[media] s5p-fimc: Convert to the new control framework

Convert the v4l controls code to use the new control framework.

fimc_ctrls_activate/deactivate functions are introduced for the
transparent DMA transfer mode (JPEG), where the rotation and flipping
controls are not supported.

The capture video node does not inherit sensors' controls when the
subdevs are configured by the user space (user_subdev_api == true).
However by default after the driver's initialization
the 'user-subdev_api' flag is false and any sensor controls will
also be available at the video node.

When the pipeline links are disconnected through the media device
the FIMC and any sensor inherited controls are destroyed and then
again created when the pipeline connection completes.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/s5p-fimc/fimc-capture.c

@@ -27,6 +27,7 @@
 #include <media/videobuf2-core.h>
 #include <media/videobuf2-dma-contig.h>
 
+#include "fimc-mdevice.h"
 #include "fimc-core.h"
 
 static void fimc_capture_state_cleanup(struct fimc_dev *fimc)
@@ -273,6 +274,31 @@ static struct vb2_ops fimc_capture_qops = {
 	.stop_streaming		= stop_streaming,
 };
 
+/**
+ * fimc_capture_ctrls_create - initialize the control handler
+ * Initialize the capture video node control handler and fill it
+ * with the FIMC controls. Inherit any sensor's controls if the
+ * 'user_subdev_api' flag is false (default behaviour).
+ * This function need to be called with the graph mutex held.
+ */
+int fimc_capture_ctrls_create(struct fimc_dev *fimc)
+{
+	struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
+	int ret;
+
+	if (WARN_ON(vid_cap->ctx == NULL))
+		return -ENXIO;
+	if (vid_cap->ctx->ctrls_rdy)
+		return 0;
+
+	ret = fimc_ctrls_create(vid_cap->ctx);
+	if (ret || vid_cap->user_subdev_api)
+		return ret;
+
+	return v4l2_ctrl_add_handler(&vid_cap->ctx->ctrl_handler,
+				    fimc->pipeline.sensor->ctrl_handler);
+}
+
 static int fimc_capture_open(struct file *file)
 {
 	struct fimc_dev *fimc = video_drvdata(file);
@@ -293,9 +319,10 @@ static int fimc_capture_open(struct file *file)
 		return ret;
 	}
 
-	++fimc->vid_cap.refcnt;
+	if (++fimc->vid_cap.refcnt == 1)
+		ret = fimc_capture_ctrls_create(fimc);
 
-	return 0;
+	return ret;
 }
 
 static int fimc_capture_close(struct file *file)
@@ -306,6 +333,7 @@ static int fimc_capture_close(struct file *file)
 
 	if (--fimc->vid_cap.refcnt == 0) {
 		fimc_stop_capture(fimc);
+		fimc_ctrls_delete(fimc->vid_cap.ctx);
 		vb2_queue_release(&fimc->vid_cap.vbq);
 	}
 
@@ -546,30 +574,6 @@ static int fimc_cap_dqbuf(struct file *file, void *priv,
 	return vb2_dqbuf(&fimc->vid_cap.vbq, buf, file->f_flags & O_NONBLOCK);
 }
 
-static int fimc_cap_s_ctrl(struct file *file, void *priv,
-			   struct v4l2_control *ctrl)
-{
-	struct fimc_dev *fimc = video_drvdata(file);
-	struct fimc_ctx *ctx = fimc->vid_cap.ctx;
-	int ret = -EINVAL;
-
-	/* Allow any controls but 90/270 rotation while streaming */
-	if (!fimc_capture_active(ctx->fimc_dev) ||
-	    ctrl->id != V4L2_CID_ROTATE ||
-	    (ctrl->value != 90 && ctrl->value != 270)) {
-		ret = check_ctrl_val(ctx, ctrl);
-		if (!ret) {
-			ret = fimc_s_ctrl(ctx, ctrl);
-			if (!ret)
-				ctx->state |= FIMC_PARAMS;
-		}
-	}
-	if (ret == -EINVAL)
-		ret = v4l2_subdev_call(ctx->fimc_dev->vid_cap.sd,
-				       core, s_ctrl, ctrl);
-	return ret;
-}
-
 static int fimc_cap_cropcap(struct file *file, void *fh,
 			    struct v4l2_cropcap *cr)
 {
@@ -656,10 +660,6 @@ static const struct v4l2_ioctl_ops fimc_capture_ioctl_ops = {
 	.vidioc_streamon		= fimc_cap_streamon,
 	.vidioc_streamoff		= fimc_cap_streamoff,
 
-	.vidioc_queryctrl		= fimc_vidioc_queryctrl,
-	.vidioc_g_ctrl			= fimc_vidioc_g_ctrl,
-	.vidioc_s_ctrl			= fimc_cap_s_ctrl,
-
 	.vidioc_g_crop			= fimc_cap_g_crop,
 	.vidioc_s_crop			= fimc_cap_s_crop,
 	.vidioc_cropcap			= fimc_cap_cropcap,
@@ -743,6 +743,7 @@ int fimc_register_capture_device(struct fimc_dev *fimc,
 	if (ret)
 		goto err_ent;
 
+	vfd->ctrl_handler = &ctx->ctrl_handler;
 	return 0;
 
 err_ent: