mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef __VIDEO_BRIDGE
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#define __VIDEO_BRIDGE
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#include <asm/gpio.h>
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/**
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* struct video_bridge_priv - uclass information for video bridges
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*
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* @sleep: GPIO to assert to power down the bridge
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* @reset: GPIO to assert to reset the bridge
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* @hotplug: Optional GPIO to check if bridge is connected
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*/
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struct video_bridge_priv {
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struct gpio_desc sleep;
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struct gpio_desc reset;
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struct gpio_desc hotplug;
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};
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/**
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* Operations for video bridges
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*/
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struct video_bridge_ops {
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/**
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* attach() - attach a video bridge
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*
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* @return 0 if OK, -ve on error
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*/
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int (*attach)(struct udevice *dev);
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/**
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* check_attached() - check if a bridge is correctly attached
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*
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* This method is optional - if not provided then the hotplug GPIO
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* will be checked instead.
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*
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* @dev: Device to check
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* @return 0 if attached, -EENOTCONN if not, or other -ve error
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*/
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int (*check_attached)(struct udevice *dev);
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/**
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* set_backlight() - Set the backlight brightness
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*
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* @dev: device to adjust
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* @percent: brightness percentage (0=off, 100=full brightness)
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* @return 0 if OK, -ve on error
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*/
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int (*set_backlight)(struct udevice *dev, int percent);
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/**
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* read_edid() - Read information from EDID
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*
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* @dev: Device to read from
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* @buf: Buffer to read into
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* @buf_size: Buffer size
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* @return number of bytes read, <=0 for error
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*/
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int (*read_edid)(struct udevice *dev, u8 *buf, int buf_size);
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};
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#define video_bridge_get_ops(dev) \
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((struct video_bridge_ops *)(dev)->driver->ops)
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/**
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* video_bridge_attach() - attach a video bridge
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*
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* @return 0 if OK, -ve on error
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*/
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int video_bridge_attach(struct udevice *dev);
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/**
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* video_bridge_set_backlight() - Set the backlight brightness
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*
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* @percent: brightness percentage (0=off, 100=full brightness)
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* @return 0 if OK, -ve on error
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*/
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int video_bridge_set_backlight(struct udevice *dev, int percent);
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/**
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* video_bridge_set_active() - take the bridge in/out of reset/powerdown
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*
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* @dev: Device to adjust
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* @active: true to power up and reset, false to power down
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*/
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int video_bridge_set_active(struct udevice *dev, bool active);
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/**
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* check_attached() - check if a bridge is correctly attached
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*
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* @dev: Device to check
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* @return 0 if attached, -EENOTCONN if not, or other -ve error
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*/
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int video_bridge_check_attached(struct udevice *dev);
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/**
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* video_bridge_read_edid() - Read information from EDID
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*
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* @dev: Device to read from
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* @buf: Buffer to read into
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* @buf_size: Buffer size
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* @return number of bytes read, <=0 for error
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*/
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int video_bridge_read_edid(struct udevice *dev, u8 *buf, int buf_size);
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#endif
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