[media] omap3isp: ccdc: Add basic support for interlaced video

When the CCDC input is interlaced enable the alternate field order on
the CCDC output video node. The field signal polarity is specified
through platform data.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Enrico Butera <ebutera@users.sourceforge.net>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c
index 756c1628ef86..c38f1d4cc538 100644
--- a/drivers/media/platform/omap3isp/ispvideo.c
+++ b/drivers/media/platform/omap3isp/ispvideo.c
@@ -482,6 +482,11 @@ struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
         else
                 buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number);
 
+        if (pipe->field != V4L2_FIELD_NONE)
+                buf->vb.v4l2_buf.sequence /= 2;
+
+        buf->vb.v4l2_buf.field = pipe->field;
+
         /* Report pipeline errors to userspace on the capture device side. */
         if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
                 state = VB2_BUF_STATE_ERROR;
@@ -1038,6 +1043,7 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
         video->queue = &vfh->queue;
         INIT_LIST_HEAD(&video->dmaqueue);
         atomic_set(&pipe->frame_number, -1);
+        pipe->field = vfh->format.fmt.pix.field;
 
         mutex_lock(&video->queue_lock);
         ret = vb2_streamon(&vfh->queue, type);