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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2024 BayLibre, SAS
4 * Author: Jerome Brunet <jbrunet@baylibre.com>
5 */
6
7#include <linux/gpio/consumer.h>
8#include <linux/module.h>
9#include <linux/of.h>
10#include <linux/regulator/consumer.h>
11
12#include <video/mipi_display.h>
13
14#include <drm/drm_device.h>
15#include <drm/drm_probe_helper.h>
16#include <drm/drm_mipi_dsi.h>
17#include <drm/drm_modes.h>
18#include <drm/drm_panel.h>
19
20struct lincoln_lcd197_panel {
21 struct drm_panel panel;
22 struct mipi_dsi_device *dsi;
23 struct regulator *supply;
24 struct gpio_desc *enable_gpio;
25 struct gpio_desc *reset_gpio;
26};
27
28static inline
29struct lincoln_lcd197_panel *to_lincoln_lcd197_panel(struct drm_panel *panel)
30{
31 return container_of(panel, struct lincoln_lcd197_panel, panel);
32}
33
34static int lincoln_lcd197_panel_prepare(struct drm_panel *panel)
35{
36 struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
37 struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
38 int err;
39
40 gpiod_set_value_cansleep(lcd->enable_gpio, 0);
41 err = regulator_enable(lcd->supply);
42 if (err < 0)
43 return err;
44
45 gpiod_set_value_cansleep(lcd->enable_gpio, 1);
46 usleep_range(1000, 2000);
47 gpiod_set_value_cansleep(lcd->reset_gpio, 1);
48 usleep_range(5000, 6000);
49 gpiod_set_value_cansleep(lcd->reset_gpio, 0);
50 msleep(50);
51
52 mipi_dsi_dcs_write_seq_multi(&ctx, 0xb9, 0xff, 0x83, 0x99);
53 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd2, 0x55);
54 mipi_dsi_dcs_write_seq_multi(&ctx, 0xb1, 0x02, 0x04, 0x70, 0x90, 0x01,
55 0x32, 0x33, 0x11, 0x11, 0x4d, 0x57, 0x56, 0x73,
56 0x02, 0x02);
57 mipi_dsi_dcs_write_seq_multi(&ctx, 0xb2, 0x00, 0x80, 0x80, 0xae, 0x0a,
58 0x0e, 0x75, 0x11, 0x00, 0x00, 0x00);
59 mipi_dsi_dcs_write_seq_multi(&ctx, 0xb4, 0x00, 0xff, 0x04, 0xa4, 0x02,
60 0xa0, 0x00, 0x00, 0x10, 0x00, 0x00, 0x02, 0x00,
61 0x24, 0x02, 0x04, 0x0a, 0x21, 0x03, 0x00, 0x00,
62 0x08, 0xa6, 0x88, 0x04, 0xa4, 0x02, 0xa0, 0x00,
63 0x00, 0x10, 0x00, 0x00, 0x02, 0x00, 0x24, 0x02,
64 0x04, 0x0a, 0x00, 0x00, 0x08, 0xa6, 0x00, 0x08,
65 0x11);
66 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd3, 0x00, 0x00, 0x00, 0x00, 0x00,
67 0x00, 0x18, 0x18, 0x32, 0x10, 0x09, 0x00, 0x09,
68 0x32, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
69 0x00, 0x00, 0x11, 0x00, 0x02, 0x02, 0x03, 0x00,
70 0x00, 0x00, 0x0a, 0x40);
71 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd5, 0x18, 0x18, 0x18, 0x18, 0x21,
72 0x20, 0x18, 0x18, 0x19, 0x19, 0x19, 0x19, 0x18,
73 0x18, 0x18, 0x18, 0x03, 0x02, 0x01, 0x00, 0x2f,
74 0x2f, 0x30, 0x30, 0x31, 0x31, 0x18, 0x18, 0x18,
75 0x18, 0x18, 0x18);
76 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd6, 0x18, 0x18, 0x18, 0x18, 0x20,
77 0x21, 0x19, 0x19, 0x18, 0x18, 0x19, 0x19, 0x18,
78 0x18, 0x18, 0x18, 0x00, 0x01, 0x02, 0x03, 0x2f,
79 0x2f, 0x30, 0x30, 0x31, 0x31, 0x18, 0x18, 0x18,
80 0x18, 0x18, 0x18);
