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1b68283b64
Mark a display as in use when display_enable() is called. This can avoid a display being used by multiple video-output devices. Signed-off-by: Simon Glass <sjg@chromium.org>
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/*
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* Copyright 2014 Google Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _DISPLAY_H
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#define _DISPLAY_H
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struct udevice;
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struct display_timing;
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/**
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* Display uclass platform data for each device
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*
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* @source_id: ID for the source of the display data, typically a video
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* controller
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* @src_dev: Source device providing the video
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* @in_use: Display is being used
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*/
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struct display_plat {
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int source_id;
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struct udevice *src_dev;
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bool in_use;
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};
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/**
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* display_read_timing() - Read timing information
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*
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* @dev: Device to read from
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* @return 0 if OK, -ve on error
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*/
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int display_read_timing(struct udevice *dev, struct display_timing *timing);
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/**
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* display_port_enable() - Enable a display port device
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*
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* @dev: Device to enable
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* @panel_bpp: Number of bits per pixel for panel
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* @timing: Display timings
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* @return 0 if OK, -ve on error
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*/
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int display_enable(struct udevice *dev, int panel_bpp,
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const struct display_timing *timing);
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/**
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* display_in_use() - Check if a display is in use by any device
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*
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* @return true if the device is in use (display_enable() has been called
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* successfully), else false
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*/
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bool display_in_use(struct udevice *dev);
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struct dm_display_ops {
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/**
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* read_timing() - Read information directly
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*
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* @dev: Device to read from
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* @timing: Display timings
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* @return 0 if OK, -ve on error
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*/
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int (*read_timing)(struct udevice *dev, struct display_timing *timing);
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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 (should be EDID_SIZE bytes)
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* @buf_size: Buffer size (should be EDID_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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* enable() - Enable the display port device
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*
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* @dev: Device to enable
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* @panel_bpp: Number of bits per pixel for panel
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* @timing: Display timings
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* @return 0 if OK, -ve on error
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*/
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int (*enable)(struct udevice *dev, int panel_bpp,
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const struct display_timing *timing);
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};
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#define display_get_ops(dev) ((struct dm_display_ops *)(dev)->driver->ops)
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#endif
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