1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2014 Google Inc.
4 */
5
6 #define LOG_CATEGORY UCLASS_DISPLAY
7
8 #include <common.h>
9 #include <dm.h>
10 #include <display.h>
11 #include <edid.h>
12 #include <errno.h>
13
display_read_edid(struct udevice * dev,u8 * buf,int buf_size)14 int display_read_edid(struct udevice *dev, u8 *buf, int buf_size)
15 {
16 struct dm_display_ops *ops = display_get_ops(dev);
17
18 if (!ops || !ops->read_edid)
19 return -ENOSYS;
20 return ops->read_edid(dev, buf, buf_size);
21 }
22
display_enable(struct udevice * dev,int panel_bpp,const struct display_timing * timing)23 int display_enable(struct udevice *dev, int panel_bpp,
24 const struct display_timing *timing)
25 {
26 struct dm_display_ops *ops = display_get_ops(dev);
27 struct display_plat *disp_uc_plat;
28 int ret;
29
30 if (!ops || !ops->enable)
31 return -ENOSYS;
32 ret = ops->enable(dev, panel_bpp, timing);
33 if (ret)
34 return ret;
35
36 disp_uc_plat = dev_get_uclass_plat(dev);
37 disp_uc_plat->in_use = true;
38
39 return 0;
40 }
41
display_mode_valid(void * priv,const struct display_timing * timing)42 static bool display_mode_valid(void *priv, const struct display_timing *timing)
43 {
44 struct udevice *dev = priv;
45 struct dm_display_ops *ops = display_get_ops(dev);
46
47 if (ops && ops->mode_valid)
48 return ops->mode_valid(dev, timing);
49
50 return true;
51 }
52
display_read_timing(struct udevice * dev,struct display_timing * timing)53 int display_read_timing(struct udevice *dev, struct display_timing *timing)
54 {
55 struct dm_display_ops *ops = display_get_ops(dev);
56 int panel_bits_per_colour;
57 u8 buf[EDID_EXT_SIZE];
58 int ret;
59
60 if (ops && ops->read_timing)
61 return ops->read_timing(dev, timing);
62
63 if (!ops || !ops->read_edid)
64 return -ENOSYS;
65 ret = ops->read_edid(dev, buf, sizeof(buf));
66 if (ret < 0)
67 return ret;
68
69 return edid_get_timing_validate(buf, ret, timing,
70 &panel_bits_per_colour,
71 display_mode_valid, dev);
72 }
73
display_in_use(struct udevice * dev)74 bool display_in_use(struct udevice *dev)
75 {
76 struct display_plat *disp_uc_plat = dev_get_uclass_plat(dev);
77
78 return disp_uc_plat->in_use;
79 }
80
81 UCLASS_DRIVER(display) = {
82 .id = UCLASS_DISPLAY,
83 .name = "display",
84 .per_device_plat_auto = sizeof(struct display_plat),
85 };
86