[PATCH 16/16] media: sun6i-isp: Add support for frame size enumeration

[arash golgol]

Hi Paul,

On Mon, May 18, 2026 at 2:02 PM Paul Kocialkowski <paulk at sys-base.io> wrote:
>
> This implements the enum_framesizes operation, which reports support for
> even sizes.
>
> Signed-off-by: Paul Kocialkowski <paulk at sys-base.io>
> ---
>  .../media/sunxi/sun6i-isp/sun6i_isp_capture.c | 22 +++++++++++++++++++
>  1 file changed, 22 insertions(+)
>
> diff --git a/drivers/staging/media/sunxi/sun6i-isp/sun6i_isp_capture.c b/drivers/staging/media/sunxi/sun6i-isp/sun6i_isp_capture.c
> index 372b9331bd6d..e638ec32c7cd 100644
> --- a/drivers/staging/media/sunxi/sun6i-isp/sun6i_isp_capture.c
> +++ b/drivers/staging/media/sunxi/sun6i-isp/sun6i_isp_capture.c
> @@ -452,6 +452,26 @@ static int sun6i_isp_capture_enum_fmt(struct file *file, void *priv,
>         return 0;
>  }
>
> +static int sun6i_isp_capture_enum_framesizes(struct file *file, void *fh,
> +                                            struct v4l2_frmsizeenum *frmsize)
> +{
> +       if (frmsize->index)
> +               return -EINVAL;
> +
> +       if (!sun6i_isp_capture_format_find(frmsize->pixel_format))
> +               return -EINVAL;
> +
> +       frmsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
> +       frmsize->stepwise.min_width = SUN6I_ISP_CAPTURE_WIDTH_MIN;
> +       frmsize->stepwise.max_width = SUN6I_ISP_CAPTURE_WIDTH_MAX;
> +       frmsize->stepwise.min_height = SUN6I_ISP_CAPTURE_HEIGHT_MIN;
> +       frmsize->stepwise.max_height = SUN6I_ISP_CAPTURE_HEIGHT_MAX;
> +       frmsize->stepwise.step_width = 2;
> +       frmsize->stepwise.step_height = 2;
> +
> +       return 0;
> +}
> +
>  static int sun6i_isp_capture_g_fmt(struct file *file, void *priv,
>                                    struct v4l2_format *format)
>  {
> @@ -522,6 +542,8 @@ static const struct v4l2_ioctl_ops sun6i_isp_capture_ioctl_ops = {
>         .vidioc_s_fmt_vid_cap           = sun6i_isp_capture_s_fmt,
>         .vidioc_try_fmt_vid_cap         = sun6i_isp_capture_try_fmt,
>
> +       .vidioc_enum_framesizes         = sun6i_isp_capture_enum_framesizes,
> +
>         .vidioc_enum_input              = sun6i_isp_capture_enum_input,
>         .vidioc_g_input                 = sun6i_isp_capture_g_input,
>         .vidioc_s_input                 = sun6i_isp_capture_s_input,
> --
> 2.54.0
>

Tested on a LicheePi Zero Dock (V3s) with the ov5647 camera setup.

The enum_framesizes implementation behaves as expected and reports the
supported even frame sizes correctly.

Tested-by: Arash Golgol <arash.golgol at gmail.com>
Reviewed-by: Arash Golgol <arash.golgol at gmail.com>

-- 
Regards,
Arash Golgol