1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright 2021-2022 Bootlin
4  * Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
5  */
6 
7 #ifndef _SUN6I_CSI_BRIDGE_H_
8 #define _SUN6I_CSI_BRIDGE_H_
9 
10 #include <media/v4l2-device.h>
11 #include <media/v4l2-fwnode.h>
12 
13 #define SUN6I_CSI_BRIDGE_NAME	"sun6i-csi-bridge"
14 
15 enum sun6i_csi_bridge_pad {
16 	SUN6I_CSI_BRIDGE_PAD_SINK	= 0,
17 	SUN6I_CSI_BRIDGE_PAD_SOURCE	= 1,
18 	SUN6I_CSI_BRIDGE_PAD_COUNT	= 2,
19 };
20 
21 struct sun6i_csi_device;
22 
23 struct sun6i_csi_bridge_source {
24 	struct v4l2_subdev		*subdev;
25 	struct v4l2_fwnode_endpoint	endpoint;
26 	bool				expected;
27 };
28 
29 struct sun6i_csi_bridge_async_subdev {
30 	struct v4l2_async_subdev	async_subdev;
31 	struct sun6i_csi_bridge_source	*source;
32 };
33 
34 struct sun6i_csi_bridge {
35 	struct v4l2_subdev		subdev;
36 	struct v4l2_async_notifier	notifier;
37 	struct media_pad		pads[2];
38 	struct v4l2_mbus_framefmt	mbus_format;
39 	struct mutex			lock; /* Mbus format lock. */
40 
41 	struct sun6i_csi_bridge_source	source_parallel;
42 };
43 
44 /* Helpers */
45 
46 void sun6i_csi_bridge_dimensions(struct sun6i_csi_device *csi_dev,
47 				 unsigned int *width, unsigned int *height);
48 void sun6i_csi_bridge_format(struct sun6i_csi_device *csi_dev,
49 			     u32 *mbus_code, u32 *field);
50 
51 /* Bridge */
52 
53 int sun6i_csi_bridge_setup(struct sun6i_csi_device *csi_dev);
54 void sun6i_csi_bridge_cleanup(struct sun6i_csi_device *csi_dev);
55 
56 #endif
57