V4L/DVB (13908): cx18: Add initial working VIDIOC_G_ENC_INDEX ioctl() support

VIDIOC_G_ENC_INDEX support see the light of day.
Some notes:
1. With default capture parameters, the CX23418 seems to transfer 192 index
entries (4.5 kB worth) at 10 second intervals.

2. Index streams don't seem to be supported for MPEG 2 TS streams

3. The index entries seem to claim every frame is a B-Frame.  Possible
firmware bug.

4. The cx18 driver does not try to capture an index stream when inserting
sliced VBI into the MPEg stream as the offsets would need fixup.

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

1 files changed, 0 insertions, 12 deletions

diff --git a/drivers/media/video/cx18/cx18-fileops.c b/drivers/media/video/cx18/cx18-fileops.c
index b1ad03f61019..d522d84906e1 100644
--- a/drivers/media/video/cx18/cx18-fileops.c
+++ b/drivers/media/video/cx18/cx18-fileops.c
@@ -392,18 +392,6 @@ static size_t cx18_copy_buf_to_user(struct cx18_stream *s,
         return len;
 }
 
-/**
- * list_entry_is_past_end - check if a previous loop cursor is off list end
- * @pos:        the type * previously used as a loop cursor.
- * @head:       the head for your list.
- * @member:     the name of the list_struct within the struct.
- *
- * Check if the entry's list_head is the head of the list, thus it's not a
- * real entry but was the loop cursor that walked past the end
- */
-#define list_entry_is_past_end(pos, head, member) \
-        (&pos->member == (head))
-
 static size_t cx18_copy_mdl_to_user(struct cx18_stream *s,
                 struct cx18_mdl *mdl, char __user *ubuf, size_t ucount)
 {