V4L/DVB (9805): cx18: Port fix for raw/sliced VBI mixup from ivtv and cx25840

This is a port of the fixes Hans Verkuil made for ivtv/cx25840:
The service_set field was used to determine whether raw or sliced VBI was
desired. This is incorrect since it is perfectly valid to select sliced VBI
with a service_set of 0.

Instead the driver should check on VIDIOC_S_FMT whether the type
field matches the raw or sliced VBI type.

Updated the cx18 driver accordingly, including an additional check in
cx18_start_v4l2_encode_stream() that didn't exist in ivtv.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

7 files changed, 21 insertions, 17 deletions

diff --git a/drivers/media/video/cx18/cx18-av-vbi.c b/drivers/media/video/cx18/cx18-av-vbi.c
index 02fdf57bb67..1527ea4f6b0 100644
--- a/drivers/media/video/cx18/cx18-av-vbi.c
+++ b/drivers/media/video/cx18/cx18-av-vbi.c
@@ -141,10 +141,11 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg)
                 u8 lcr[24];
 
                 fmt = arg;
-                if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
+                if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE &&
+                    fmt->type != V4L2_BUF_TYPE_VBI_CAPTURE)
                         return -EINVAL;
                 svbi = &fmt->fmt.sliced;
-                if (svbi->service_set == 0) {
+                if (fmt->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
                         /* raw VBI */
                         memset(svbi, 0, sizeof(*svbi));
 
diff --git a/drivers/media/video/cx18/cx18-driver.c b/drivers/media/video/cx18/cx18-driver.c
index 255d5477567..e845cd653bb 100644
--- a/drivers/media/video/cx18/cx18-driver.c
+++ b/drivers/media/video/cx18/cx18-driver.c
@@ -594,7 +594,7 @@ static int __devinit cx18_init_struct1(struct cx18 *cx)
         init_waitqueue_head(&cx->dma_waitq);
 
         /* VBI */
-        cx->vbi.in.type = V4L2_BUF_TYPE_SLICED_VBI_CAPTURE;
+        cx->vbi.in.type = V4L2_BUF_TYPE_VBI_CAPTURE;
         cx->vbi.sliced_in = &cx->vbi.in.fmt.sliced;
         cx->vbi.raw_size = 1456;
         cx->vbi.raw_decoder_line_size = 1456;
diff --git a/drivers/media/video/cx18/cx18-driver.h b/drivers/media/video/cx18/cx18-driver.h
index 29c296f39f9..018d98f94f9 100644
--- a/drivers/media/video/cx18/cx18-driver.h
+++ b/drivers/media/video/cx18/cx18-driver.h
@@ -504,4 +504,10 @@ void cx18_read_eeprom(struct cx18 *cx, struct tveeprom *tv);
 /* First-open initialization: load firmware, etc. */
 int cx18_init_on_first_open(struct cx18 *cx);
 
+/* Test if the current VBI mode is raw (1) or sliced (0) */
+static inline int cx18_raw_vbi(const struct cx18 *cx)
+{
+        return cx->vbi.in.type == V4L2_BUF_TYPE_VBI_CAPTURE;
+}
+
 #endif /* CX18_DRIVER_H */
diff --git a/drivers/media/video/cx18/cx18-fileops.c b/drivers/media/video/cx18/cx18-fileops.c
index 61192e62a80..1856d59e0cf 100644
--- a/drivers/media/video/cx18/cx18-fileops.c
+++ b/drivers/media/video/cx18/cx18-fileops.c
@@ -67,12 +67,11 @@ static int cx18_claim_stream(struct cx18_open_id *id, int type)
         }
         s->id = id->open_id;
 
