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
165
|
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef __VIDEO_BRIDGE
#define __VIDEO_BRIDGE
#include <asm/gpio.h>
/**
* struct video_bridge_priv - uclass information for video bridges
*
* @sleep: GPIO to assert to power down the bridge
* @reset: GPIO to assert to reset the bridge
* @hotplug: Optional GPIO to check if bridge is connected
*/
struct video_bridge_priv {
struct gpio_desc sleep;
struct gpio_desc reset;
struct gpio_desc hotplug;
};
/**
* Operations for video bridges
*/
struct video_bridge_ops {
/**
* attach() - attach a video bridge
*
* @return 0 if OK, -ve on error
*/
int (*attach)(struct udevice *dev);
/**
* check_attached() - check if a bridge is correctly attached
*
* This method is optional - if not provided then the hotplug GPIO
* will be checked instead.
*
* @dev: Device to check
* @return 0 if attached, -EENOTCONN if not, or other -ve error
*/
int (*check_attached)(struct udevice *dev);
/**
* set_backlight() - Set the backlight brightness
*
* @dev: device to adjust
* @percent: brightness percentage (0=off, 100=full brightness)
* @return 0 if OK, -ve on error
*/
int (*set_backlight)(struct udevice *dev, int percent);
/**
* get_display_timing() - Get display timings from bridge.
*
* @dev: Bridge device containing the linked display timings
* @tim: Place to put timings
* @return 0 if OK, -ve on error
*
* This call it totally optional and useful mainly for integrated
* bridges with fixed output device.
*/
int (*get_display_timing)(struct udevice *dev,
struct display_timing *timing);
/**
* read_edid() - Read information from EDID
*
* @dev: Device to read from
* @buf: Buffer to read into
* @buf_size: Buffer size
* @return number of bytes read, <=0 for error
*/
int (*read_edid)(struct udevice *dev, u8 *buf, int buf_size);
};
#define video_bridge_get_ops(dev) \
((struct video_bridge_ops *)(dev)->driver->ops)
#if CONFIG_IS_ENABLED(VIDEO_BRIDGE)
/**
* video_bridge_attach() - attach a video bridge
*
* Return: 0 if OK, -ve on error
*/
int video_bridge_attach(struct udevice *dev);
/**
* video_bridge_set_backlight() - Set the backlight brightness
*
* @percent: brightness percentage (0=off, 100=full brightness)
* Return: 0 if OK, -ve on error
*/
int video_bridge_set_backlight(struct udevice *dev, int percent);
/**
* video_bridge_set_active() - take the bridge in/out of reset/powerdown
*
* @dev: Device to adjust
* @active: true to power up and reset, false to power down
*/
int video_bridge_set_active(struct udevice *dev, bool active);
/**
* check_attached() - check if a bridge is correctly attached
*
* @dev: Device to check
* Return: 0 if attached, -EENOTCONN if not, or other -ve error
*/
int video_bridge_check_attached(struct udevice *dev);
/**
* video_bridge_get_display_timing() - Get display timings from bridge.
*
* @dev: Bridge device containing the linked display timings
* Return: 0 if OK, -ve on error
*/
int video_bridge_get_display_timing(struct udevice *dev,
struct display_timing *timing);
/**
* video_bridge_read_edid() - Read information from EDID
*
* @dev: Device to read from
* @buf: Buffer to read into
* @buf_size: Buffer size
* Return: number of bytes read, <=0 for error
*/
int video_bridge_read_edid(struct udevice *dev, u8 *buf, int buf_size);
#else
static inline int video_bridge_attach(struct udevice *dev)
{
return -ENOSYS;
}
static inline int video_bridge_set_backlight(struct udevice *dev, int percent)
{
return -ENOSYS;
}
static inline int video_bridge_set_active(struct udevice *dev, bool active)
{
return -ENOSYS;
}
static inline int video_bridge_check_attached(struct udevice *dev)
{
return -ENOSYS;
}
static inline int video_bridge_get_display_timing(struct udevice *dev,
struct display_timing *timing)
{
return -ENOSYS;
}
static inline int video_bridge_read_edid(struct udevice *dev, u8 *buf, int buf_size)
{
return -ENOSYS;
}
#endif /* CONFIG_VIDEO_BRIDGE */
#endif
|
