media: imx258: Register H/V flip controls

Register controls for V4L2_CID_HFLIP and V4L2_CID_VFLIP.

The controls are registered as read-only and enabled by default, as the
driver embeds a 180 degrees rotation in its programming sequences and
only supports that mode of operations.
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/i2c/imx258.c

@@ -1151,6 +1151,7 @@ static int imx258_init_controls(struct imx258 *imx258)
 	struct i2c_client *client = v4l2_get_subdevdata(&imx258->sd);
 	struct v4l2_fwnode_device_properties props;
 	struct v4l2_ctrl_handler *ctrl_hdlr;
+	struct v4l2_ctrl *vflip, *hflip;
 	s64 vblank_def;
 	s64 vblank_min;
 	s64 pixel_rate_min;
@@ -1158,7 +1159,7 @@ static int imx258_init_controls(struct imx258 *imx258)
 	int ret;
 
 	ctrl_hdlr = &imx258->ctrl_handler;
-	ret = v4l2_ctrl_handler_init(ctrl_hdlr, 11);
+	ret = v4l2_ctrl_handler_init(ctrl_hdlr, 13);
 	if (ret)
 		return ret;
 
@@ -1174,6 +1175,17 @@ static int imx258_init_controls(struct imx258 *imx258)
 	if (imx258->link_freq)
 		imx258->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 
+	/* The driver only supports one bayer order and flips by default. */
+	hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx258_ctrl_ops,
+				  V4L2_CID_HFLIP, 1, 1, 1, 1);
+	if (hflip)
+		hflip->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx258_ctrl_ops,
+				  V4L2_CID_VFLIP, 1, 1, 1, 1);
+	if (vflip)
+		vflip->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
 	pixel_rate_max = link_freq_to_pixel_rate(link_freq_menu_items[0]);
 	pixel_rate_min = link_freq_to_pixel_rate(link_freq_menu_items[1]);
 	/* By default, PIXEL_RATE is read only */