81 mipi_dsi_dcs_write_seq_multi(&ctx, 0xbd, 0x01);
82 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0a, 0xbe, 0xfa, 0xa0, 0x0a,
83 0xbe, 0xfa, 0xa0);
84 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0f, 0xff, 0xff, 0xe0, 0x0f,
85 0xff, 0xff, 0xe0);
86 mipi_dsi_dcs_write_seq_multi(&ctx, 0xbd, 0x02);
87 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0f, 0xff, 0xff, 0xe0, 0x0f,
88 0xff, 0xff, 0xe0);
89 mipi_dsi_dcs_write_seq_multi(&ctx, 0xe0, 0x01, 0x11, 0x1c, 0x17, 0x39,
90 0x43, 0x54, 0x51, 0x5a, 0x64, 0x6c, 0x74, 0x7a,
91 0x83, 0x8d, 0x92, 0x99, 0xa4, 0xa9, 0xb4, 0xaa,
92 0xba, 0xbe, 0x63, 0x5e, 0x69, 0x73, 0x01, 0x11,
93 0x1c, 0x17, 0x39, 0x43, 0x54, 0x51, 0x5a, 0x64,
94 0x6c, 0x74, 0x7a, 0x83, 0x8d, 0x92, 0x99, 0xa4,
95 0xa7, 0xb2, 0xa9, 0xba, 0xbe, 0x63, 0x5e, 0x69,
96 0x73);
97 mipi_dsi_usleep_range(&ctx, 200, 300);
98 mipi_dsi_dcs_write_seq_multi(&ctx, 0xb6, 0x92, 0x92);
99 mipi_dsi_dcs_write_seq_multi(&ctx, 0xcc, 0x00);
100 mipi_dsi_dcs_write_seq_multi(&ctx, 0xbf, 0x40, 0x41, 0x50, 0x49);
101 mipi_dsi_dcs_write_seq_multi(&ctx, 0xc6, 0xff, 0xf9);
102 mipi_dsi_dcs_write_seq_multi(&ctx, 0xc0, 0x25, 0x5a);
103 mipi_dsi_dcs_write_seq_multi(&ctx, MIPI_DCS_SET_ADDRESS_MODE, 0x02);
104 mipi_dsi_dcs_exit_sleep_mode_multi(&ctx);
105 mipi_dsi_msleep(&ctx, 120);
106
107 if (ctx.accum_err) {
108 gpiod_set_value_cansleep(lcd->enable_gpio, 0);
109 gpiod_set_value_cansleep(lcd->reset_gpio, 1);
110 regulator_disable(lcd->supply);
111 }
112
113 return ctx.accum_err;
114}
115
116static int lincoln_lcd197_panel_unprepare(struct drm_panel *panel)
117{
118 struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
119 struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
120
121 mipi_dsi_dcs_enter_sleep_mode_multi(&ctx);
122 mipi_dsi_usleep_range(&ctx, 5000, 6000);
123 gpiod_set_value_cansleep(lcd->enable_gpio, 0);
124 gpiod_set_value_cansleep(lcd->reset_gpio, 1);
125 regulator_disable(lcd->supply);
126
127 return ctx.accum_err;
128}
129
130static int lincoln_lcd197_panel_enable(struct drm_panel *panel)
131{
132 struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
133 struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
134
135 mipi_dsi_dcs_set_display_on_multi(&ctx);
136 mipi_dsi_msleep(&ctx, 20);
137
138 return ctx.accum_err;
139}
140
141static int lincoln_lcd197_panel_disable(struct drm_panel *panel)
142{
143 struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
144 struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
145
146 mipi_dsi_dcs_set_display_off_multi(&ctx);
147 mipi_dsi_msleep(&ctx, 50);
148
149 return ctx.accum_err;
150}
151
152static const struct drm_display_mode lcd197_mode = {
153 .clock = 154002,
154 .hdisplay = 1080,
155 .hsync_start = 1080 + 20,
156 .hsync_end = 1080 + 20 + 6,
157 .htotal = 1080 + 204,
158 .vdisplay = 1920,
159 .vsync_start = 1920 + 4,
160 .vsync_end = 1920 + 4 + 4,
161 .vtotal = 1920 + 79,
162 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
