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authorKamil Debski <k.debski@samsung.com>2015-02-23 09:26:19 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-04-10 09:47:15 -0300
commite6c9dec3e7d68c477768e2955c7f8ed78a09bfd6 (patch)
tree7aa2636a2720968b5b88d11810c7a03eb1ff955b /drivers/media
parente4af23d33193c4da52fa84b835374e975085f8fd (diff)
downloadop-kernel-dev-e6c9dec3e7d68c477768e2955c7f8ed78a09bfd6.zip
op-kernel-dev-e6c9dec3e7d68c477768e2955c7f8ed78a09bfd6.tar.gz
[media] s5p-mfc: set allow_zero_bytesused flag for vb2_queue_init
The s5p-mfc 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/s5p-mfc/s5p_mfc.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index 8e44a59..9fe4d90 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -843,6 +843,13 @@ static int s5p_mfc_open(struct file *file)
ret = -ENOENT;
goto err_queue_init;
}
+ /* One way to indicate end-of-stream for MFC 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.
+ */
+ q->allow_zero_bytesused = 1;
q->mem_ops = &vb2_dma_contig_memops;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
ret = vb2_queue_init(q);
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