[2/5] media: i2c: imx219: Switch from open to init_cfg

From: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>

Use the init_cfg pad level operation instead of the internal subdev
open operation to set default formats on the pads.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
---
 drivers/media/i2c/imx219.c | 58 +++++++++++++++++---------------------
 1 file changed, 26 insertions(+), 32 deletions(-)

Hi Jacopo,

Thank you for the patch.

On Tue, Jul 04, 2023 at 12:40:54PM +0200, Jacopo Mondi wrote:
> From: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
> 
> Use the init_cfg pad level operation instead of the internal subdev
> open operation to set default formats on the pads.
> 
> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
> Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
> ---
>  drivers/media/i2c/imx219.c | 58 +++++++++++++++++---------------------
>  1 file changed, 26 insertions(+), 32 deletions(-)
> 
> diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
> index 998a673a4290..191cb4a427cc 100644
> --- a/drivers/media/i2c/imx219.c
> +++ b/drivers/media/i2c/imx219.c
> @@ -608,34 +608,6 @@ static void imx219_set_default_format(struct imx219 *imx219)
>  	fmt->field = V4L2_FIELD_NONE;
>  }
>  
> -static int imx219_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
> -{
> -	struct imx219 *imx219 = to_imx219(sd);
> -	struct v4l2_mbus_framefmt *try_fmt =
> -		v4l2_subdev_get_try_format(sd, fh->state, 0);
> -	struct v4l2_rect *try_crop;
> -
> -	mutex_lock(&imx219->mutex);
> -
> -	/* Initialize try_fmt */
> -	try_fmt->width = supported_modes[0].width;
> -	try_fmt->height = supported_modes[0].height;
> -	try_fmt->code = imx219_get_format_code(imx219,
> -					       MEDIA_BUS_FMT_SRGGB10_1X10);
> -	try_fmt->field = V4L2_FIELD_NONE;
> -
> -	/* Initialize try_crop rectangle. */
> -	try_crop = v4l2_subdev_get_try_crop(sd, fh->state, 0);
> -	try_crop->top = IMX219_PIXEL_ARRAY_TOP;
> -	try_crop->left = IMX219_PIXEL_ARRAY_LEFT;
> -	try_crop->width = IMX219_PIXEL_ARRAY_WIDTH;
> -	try_crop->height = IMX219_PIXEL_ARRAY_HEIGHT;
> -
> -	mutex_unlock(&imx219->mutex);
> -
> -	return 0;
> -}
> -
>  static int imx219_set_ctrl(struct v4l2_ctrl *ctrl)
>  {
>  	struct imx219 *imx219 =
> @@ -725,6 +697,31 @@ static const struct v4l2_ctrl_ops imx219_ctrl_ops = {
>  	.s_ctrl = imx219_set_ctrl,
>  };
>  
> +static int imx219_init_cfg(struct v4l2_subdev *sd,
> +			   struct v4l2_subdev_state *state)
> +{
> +	struct imx219 *imx219 = to_imx219(sd);
> +	struct v4l2_mbus_framefmt *format;
> +	struct v4l2_rect *try_crop;
> +
> +	/* Initialize try_fmt */
> +	format = v4l2_subdev_get_try_format(sd, state, 0);

This should be v4l2_subdev_get_pad_format(). The two functions are
identical, but v4l2_subdev_get_try_format() implies it access formats in
the try state only, while .init_cfg() will be used for the active state
too later in this series. The comment should also be updated, or just
dropped.

> +	format->width = supported_modes[0].width;
> +	format->height = supported_modes[0].height;
> +	format->code = imx219_get_format_code(imx219,
> +					      MEDIA_BUS_FMT_SRGGB10_1X10);
> +	format->field = V4L2_FIELD_NONE;
> +
> +	/* Initialize try_crop rectangle. */
> +	try_crop = v4l2_subdev_get_try_crop(sd, state, 0);

Same here, an the variable should be renamed to crop.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> +	try_crop->top = IMX219_PIXEL_ARRAY_TOP;
> +	try_crop->left = IMX219_PIXEL_ARRAY_LEFT;
> +	try_crop->width = IMX219_PIXEL_ARRAY_WIDTH;
> +	try_crop->height = IMX219_PIXEL_ARRAY_HEIGHT;
> +
> +	return 0;
> +}
> +
>  static int imx219_enum_mbus_code(struct v4l2_subdev *sd,
>  				 struct v4l2_subdev_state *sd_state,
>  				 struct v4l2_subdev_mbus_code_enum *code)
> @@ -1235,6 +1232,7 @@ static const struct v4l2_subdev_video_ops imx219_video_ops = {
>  };
>  
>  static const struct v4l2_subdev_pad_ops imx219_pad_ops = {
> +	.init_cfg = imx219_init_cfg,
>  	.enum_mbus_code = imx219_enum_mbus_code,
>  	.get_fmt = imx219_get_pad_format,
>  	.set_fmt = imx219_set_pad_format,
> @@ -1248,9 +1246,6 @@ static const struct v4l2_subdev_ops imx219_subdev_ops = {
>  	.pad = &imx219_pad_ops,
>  };
>  
> -static const struct v4l2_subdev_internal_ops imx219_internal_ops = {
> -	.open = imx219_open,
> -};
>  
>  static unsigned long imx219_get_pixel_rate(struct imx219 *imx219)
>  {
> @@ -1509,7 +1504,6 @@ static int imx219_probe(struct i2c_client *client)
>  		goto error_power_off;
>  
>  	/* Initialize subdev */
> -	imx219->sd.internal_ops = &imx219_internal_ops;
>  	imx219->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
>  			    V4L2_SUBDEV_FL_HAS_EVENTS;
>  	imx219->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;