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Tom Rini83d290c2018-05-06 17:58:06 -04001/* SPDX-License-Identifier: GPL-2.0+ */
Simon Glass2dcf1432016-01-21 19:45:00 -07002/*
3 * Copyright 2014 Google Inc.
Simon Glass2dcf1432016-01-21 19:45:00 -07004 */
5
6#ifndef _DISPLAY_H
7#define _DISPLAY_H
8
9struct udevice;
10struct display_timing;
11
12/**
13 * Display uclass platform data for each device
14 *
15 * @source_id: ID for the source of the display data, typically a video
16 * controller
17 * @src_dev: Source device providing the video
Simon Glass1b682832016-11-13 14:22:07 -070018 * @in_use: Display is being used
Simon Glass2dcf1432016-01-21 19:45:00 -070019 */
20struct display_plat {
21 int source_id;
22 struct udevice *src_dev;
Simon Glass1b682832016-11-13 14:22:07 -070023 bool in_use;
Simon Glass2dcf1432016-01-21 19:45:00 -070024};
25
26/**
Jacob Cheneab314f2016-03-14 11:20:14 +080027 * display_read_timing() - Read timing information
Simon Glass2dcf1432016-01-21 19:45:00 -070028 *
29 * @dev: Device to read from
30 * @return 0 if OK, -ve on error
31 */
32int display_read_timing(struct udevice *dev, struct display_timing *timing);
33
34/**
35 * display_port_enable() - Enable a display port device
36 *
37 * @dev: Device to enable
38 * @panel_bpp: Number of bits per pixel for panel
39 * @timing: Display timings
40 * @return 0 if OK, -ve on error
41 */
42int display_enable(struct udevice *dev, int panel_bpp,
43 const struct display_timing *timing);
44
Simon Glass1b682832016-11-13 14:22:07 -070045/**
46 * display_in_use() - Check if a display is in use by any device
47 *
48 * @return true if the device is in use (display_enable() has been called
49 * successfully), else false
50 */
51bool display_in_use(struct udevice *dev);
52
Simon Glass2dcf1432016-01-21 19:45:00 -070053struct dm_display_ops {
54 /**
Jacob Cheneab314f2016-03-14 11:20:14 +080055 * read_timing() - Read information directly
56 *
57 * @dev: Device to read from
58 * @timing: Display timings
59 * @return 0 if OK, -ve on error
60 */
61 int (*read_timing)(struct udevice *dev, struct display_timing *timing);
62
63 /**
Simon Glass2dcf1432016-01-21 19:45:00 -070064 * read_edid() - Read information from EDID
65 *
66 * @dev: Device to read from
67 * @buf: Buffer to read into (should be EDID_SIZE bytes)
68 * @buf_size: Buffer size (should be EDID_SIZE)
69 * @return number of bytes read, <=0 for error
70 */
71 int (*read_edid)(struct udevice *dev, u8 *buf, int buf_size);
72
73 /**
74 * enable() - Enable the display port device
75 *
76 * @dev: Device to enable
77 * @panel_bpp: Number of bits per pixel for panel
78 * @timing: Display timings
79 * @return 0 if OK, -ve on error
80 */
81 int (*enable)(struct udevice *dev, int panel_bpp,
82 const struct display_timing *timing);
Neil Armstrongeb4ee4e2019-07-04 15:52:07 +020083
84 /**
85 * mode_valid() - Check if mode is supported
86 *
87 * @dev: Device to enable
88 * @timing: Display timings
89 * @return true if supported, false if not
90 */
91 bool (*mode_valid)(struct udevice *dev,
92 const struct display_timing *timing);
Simon Glass2dcf1432016-01-21 19:45:00 -070093};
94
95#define display_get_ops(dev) ((struct dm_display_ops *)(dev)->driver->ops)
96
97#endif