drm/amd/display: Add function to copy DC streams

	return stream;

}

struct dc_stream_state *dc_copy_stream(const struct dc_stream_state *stream)

{

	struct dc_stream_state *new_stream;

	new_stream = kzalloc(sizeof(struct dc_stream_state), GFP_KERNEL);

	if (stream == NULL)

		return NULL;

	memcpy(new_stream, stream, sizeof(struct dc_stream_state));

	if (new_stream->sink)

		dc_sink_retain(new_stream->sink);

	if (new_stream->out_transfer_func)

		dc_transfer_func_retain(new_stream->out_transfer_func);

	kref_init(&new_stream->refcount);

	return new_stream;

}

/**

 * dc_stream_get_status_from_state - Get stream status from given dc state

 * @state: DC state to find the stream status in

 */

struct dc_stream_state *dc_create_stream_for_sink(struct dc_sink *dc_sink);

struct dc_stream_state *dc_copy_stream(const struct dc_stream_state *stream);

void update_stream_signal(struct dc_stream_state *stream, struct dc_sink *sink);

void dc_stream_retain(struct dc_stream_state *dc_stream);