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authorKamil Debski <k.debski@samsung.com>2015-02-23 09:26:18 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-04-10 09:47:00 -0300
commite4af23d33193c4da52fa84b835374e975085f8fd (patch)
tree87b05ab569b2b2600ffe14e0536fce0dfb71e6f9 /drivers/media
parentf61bf13b6a07a93b9348e77808d369803f40b681 (diff)
downloadop-kernel-dev-e4af23d33193c4da52fa84b835374e975085f8fd.zip
op-kernel-dev-e4af23d33193c4da52fa84b835374e975085f8fd.tar.gz
[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>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/platform/coda/coda-common.c7
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 6f32e6d..329c2a4 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);
}
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