linux-kernel - Re: [PATCH v3 3/4] media: i2c: ov5675: parse and register V4L2 device tree properties

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Message-ID: <20220510094751.b6xbevurqhezpsnd@uno.localdomain>
Date:   Tue, 10 May 2022 11:47:51 +0200
From:   Jacopo Mondi <jacopo@...ndi.org>
To:     Quentin Schulz <foss+kernel@...il.net>
Cc:     shawnx.tu@...el.com, mchehab@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Quentin Schulz <quentin.schulz@...obroma-systems.com>
Subject: Re: [PATCH v3 3/4] media: i2c: ov5675: parse and register V4L2
 device tree properties

Hi Quentin,

On Mon, May 09, 2022 at 04:32:25PM +0200, Quentin Schulz wrote:
> From: Quentin Schulz <quentin.schulz@...obroma-systems.com>
>
> Parse V4L2 device tree properties and register controls for them.
>
> Signed-off-by: Quentin Schulz <quentin.schulz@...obroma-systems.com>
> ---
>  drivers/media/i2c/ov5675.c | 18 +++++++++++++++++-
>  1 file changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/ov5675.c b/drivers/media/i2c/ov5675.c
> index cee380196774..5544e1ae444e 100644
> --- a/drivers/media/i2c/ov5675.c
> +++ b/drivers/media/i2c/ov5675.c
> @@ -779,12 +779,14 @@ static const struct v4l2_ctrl_ops ov5675_ctrl_ops = {
>
>  static int ov5675_init_controls(struct ov5675 *ov5675)
>  {
> +	struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
>  	struct v4l2_ctrl_handler *ctrl_hdlr;
> +	struct v4l2_fwnode_device_properties props;

You could move the line up and maintain the (in)famous
reverse-xmas-tree ordering in variable declaration.

Nit apart, looks good
Reviewed-by: Jacopo Mondi <jacopo@...ndi.org>

Thanks
  j

>  	s64 exposure_max, h_blank;
>  	int ret;
>
>  	ctrl_hdlr = &ov5675->ctrl_handler;
> -	ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
> +	ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
>  	if (ret)
>  		return ret;
>
> @@ -838,9 +840,23 @@ static int ov5675_init_controls(struct ov5675 *ov5675)
>  	if (ctrl_hdlr->error)
>  		return ctrl_hdlr->error;
>
> +	ret = v4l2_fwnode_device_parse(&client->dev, &props);
> +	if (ret)
> +		goto error;
> +
> +	ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov5675_ctrl_ops,
> +					      &props);
> +	if (ret)
> +		goto error;
> +
>  	ov5675->sd.ctrl_handler = ctrl_hdlr;
>
>  	return 0;
> +
> +error:
> +	v4l2_ctrl_handler_free(ctrl_hdlr);
> +
> +	return ret;
>  }
>
>  static void ov5675_update_pad_format(const struct ov5675_mode *mode,
> --
> 2.35.3
>