[PATCH] media: nxp: imx8-isi: fix m2m device v4l2-compliance test errors

[Laurentiu Palcu]

Running the v4l2-compliance (1.27.0-5208, SHA: af114250d48d) on the m2m
device fails on the MMAP streaming tests, with the following messages:

fail: v4l2-test-buffers.cpp(240): g_field() == V4L2_FIELD_ANY
fail: v4l2-test-buffers.cpp(1508): buf.qbuf(node)

Apparently, the driver does not properly set the field member of
vb2_v4l2_buffer struct, returning the default V4L2_FIELD_ANY value which
is against the guidelines.

Fixes: cf21f328fcafac ("media: nxp: Add i.MX8 ISI driver")
Signed-off-by: Laurentiu Palcu <laurentiu.palcu at oss.nxp.com>
---
 drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c
index b71195a3ba256..3f0c9e2ac802d 100644
--- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c
+++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-m2m.c
@@ -222,6 +222,11 @@ static int mxc_isi_m2m_vb2_buffer_prepare(struct vb2_buffer *vb2)
 	struct mxc_isi_m2m_ctx *ctx = vb2_get_drv_priv(vq);
 	const struct mxc_isi_m2m_ctx_queue_data *qdata =
 		mxc_isi_m2m_ctx_qdata(ctx, vq->type);
+	struct vb2_v4l2_buffer *v4l2_buf = to_vb2_v4l2_buffer(vb2);
+
+	v4l2_buf->field = vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE ?
+			  ctx->queues.out.format.field :
+			  ctx->queues.cap.format.field;
 
 	return mxc_isi_video_buffer_prepare(ctx->m2m->isi, vb2, qdata->info,
 					    &qdata->format);
-- 
2.34.1