V4L/DVB: ivtv: support the new events API

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 41 insertions, 12 deletions

diff --git a/drivers/media/video/ivtv/ivtv-fileops.c b/drivers/media/video/ivtv/ivtv-fileops.c
index babcabd73c08..bee9605bd273 100644
--- a/drivers/media/video/ivtv/ivtv-fileops.c
+++ b/drivers/media/video/ivtv/ivtv-fileops.c
@@ -32,6 +32,7 @@
 #include "ivtv-yuv.h"
 #include "ivtv-ioctl.h"
 #include "ivtv-cards.h"
+#include <media/v4l2-event.h>
 #include <media/saa7115.h>
 
 /* This function tries to claim the stream for a specific file descriptor.
@@ -506,7 +507,7 @@ int ivtv_start_capture(struct ivtv_open_id *id)
 
 ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_t * pos)
 {
-	struct ivtv_open_id *id = filp->private_data;
+	struct ivtv_open_id *id = fh2id(filp->private_data);
 	struct ivtv *itv = id->itv;
 	struct ivtv_stream *s = &itv->streams[id->type];
 	int rc;
@@ -541,7 +542,7 @@ int ivtv_start_decoding(struct ivtv_open_id *id, int speed)
 
 ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos)
 {
-	struct ivtv_open_id *id = filp->private_data;
+	struct ivtv_open_id *id = fh2id(filp->private_data);
 	struct ivtv *itv = id->itv;
 	struct ivtv_stream *s = &itv->streams[id->type];
 	struct yuv_playback_info *yi = &itv->yuv_info;
@@ -711,19 +712,31 @@ retry:
 
 unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait)
 {
-	struct ivtv_open_id *id = filp->private_data;
+	struct ivtv_open_id *id = fh2id(filp->private_data);
 	struct ivtv *itv = id->itv;
 	struct ivtv_stream *s = &itv->streams[id->type];
 	int res = 0;
 
 	/* add stream's waitq to the poll list */
 	IVTV_DEBUG_HI_FILE("Decoder poll\n");
-	poll_wait(filp, &s->waitq, wait);
 
-	set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags);
-	if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) ||
-	    test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags))
-		res = POLLPRI;
+	/* If there are subscribed events, then only use the new event
+	   API instead of the old video.h based API. */
+	if (!list_empty(&id->fh.events->subscribed)) {
+		poll_wait(filp, &id->fh.events->wait, wait);
+		/* Turn off the old-style vsync events */
+		clear_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags);
+		if (v4l2_event_pending(&id->fh))
+			res = POLLPRI;
+	} else {
+		/* This is the old-style API which is here only for backwards
+		   compatibility. */
+		poll_wait(filp, &s->waitq, wait);
+		set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags);
+		if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) ||
+		    test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags))
+			res = POLLPRI;
+	}
 
 	/* Allow write if buffers are available for writing */
 	if (s->q_free.buffers)
@@ -733,7 +746,7 @@ unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait)
 
 unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table * wait)
 {
-	struct ivtv_open_id *id = filp->private_data;
+	struct ivtv_open_id *id = fh2id(filp->private_data);
 	struct ivtv *itv = id->itv;
 	struct ivtv_stream *s = &itv->streams[id->type];
 	int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
@@ -833,13 +846,16 @@ static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts)
 
 int ivtv_v4l2_close(struct file *filp)
 {
-	struct ivtv_open_id *id = filp->private_data;
+	struct v4l2_fh *fh = filp->private_data;
+	struct ivtv_open_id *id = fh2id(fh);
 	struct ivtv *itv = id->itv;
 	struct ivtv_stream *s = &itv->streams[id->type];
 
 	IVTV_DEBUG_FILE("close %s\n", s->name);
 
 	v4l2_prio_close(&itv->prio, &id->prio);
+	v4l2_fh_del(fh);
+	v4l2_fh_exit(fh);
 
 	/* Easy case first: this stream was never claimed by us */
 	if (s->id != id->open_id) {
@@ -895,6 +911,7 @@ static int ivtv_serialized_open(struct ivtv_stream *s, struct file *filp)
 {
 	struct ivtv *itv = s->itv;
 	struct ivtv_open_id *item;
+	int res = 0;
 
 	IVTV_DEBUG_FILE("open %s\n", s->name);
 
@@ -915,17 +932,27 @@ static int ivtv_serialized_open(struct ivtv_stream *s, struct file *filp)
 	}
 
 	/* Allocate memory */
-	item = kmalloc(sizeof(struct ivtv_open_id), GFP_KERNEL);
+	item = kzalloc(sizeof(struct ivtv_open_id), GFP_KERNEL);
 	if (NULL == item) {
 		IVTV_DEBUG_WARN("nomem on v4l2 open\n");
 		return -ENOMEM;
 	}
+	v4l2_fh_init(&item->fh, s->vdev);
+	if (s->type == IVTV_DEC_STREAM_TYPE_YUV ||
+	    s->type == IVTV_DEC_STREAM_TYPE_MPG) {
+		res = v4l2_event_alloc(&item->fh, 60);
+	}
+	if (res < 0) {
+		v4l2_fh_exit(&item->fh);
+		kfree(item);
+		return res;
+	}
 	item->itv = itv;
 	item->type = s->type;
 	v4l2_prio_open(&itv->prio, &item->prio);
 
 	item->open_id = itv->open_id++;
-	filp->private_data = item;
+	filp->private_data = &item->fh;
 
 	if (item->type == IVTV_ENC_STREAM_TYPE_RAD) {
 		/* Try to claim this stream */
@@ -940,6 +967,7 @@ static int ivtv_serialized_open(struct ivtv_stream *s, struct file *filp)
 				/* switching to radio while capture is
 				   in progress is not polite */
 				ivtv_release_stream(s);
+				v4l2_fh_exit(&item->fh);
 				kfree(item);
 				return -EBUSY;
 			}
@@ -970,6 +998,7 @@ static int ivtv_serialized_open(struct ivtv_stream *s, struct file *filp)
 				1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31);
 		itv->yuv_info.stream_size = 0;
 	}
+	v4l2_fh_add(&item->fh);
 	return 0;
 }