summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
blob: cf078f0d3cd349d9345727f4b93d86ee1920b052 (plain)
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
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
// SPDX-License-Identifier: GPL-2.0
/*
 * NewVision NV3052C IPS LCD panel driver
 *
 * Copyright (C) 2020, Paul Cercueil <paul@crapouillou.net>
 * Copyright (C) 2022, Christophe Branchereau <cbranchereau@gmail.com>
 */

#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dbi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>

struct nv3052c_panel_info {
	const struct drm_display_mode *display_modes;
	unsigned int num_modes;
	u16 width_mm, height_mm;
	u32 bus_format, bus_flags;
};

struct nv3052c {
	struct device *dev;
	struct drm_panel panel;
	struct mipi_dbi dbi;
	const struct nv3052c_panel_info *panel_info;
	struct regulator *supply;
	struct gpio_desc *reset_gpio;
};

struct nv3052c_reg {
	u8 cmd;
	u8 val;
};

static const struct nv3052c_reg nv3052c_panel_regs[] = {
	{ 0xff, 0x30 },
	{ 0xff, 0x52 },
	{ 0xff, 0x01 },
	{ 0xe3, 0x00 },
	{ 0x40, 0x00 },
	{ 0x03, 0x40 },
	{ 0x04, 0x00 },
	{ 0x05, 0x03 },
	{ 0x08, 0x00 },
	{ 0x09, 0x07 },
	{ 0x0a, 0x01 },
	{ 0x0b, 0x32 },
	{ 0x0c, 0x32 },
	{ 0x0d, 0x0b },
	{ 0x0e, 0x00 },
	{ 0x23, 0xa0 },
	{ 0x24, 0x0c },
	{ 0x25, 0x06 },
	{ 0x26, 0x14 },
	{ 0x27, 0x14 },
	{ 0x38, 0xcc },
	{ 0x39, 0xd7 },
	{ 0x3a, 0x4a },
	{ 0x28, 0x40 },
	{ 0x29, 0x01 },
	{ 0x2a, 0xdf },
	{ 0x49, 0x3c },
	{ 0x91, 0x77 },
	{ 0x92, 0x77 },
	{ 0xa0, 0x55 },
	{ 0xa1, 0x50 },
	{ 0xa4, 0x9c },
	{ 0xa7, 0x02 },
	{ 0xa8, 0x01 },
	{ 0xa9, 0x01 },
	{ 0xaa, 0xfc },
	{ 0xab, 0x28 },
	{ 0xac, 0x06 },
	{ 0xad, 0x06 },
	{ 0xae, 0x06 },
	{ 0xaf, 0x03 },
	{ 0xb0, 0x08 },
	{ 0xb1, 0x26 },
	{ 0xb2, 0x28 },
	{ 0xb3, 0x28 },
	{ 0xb4, 0x33 },
	{ 0xb5, 0x08 },
	{ 0xb6, 0x26 },
	{ 0xb7, 0x08 },
	{ 0xb8, 0x26 },
	{ 0xf0, 0x00 },
	{ 0xf6, 0xc0 },
	{ 0xff, 0x30 },
	{ 0xff, 0x52 },
	{ 0xff, 0x02 },
	{ 0xb0, 0x0b },
	{ 0xb1, 0x16 },
	{ 0xb2, 0x17 },
	{ 0xb3, 0x2c },
	{ 0xb4, 0x32 },
	{ 0xb5, 0x3b },
	{ 0xb6, 0x29 },
	{ 0xb7, 0x40 },
	{ 0xb8, 0x0d },
	{ 0xb9, 0x05 },
