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| author | Kamil Debski <k.debski@samsung.com> | 2015-02-23 09:26:18 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-04-10 09:47:00 -0300 |
| commit | e4af23d33193c4da52fa84b835374e975085f8fd (patch) | |
| tree | 87b05ab569b2b2600ffe14e0536fce0dfb71e6f9 | |
| parent | f61bf13b6a07a93b9348e77808d369803f40b681 (diff) | |
| download | linux-e4af23d33193c4da52fa84b835374e975085f8fd.tar.bz2 | |
[media] coda: set allow_zero_bytesused flag for vb2_queue_init
The coda driver interprets a buffer with bytesused equal to 0 as a special
case indicating end-of-stream. After vb2: fix bytesused == 0 handling
(8a75ffb) patch videobuf2 modified the value of bytesused if it was 0.
The allow_zero_bytesused flag was added to videobuf2 to keep
backward compatibility.
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
| -rw-r--r-- | drivers/media/platform/coda/coda-common.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/media/platform/coda/coda-common.c b/drivers/media/platform/coda/coda-common.c index 6f32e6d6b156..329c2a4d86f6 100644 --- a/drivers/media/platform/coda/coda-common.c +++ b/drivers/media/platform/coda/coda-common.c @@ -1541,6 +1541,13 @@ static int coda_queue_init(struct coda_ctx *ctx, struct vb2_queue *vq) vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; vq->lock = &ctx->dev->dev_mutex; + /* One way to indicate end-of-stream for coda is to set the + * bytesused == 0. However by default videobuf2 handles bytesused + * equal to 0 as a special case and changes its value to the size + * of the buffer. Set the allow_zero_bytesused flag, so + * that videobuf2 will keep the value of bytesused intact. + */ + vq->allow_zero_bytesused = 1; return vb2_queue_init(vq); } |