merge: http://linuxtv.org/hg/~tap/v4l-dvb

From: Mauro Carvalho Chehab <mchehab@infradead.org>



Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 84 insertions, 57 deletions

diff --git a/linux/drivers/media/video/ivtv/ivtv-fileops.c b/linux/drivers/media/video/ivtv/ivtv-fileops.c
index 8ce2edf8a..109c8c6c9 100644
--- a/linux/drivers/media/video/ivtv/ivtv-fileops.c
+++ b/linux/drivers/media/video/ivtv/ivtv-fileops.c
@@ -245,8 +245,9 @@ static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block,
 		/* do we have new data? */
 		buf = ivtv_dequeue(s, &s->q_full);
 		if (buf) {
-			if (!test_and_clear_bit(IVTV_F_B_NEED_BUF_SWAP, &buf->b_flags))
+			if ((buf->b_flags & IVTV_F_B_NEED_BUF_SWAP) == 0)
 				return buf;
+			buf->b_flags &= ~IVTV_F_B_NEED_BUF_SWAP;
 			if (s->type == IVTV_ENC_STREAM_TYPE_MPG)
 				/* byteswap MPG data */
 				ivtv_buf_swap(buf);
@@ -406,7 +407,7 @@ static ssize_t ivtv_read_pos(struct ivtv_stream *s, char __user *ubuf, size_t co
 	ssize_t rc = count ? ivtv_read(s, ubuf, count, non_block) : 0;
 	struct ivtv *itv = s->itv;
 
-	IVTV_DEBUG_HI_INFO("read %zd from %s, got %zd\n", count, s->name, rc);
+	IVTV_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc);
 	if (rc > 0)
 		pos += rc;
 	return rc;
@@ -497,9 +498,11 @@ ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_
 	struct ivtv_stream *s = &itv->streams[id->type];
 	int rc;
 
-	IVTV_DEBUG_HI_IOCTL("read %zd bytes from %s\n", count, s->name);
+	IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name);
 
+	mutex_lock(&itv->serialize_lock);
 	rc = ivtv_start_capture(id);
+	mutex_unlock(&itv->serialize_lock);
 	if (rc)
 		return rc;
 	return ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK);
@@ -535,7 +538,7 @@ ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t c
 	int rc;
 	DEFINE_WAIT(wait);
 
-	IVTV_DEBUG_HI_IOCTL("write %zd bytes to %s\n", count, s->name);
+	IVTV_DEBUG_HI_FILE("write %zd bytes to %s\n", count, s->name);
 
 	if (s->type != IVTV_DEC_STREAM_TYPE_MPG &&
 	    s->type != IVTV_DEC_STREAM_TYPE_YUV &&
@@ -610,7 +613,9 @@ retry:
 	}
 
 	/* Start decoder (returns 0 if already started) */
+	mutex_lock(&itv->serialize_lock);
 	rc = ivtv_start_decoding(id, itv->speed);
+	mutex_unlock(&itv->serialize_lock);
 	if (rc) {
 		IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name);
 
@@ -643,7 +648,7 @@ retry:
 	   to transfer the rest. */
 	if (count && !(filp->f_flags & O_NONBLOCK))
 		goto retry;
-	IVTV_DEBUG_HI_INFO("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused);
+	IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused);
 	return bytes_written;
 }
 
@@ -655,6 +660,7 @@ unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait)
 	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);
@@ -677,16 +683,21 @@ unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table * wait)
 
 	/* Start a capture if there is none */
 	if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
-		int rc = ivtv_start_capture(id);
+		int rc;
 
+		mutex_lock(&itv->serialize_lock);
+		rc = ivtv_start_capture(id);
+		mutex_unlock(&itv->serialize_lock);
 		if (rc) {
 			IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n",
 					s->name, rc);
 			return POLLERR;
 		}
+		IVTV_DEBUG_FILE("Encoder poll started capture\n");
 	}
 
 	/* add stream's waitq to the poll list */
+	IVTV_DEBUG_HI_FILE("Encoder poll\n");
 	poll_wait(filp, &s->waitq, wait);
 
 	if (eof || s->q_full.length)
@@ -699,7 +710,7 @@ void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end)
 	struct ivtv *itv = id->itv;
 	struct ivtv_stream *s = &itv->streams[id->type];
 