	{ 0xba, 0x12 },
	{ 0xbb, 0x10 },
	{ 0xbc, 0x12 },
	{ 0xbd, 0x15 },
	{ 0xbe, 0x19 },
	{ 0xbf, 0x0e },
	{ 0xc0, 0x16 },
	{ 0xc1, 0x0a },
	{ 0xd0, 0x0c },
	{ 0xd1, 0x17 },
	{ 0xd2, 0x14 },
	{ 0xd3, 0x2e },
	{ 0xd4, 0x32 },
	{ 0xd5, 0x3c },
	{ 0xd6, 0x22 },
	{ 0xd7, 0x3d },
	{ 0xd8, 0x0d },
	{ 0xd9, 0x07 },
	{ 0xda, 0x13 },
	{ 0xdb, 0x13 },
	{ 0xdc, 0x11 },
	{ 0xdd, 0x15 },
	{ 0xde, 0x19 },
	{ 0xdf, 0x10 },
	{ 0xe0, 0x17 },
	{ 0xe1, 0x0a },
	{ 0xff, 0x30 },
	{ 0xff, 0x52 },
	{ 0xff, 0x03 },
	{ 0x00, 0x2a },
	{ 0x01, 0x2a },
	{ 0x02, 0x2a },
	{ 0x03, 0x2a },
	{ 0x04, 0x61 },
	{ 0x05, 0x80 },
	{ 0x06, 0xc7 },
	{ 0x07, 0x01 },
	{ 0x08, 0x03 },
	{ 0x09, 0x04 },
	{ 0x70, 0x22 },
	{ 0x71, 0x80 },
	{ 0x30, 0x2a },
	{ 0x31, 0x2a },
	{ 0x32, 0x2a },
	{ 0x33, 0x2a },
	{ 0x34, 0x61 },
	{ 0x35, 0xc5 },
	{ 0x36, 0x80 },
	{ 0x37, 0x23 },
	{ 0x40, 0x03 },
	{ 0x41, 0x04 },
	{ 0x42, 0x05 },
	{ 0x43, 0x06 },
	{ 0x44, 0x11 },
	{ 0x45, 0xe8 },
	{ 0x46, 0xe9 },
	{ 0x47, 0x11 },
	{ 0x48, 0xea },
	{ 0x49, 0xeb },
	{ 0x50, 0x07 },
	{ 0x51, 0x08 },
	{ 0x52, 0x09 },
	{ 0x53, 0x0a },
	{ 0x54, 0x11 },
	{ 0x55, 0xec },
	{ 0x56, 0xed },
	{ 0x57, 0x11 },
	{ 0x58, 0xef },
	{ 0x59, 0xf0 },
	{ 0xb1, 0x01 },
	{ 0xb4, 0x15 },
	{ 0xb5, 0x16 },
	{ 0xb6, 0x09 },
	{ 0xb7, 0x0f },
	{ 0xb8, 0x0d },
	{ 0xb9, 0x0b },
	{ 0xba, 0x00 },
	{ 0xc7, 0x02 },
	{ 0xca, 0x17 },
	{ 0xcb, 0x18 },
	{ 0xcc, 0x0a },
	{ 0xcd, 0x10 },
	{ 0xce, 0x0e },
	{ 0xcf, 0x0c },
	{ 0xd0, 0x00 },
	{ 0x81, 0x00 },
	{ 0x84, 0x15 },
	{ 0x85, 0x16 },
	{ 0x86, 0x10 },
	{ 0x87, 0x0a },
	{ 0x88, 0x0c },
	{ 0x89, 0x0e },
	{ 0x8a, 0x02 },
	{ 0x97, 0x00 },
	{ 0x9a, 0x17 },
	{ 0x9b, 0x18 },
	{ 0x9c, 0x0f },
	{ 0x9d, 0x09 },
	{ 0x9e, 0x0b },
	{ 0x9f, 0x0d },
	{ 0xa0, 0x01 },
	{ 0xff, 0x30 },
	{ 0xff, 0x52 },
	{ 0xff, 0x02 },
	{ 0x01, 0x01 },
	{ 0x02, 0xda },
	{ 0x03, 0xba },
	{ 0x04, 0xa8 },
	{ 0x05, 0x9a },
	{ 0x06, 0x70 },
	{ 0x07, 0xff },
	{ 0x08, 0x91 },
	{ 0x09, 0x90 },
	{ 0x0a, 0xff },
	{ 0x0b, 0x8f },
	{ 0x0c, 0x60 },
	{ 0x0d, 0x58 },
	{ 0x0e, 0x48 },
	{ 0x0f, 0x38 },
	{ 0x10, 0x2b },
	{ 0xff, 0x30 },
	{ 0xff, 0x52 },
	{ 0xff, 0x00 },
	{ 0x36, 0x0a },
};

