[4/5] media: i2c: imx219: Simplify format assignment

The set_fmt and init_cfg functions both fills a v4l2_mbus_framefmt
instance, passing in the mode and the media bus code. While set_fmt
uses function helpers, init_cfg open-codes the assignments.

Simplify the format initialization by moving it to a common helper.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
---
 drivers/media/i2c/imx219.c | 56 ++++++++++++++------------------------
 1 file changed, 21 insertions(+), 35 deletions(-)

Hi Jacopo,

Thank you for the patch.

On Tue, Jul 04, 2023 at 12:40:56PM +0200, Jacopo Mondi wrote:
> The set_fmt and init_cfg functions both fills a v4l2_mbus_framefmt
> instance, passing in the mode and the media bus code. While set_fmt
> uses function helpers, init_cfg open-codes the assignments.
> 
> Simplify the format initialization by moving it to a common helper.
> 
> Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
> ---
>  drivers/media/i2c/imx219.c | 56 ++++++++++++++------------------------
>  1 file changed, 21 insertions(+), 35 deletions(-)
> 
> diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
> index 127ecee3643d..c1246bd23b0d 100644
> --- a/drivers/media/i2c/imx219.c
> +++ b/drivers/media/i2c/imx219.c
> @@ -670,6 +670,23 @@ static const struct v4l2_ctrl_ops imx219_ctrl_ops = {
>  	.s_ctrl = imx219_set_ctrl,
>  };
>  
> +static void imx219_update_pad_format(struct imx219 *imx219,
> +				     const struct imx219_mode *mode,
> +				     struct v4l2_mbus_framefmt *fmt, u32 code)
> +{
> +	/* Bayer order varies with flips */
> +	fmt->code = imx219_get_format_code(imx219, code);
> +	fmt->width = mode->width;
> +	fmt->height = mode->height;
> +	fmt->field = V4L2_FIELD_NONE;
> +	fmt->colorspace = V4L2_COLORSPACE_SRGB;

Candidate for a separate fix: use V4L2_COLORSPACE_RAW.

> +	fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
> +	fmt->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
> +							  fmt->colorspace,
> +							  fmt->ycbcr_enc);

And this can then be V4L2_QUANTIZATION_FULL_RANGE.

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

> +	fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
> +}
> +
>  static int imx219_init_cfg(struct v4l2_subdev *sd,
>  			   struct v4l2_subdev_state *state)
>  {
> @@ -679,17 +696,8 @@ static int imx219_init_cfg(struct v4l2_subdev *sd,
>  
>  	/* Initialize try_fmt */
>  	format = v4l2_subdev_get_pad_format(sd, state, 0);
> -	format->width = supported_modes[0].width;
> -	format->height = supported_modes[0].height;
> -	format->code = imx219_get_format_code(imx219,
> -					      MEDIA_BUS_FMT_SRGGB10_1X10);
> -	format->field = V4L2_FIELD_NONE;
> -	format->colorspace = V4L2_COLORSPACE_SRGB;
> -	format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(format->colorspace);
> -	format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
> -							  format->colorspace,
> -							  format->ycbcr_enc);
> -	format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(format->colorspace);
> +	imx219_update_pad_format(imx219, &supported_modes[0], format,
> +				 MEDIA_BUS_FMT_SRGGB10_1X10);
>  
>  	/* Initialize try_crop rectangle. */
>  	try_crop = v4l2_subdev_get_pad_crop(sd, state, 0);
> @@ -737,26 +745,6 @@ static int imx219_enum_frame_size(struct v4l2_subdev *sd,
>  	return 0;
>  }
>  
> -static void imx219_reset_colorspace(struct v4l2_mbus_framefmt *fmt)
> -{
> -	fmt->colorspace = V4L2_COLORSPACE_SRGB;
> -	fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
> -	fmt->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
> -							  fmt->colorspace,
> -							  fmt->ycbcr_enc);
> -	fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
> -}
> -
> -static void imx219_update_pad_format(struct imx219 *imx219,
> -				     const struct imx219_mode *mode,
> -				     struct v4l2_subdev_format *fmt)
> -{
> -	fmt->format.width = mode->width;
> -	fmt->format.height = mode->height;
> -	fmt->format.field = V4L2_FIELD_NONE;
> -	imx219_reset_colorspace(&fmt->format);
> -}
> -
>  static int imx219_set_pad_format(struct v4l2_subdev *sd,
>  				 struct v4l2_subdev_state *sd_state,
>  				 struct v4l2_subdev_format *fmt)
> @@ -772,15 +760,13 @@ static int imx219_set_pad_format(struct v4l2_subdev *sd,
>  	if (i >= ARRAY_SIZE(imx219_mbus_formats))
>  		i = 0;
>  
> -	/* Bayer order varies with flips */
> -	fmt->format.code = imx219_get_format_code(imx219, imx219_mbus_formats[i]);
> -
>  	mode = v4l2_find_nearest_size(supported_modes,
>  				      ARRAY_SIZE(supported_modes),
>  				      width, height,
>  				      fmt->format.width, fmt->format.height);
>  
> -	imx219_update_pad_format(imx219, mode, fmt);
> +	imx219_update_pad_format(imx219, mode, &fmt->format,
> +				 imx219_mbus_formats[i]);
>  
>  	if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
>  		imx219->mode = mode;