media: rkisp1: isp: Use V4L2 subdev active state

Use the V4L2 subdev active state API to store the active format and crop
rectangle. This simplifies the driver not only by dropping the state
stored in the rkisp1_isp structure, but also by replacing the ops_lock
with the state lock.

The rkisp1_isp.sink_fmt field needs to be kept, as it is accessed from
the stats interrupt handler. To simplify the rkisp1_isp_set_sink_fmt()
implementation, the field is now set when starting the ISP, instead of
when setting the format.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/platform/rockchip/rkisp1/rkisp1-common.h

@@ -190,20 +190,14 @@ struct rkisp1_csi {
  * @sd:				v4l2_subdev variable
  * @rkisp1:			pointer to rkisp1_device
  * @pads:			media pads
- * @pad_cfg:			pads configurations
  * @sink_fmt:			input format
- * @src_fmt:			output format
- * @ops_lock:			ops serialization
  * @frame_sequence:		used to synchronize frame_id between video devices.
  */
 struct rkisp1_isp {
 	struct v4l2_subdev sd;
 	struct rkisp1_device *rkisp1;
 	struct media_pad pads[RKISP1_ISP_PAD_MAX];
-	struct v4l2_subdev_pad_config pad_cfg[RKISP1_ISP_PAD_MAX];
 	const struct rkisp1_mbus_info *sink_fmt;
-	const struct rkisp1_mbus_info *src_fmt;
-	struct mutex ops_lock; /* serialize the subdevice ops */
 	__u32 frame_sequence;
 };