIZE(rzg2l_cru_formats); i++)
> - if (rzg2l_cru_formats[i].format == format)
> - return rzg2l_cru_formats + i;
> -
> - return NULL;
> -}
> -
> static u32 rzg2l_cru_format_bytesperline(struct v4l2_pix_format *pix)
> {
> - const struct v4l2_format_info *fmt;
> + const struct rzg2l_cru_ip_format *fmt;
>
> - fmt = rzg2l_cru_format_from_pixel(pix->pixelformat);
> + fmt = rzg2l_cru_ip_format_to_fmt(pix->pixelformat);
>
> - return pix->width * fmt->bpp[0];
> + return pix->width * fmt->bpp;
> }
>
> static void rzg2l_cru_format_align(struct rzg2l_cru_dev *cru,
> struct v4l2_pix_format *pix)
> {
> - if (!rzg2l_cru_format_from_pixel(pix->pixelformat))
> + if (!rzg2l_cru_ip_format_to_fmt(pix->pixelformat))
> pix->pixelformat = RZG2L_CRU_DEFAULT_FORMAT;
>
> switch (pix->field) {
> @@ -934,10 +916,13 @@ static int rzg2l_cru_g_fmt_vid_cap(struct file *file, void *priv,
> static int rzg2l_cru_enum_fmt_vid_cap(struct file *file, void *priv,
> struct v4l2_fmtdesc *f)
> {
> - if (f->index >= ARRAY_SIZE(rzg2l_cru_formats))
> + const struct rzg2l_cru_ip_format *fmt;
> +
> + fmt = rzg2l_cru_ip_index_to_fmt(f->index);
> + if (!fmt)
> return -EINVAL;
>
> - f->pixelformat = rzg2l_cru_formats[f->index].format;
> + f->pixelformat = fmt->format;
>
> return 0;
> }

--
Regards,

Laurent Pinchart