[media] coda: add support for contexts that do not use the BIT processor

In preparation for CODA9 JPEG support, allow contexts that
control hardware units directly, without the BIT processor.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

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

@@ -181,6 +181,7 @@ struct coda_video_device {
 	const char *name;
 	enum coda_inst_type type;
 	const struct coda_context_ops *ops;
+	bool direct;
 	u32 src_formats[CODA_MAX_FORMATS];
 	u32 dst_formats[CODA_MAX_FORMATS];
 };
@@ -953,7 +954,7 @@ static int coda_job_ready(void *m2m_priv)
 		return 0;
 	}
 
-	if (ctx->inst_type == CODA_INST_DECODER) {
+	if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit) {
 		struct list_head *meta;
 		bool stream_end;
 		int num_metas;
@@ -1161,7 +1162,7 @@ static void coda_buf_queue(struct vb2_buffer *vb)
 	 * In the decoder case, immediately try to copy the buffer into the
 	 * bitstream ringbuffer and mark it as ready to be dequeued.
 	 */
-	if (ctx->inst_type == CODA_INST_DECODER &&
+	if (ctx->use_bit && ctx->inst_type == CODA_INST_DECODER &&
 	    vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 		/*
 		 * For backwards compatibility, queuing an empty buffer marks
@@ -1262,7 +1263,7 @@ static int coda_start_streaming(struct vb2_queue *q, unsigned int count)
 		return 0;
 
 	/* Allow BIT decoder device_run with no new buffers queued */
-	if (ctx->inst_type == CODA_INST_DECODER)
+	if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit)
 		v4l2_m2m_set_src_buffered(ctx->fh.m2m_ctx, true);
 
 	ctx->gopcounter = ctx->params.gop_size - 1;
@@ -1626,6 +1627,7 @@ static int coda_open(struct file *file)
 	ctx->cvd = to_coda_video_device(vdev);
 	ctx->inst_type = ctx->cvd->type;
 	ctx->ops = ctx->cvd->ops;
+	ctx->use_bit = !ctx->cvd->direct;
 	init_completion(&ctx->completion);
 	INIT_WORK(&ctx->pic_run_work, coda_pic_run_work);
 	if (ctx->ops->seq_end_work)
@@ -1680,6 +1682,7 @@ static int coda_open(struct file *file)
 
 	ctx->fh.ctrl_handler = &ctx->ctrls;
 
+	if (ctx->use_bit) {
 		ret = coda_alloc_context_buf(ctx, &ctx->parabuf,
 					     CODA_PARA_BUF_SIZE, "parabuf");
 		if (ret < 0) {
@@ -1697,6 +1700,7 @@ static int coda_open(struct file *file)
 			ret = -ENOMEM;
 			goto err_dma_writecombine;
 		}
+	}
 	kfifo_init(&ctx->bitstream_fifo,
 		ctx->bitstream.vaddr, ctx->bitstream.size);
 	mutex_init(&ctx->bitstream_mutex);
@@ -1743,7 +1747,7 @@ static int coda_release(struct file *file)
 	v4l2_dbg(1, coda_debug, &dev->v4l2_dev, "Releasing instance %p\n",
 		 ctx);
 
-	if (ctx->inst_type == CODA_INST_DECODER)
+	if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit)
 		coda_bit_stream_end_flag(ctx);
 
 	/* If this instance is running, call .job_abort and wait for it to end */

drivers/media/platform/coda/coda.h

@@ -235,6 +235,7 @@ struct coda_ctx {
 	u32				frame_mem_ctrl;
 	int				display_idx;
 	struct dentry			*debugfs_entry;
+	bool				use_bit;
 };
 
 extern int coda_debug;