[media] coda: add sequence counter offset

The coda h.264 decoder also counts PIC_RUNs where no frame was decoded but
a frame was rotated out / marked as ready to be displayed. This causes an
offset between the incoming encoded frame's sequence number and the decode
sequence number returned by the coda. This patch introduces a sequence
counter offset variable to keep track of the difference.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c
index d4e7003..d20343b 100644 (file)
--- a/drivers/media/platform/coda.c
+++ b/drivers/media/platform/coda.c
@@ -222,6 +222,7 @@ struct coda_ctx {
        u32                             isequence;
        u32                             qsequence;
        u32                             osequence;
+       u32                             sequence_offset;
        struct coda_q_data              q_data[2];
        enum coda_inst_type             inst_type;
        struct coda_codec               *codec;
@@ -2621,6 +2622,7 @@ static void coda_stop_streaming(struct vb2_queue *q)
                ctx->streamon_cap = 0;
 
                ctx->osequence = 0;
+               ctx->sequence_offset = 0;
        }
 
        if (!ctx->streamon_out && !ctx->streamon_cap) {
@@ -3126,7 +3128,9 @@ static void coda_finish_decode(struct coda_ctx *ctx)
 
        if (decoded_idx == -1) {
                /* no frame was decoded, but we might have a display frame */
-               if (display_idx < 0 && ctx->display_idx < 0)
+               if (display_idx >= 0 && display_idx < ctx->num_internal_frames)
+                       ctx->sequence_offset++;
+               else if (ctx->display_idx < 0)
                        ctx->prescan_failed = true;
        } else if (decoded_idx == -2) {
                /* no frame was decoded, we still return the remaining buffers */
@@ -3138,10 +3142,11 @@ static void coda_finish_decode(struct coda_ctx *ctx)
                                      struct coda_timestamp, list);
                list_del(&ts->list);
                val = coda_read(dev, CODA_RET_DEC_PIC_FRAME_NUM) - 1;
-               if (val != ts->sequence) {
+               val -= ctx->sequence_offset;
+               if (val != (ts->sequence & 0xffff)) {
                        v4l2_err(&dev->v4l2_dev,
-                                "sequence number mismatch (%d != %d)\n",
-                                val, ts->sequence);
+                                "sequence number mismatch (%d(%d) != %d)\n",
+                                val, ctx->sequence_offset, ts->sequence);
                }
                ctx->frame_timestamps[decoded_idx] = *ts;
                kfree(ts);