linux-kernel - Re: [PATCH 3/4] media: i2c: imx214: Read orientation and rotation from system firmware

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Date:   Tue, 24 Oct 2023 09:25:43 +0200
From:   Jacopo Mondi <jacopo.mondi@...asonboard.com>
To:     André Apitzsch <git@...tzsch.eu>
Cc:     Ricardo Ribalda <ribalda@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH 3/4] media: i2c: imx214: Read orientation and rotation
 from system firmware

Hi Andre'

On Mon, Oct 23, 2023 at 11:47:52PM +0200, André Apitzsch wrote:
> Obtain rotation and orientation information from system firmware and
> register the appropriate controls.
>
> Signed-off-by: André Apitzsch <git@...tzsch.eu>
> ---
>  drivers/media/i2c/imx214.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/drivers/media/i2c/imx214.c b/drivers/media/i2c/imx214.c
> index 554fc4733128..bef8dc36e2d0 100644
> --- a/drivers/media/i2c/imx214.c
> +++ b/drivers/media/i2c/imx214.c
> @@ -704,9 +704,14 @@ static int imx214_ctrls_init(struct imx214 *imx214)
>  		.width = 1120,
>  		.height = 1120,
>  	};
> +	struct v4l2_fwnode_device_properties props;
>  	struct v4l2_ctrl_handler *ctrl_hdlr;
>  	int ret;
>
> +	ret = v4l2_fwnode_device_parse(imx214->dev, &props);
> +	if (ret < 0)
> +		return ret;
> +
>  	ctrl_hdlr = &imx214->ctrls;
>  	ret = v4l2_ctrl_handler_init(&imx214->ctrls, 3);
>  	if (ret)
> @@ -746,6 +751,8 @@ static int imx214_ctrls_init(struct imx214 *imx214)
>  				V4L2_CID_UNIT_CELL_SIZE,
>  				v4l2_ctrl_ptr_create((void *)&unit_size));
>
> +	v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx214_ctrl_ops, &props);
> +

I think it's fine not checking the return value of
v4l2_ctrl_new_fwnode_properties() if you inspect ctrl_hdlr->error just
after

Reviewed-by: Jacopo Mondi <jacopo.mondi@...asonboard.com>

Thanks
  j

>  	ret = ctrl_hdlr->error;
>  	if (ret) {
>  		v4l2_ctrl_handler_free(ctrl_hdlr);
>
> --
> 2.42.0
>