linux-kernel - Re: [PATCH] media: i2c: vgxy61: Report stream using frame descriptors

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Message-ID: <19cd3fd4-2d17-49f7-aa3a-9d443b24cf28@foss.st.com>
Date: Mon, 21 Jul 2025 13:03:50 +0200
From: Benjamin Mugnier <benjamin.mugnier@...s.st.com>
To: Julien Massot <julien.massot@...labora.com>, <kernel@...labora.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Sylvain Petinot
	<sylvain.petinot@...s.st.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
CC: <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] media: i2c: vgxy61: Report stream using frame descriptors

Hi Julien,

Thank you for your patch.

On 7/4/25 11:28, Julien Massot wrote:
> Add support for .get_frame_desc() to report CSI-2 virtual channel
> and data type information. This allows CSI-2 receivers to properly
> interpret the stream without inferring the data type from the pixel
> format.
> 
> Signed-off-by: Julien Massot <julien.massot@...labora.com>

Reviewed-by: Benjamin Mugnier <benjamin.mugnier@...s.st.com>

> ---
>  drivers/media/i2c/vgxy61.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/drivers/media/i2c/vgxy61.c b/drivers/media/i2c/vgxy61.c
> index 5b0479f3a3c0592be430cefe5a1ab9a76812ba84..44d6c8d8fbf8d6182e42d44e129bc45945ee0da5 100644
> --- a/drivers/media/i2c/vgxy61.c
> +++ b/drivers/media/i2c/vgxy61.c
> @@ -1181,6 +1181,21 @@ static int vgxy61_s_stream(struct v4l2_subdev *sd, int enable)
>  	return ret;
>  }
>  
> +static int vgxy61_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
> +				 struct v4l2_mbus_frame_desc *fd)
> +{
> +	struct vgxy61_dev *sensor = to_vgxy61_dev(sd);
> +
> +	fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
> +	fd->num_entries = 1;
> +	fd->entry[0].pixelcode = sensor->fmt.code;
> +	fd->entry[0].stream = 0;
> +	fd->entry[0].bus.csi2.vc = 0;
> +	fd->entry[0].bus.csi2.dt = get_data_type_by_code(sensor->fmt.code);
> +
> +	return 0;
> +}
> +
>  static int vgxy61_set_fmt(struct v4l2_subdev *sd,
>  			  struct v4l2_subdev_state *sd_state,
>  			  struct v4l2_subdev_format *format)
> @@ -1402,6 +1417,7 @@ static const struct v4l2_subdev_pad_ops vgxy61_pad_ops = {
>  	.set_fmt = vgxy61_set_fmt,
>  	.get_selection = vgxy61_get_selection,
>  	.enum_frame_size = vgxy61_enum_frame_size,
> +	.get_frame_desc = vgxy61_get_frame_desc,
>  };
>  
>  static const struct v4l2_subdev_ops vgxy61_subdev_ops = {
> 
> ---
> base-commit: 1343433ed38923a21425c602e92120a1f1db5f7a
> change-id: 20250704-vgxy61-frame-desc-2a6d3c6cab43
> 
> Best regards,

-- 
Regards,
Benjamin