Re: [PATCH v1 05/15] media: i2c: imx290: Pass format and mode to imx290_calc_pixel_rate()

[Alexander Stein <alexander.stein@ew.tq-group.com>]

Hello Laurent,

thanks for working on this.

Am Dienstag, 22. November 2022, 23:32:40 CET schrieb Laurent Pinchart:
> Avoid accessing the imx290 current_format and current_mode fields in
> imx290_calc_pixel_rate() to prepare for the removal of those fields.
> Among the two callers of the function, imx290_ctrl_update() has an
> explicit mode pointer already, and we can also give it a format pointer.
> Use those explicitly.
> 
> While at it, inline the imx290_get_link_freq() function in
> imx290_calc_pixel_rate() as it is only called there.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
>  drivers/media/i2c/imx290.c | 27 ++++++++++++---------------
>  1 file changed, 12 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
> index 2d198b167853..a676ce93f96e 100644
> --- a/drivers/media/i2c/imx290.c
> +++ b/drivers/media/i2c/imx290.c
> @@ -547,21 +547,15 @@ static int imx290_write_current_format(struct imx290
> *imx290) return 0;
>  }
> 
> -static s64 imx290_get_link_freq(struct imx290 *imx290)
> +static u64 imx290_calc_pixel_rate(struct imx290 *imx290,
> +				  const struct v4l2_mbus_framefmt 
*format,

You can remove format here. It's unused and gets removed in the next patch 
anyway.

Regards,
Alexander

> +				  const struct imx290_mode *mode)
>  {
> -	u8 index = imx290->current_mode->link_freq_index;
> -
> -	return *(imx290_link_freqs_ptr(imx290) + index);
> -}
> -
> -static u64 imx290_calc_pixel_rate(struct imx290 *imx290)
> -{
> -	s64 link_freq = imx290_get_link_freq(imx290);
> -	u8 nlanes = imx290->nlanes;
> +	s64 link_freq = imx290_link_freqs_ptr(imx290)[mode-
>link_freq_index];
>  	u64 pixel_rate;
> 
>  	/* pixel rate = link_freq * 2 * nr_of_lanes / bits_per_sample */
> -	pixel_rate = link_freq * 2 * nlanes;
> +	pixel_rate = link_freq * 2 * imx290->nlanes;
>  	do_div(pixel_rate, imx290->bpp);
>  	return pixel_rate;
>  }
> @@ -635,6 +629,7 @@ static const char * const imx290_test_pattern_menu[] = {
> };
> 
>  static void imx290_ctrl_update(struct imx290 *imx290,
> +			       const struct v4l2_mbus_framefmt *format,
>  			       const struct imx290_mode *mode)
>  {
>  	unsigned int hblank = mode->hmax - mode->width;
> @@ -642,7 +637,7 @@ static void imx290_ctrl_update(struct imx290 *imx290,
> 
>  	__v4l2_ctrl_s_ctrl(imx290->link_freq, mode->link_freq_index);
>  	__v4l2_ctrl_s_ctrl_int64(imx290->pixel_rate,
> -				 imx290_calc_pixel_rate(imx290));
> +				 imx290_calc_pixel_rate(imx290, 
format, mode));
> 
>  	__v4l2_ctrl_modify_range(imx290->hblank, hblank, hblank, 1, hblank);
>  	__v4l2_ctrl_modify_range(imx290->vblank, vblank, vblank, 1, vblank);
> @@ -652,6 +647,7 @@ static int imx290_ctrl_init(struct imx290 *imx290)
>  {
>  	struct v4l2_fwnode_device_properties props;
>  	unsigned int blank;
> +	u64 pixel_rate;
>  	int ret;
> 
>  	ret = v4l2_fwnode_device_parse(imx290->dev, &props);
> @@ -689,10 +685,11 @@ static int imx290_ctrl_init(struct imx290 *imx290)
>  	if (imx290->link_freq)
>  		imx290->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
> 
> +	pixel_rate = imx290_calc_pixel_rate(imx290, &imx290->current_format,
> +					    imx290->current_mode);
>  	imx290->pixel_rate = v4l2_ctrl_new_std(&imx290->ctrls, 
&imx290_ctrl_ops,
>  					       V4L2_CID_PIXEL_RATE,
> -					       1, INT_MAX, 1,
> -					       
imx290_calc_pixel_rate(imx290));
> +					       1, INT_MAX, 1, 
pixel_rate);
> 
>  	v4l2_ctrl_new_std_menu_items(&imx290->ctrls, &imx290_ctrl_ops,
>  				     V4L2_CID_TEST_PATTERN,
> @@ -913,7 +910,7 @@ static int imx290_set_fmt(struct v4l2_subdev *sd,
>  		imx290->current_mode = mode;
>  		imx290->bpp = imx290_formats[i].bpp;
> 
> -		imx290_ctrl_update(imx290, mode);
> +		imx290_ctrl_update(imx290, &fmt->format, mode);
>  	}
> 
>  	*format = fmt->format;