[PATCH 13/13] media: coda: fix unset field and fail on invalid field in buf_prepare

[Philipp Zabel]

v4l2-compliance likes to queue a buffer with field set to V4L2_FIELD_ANY
and expects it to be returned corrected to a valid field.

Follow vicodec in handling this in the buf_prepare callback.

Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
---
 drivers/media/platform/coda/coda-common.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/media/platform/coda/coda-common.c 
b/drivers/media/platform/coda/coda-common.c
index 1cd0fb5b1c5b..1d8e0a045df1 100644
--- a/drivers/media/platform/coda/coda-common.c
+++ b/drivers/media/platform/coda/coda-common.c
@@ -1515,10 +1515,20 @@ static int coda_queue_setup(struct vb2_queue *vq,
 
 static int coda_buf_prepare(struct vb2_buffer *vb)
 {
+       struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
        struct coda_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
        struct coda_q_data *q_data;
 
        q_data = get_q_data(ctx, vb->vb2_queue->type);
+       if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
+               if (vbuf->field == V4L2_FIELD_ANY)
+                       vbuf->field = V4L2_FIELD_NONE;
+               if (vbuf->field != V4L2_FIELD_NONE) {
+                       v4l2_warn(&ctx->dev->v4l2_dev,
+                                 "%s field isn't supported\n", __func__);
+                       return -EINVAL;
+               }
+       }
 
        if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
                v4l2_warn(&ctx->dev->v4l2_dev,
-- 
2.20.1