static inline struct nv3052c *to_nv3052c(struct drm_panel *panel)
{
	return container_of(panel, struct nv3052c, panel);
}

static int nv3052c_prepare(struct drm_panel *panel)
{
	struct nv3052c *priv = to_nv3052c(panel);
	struct mipi_dbi *dbi = &priv->dbi;
	unsigned int i;
	int err;

	err = regulator_enable(priv->supply);
	if (err) {
		dev_err(priv->dev, "Failed to enable power supply: %d\n", err);
		return err;
	}

	/* Reset the chip */
	gpiod_set_value_cansleep(priv->reset_gpio, 1);
	usleep_range(10, 1000);
	gpiod_set_value_cansleep(priv->reset_gpio, 0);
	usleep_range(5000, 20000);

	for (i = 0; i < ARRAY_SIZE(nv3052c_panel_regs); i++) {
		err = mipi_dbi_command(dbi, nv3052c_panel_regs[i].cmd,
				       nv3052c_panel_regs[i].val);

		if (err) {
			dev_err(priv->dev, "Unable to set register: %d\n", err);
			goto err_disable_regulator;
		}
	}

	err = mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
	if (err) {
		dev_err(priv->dev, "Unable to exit sleep mode: %d\n", err);
		goto err_disable_regulator;
	}

	return 0;

err_disable_regulator:
	regulator_disable(priv->supply);
	return err;
}

static int nv3052c_unprepare(struct drm_panel *panel)
{
	struct nv3052c *priv = to_nv3052c(panel);
	struct mipi_dbi *dbi = &priv->dbi;
	int err;

	err = mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);
	if (err)
		dev_err(priv->dev, "Unable to enter sleep mode: %d\n", err);

	gpiod_set_value_cansleep(priv->reset_gpio, 1);
	regulator_disable(priv->supply);

	return 0;
}

static int nv3052c_enable(struct drm_panel *panel)
{
	struct nv3052c *priv = to_nv3052c(panel);
	struct mipi_dbi *dbi = &priv->dbi;
	int err;

	err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
	if (err) {
		dev_err(priv->dev, "Unable to enable display: %d\n", err);
		return err;
	}

	if (panel->backlight) {
		/* Wait for the picture to be ready before enabling backlight */
		msleep(120);
	}

	return 0;
}

static int nv3052c_disable(struct drm_panel *panel)
{
	struct nv3052c *priv = to_nv3052c(panel);
	struct mipi_dbi *dbi = &priv->dbi;
	int err;

	err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
	if (err) {
		dev_err(priv->dev, "Unable to disable display: %d\n", err);
		return err;
	}

	return 0;
}

static int nv3052c_get_modes(struct drm_panel *panel,
			     struct drm_connector *connector)
{
	struct nv3052c *priv = to_nv3052c(panel);
	const struct nv3052c_panel_info *panel_info = priv->panel_info;
	struct drm_display_mode *mode;
	unsigned int i;

	for (i = 0; i < panel_info->num_modes; i++) {
		mode = drm_mode_duplicate(connector->dev,
					  &panel_info->display_modes[i]);
		if (!mode)
			return -ENOMEM;

		drm_mode_set_name(mode);

		mode->type = DRM_MODE_TYPE_DRIVER;
		if (panel_info->num_modes == 1)
			mode->type |= DRM_MODE_TYPE_PREFERRED;

		drm_mode_probed_add(connector, mode);
	}

	connector->display_info.bpc = 8;
	connector->display_info.width_mm = panel_info->width_mm;
	connector->display_info.height_mm = panel_info->height_mm;