-	IVTV_DEBUG_IOCTL("close() of %s\n", s->name);
+	IVTV_DEBUG_FILE("close() of %s\n", s->name);
 
 	/* 'Unclaim' this stream */
 
@@ -737,7 +748,7 @@ static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts)
 	struct ivtv *itv = id->itv;
 	struct ivtv_stream *s = &itv->streams[id->type];
 
-	IVTV_DEBUG_IOCTL("close() of %s\n", s->name);
+	IVTV_DEBUG_FILE("close() of %s\n", s->name);
 
 	/* Stop decoding */
 	if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
@@ -752,9 +763,11 @@ static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts)
 		ivtv_yuv_close(itv);
 	}
 	if (s->type == IVTV_DEC_STREAM_TYPE_YUV && itv->output_mode == OUT_YUV)
-	    itv->output_mode = OUT_NONE;
+		itv->output_mode = OUT_NONE;
+	else if (s->type == IVTV_DEC_STREAM_TYPE_YUV && itv->output_mode == OUT_UDMA_YUV)
+		itv->output_mode = OUT_NONE;
 	else if (s->type == IVTV_DEC_STREAM_TYPE_MPG && itv->output_mode == OUT_MPG)
-	    itv->output_mode = OUT_NONE;
+		itv->output_mode = OUT_NONE;
 
 	itv->speed = 0;
 	clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags);
@@ -767,7 +780,7 @@ int ivtv_v4l2_close(struct inode *inode, struct file *filp)
 	struct ivtv *itv = id->itv;
 	struct ivtv_stream *s = &itv->streams[id->type];
 
-	IVTV_DEBUG_IOCTL("close() of %s\n", s->name);
+	IVTV_DEBUG_FILE("close %s\n", s->name);
 
 	v4l2_prio_close(&itv->prio, &id->prio);
 
@@ -780,6 +793,7 @@ int ivtv_v4l2_close(struct inode *inode, struct file *filp)
 	/* 'Unclaim' this stream */
 
 	/* Stop radio */
+	mutex_lock(&itv->serialize_lock);
 	if (id->type == IVTV_ENC_STREAM_TYPE_RAD) {
 		/* Closing radio device, return to TV mode */
 		ivtv_mute(itv);
@@ -814,52 +828,26 @@ int ivtv_v4l2_close(struct inode *inode, struct file *filp)
 		ivtv_stop_capture(id, 0);
 	}
 	kfree(id);
+	mutex_unlock(&itv->serialize_lock);
 	return 0;
 }
 
-int ivtv_v4l2_open(struct inode *inode, struct file *filp)
+static int ivtv_serialized_open(struct ivtv_stream *s, struct file *filp)
 {
-	int x, y = 0;
+	struct ivtv *itv = s->itv;
 	struct ivtv_open_id *item;
-	struct ivtv *itv = NULL;
-	struct ivtv_stream *s = NULL;
-	int minor = iminor(inode);
 
-	/* Find which card this open was on */
-	spin_lock(&ivtv_cards_lock);
-	for (x = 0; itv == NULL && x < ivtv_cards_active; x++) {
-		/* find out which stream this open was on */
-		for (y = 0; y < IVTV_MAX_STREAMS; y++) {
-			s = &ivtv_cards[x]->streams[y];
-			if (s->v4l2dev && s->v4l2dev->minor == minor) {
-				itv = ivtv_cards[x];
-				break;
-			}
-		}
-	}
-	spin_unlock(&ivtv_cards_lock);
+	IVTV_DEBUG_FILE("open %s\n", s->name);
 
-	if (itv == NULL) {
-		/* Couldn't find a device registered
-		   on that minor, shouldn't happen! */
-		IVTV_WARN("No ivtv device found on minor %d\n", minor);
-		return -ENXIO;
-	}
-
-	if (ivtv_init_on_first_open(itv)) {
-		IVTV_ERR("Failed to initialize on minor %d\n", minor);
-		return -ENXIO;
-	}
-
-	if (y == IVTV_DEC_STREAM_TYPE_MPG &&
+	if (s->type == IVTV_DEC_STREAM_TYPE_MPG &&
 		test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags))
 		return -EBUSY;
 
