Re: [PATCH v2 3/3] media: imx-mipi-csis: Get number of active lanes via mbus_config

[Frank Li <Frank.li@nxp.com>]

On Wed, Sep 03, 2025 at 11:22:42AM +0100, Isaac Scott wrote:
> The number of lanes actively used by a MIPI CSI transmitter may differ
> from that which is defined in device tree. As such, call on
> v4l2_get_active_data_lanes to check if the driver reports a

function need (), v4l2_get_active_data_lanes()

> differing number of lanes to device tree, and use that number of active
> lanes.
>
> If the number of active data lanes is invalid, or the op is not
> supported, it will use the number of lanes defined in device tree.

remove "it will" to keep simple.

Frank
>
> Signed-off-by: Isaac Scott <isaac.scott@ideasonboard.com>
> ---
>  drivers/media/platform/nxp/imx-mipi-csis.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/media/platform/nxp/imx-mipi-csis.c b/drivers/media/platform/nxp/imx-mipi-csis.c
> index fc89325f2f94..985be511bcd0 100644
> --- a/drivers/media/platform/nxp/imx-mipi-csis.c
> +++ b/drivers/media/platform/nxp/imx-mipi-csis.c
> @@ -967,6 +967,9 @@ static int mipi_csis_s_stream(struct v4l2_subdev *sd, int enable)
>  	format = v4l2_subdev_state_get_format(state, CSIS_PAD_SINK);
>  	csis_fmt = find_csis_format(format->code);
>
> +	csis->bus.num_data_lanes = v4l2_get_active_data_lanes(csis->source.pad,
> +							      csis->max_data_lanes);
> +
>  	ret = mipi_csis_calculate_params(csis, csis_fmt);
>  	if (ret < 0)
>  		goto err_unlock;
> --
> 2.43.0
>