163 .width_mm = 79,
164 .height_mm = 125,
165 .type = DRM_MODE_TYPE_DRIVER,
166};
167
168static int lincoln_lcd197_panel_get_modes(struct drm_panel *panel,
169 struct drm_connector *connector)
170{
171 return drm_connector_helper_get_modes_fixed(connector, &lcd197_mode);
172}
173
174static const struct drm_panel_funcs lincoln_lcd197_panel_funcs = {
175 .prepare = lincoln_lcd197_panel_prepare,
176 .unprepare = lincoln_lcd197_panel_unprepare,
177 .enable = lincoln_lcd197_panel_enable,
178 .disable = lincoln_lcd197_panel_disable,
179 .get_modes = lincoln_lcd197_panel_get_modes,
180};
181
182static int lincoln_lcd197_panel_probe(struct mipi_dsi_device *dsi)
183{
184 struct lincoln_lcd197_panel *lcd;
185 struct device *dev = &dsi->dev;
186 int err;
187
188 dsi->lanes = 4;
189 dsi->format = MIPI_DSI_FMT_RGB888;
190 dsi->mode_flags = (MIPI_DSI_MODE_VIDEO |
191 MIPI_DSI_MODE_VIDEO_BURST);
192
193 lcd = devm_kzalloc(&dsi->dev, sizeof(*lcd), GFP_KERNEL);
194 if (!lcd)
195 return -ENOMEM;
196
197 mipi_dsi_set_drvdata(dsi, lcd);
198 lcd->dsi = dsi;
199
200 lcd->supply = devm_regulator_get(dev, "power");
201 if (IS_ERR(lcd->supply))
202 return dev_err_probe(dev, PTR_ERR(lcd->supply),
203 "failed to get power supply");
204
205 lcd->enable_gpio = devm_gpiod_get(dev, "enable",
206 GPIOD_OUT_HIGH);
207 if (IS_ERR(lcd->enable_gpio))
208 return dev_err_probe(dev, PTR_ERR(lcd->enable_gpio),
209 "failed to get enable gpio");
210
211 lcd->reset_gpio = devm_gpiod_get(dev, "reset",
212 GPIOD_OUT_HIGH);
213 if (IS_ERR(lcd->reset_gpio))
214 return dev_err_probe(dev, PTR_ERR(lcd->reset_gpio),
215 "failed to get reset gpio");
216
217 drm_panel_init(&lcd->panel, dev,
218 &lincoln_lcd197_panel_funcs, DRM_MODE_CONNECTOR_DSI);
219
220 err = drm_panel_of_backlight(&lcd->panel);
221 if (err)
222 return err;
223
224 drm_panel_add(&lcd->panel);
225 err = mipi_dsi_attach(dsi);
226 if (err)
227 drm_panel_remove(&lcd->panel);
228
229 return err;
230}
231
232static void lincoln_lcd197_panel_remove(struct mipi_dsi_device *dsi)
233{
234 struct lincoln_lcd197_panel *lcd = mipi_dsi_get_drvdata(dsi);
235 int err;
236
237 err = mipi_dsi_detach(dsi);
238 if (err < 0)
239 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
240
241 drm_panel_remove(&lcd->panel);
242}
243
244static const struct of_device_id lincoln_lcd197_of_match[] = {
245 { .compatible = "lincolntech,lcd197", },
246 { /* sentinel */ }
247};
248MODULE_DEVICE_TABLE(of, lincoln_lcd197_of_match);
249
250static struct mipi_dsi_driver lincoln_lcd197_panel_driver = {
251 .driver = {
252 .name = "panel-lincolntech-lcd197",
253 .of_match_table = lincoln_lcd197_of_match,
254 },
255 .probe = lincoln_lcd197_panel_probe,
256 .remove = lincoln_lcd197_panel_remove,
257};
258module_mipi_dsi_driver(lincoln_lcd197_panel_driver);
259
260MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
261MODULE_DESCRIPTION("Lincoln Technologies LCD197 panel driver");
262MODULE_LICENSE("GPL");