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