-        /* CX18_DEC_STREAM_TYPE_MPG needs to claim CX18_DEC_STREAM_TYPE_VBI,
-           CX18_ENC_STREAM_TYPE_MPG needs to claim CX18_ENC_STREAM_TYPE_VBI
+        /* CX18_ENC_STREAM_TYPE_MPG needs to claim CX18_ENC_STREAM_TYPE_VBI
            (provided VBI insertion is on and sliced VBI is selected), for all
            other streams we're done */
         if (type == CX18_ENC_STREAM_TYPE_MPG &&
-                   cx->vbi.insert_mpeg && cx->vbi.sliced_in->service_set) {
+            cx->vbi.insert_mpeg && !cx18_raw_vbi(cx)) {
                 vbi_type = CX18_ENC_STREAM_TYPE_VBI;
         } else {
                 return 0;
@@ -258,7 +257,7 @@ static size_t cx18_copy_buf_to_user(struct cx18_stream *s,
         if (len > ucount)
                 len = ucount;
         if (cx->vbi.insert_mpeg && s->type == CX18_ENC_STREAM_TYPE_MPG &&
-            cx->vbi.sliced_in->service_set && buf != &cx->vbi.sliced_mpeg_buf) {
+            !cx18_raw_vbi(cx) && buf != &cx->vbi.sliced_mpeg_buf) {
                 const char *start = buf->buf + buf->readpos;
                 const char *p = start + 1;
                 const u8 *q;
@@ -333,8 +332,7 @@ static ssize_t cx18_read(struct cx18_stream *s, char __user *ubuf,
         /* Each VBI buffer is one frame, the v4l2 API says that for VBI the
            frames should arrive one-by-one, so make sure we never output more
            than one VBI frame at a time */
-        if (s->type == CX18_ENC_STREAM_TYPE_VBI &&
-            cx->vbi.sliced_in->service_set)
+        if (s->type == CX18_ENC_STREAM_TYPE_VBI && !cx18_raw_vbi(cx))
                 single_frame = 1;
 
         for (;;) {
diff --git a/drivers/media/video/cx18/cx18-ioctl.c b/drivers/media/video/cx18/cx18-ioctl.c
index ece799ec37a..e6087486f88 100644
--- a/drivers/media/video/cx18/cx18-ioctl.c
+++ b/drivers/media/video/cx18/cx18-ioctl.c
@@ -238,13 +238,12 @@ static int cx18_s_fmt_vbi_cap(struct file *file, void *fh,
         if (ret)
                 return ret;
 
-        if (id->type == CX18_ENC_STREAM_TYPE_VBI &&
-                        cx->vbi.sliced_in->service_set &&
-                        atomic_read(&cx->ana_capturing) > 0)
+        if (!cx18_raw_vbi(cx) && atomic_read(&cx->ana_capturing) > 0)
                 return -EBUSY;
 
         cx->vbi.sliced_in->service_set = 0;
-        cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);
+        cx->vbi.in.type = V4L2_BUF_TYPE_VBI_CAPTURE;
+        cx18_av_cmd(cx, VIDIOC_S_FMT, fmt);
         return cx18_g_fmt_vbi_cap(file, fh, fmt);
 }
 
diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c
index 9ead4591b1d..c87cd5369a4 100644
--- a/drivers/media/video/cx18/cx18-streams.c
+++ b/drivers/media/video/cx18/cx18-streams.c
@@ -340,7 +340,7 @@ void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 static void cx18_vbi_setup(struct cx18_stream *s)
 {
         struct cx18 *cx = s->cx;
-        int raw = cx->vbi.sliced_in->service_set == 0;
+        int raw = cx18_raw_vbi(cx);
         u32 data[CX2341X_MBOX_MAX_DATA];
         int lines;
 
@@ -471,8 +471,8 @@ int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
                 captype = CAPTURE_CHANNEL_TYPE_PCM;
                 break;
         case CX18_ENC_STREAM_TYPE_VBI:
-                captype = cx->vbi.sliced_in->service_set ?
-                    CAPTURE_CHANNEL_TYPE_SLICED_VBI : CAPTURE_CHANNEL_TYPE_VBI;
+                captype = cx18_raw_vbi(cx) ?
+                     CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
                 cx->vbi.frame = 0;
                 cx->vbi.inserted_frame = 0;
                 memset(cx->vbi.sliced_mpeg_size,
diff --git a/drivers/media/video/cx18/cx18-vbi.c b/drivers/media/video/cx18/cx18-vbi.c
index 22e76ee3f44..03f0e81307f 100644
--- a/drivers/media/video/cx18/cx18-vbi.c
+++ b/drivers/media/video/cx18/cx18-vbi.c
@@ -160,7 +160,7 @@ void cx18_process_vbi_data(struct cx18 *cx, struct cx18_buffer *buf,
                 return;
 
         /* Raw VBI data */
-        if (cx->vbi.sliced_in->service_set == 0) {
+        if (cx18_raw_vbi(cx)) {
                 u8 type;
 
                 cx18_buf_swap(buf);