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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018-2019, Bridge Systems BV
* Copyright (C) 2018-2019, Bootlin
* Copyright (C) 2017, Free Electrons
*
* This file based on panel-ilitek-ili9881c.c
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <drm/drm_connector.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct rb070d30_panel {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct regulator *supply;
struct {
struct gpio_desc *power;
struct gpio_desc *reset;
struct gpio_desc *updn;
struct gpio_desc *shlr;
} gpios;
};
static inline struct rb070d30_panel *panel_to_rb070d30_panel(struct drm_panel *panel)
{
return container_of(panel, struct rb070d30_panel, panel);
}
static int rb070d30_panel_prepare(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
int ret;
ret = regulator_enable(ctx->supply);
if (ret < 0) {
dev_err(&ctx->dsi->dev, "Failed to enable supply: %d\n", ret);
return ret;
}
msleep(20);
gpiod_set_value(ctx->gpios.power, 1);
msleep(20);
gpiod_set_value(ctx->gpios.reset, 1);
msleep(20);
return 0;
}
static int rb070d30_panel_unprepare(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
gpiod_set_value(ctx->gpios.reset, 0);
gpiod_set_value(ctx->gpios.power, 0);
regulator_disable(ctx->supply);
return 0;
}
static int rb070d30_panel_enable(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
return mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
}
static int rb070d30_panel_disable(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
}
/* Default timings */
static const struct drm_display_mode default_mode = {
.clock = 51206,
.hdisplay = 1024,
.hsync_start = 1024 + 160,
.hsync_end = 1024 + 160 + 80,
.htotal = 1024 + 160 + 80 + 80,
.vdisplay = 600,
.vsync_start = 600 + 12,
.vsync_end = 600 + 12 + 10,
.vtotal = 600 + 12 + 10 + 13,
.width_mm = 154,
.height_mm = 85,
};
static int rb070d30_panel_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
struct drm_display_mode *mode;
static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
mode = drm_mode_duplicate(connector->dev, &default_mode);
if (!mode) {
dev_err(&ctx->dsi->dev, "Failed to add mode " DRM_MODE_FMT "\n",
DRM_MODE_ARG(&default_mode));
return -EINVAL;
}
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
connector->display_info.bpc = 8;
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
drm_display_info_set_bus_formats(&connector->display_info,
&bus_format, 1);
return 1;
}
static const struct drm_panel_funcs rb070d30_panel_funcs = {
.get_modes = rb070d30_panel_get_modes,
.prepare = rb070d30_panel_prepare,
.enable = rb070d30_panel_enable,
.disable = rb070d30_panel_disable,
.unprepare = rb070d30_panel_unprepare,
};
static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi)
{
struct rb070d30_panel *ctx;
int ret;
ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd");
if (IS_ERR(ctx->supply))
return PTR_ERR(ctx->supply);
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dsi = dsi;
drm_panel_init(&ctx->panel, &dsi->dev, &rb070d30_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.reset)) {
dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
return PTR_ERR(ctx->gpios.reset);
}
ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.power)) {
dev_err(&dsi->dev, "Couldn't get our power GPIO\n");
return PTR_ERR(ctx->gpios.power);
}
/*
* We don't change the state of that GPIO later on but we need
* to force it into a low state.
*/
ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.updn)) {
dev_err(&dsi->dev, "Couldn't get our updn GPIO\n");
return PTR_ERR(ctx->gpios.updn);
}
/*
* We don't change the state of that GPIO later on but we need
* to force it into a low state.
*/
ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.shlr)) {
dev_err(&dsi->dev, "Couldn't get our shlr GPIO\n");
return PTR_ERR(ctx->gpios.shlr);
}
ret = drm_panel_of_backlight(&ctx->panel);
if (ret)
return ret;
drm_panel_add(&ctx->panel);
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->lanes = 4;
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
drm_panel_remove(&ctx->panel);
return ret;
}
return 0;
}
static void rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)
{
struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi);
mipi_dsi_detach(dsi);
drm_panel_remove(&ctx->panel);
}
static const struct of_device_id rb070d30_panel_of_match[] = {
{ .compatible = "ronbo,rb070d30" },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match);
static struct mipi_dsi_driver rb070d30_panel_driver = {
.probe = rb070d30_panel_dsi_probe,
.remove = rb070d30_panel_dsi_remove,
.driver = {
.name = "panel-ronbo-rb070d30",
.of_match_table = rb070d30_panel_of_match,
},
};
module_mipi_dsi_driver(rb070d30_panel_driver);
MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>");
MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>");
MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver");
MODULE_LICENSE("GPL");
|
