[PATCH v2 04/12] staging: media: rkvdec: Block start streaming until both queues run

[Sebastian Fricke]

Ensure that both the CAPTURE and the OUTPUT queue are running (e.g. busy
-> have buffers allocated) before starting the actual streaming process.

Signed-off-by: Sebastian Fricke <sebastian.fricke at collabora.com>
---
 drivers/staging/media/rkvdec/rkvdec.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c
index c849f6c20279..e0e95d06e216 100644
--- a/drivers/staging/media/rkvdec/rkvdec.c
+++ b/drivers/staging/media/rkvdec/rkvdec.c
@@ -562,6 +562,13 @@ static int rkvdec_start_streaming(struct vb2_queue *q, unsigned int count)
 	if (V4L2_TYPE_IS_CAPTURE(q->type))
 		return 0;
 
+	/*
+	 * Make sure that both the output and the capture queue are running
+	 */
+	if (rkvdec_queue_busy(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) == 0 ||
+	    rkvdec_queue_busy(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) == 0)
+		return -EAGAIN;
+
 	desc = ctx->coded_fmt_desc;
 	if (WARN_ON(!desc))
 		return -EINVAL;

-- 
2.25.1