[media] coda: add context ops

Add a struct coda_context_ops that encapsulates context specific operations.
This will simplify adding JPEG support in the future and helps to avoid
exporting all functions individually when they move out of the main code
file.

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>

drivers/media/platform/coda/coda.h

@@ -164,6 +164,18 @@ struct gdi_tiled_map {
 #define GDI_LINEAR_FRAME_MAP 0
 };
 
+struct coda_ctx;
+
+struct coda_context_ops {
+	int (*queue_init)(void *priv, struct vb2_queue *src_vq,
+			  struct vb2_queue *dst_vq);
+	int (*start_streaming)(struct coda_ctx *ctx);
+	int (*prepare_run)(struct coda_ctx *ctx);
+	void (*finish_run)(struct coda_ctx *ctx);
+	void (*seq_end_work)(struct work_struct *work);
+	void (*release)(struct coda_ctx *ctx);
+};
+
 struct coda_ctx {
 	struct coda_dev			*dev;
 	struct mutex			buffer_mutex;
@@ -171,6 +183,7 @@ struct coda_ctx {
 	struct work_struct		pic_run_work;
 	struct work_struct		seq_end_work;
 	struct completion		completion;
+	const struct coda_context_ops	*ops;
 	int				aborting;
 	int				initialized;
 	int				streamon_out;