1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2016 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <backlight.h>
#include <dm.h>
#include <edid.h>
#include <i2c.h>
#include <log.h>
#include <mipi_dsi.h>
#include <panel.h>
#include <asm/gpio.h>
#include <power/regulator.h>
#define EDID_I2C_ADDR 0x50
struct simple_panel_priv {
struct udevice *reg;
struct udevice *backlight;
struct gpio_desc enable;
};
static int simple_panel_enable_backlight(struct udevice *dev)
{
struct simple_panel_priv *priv = dev_get_priv(dev);
int ret;
debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name);
dm_gpio_set_value(&priv->enable, 1);
ret = backlight_enable(priv->backlight);
debug("%s: done, ret = %d\n", __func__, ret);
if (ret)
return ret;
return 0;
}
static int simple_panel_set_backlight(struct udevice *dev, int percent)
{
struct simple_panel_priv *priv = dev_get_priv(dev);
int ret;
debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name);
dm_gpio_set_value(&priv->enable, 1);
ret = backlight_set_brightness(priv->backlight, percent);
debug("%s: done, ret = %d\n", __func__, ret);
if (ret)
return ret;
return 0;
}
#if CONFIG_IS_ENABLED(I2C_EDID) && CONFIG_IS_ENABLED(DM_I2C)
static int simple_panel_get_edid_timing(struct udevice *dev,
struct display_timing *timings)
{
struct udevice *panel_ddc, *panel_edid;
struct display_timing edid_timing;
u8 edid_buf[EDID_SIZE] = { 0 };
int ret, bpc;
/* Check for DDC i2c if no timings are provided */
ret = uclass_get_device_by_phandle(UCLASS_I2C, dev,
"ddc-i2c-bus",
&panel_ddc);
if (ret) {
log_debug("%s: cannot get DDC i2c bus: error %d\n",
__func__, ret);
return ret;
}
ret = dm_i2c_probe(panel_ddc, EDID_I2C_ADDR, 0, &panel_edid);
if (ret) {
log_debug("%s: cannot probe EDID: error %d\n",
__func__, ret);
return ret;
}
ret = dm_i2c_read(panel_edid, 0, edid_buf, sizeof(edid_buf));
if (ret) {
log_debug("%s: cannot dump EDID buffer: error %d\n",
__func__, ret);
return ret;
}
ret = edid_get_timing(edid_buf, sizeof(edid_buf),
&edid_timing, &bpc);
if (ret) {
log_debug("%s: cannot decode EDID info: error %d\n",
__func__, ret);
return ret;
}
memcpy(timings, &edid_timing, sizeof(*timings));
return 0;
}
#else
static int simple_panel_get_edid_timing(struct udevice *dev,
struct display_timing *timings)
{
return -ENOTSUPP;
}
#endif
static int simple_panel_get_display_timing(struct udevice *dev,
struct display_timing *timings)
{
const void *blob = gd->fdt_blob;
int ret;
/* Check for timing subnode if panel node first */
ret = fdtdec_decode_display_timing(blob, dev_of_offset(dev),
0, timings);
if (!ret)
return ret;
return simple_panel_get_edid_timing(dev, timings);
}
static int simple_panel_of_to_plat(struct udevice *dev)
{
struct simple_panel_priv *priv = dev_get_priv(dev);
int ret;
if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
"power-supply", &priv->reg);
if (ret) {
debug("%s: Warning: cannot get power supply: ret=%d\n",
__func__, ret);
if (ret != -ENOENT)
return ret;
}
}
ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
"backlight", &priv->backlight);
if (ret) {
debug("%s: Cannot get backlight: ret=%d\n", __func__, ret);
if (ret != -ENOENT)
return log_ret(ret);
}
ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable,
GPIOD_IS_OUT);
if (ret) {
debug("%s: Warning: cannot get enable GPIO: ret=%d\n",
__func__, ret);
if (ret != -ENOENT)
return log_ret(ret);
}
return 0;
}
static int simple_panel_probe(struct udevice *dev)
{
struct simple_panel_priv *priv = dev_get_priv(dev);
struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
struct mipi_dsi_panel_plat *dsi_data =
(struct mipi_dsi_panel_plat *)dev_get_driver_data(dev);
int ret;
ret = regulator_set_enable_if_allowed(priv->reg, true);
if (ret && ret != -ENOSYS) {
debug("%s: failed to enable regulator '%s' %d\n",
__func__, priv->reg->name, ret);
return ret;
}
if (dsi_data)
memcpy(plat, dsi_data, sizeof(struct mipi_dsi_panel_plat));
return 0;
}
static const struct panel_ops simple_panel_ops = {
.enable_backlight = simple_panel_enable_backlight,
.set_backlight = simple_panel_set_backlight,
.get_display_timing = simple_panel_get_display_timing,
};
static const struct mipi_dsi_panel_plat panasonic_vvx10f004b00 = {
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
MIPI_DSI_CLOCK_NON_CONTINUOUS,
.format = MIPI_DSI_FMT_RGB888,
.lanes = 4,
};
static const struct udevice_id simple_panel_ids[] = {
{ .compatible = "simple-panel" },
{ .compatible = "auo,b133xtn01" },
{ .compatible = "auo,b116xw03" },
{ .compatible = "auo,b133htn01" },
{ .compatible = "boe,nv140fhmn49" },
{ .compatible = "lg,lb070wv8" },
{ .compatible = "sharp,lq123p1jx31" },
{ .compatible = "boe,nv101wxmn51" },
{ .compatible = "panasonic,vvx10f004b00",
.data = (ulong)&panasonic_vvx10f004b00 },
{ }
};
U_BOOT_DRIVER(simple_panel) = {
.name = "simple_panel",
.id = UCLASS_PANEL,
.of_match = simple_panel_ids,
.ops = &simple_panel_ops,
.of_to_plat = simple_panel_of_to_plat,
.probe = simple_panel_probe,
.priv_auto = sizeof(struct simple_panel_priv),
.plat_auto = sizeof(struct mipi_dsi_panel_plat),
};
|
