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media: vb2: keep track of timestamp status 

If a stream is stopped, or if a USERPTR/DMABUF buffer is queued
backed by a different user address or dmabuf fd, then the timestamp
should be skipped by vb2_find_timestamp since the memory it refers
to is no longer valid.

So keep track of a 'copied_timestamp' state: it is set when the
timestamp is copied from an output to a capture buffer, and is
cleared when it is no longer valid.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Hans Verkuil 2019-02-04 05:11:33 -05:00 committed by Mauro Carvalho Chehab
parent cfc7740835
commit 7e4e716244
4 changed files with 9 additions and 1 deletions
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3
drivers/media/common/videobuf2/videobuf2-core.c
View File

@ -1041,6 +1041,7 @@ static int __prepare_userptr(struct vb2_buffer *vb)
if (vb->planes[plane].mem_priv) {
if (!reacquired) {
reacquired = true;
vb->copied_timestamp = 0;
call_void_vb_qop(vb, buf_cleanup, vb);
}
call_void_memop(vb, put_userptr, vb->planes[plane].mem_priv);
@ -1165,6 +1166,7 @@ static int __prepare_dmabuf(struct vb2_buffer *vb)
if (!reacquired) {
reacquired = true;
vb->copied_timestamp = 0;
call_void_vb_qop(vb, buf_cleanup, vb);
}
@ -1942,6 +1944,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q)
if (vb->request)
media_request_put(vb->request);
vb->request = NULL;
vb->copied_timestamp = 0;
}
}

3
drivers/media/common/videobuf2/videobuf2-v4l2.c
View File

@ -604,7 +604,8 @@ int vb2_find_timestamp(const struct vb2_queue *q, u64 timestamp,
unsigned int i;
for (i = start_idx; i < q->num_buffers; i++)
if (q->bufs[i]->timestamp == timestamp)
if (q->bufs[i]->copied_timestamp &&
q->bufs[i]->timestamp == timestamp)
return i;
return -1;
}

1
drivers/media/v4l2-core/v4l2-mem2mem.c
View File

@ -992,6 +992,7 @@ void v4l2_m2m_buf_copy_metadata(const struct vb2_v4l2_buffer *out_vb,
cap_vb->field = out_vb->field;
cap_vb->flags &= ~mask;
cap_vb->flags |= out_vb->flags & mask;
cap_vb->vb2_buf.copied_timestamp = 1;
}
EXPORT_SYMBOL_GPL(v4l2_m2m_buf_copy_metadata);

3
include/media/videobuf2-core.h
View File

@ -262,6 +262,8 @@ struct vb2_buffer {
* prepared: this buffer has been prepared, i.e. the
* buf_prepare op was called. It is cleared again
* after the 'buf_finish' op is called.
* copied_timestamp: the timestamp of this capture buffer was copied
* from an output buffer.
* queued_entry: entry on the queued buffers list, which holds
* all buffers queued from userspace
* done_entry: entry on the list that stores all buffers ready
@ -271,6 +273,7 @@ struct vb2_buffer {
enum vb2_buffer_state state;
unsigned int synced:1;
unsigned int prepared:1;
unsigned int copied_timestamp:1;
struct vb2_plane planes[VB2_MAX_PLANES];
struct list_head queued_entry;