media: i2c: imx219: Initialize ycbcr_enc

While the ycbcr_enc field doesn't apply to raw formats, leaving it
uninitialized makes the driver behave in a less deterministic way. Fix
it by picking the default value for the colorspace.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/i2c/imx219.c

@@ -495,6 +495,7 @@ static void imx219_update_pad_format(struct imx219 *imx219,
 	fmt->height = mode->height;
 	fmt->field = V4L2_FIELD_NONE;
 	fmt->colorspace = V4L2_COLORSPACE_RAW;
+	fmt->ycbcr_enc = V4L2_YCBCR_ENC_601;
 	fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
 	fmt->xfer_func = V4L2_XFER_FUNC_NONE;
 }