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_format {
24 	u32	mbus_code;
25 	u8	input_format;
26 	u8	input_yuv_seq;
27 	u8	input_yuv_seq_invert;
28 };
29 
30 struct sun6i_csi_bridge_source {
31 	struct v4l2_subdev		*subdev;
32 	struct v4l2_fwnode_endpoint	endpoint;
33 	bool				expected;
34 };
35 
36 struct sun6i_csi_bridge_async_subdev {
37 	struct v4l2_async_subdev	async_subdev;
38 	struct sun6i_csi_bridge_source	*source;
39 };
40 
41 struct sun6i_csi_bridge {
42 	struct v4l2_subdev		subdev;
43 	struct v4l2_async_notifier	notifier;
44 	struct media_pad		pads[2];
45 	struct v4l2_mbus_framefmt	mbus_format;
46 	struct mutex			lock; /* Mbus format lock. */
47 
48 	struct sun6i_csi_bridge_source	source_parallel;
49 	struct sun6i_csi_bridge_source	source_mipi_csi2;
50 };
51 
52 /* Helpers */
53 
54 void sun6i_csi_bridge_dimensions(struct sun6i_csi_device *csi_dev,
55 				 unsigned int *width, unsigned int *height);
56 void sun6i_csi_bridge_format(struct sun6i_csi_device *csi_dev,
57 			     u32 *mbus_code, u32 *field);
58 
59 /* Format */
60 
61 const struct sun6i_csi_bridge_format *
62 sun6i_csi_bridge_format_find(u32 mbus_code);
63 
64 /* Bridge */
65 
66 int sun6i_csi_bridge_setup(struct sun6i_csi_device *csi_dev);
67 void sun6i_csi_bridge_cleanup(struct sun6i_csi_device *csi_dev);
68 
69 #endif
70