media: coda: only wake up capture queue if no pending buffers to encode

If there are no pending queued output buffers to be encoded, waking up
the capture queue with -EPIPE signals end of stream. If there are
pending buffers on the other hand, setting the V4L2_BUF_FLAG_LAST on
the resulting encoded capture buffers is all that is needed.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/coda/coda-common.c

@@ -1035,9 +1035,9 @@ static int coda_encoder_cmd(struct file *file, void *fh,
 		return ret;
 
 	buf = v4l2_m2m_last_src_buf(ctx->fh.m2m_ctx);
-	if (buf)
+	if (buf) {
 		buf->flags |= V4L2_BUF_FLAG_LAST;
-
+	} else {
 		/* Set the stream-end flag on this context */
 		ctx->bit_stream_param |= CODA_BIT_STREAM_END_FLAG;
 
@@ -1046,6 +1046,7 @@ static int coda_encoder_cmd(struct file *file, void *fh,
 		/* If there is no buffer in flight, wake up */
 		if (!ctx->streamon_out || ctx->qsequence == ctx->osequence)
 			coda_wake_up_capture_queue(ctx);
+	}
 
 	return 0;
 }