media: atomisp: Propagate v4l2_mbus_framefmt.field to CSI port sink pad

Most sensor drivers report V4L2_FIELD_NONE as v4l2_mbus_framefmt.field
value. Propagate this to the v4l2_mbus_framefmt for the CSI port to pass
the link validation done by media_pipeline_start().

Keep the v4l2_mbus_framefmt.field for the source pad of the CSI port
as V4L2_FIELD_ANY to match the ISP sink pad.
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_csi2.c

@@ -107,9 +107,12 @@ int atomisp_csi2_set_ffmt(struct v4l2_subdev *sd,
 		actual_ffmt->height = clamp_t(u32, ffmt->height,
 					      ATOM_ISP_MIN_HEIGHT,
 					      ATOM_ISP_MAX_HEIGHT);
+		actual_ffmt->field = ffmt->field;
 
 		tmp_ffmt = *ffmt = *actual_ffmt;
 
+		/* Always use V4L2_FIELD_ANY to match the ISP sink pad */
+		tmp_ffmt.field = V4L2_FIELD_ANY;
 		return atomisp_csi2_set_ffmt(sd, sd_state, which,
 					     CSI2_PAD_SOURCE,
 					     &tmp_ffmt);