aboutsummaryrefslogtreecommitdiffstats
path: root/include/drm/drm_mipi_dsi.h
blob: 7209df15a3cd1e1929989a180ff6aa5bf3ec86f1 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*
 * MIPI DSI Bus
 *
 * Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd.
 * Andrzej Hajda <a.hajda@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __DRM_MIPI_DSI_H__
#define __DRM_MIPI_DSI_H__

#include <linux/device.h>

struct mipi_dsi_host;
struct mipi_dsi_device;

/* request ACK from peripheral */
#define MIPI_DSI_MSG_REQ_ACK	BIT(0)
/* use Low Power Mode to transmit message */
#define MIPI_DSI_MSG_USE_LPM	BIT(1)

/**
 * struct mipi_dsi_msg - read/write DSI buffer
 * @channel: virtual channel id
 * @type: payload data type
 * @tx_len: length of @tx_buf
 * @tx_buf: data to be written
 * @rx_len: length of @rx_buf
 * @rx_buf: data to be read, or NULL
 */
struct mipi_dsi_msg {
	u8 channel;
	u8 type;
	u16 flags;

	size_t tx_len;
	const void *tx_buf;

	size_t rx_len;
	void *rx_buf;
};

/**
 * struct mipi_dsi_host_ops - DSI bus operations
 * @attach: attach DSI device to DSI host
 * @detach: detach DSI device from DSI host
 * @transfer: send and/or receive DSI packet, return number of received bytes,
 * 	      or error
 */
struct mipi_dsi_host_ops {
	int (*attach)(struct mipi_dsi_host *host,
		      struct mipi_dsi_device *dsi);
	int (*detach)(struct mipi_dsi_host *host,
		      struct mipi_dsi_device *dsi);
	ssize_t (*transfer)(struct mipi_dsi_host *host,
			    struct mipi_dsi_msg *msg);
};

/**
 * struct mipi_dsi_host - DSI host device
 * @dev: driver model device node for this DSI host
 * @ops: DSI host operations
 */
struct mipi_dsi_host {
	struct device *dev;
	const struct mipi_dsi_host_ops *ops;
};

int mipi_dsi_host_register(struct mipi_dsi_host *host);
void mipi_dsi_host_unregister(struct mipi_dsi_host *host);

/* DSI mode flags */

/* video mode */
#define MIPI_DSI_MODE_VIDEO		BIT(0)
/* video burst mode */
#define MIPI_DSI_MODE_VIDEO_BURST	BIT(1)
/* video pulse mode */
#define MIPI_DSI_MODE_VIDEO_SYNC_PULSE	BIT(2)
/* enable auto vertical count mode */
#define MIPI_DSI_MODE_VIDEO_AUTO_VERT	BIT(3)
/* enable hsync-end packets in vsync-pulse and v-porch area */
#define MIPI_DSI_MODE_VIDEO_HSE		BIT(4)
/* disable hfront-porch area */
#define MIPI_DSI_MODE_VIDEO_HFP		BIT(5)
/* disable hback-porch area */
#define MIPI_DSI_MODE_VIDEO_HBP		BIT(6)
/* disable hsync-active area */
#define MIPI_DSI_MODE_VIDEO_HSA		BIT(7)
/* flush display FIFO on vsync pulse */
#define MIPI_DSI_MODE_VSYNC_FLUSH	BIT(8)
/* disable EoT packets in HS mode */
#define MIPI_DSI_MODE_EOT_PACKET	BIT(9)

enum mipi_dsi_pixel_format {
	MIPI_DSI_FMT_RGB888,
	MIPI_DSI_FMT_RGB666,
	MIPI_DSI_FMT_RGB666_PACKED,
	MIPI_DSI_FMT_RGB565,
};

/**
 * struct mipi_dsi_device - DSI peripheral device
 * @host: DSI host for this peripheral
 * @dev: driver model device node for this peripheral
 * @channel: virtual channel assigned to the peripheral
 * @format: pixel format for video mode
 * @lanes: number of active data lanes
 * @mode_flags: DSI operation mode related flags
 */
struct mipi_dsi_device {
	struct mipi_dsi_host *host;
	struct device dev;

	unsigned int channel;
	unsigned int lanes;
	enum mipi_dsi_pixel_format format;
	unsigned long mode_flags;
};

#define to_mipi_dsi_device(d) container_of(d, struct mipi_dsi_device, dev)

int mipi_dsi_attach(struct mipi_dsi_device *dsi);
int mipi_dsi_detach(struct mipi_dsi_device *dsi);
int mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, unsigned int channel,
		       const void *data, size_t len);
ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, unsigned int channel,
			  u8 cmd, void *data, size_t len);

/**
 * struct mipi_dsi_driver - DSI driver
 * @driver: device driver model driver
 * @probe: callback for device binding
 * @remove: callback for device unbinding
 */
struct mipi_dsi_driver {
	struct device_driver driver;
	int(*probe)(struct mipi_dsi_device *dsi);
	int(*remove)(struct mipi_dsi_device *dsi);
};

#define to_mipi_dsi_driver(d) container_of(d, struct mipi_dsi_driver, driver)

static inline void *mipi_dsi_get_drvdata(const struct mipi_dsi_device *dsi)
{
	return dev_get_drvdata(&dsi->dev);
}

static inline void mipi_dsi_set_drvdata(struct mipi_dsi_device *dsi, void *data)
{
	dev_set_drvdata(&dsi->dev, data);
}

int mipi_dsi_driver_register(struct mipi_dsi_driver *driver);
void mipi_dsi_driver_unregister(struct mipi_dsi_driver *driver);

#define module_mipi_dsi_driver(__mipi_dsi_driver) \
	module_driver(__mipi_dsi_driver, mipi_dsi_driver_register, \
			mipi_dsi_driver_unregister)

#endif /* __DRM_MIPI_DSI__ */