Re: [PATCH v3 22/29] media: rkisp1: Use v4l2_subdev_get_frame_desc()

On Mon, Aug 24, 2026 at 03:14:44PM +0300, Sakari Ailus wrote:
> Call v4l2_subdev_get_frame_desc() to obtain the frame descriptor. This is
> preferred over calling the get_frame_desc() pad operation directly.
>
> Signed-off-by: Sakari Ailus <[email protected]>
> ---

Reviewed-by: Frank Li <[email protected]>

>  .../platform/rockchip/rkisp1/rkisp1-isp.c     | 21 ++++++++++---------
>  1 file changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
> index 2311672cedb1..eb8e881759f7 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
> @@ -8,6 +8,7 @@
>   * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
>   */
>
> +#include <linux/cleanup.h>
>  #include <linux/iopoll.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/regmap.h>
> @@ -87,11 +88,9 @@ static int rkisp1_gasket_enable(struct rkisp1_device *rkisp1,
>  				struct media_pad *source)
>  {
>  	struct v4l2_subdev *source_sd;
> -	struct v4l2_mbus_frame_desc fd;
>  	unsigned int dt;
>  	u32 mask;
>  	u32 val;
> -	int ret;
>
>  	/*
>  	 * Configure and enable the gasket with the CSI-2 data type. Set the
> @@ -101,22 +100,24 @@ static int rkisp1_gasket_enable(struct rkisp1_device *rkisp1,
>  	 */
>
>  	source_sd = media_entity_to_v4l2_subdev(source->entity);
> -	ret = v4l2_subdev_call(source_sd, pad, get_frame_desc,
> -			       source->index, &fd);
> -	if (ret) {
> +
> +	struct v4l2_mbus_frame_desc *fd __free(v4l2_subdev_free_frame_desc) =
> +		v4l2_subdev_get_frame_desc(source_sd, source->index,
> +					   V4L2_MBUS_FRAME_DESC_TYPE_CSI2);
> +	if (IS_ERR(fd)) {
>  		dev_err(rkisp1->dev,
> -			"failed to get frame descriptor from '%s':%u: %d\n",
> -			source_sd->name, 0, ret);
> -		return ret;
> +			"failed to get frame descriptor from '%s':%u: %pe\n",
> +			source_sd->name, 0, fd);
> +		return PTR_ERR(fd);
>  	}
>
> -	if (fd.num_entries != 1) {
> +	if (fd->num_entries != 1) {
>  		dev_err(rkisp1->dev, "invalid frame descriptor for '%s':%u\n",
>  			source_sd->name, 0);
>  		return -EINVAL;
>  	}
>
> -	dt = fd.entry[0].bus.csi2.dt;
> +	dt = fd->entry[0].bus.csi2.dt;
>
>  	if (rkisp1->gasket_id == 0) {
>  		mask = ISP_DEWARP_CONTROL_MIPI_CSI1_HS_POLARITY
> --
> 2.47.3
>