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Subject[PATCH 5/8] media: cedrus: Detect first slice of a frame
Date
When codec supports multiple slices in one frame, VPU has to know when
first slice of each frame is being processed, presumably to correctly
clear/set data in auxiliary buffers.

Add first_slice field to cedrus_run structure and set it according to
timestamps of capture and output buffers. If timestamps are different,
it's first slice and viceversa.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
drivers/staging/media/sunxi/cedrus/cedrus.h | 1 +
drivers/staging/media/sunxi/cedrus/cedrus_dec.c | 2 ++
2 files changed, 3 insertions(+)

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.h b/drivers/staging/media/sunxi/cedrus/cedrus.h
index 2f017a651848..32cb38e541c6 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus.h
+++ b/drivers/staging/media/sunxi/cedrus/cedrus.h
@@ -70,6 +70,7 @@ struct cedrus_mpeg2_run {
struct cedrus_run {
struct vb2_v4l2_buffer *src;
struct vb2_v4l2_buffer *dst;
+ bool first_slice;

union {
struct cedrus_h264_run h264;
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
index 56ca4c9ad01c..d7b54accfe83 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
@@ -31,6 +31,8 @@ void cedrus_device_run(void *priv)

run.src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
run.dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
+ run.first_slice =
+ run.src->vb2_buf.timestamp != run.dst->vb2_buf.timestamp;

/* Apply request(s) controls if needed. */
src_req = run.src->vb2_buf.req_obj.req;
--
2.22.1
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