Re: [PATCH v4 24/25] media:i2c: imx258: Use v4l2_link_freq_to_bitmap helper

[Tommaso Merciai]

Hi Luis,

On Sun, Apr 14, 2024 at 02:35:02PM -0600, git@xxxxxxxxxxxx wrote:
> From: Luis Garcia <git@xxxxxxxxxxxx>
> 
> Use the v4l2_link_freq_to_bitmap() helper to figure out which
> driver-supported link freq can be used on a given system.
> 
> Signed-off-by: Luis Garcia <git@xxxxxxxxxxxx>
> Reviewed-by: Pavel Machek <pavel@xxxxxx>
> ---
>  drivers/media/i2c/imx258.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
> index 5de71cb7c1ae..65846dff775e 100644
> --- a/drivers/media/i2c/imx258.c
> +++ b/drivers/media/i2c/imx258.c
> @@ -693,6 +693,7 @@ struct imx258 {
>  	/* Current mode */
>  	const struct imx258_mode *cur_mode;
>  
> +	unsigned long link_freq_bitmap;
>  	const struct imx258_link_freq_config *link_freq_configs;
>  	const s64 *link_freq_menu_items;
>  	unsigned int lane_mode_idx;
> @@ -1552,6 +1553,17 @@ static int imx258_probe(struct i2c_client *client)
>  		return ret;
>  	}
>  
> +	ret = v4l2_link_freq_to_bitmap(&client->dev,
> +				       ep.link_frequencies,
> +				       ep.nr_of_link_frequencies,
> +				       imx258->link_freq_menu_items,
> +				       ARRAY_SIZE(link_freq_menu_items_19_2),
> +				       &imx258->link_freq_bitmap);
> +	if (ret) {
> +		dev_err(&client->dev, "Link frequency not supported\n");
> +		goto error_endpoint_free;
> +	}
> +
>  	/* Get number of data lanes */
>  	switch (ep.bus.mipi_csi2.num_data_lanes) {
>  	case 2:

Looks good to me.

ps:
Maybe a good plan for the future would be to use: dev_err_probe
(instead of dev_err into probe function)

But this I think is somenthing for next improvements. :)

Thanks & Regards,
Tommaso

> -- 
> 2.44.0
> 
>