linux-kernel - Re: [PATCH 1/2] media: i2c: imx214: Use v4l2_subdev_get

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Date:   Wed, 30 Aug 2023 10:19:29 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Umang Jain <umang.jain@...asonboard.com>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Michael Riesch <michael.riesch@...fvision.net>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Ricardo Ribalda <ribalda@...nel.org>,
        Kieran Bingham <kieran.bingham@...asonboard.com>
Subject: Re: [PATCH 1/2] media: i2c: imx214: Use v4l2_subdev_get_fmt()

On Wed, Aug 30, 2023 at 10:23:22AM +0530, Umang Jain wrote:
> The imx214 driver uses the subdev active state, there's no

Does it ? I don't see a call to v4l2_subdev_init_finalize(), and the
imx214 struct has fmt and crop fields in which it stores the active
format.

> need to implement the .get_fmt() operation manually. Use the
> v4l2_subdev_get_fmt() helper instead.
> 
> Signed-off-by: Umang Jain <umang.jain@...asonboard.com>
> ---
>  drivers/media/i2c/imx214.c | 17 +----------------
>  1 file changed, 1 insertion(+), 16 deletions(-)
> 
> diff --git a/drivers/media/i2c/imx214.c b/drivers/media/i2c/imx214.c
> index 2f9c8582f940..d8bdc52f552a 100644
> --- a/drivers/media/i2c/imx214.c
> +++ b/drivers/media/i2c/imx214.c
> @@ -548,21 +548,6 @@ __imx214_get_pad_format(struct imx214 *imx214,
>  	}
>  }
>  
> -static int imx214_get_format(struct v4l2_subdev *sd,
> -			     struct v4l2_subdev_state *sd_state,
> -			     struct v4l2_subdev_format *format)
> -{
> -	struct imx214 *imx214 = to_imx214(sd);
> -
> -	mutex_lock(&imx214->mutex);
> -	format->format = *__imx214_get_pad_format(imx214, sd_state,
> -						  format->pad,
> -						  format->which);
> -	mutex_unlock(&imx214->mutex);
> -
> -	return 0;
> -}
> -
>  static struct v4l2_rect *
>  __imx214_get_pad_crop(struct imx214 *imx214,
>  		      struct v4l2_subdev_state *sd_state,
> @@ -842,7 +827,7 @@ static const struct v4l2_subdev_pad_ops imx214_subdev_pad_ops = {
>  	.enum_mbus_code = imx214_enum_mbus_code,
>  	.enum_frame_size = imx214_enum_frame_size,
>  	.enum_frame_interval = imx214_enum_frame_interval,
> -	.get_fmt = imx214_get_format,
> +	.get_fmt = v4l2_subdev_get_fmt,
>  	.set_fmt = imx214_set_format,
>  	.get_selection = imx214_get_selection,
>  	.init_cfg = imx214_entity_init_cfg,

-- 
Regards,

Laurent Pinchart