	drm_display_info_set_bus_formats(&connector->display_info,
					 &panel_info->bus_format, 1);
	connector->display_info.bus_flags = panel_info->bus_flags;

	return panel_info->num_modes;
}

static const struct drm_panel_funcs nv3052c_funcs = {
	.prepare	= nv3052c_prepare,
	.unprepare	= nv3052c_unprepare,
	.enable		= nv3052c_enable,
	.disable	= nv3052c_disable,
	.get_modes	= nv3052c_get_modes,
};

static int nv3052c_probe(struct spi_device *spi)
{
	struct device *dev = &spi->dev;
	struct nv3052c *priv;
	int err;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->dev = dev;

	priv->panel_info = of_device_get_match_data(dev);
	if (!priv->panel_info)
		return -EINVAL;

	priv->supply = devm_regulator_get(dev, "power");
	if (IS_ERR(priv->supply))
		return dev_err_probe(dev, PTR_ERR(priv->supply), "Failed to get power supply\n");

	priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
	if (IS_ERR(priv->reset_gpio))
		return dev_err_probe(dev, PTR_ERR(priv->reset_gpio), "Failed to get reset GPIO\n");

	err = mipi_dbi_spi_init(spi, &priv->dbi, NULL);
	if (err)
		return dev_err_probe(dev, err, "MIPI DBI init failed\n");

	priv->dbi.read_commands = NULL;

	spi_set_drvdata(spi, priv);

	drm_panel_init(&priv->panel, dev, &nv3052c_funcs,
		       DRM_MODE_CONNECTOR_DPI);

	err = drm_panel_of_backlight(&priv->panel);
	if (err)
		return dev_err_probe(dev, err, "Failed to attach backlight\n");

	drm_panel_add(&priv->panel);

	return 0;
}

static void nv3052c_remove(struct spi_device *spi)
{
	struct nv3052c *priv = spi_get_drvdata(spi);

	drm_panel_remove(&priv->panel);
	drm_panel_disable(&priv->panel);
	drm_panel_unprepare(&priv->panel);
}

static const struct drm_display_mode ltk035c5444t_modes[] = {
	{ /* 60 Hz */
		.clock = 24000,
		.hdisplay = 640,
		.hsync_start = 640 + 96,
		.hsync_end = 640 + 96 + 16,
		.htotal = 640 + 96 + 16 + 48,
		.vdisplay = 480,
		.vsync_start = 480 + 5,
		.vsync_end = 480 + 5 + 2,
		.vtotal = 480 + 5 + 2 + 13,
		.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
	},
	{ /* 50 Hz */
		.clock = 18000,
		.hdisplay = 640,
		.hsync_start = 640 + 39,
		.hsync_end = 640 + 39 + 2,
		.htotal = 640 + 39 + 2 + 39,
		.vdisplay = 480,
		.vsync_start = 480 + 5,
		.vsync_end = 480 + 5 + 2,
		.vtotal = 480 + 5 + 2 + 13,
		.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
	},
};

static const struct nv3052c_panel_info ltk035c5444t_panel_info = {
	.display_modes = ltk035c5444t_modes,
	.num_modes = ARRAY_SIZE(ltk035c5444t_modes),
	.width_mm = 77,
	.height_mm = 64,
	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
};

static const struct of_device_id nv3052c_of_match[] = {
	{ .compatible = "leadtek,ltk035c5444t", .data = &ltk035c5444t_panel_info },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, nv3052c_of_match);

static struct spi_driver nv3052c_driver = {
	.driver = {
		.name = "nv3052c",
		.of_match_table = nv3052c_of_match,
	},
	.probe = nv3052c_probe,
	.remove = nv3052c_remove,
};
module_spi_driver(nv3052c_driver);

MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
MODULE_AUTHOR("Christophe Branchereau <cbranchereau@gmail.com>");
MODULE_LICENSE("GPL v2");