| Simon Glass | 7cf1757 | 2015-07-02 18:16:08 -0600 | [diff] [blame] | 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); |
| Vasily Khoruzhick | 82e9a5a | 2017-09-20 23:29:07 -0700 | [diff] [blame] | 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); |
| Simon Glass | 7cf1757 | 2015-07-02 18:16:08 -0600 | [diff] [blame] | 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 | |
| Vasily Khoruzhick | 82e9a5a | 2017-09-20 23:29:07 -0700 | [diff] [blame] | 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 | |
| Simon Glass | 7cf1757 | 2015-07-02 18:16:08 -0600 | [diff] [blame] | 112 | #endif |