-	if (y == IVTV_DEC_STREAM_TYPE_YUV &&
+	if (s->type == IVTV_DEC_STREAM_TYPE_YUV &&
 		test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags))
 		return -EBUSY;
 
-	if (y == IVTV_DEC_STREAM_TYPE_YUV) {
+	if (s->type == IVTV_DEC_STREAM_TYPE_YUV) {
 		if (read_reg(0x82c) == 0) {
 			IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n");
 			/* return -ENODEV; */
@@ -874,7 +862,7 @@ int ivtv_v4l2_open(struct inode *inode, struct file *filp)
 		return -ENOMEM;
 	}
 	item->itv = itv;
-	item->type = y;
+	item->type = s->type;
 	v4l2_prio_open(&itv->prio, &item->prio);
 
 	item->open_id = itv->open_id++;
@@ -888,12 +876,20 @@ int ivtv_v4l2_open(struct inode *inode, struct file *filp)
 			return -EBUSY;
 		}
 
+		if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) {
+			if (atomic_read(&itv->capturing) > 0) {
+				/* switching to radio while capture is
+				   in progress is not polite */
+				kfree(item);
+				return -EBUSY;
+			}
+		}
+		/* Mark that the radio is being used. */
+		set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
 		/* We have the radio */
 		ivtv_mute(itv);
 		/* Switch tuner to radio */
 		ivtv_call_i2c_clients(itv, AUDC_SET_RADIO, NULL);
-		/* Mark that the radio is being used. */
-		set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags);
 		/* Select the correct audio input (i.e. radio tuner) */
 		ivtv_audio_set_io(itv);
 		if (itv->hw_flags & IVTV_HW_SAA711X)
@@ -908,14 +904,50 @@ int ivtv_v4l2_open(struct inode *inode, struct file *filp)
 	}
 
 	/* YUV or MPG Decoding Mode? */
-	if (y == IVTV_DEC_STREAM_TYPE_MPG)
+	if (s->type == IVTV_DEC_STREAM_TYPE_MPG)
 		clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
-	else if (y == IVTV_DEC_STREAM_TYPE_YUV)
-	{
+	else if (s->type == IVTV_DEC_STREAM_TYPE_YUV)
 		set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags);
+	return 0;
+}
+
+int ivtv_v4l2_open(struct inode *inode, struct file *filp)
+{
+	int res, x, y = 0;
+	struct ivtv *itv = NULL;
+	struct ivtv_stream *s = NULL;
+	int minor = iminor(inode);
+
+	/* Find which card this open was on */
+	spin_lock(&ivtv_cards_lock);
+	for (x = 0; itv == NULL && x < ivtv_cards_active; x++) {
+		/* find out which stream this open was on */
+		for (y = 0; y < IVTV_MAX_STREAMS; y++) {
+			s = &ivtv_cards[x]->streams[y];
+			if (s->v4l2dev && s->v4l2dev->minor == minor) {
+				itv = ivtv_cards[x];
+				break;
+			}
+		}
 	}
+	spin_unlock(&ivtv_cards_lock);
 
-	return 0;
+	if (itv == NULL) {
+		/* Couldn't find a device registered
+		   on that minor, shouldn't happen! */
+		IVTV_WARN("No ivtv device found on minor %d\n", minor);
+		return -ENXIO;
+	}
+
+	mutex_lock(&itv->serialize_lock);
+	if (ivtv_init_on_first_open(itv)) {
+		IVTV_ERR("Failed to initialize on minor %d\n", minor);
+		mutex_unlock(&itv->serialize_lock);
+		return -ENXIO;
+	}
+	res = ivtv_serialized_open(s, filp);
+	mutex_unlock(&itv->serialize_lock);
+	return res;
 }
 
 void ivtv_mute(struct ivtv *itv)
@@ -927,13 +959,8 @@ void ivtv_mute(struct ivtv *itv)
 
 void ivtv_unmute(struct ivtv *itv)
 {
-	/* initialize or refresh input */
-	if (atomic_read(&itv->capturing) == 0)
-		ivtv_vapi(itv, CX2341X_ENC_INITIALIZE_INPUT, 0);
-
-	ivtv_msleep_timeout(100, 0);
-
 	if (atomic_read(&itv->capturing)) {
+		ivtv_msleep_timeout(100, 0);
 		ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12);
 		ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0);
 	}