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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2014 Google Inc.
4 */
5
6#define LOG_CATEGORY UCLASS_DISPLAY
7
8#include <dm.h>
9#include <display.h>
10#include <edid.h>
11#include <errno.h>
12
13int display_read_edid(struct udevice *dev, u8 *buf, int buf_size)
14{
15 struct dm_display_ops *ops = display_get_ops(dev);
16
17 if (!ops || !ops->read_edid)
18 return -ENOSYS;
19 return ops->read_edid(dev, buf, buf_size);
20}
21
22int display_enable(struct udevice *dev, int panel_bpp,
23 const struct display_timing *timing)
24{
25 struct dm_display_ops *ops = display_get_ops(dev);
26 struct display_plat *disp_uc_plat;
27 int ret;
28
29 if (!ops || !ops->enable)
30 return -ENOSYS;
31 ret = ops->enable(dev, panel_bpp, timing);
32 if (ret)
33 return ret;
34
35 disp_uc_plat = dev_get_uclass_plat(dev);
36 disp_uc_plat->in_use = true;
37
38 return 0;
39}
40
41static bool display_mode_valid(void *priv, const struct display_timing *timing)
42{
43 struct udevice *dev = priv;
44 struct dm_display_ops *ops = display_get_ops(dev);
45
46 if (ops && ops->mode_valid)
47 return ops->mode_valid(dev, timing);
48
49 return true;
50}
51
52int display_read_timing(struct udevice *dev, struct display_timing *timing)
53{
54 struct dm_display_ops *ops = display_get_ops(dev);
55 int panel_bits_per_colour;
56 u8 buf[EDID_EXT_SIZE];
57 int ret;
58
59 if (ops && ops->read_timing)
60 return ops->read_timing(dev, timing);
61
62 if (!ops || !ops->read_edid)
63 return -ENOSYS;
64 ret = ops->read_edid(dev, buf, sizeof(buf));
65 if (ret < 0)
66 return ret;
67
68 return edid_get_timing_validate(buf, ret, timing,
69 &panel_bits_per_colour,
70 display_mode_valid, dev);
71}
72
73bool display_in_use(struct udevice *dev)
74{
75 struct display_plat *disp_uc_plat = dev_get_uclass_plat(dev);
76
77 return disp_uc_plat->in_use;
78}
79
80UCLASS_DRIVER(display) = {
81 .id = UCLASS_DISPLAY,
82 .name = "display",
83 .per_device_plat_auto = sizeof(struct display_plat),
84};