Re: [PATCH 2/2] media: amd: isp4: return capture buffers with V4L2_FIELD_NONE

[Bin Du <Bin.Du@amd.com>]

Reviewed-by: Bin Du <bin.du@amd.com>

On 10/27/2026 2:24 AM, Seifelden Abdelmonem wrote:
> 
> isp4vid_handle_frame_done() marks every completed buffer as
> V4L2_FIELD_ANY. V4L2_FIELD_ANY is only valid as a request from the
> application; a dequeued buffer must report the field order of the
> image it contains. v4l2-compliance therefore fails the first MMAP
> streaming test:
> 
>   fail: v4l2-test-buffers.cpp(419): g_field() == V4L2_FIELD_ANY
>   fail: v4l2-test-buffers.cpp(1280): buf.check(q, last_seq)
>   fail: v4l2-test-buffers.cpp(1735): captureBufs(...)
>   test MMAP (no poll, REQBUFS): FAIL
> 
> The ISP only produces progressive frames, and the format ioctls already
> report V4L2_FIELD_NONE (isp4vid_fmt_default). Use V4L2_FIELD_NONE for
> the returned buffers as well. With this change that test passes.
> 
> Fixes: 2ccf48af2270 ("media: platform: amd: isp4 video node and buffers handling added")
> Signed-off-by: Seifelden Abdelmonem <saif.elden.hatim@gmail.com>
> ---
> Testing and AI use: see the cover letter.
> 
>  drivers/media/platform/amd/isp4/isp4_video.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/amd/isp4/isp4_video.c b/drivers/media/platform/amd/isp4/isp4_video.c
> index 58ea8d6ac..b8af3c766 100644
> --- a/drivers/media/platform/amd/isp4/isp4_video.c
> +++ b/drivers/media/platform/amd/isp4/isp4_video.c
> @@ -72,7 +72,7 @@ void isp4vid_handle_frame_done(struct isp4vid_dev *isp_vdev,
>         /* Fill the buffer */
>         isp4vid_buf->vb2.vb2_buf.timestamp = ktime_get_ns();
>         isp4vid_buf->vb2.sequence = isp_vdev->sequence++;
> -       isp4vid_buf->vb2.field = V4L2_FIELD_ANY;
> +       isp4vid_buf->vb2.field = V4L2_FIELD_NONE;
> 
>         vb2_set_plane_payload(&isp4vid_buf->vb2.vb2_buf,
>                               0, isp_vdev->format.sizeimage);
> --
> 2.56.0