2 * Copyright (C) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
14 * struct video_bridge_priv - uclass information for video bridges
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
20 struct video_bridge_priv {
21 struct gpio_desc sleep;
22 struct gpio_desc reset;
23 struct gpio_desc hotplug;
27 * Operations for video bridges
29 struct video_bridge_ops {
31 * attach() - attach a video bridge
33 * @return 0 if OK, -ve on error
35 int (*attach)(struct udevice *dev);
38 * check_attached() - check if a bridge is correctly attached
40 * This method is optional - if not provided then the hotplug GPIO
41 * will be checked instead.
43 * @dev: Device to check
44 * @return 0 if attached, -EENOTCONN if not, or other -ve error
46 int (*check_attached)(struct udevice *dev);
49 * set_backlight() - Set the backlight brightness
51 * @dev: device to adjust
52 * @percent: brightness percentage (0=off, 100=full brightness)
53 * @return 0 if OK, -ve on error
55 int (*set_backlight)(struct udevice *dev, int percent);
58 * read_edid() - Read information from EDID
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
65 int (*read_edid)(struct udevice *dev, u8 *buf, int buf_size);
68 #define video_bridge_get_ops(dev) \
69 ((struct video_bridge_ops *)(dev)->driver->ops)
72 * video_bridge_attach() - attach a video bridge
74 * @return 0 if OK, -ve on error
76 int video_bridge_attach(struct udevice *dev);
79 * video_bridge_set_backlight() - Set the backlight brightness
81 * @percent: brightness percentage (0=off, 100=full brightness)
82 * @return 0 if OK, -ve on error
84 int video_bridge_set_backlight(struct udevice *dev, int percent);
87 * video_bridge_set_active() - take the bridge in/out of reset/powerdown
89 * @dev: Device to adjust
90 * @active: true to power up and reset, false to power down
92 int video_bridge_set_active(struct udevice *dev, bool active);
95 * check_attached() - check if a bridge is correctly attached
97 * @dev: Device to check
98 * @return 0 if attached, -EENOTCONN if not, or other -ve error
100 int video_bridge_check_attached(struct udevice *dev);
103 * video_bridge_read_edid() - Read information from EDID
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
110 int video_bridge_read_edid(struct udevice *dev, u8 *buf, int buf_size);