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); 56 }; 57 58 #define video_bridge_get_ops(dev) \ 59 ((struct video_bridge_ops *)(dev)->driver->ops) 60 61 /** 62 * video_bridge_attach() - attach a video bridge 63 * 64 * @return 0 if OK, -ve on error 65 */ 66 int video_bridge_attach(struct udevice *dev); 67 68 /** 69 * video_bridge_set_backlight() - Set the backlight brightness 70 * 71 * @percent: brightness percentage (0=off, 100=full brightness) 72 * @return 0 if OK, -ve on error 73 */ 74 int video_bridge_set_backlight(struct udevice *dev, int percent); 75 76 /** 77 * video_bridge_set_active() - take the bridge in/out of reset/powerdown 78 * 79 * @dev: Device to adjust 80 * @active: true to power up and reset, false to power down 81 */ 82 int video_bridge_set_active(struct udevice *dev, bool active); 83 84 /** 85 * check_attached() - check if a bridge is correctly attached 86 * 87 * @dev: Device to check 88 * @return 0 if attached, -EENOTCONN if not, or other -ve error 89 */ 90 int video_bridge_check_attached(struct udevice *dev); 91 92 #endif 93