[media] media: davinci: vpfe: use v4l2_fh for priority handling

This patch migrates the vpfe driver to use v4l2_fh for
priority handling.
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/davinci/vpfe_capture.c

@@ -498,6 +498,7 @@ static int vpfe_initialize_device(struct vpfe_device *vpfe_dev)
 static int vpfe_open(struct file *file)
 {
 	struct vpfe_device *vpfe_dev = video_drvdata(file);
+	struct video_device *vdev = video_devdata(file);
 	struct vpfe_fh *fh;
 
 	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_open\n");
@@ -517,6 +518,7 @@ static int vpfe_open(struct file *file)
 	/* store pointer to fh in private_data member of file */
 	file->private_data = fh;
 	fh->vpfe_dev = vpfe_dev;
+	v4l2_fh_init(&fh->fh, vdev);
 	mutex_lock(&vpfe_dev->lock);
 	/* If decoder is not initialized. initialize it */
 	if (!vpfe_dev->initialized) {
@@ -529,9 +531,7 @@ static int vpfe_open(struct file *file)
 	vpfe_dev->usrs++;
 	/* Set io_allowed member to false */
 	fh->io_allowed = 0;
-	/* Initialize priority of this instance to default priority */
-	fh->prio = V4L2_PRIORITY_UNSET;
-	v4l2_prio_open(&vpfe_dev->prio, &fh->prio);
+	v4l2_fh_add(&fh->fh);
 	mutex_unlock(&vpfe_dev->lock);
 	return 0;
 }
@@ -740,8 +740,8 @@ static int vpfe_release(struct file *file)
 
 	/* Decrement device usrs counter */
 	vpfe_dev->usrs--;
-	/* Close the priority */
-	v4l2_prio_close(&vpfe_dev->prio, fh->prio);
+	v4l2_fh_del(&fh->fh);
+	v4l2_fh_exit(&fh->fh);
 	/* If this is the last file handle */
 	if (!vpfe_dev->usrs) {
 		vpfe_dev->initialized = 0;
@@ -1910,14 +1910,13 @@ static int vpfe_probe(struct platform_device *pdev)
 	/* Initialize field of the device objects */
 	vpfe_dev->numbuffers = config_params.numbuffers;
 
-	/* Initialize prio member of device object */
-	v4l2_prio_init(&vpfe_dev->prio);
 	/* register video device */
 	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
 		"trying to register vpfe device.\n");
 	v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
 		"video_dev=%x\n", (int)&vpfe_dev->video_dev);
 	vpfe_dev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	set_bit(V4L2_FL_USE_FH_PRIO, &vpfe_dev->video_dev->flags);
 	ret = video_register_device(vpfe_dev->video_dev,
 				    VFL_TYPE_GRABBER, -1);
 

include/media/davinci/vpfe_capture.h

@@ -26,6 +26,7 @@
 #include <linux/videodev2.h>
 #include <linux/clk.h>
 #include <linux/i2c.h>
+#include <media/v4l2-fh.h>
 #include <media/v4l2-ioctl.h>
 #include <media/v4l2-device.h>
 #include <media/videobuf-dma-contig.h>
@@ -110,8 +111,6 @@ struct vpfe_device {
 	struct v4l2_device v4l2_dev;
 	/* parent device */
 	struct device *pdev;
-	/* Used to keep track of state of the priority */
-	struct v4l2_prio_state prio;
 	/* number of open instances of the channel */
 	u32 usrs;
 	/* Indicates id of the field which is being displayed */
@@ -174,11 +173,10 @@ struct vpfe_device {
 
 /* File handle structure */
 struct vpfe_fh {
+	struct v4l2_fh fh;
 	struct vpfe_device *vpfe_dev;
 	/* Indicates whether this file handle is doing IO */
 	u8 io_allowed;
-	/* Used to keep track priority of this instance */
-	enum v4l2_priority prio;
 };
 
 struct vpfe_config_params {