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