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801ab9e9 SG |
1 | /* |
2 | * Copyright (C) 2015 Google, Inc | |
3 | * Written by Simon Glass <sjg@chromium.org> | |
4 | * | |
5 | * SPDX-License-Identifier: GPL-2.0+ | |
6 | */ | |
7 | ||
8 | #ifndef __VIDEO_BRIDGE | |
9 | #define __VIDEO_BRIDGE | |
10 | ||
11 | #include <asm/gpio.h> | |
12 | ||
13 | /** | |
14 | * struct video_bridge_priv - uclass information for video bridges | |
15 | * | |
16 | * @sleep: GPIO to assert to power down the bridge | |
17 | * @reset: GPIO to assert to reset the bridge | |
18 | * @hotplug: Optional GPIO to check if bridge is connected | |
19 | */ | |
20 | struct video_bridge_priv { | |
21 | struct gpio_desc sleep; | |
22 | struct gpio_desc reset; | |
23 | struct gpio_desc hotplug; | |
24 | }; | |
25 | ||
26 | /** | |
27 | * Operations for video bridges | |
28 | */ | |
29 | struct video_bridge_ops { | |
30 | /** | |
31 | * attach() - attach a video bridge | |
32 | * | |
33 | * @return 0 if OK, -ve on error | |
34 | */ | |
35 | int (*attach)(struct udevice *dev); | |
36 | ||
37 | /** | |
38 | * check_attached() - check if a bridge is correctly attached | |
39 | * | |
40 | * This method is optional - if not provided then the hotplug GPIO | |
41 | * will be checked instead. | |
42 | * | |
43 | * @dev: Device to check | |
44 | * @return 0 if attached, -EENOTCONN if not, or other -ve error | |
45 | */ | |
46 | int (*check_attached)(struct udevice *dev); | |
47 | ||
48 | /** | |
49 | * set_backlight() - Set the backlight brightness | |
50 | * | |
51 | * @dev: device to adjust | |
52 | * @percent: brightness percentage (0=off, 100=full brightness) | |
53 | * @return 0 if OK, -ve on error | |
54 | */ | |
55 | int (*set_backlight)(struct udevice *dev, int percent); | |
fdb55255 VK |
56 | |
57 | /** | |
58 | * read_edid() - Read information from EDID | |
59 | * | |
60 | * @dev: Device to read from | |
61 | * @buf: Buffer to read into | |
62 | * @buf_size: Buffer size | |
63 | * @return number of bytes read, <=0 for error | |
64 | */ | |
65 | int (*read_edid)(struct udevice *dev, u8 *buf, int buf_size); | |
801ab9e9 SG |
66 | }; |
67 | ||
68 | #define video_bridge_get_ops(dev) \ | |
69 | ((struct video_bridge_ops *)(dev)->driver->ops) | |
70 | ||
71 | /** | |
72 | * video_bridge_attach() - attach a video bridge | |
73 | * | |
74 | * @return 0 if OK, -ve on error | |
75 | */ | |
76 | int video_bridge_attach(struct udevice *dev); | |
77 | ||
78 | /** | |
79 | * video_bridge_set_backlight() - Set the backlight brightness | |
80 | * | |
81 | * @percent: brightness percentage (0=off, 100=full brightness) | |
82 | * @return 0 if OK, -ve on error | |
83 | */ | |
84 | int video_bridge_set_backlight(struct udevice *dev, int percent); | |
85 | ||
86 | /** | |
87 | * video_bridge_set_active() - take the bridge in/out of reset/powerdown | |
88 | * | |
89 | * @dev: Device to adjust | |
90 | * @active: true to power up and reset, false to power down | |
91 | */ | |
92 | int video_bridge_set_active(struct udevice *dev, bool active); | |
93 | ||
94 | /** | |
95 | * check_attached() - check if a bridge is correctly attached | |
96 | * | |
97 | * @dev: Device to check | |
98 | * @return 0 if attached, -EENOTCONN if not, or other -ve error | |
99 | */ | |
100 | int video_bridge_check_attached(struct udevice *dev); | |
101 | ||
fdb55255 VK |
102 | /** |
103 | * video_bridge_read_edid() - Read information from EDID | |
104 | * | |
105 | * @dev: Device to read from | |
106 | * @buf: Buffer to read into | |
107 | * @buf_size: Buffer size | |
108 | * @return number of bytes read, <=0 for error | |
109 | */ | |
110 | int video_bridge_read_edid(struct udevice *dev, u8 *buf, int buf_size); | |
111 | ||
801ab9e9 | 112 | #endif |