media: rcar-vin: Gen3 can not scale NV12

The VIN modules on Gen3 can not scale NV12, fail format validation if
the user tries. Currently no frames are produced if this is attempted.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

diff --git a/drivers/media/platform/renesas/rcar-vin/rcar-dma.c b/drivers/media/platform/renesas/rcar-vin/rcar-dma.c
index 98bfd445a649bcc4d32a217988dfcac0b6e51912..cc6b59e5621aef042db200aa4af5946c2e75d92b 100644 (file)
--- a/drivers/media/platform/renesas/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/renesas/rcar-vin/rcar-dma.c
@@ -1312,6 +1312,11 @@ static int rvin_mc_validate_format(struct rvin_dev *vin, struct v4l2_subdev *sd,
        }
 
        if (rvin_scaler_needed(vin)) {
+               /* Gen3 can't scale NV12 */
+               if (vin->info->model == RCAR_GEN3 &&
+                   vin->format.pixelformat == V4L2_PIX_FMT_NV12)
+                       return -EPIPE;
+
                if (!vin->scaler)
                        return -EPIPE;
        } else {