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media: vb2: keep track of timestamp status

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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to is no longer valid.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cleared when it is no longer valid.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
include/media/videobuf2-core.h
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@@ -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;