summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c
blob: 21e48923836d4a2b01b10e7dde3c78ba9d95fbe9 (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
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2019 Theobroma Systems Design und Consulting GmbH
 *
 * base on panel-kingdisplay-kd097d04.c
 * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
 */

#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>

#include <video/mipi_display.h>

#include <drm/drm_crtc.h>
#include <drm/drm_device.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>

struct ltk500hd1829 {
	struct device *dev;
	struct drm_panel panel;
	struct gpio_desc *reset_gpio;
	struct regulator *vcc;
	struct regulator *iovcc;
	bool prepared;
};

struct ltk500hd1829_cmd {
	char cmd;
	char data;
};

/*
 * There is no description in the Reference Manual about these commands.
 * We received them from the vendor, so just use them as is.
 */
static const struct ltk500hd1829_cmd init_code[] = {
	{ 0xE0, 0x00 },
	{ 0xE1, 0x93 },
	{ 0xE2, 0x65 },
	{ 0xE3, 0xF8 },
	{ 0x80, 0x03 },
	{ 0xE0, 0x04 },
	{ 0x2D, 0x03 },
	{ 0xE0, 0x01 },
	{ 0x00, 0x00 },
	{ 0x01, 0xB6 },
	{ 0x03, 0x00 },
	{ 0x04, 0xC5 },
	{ 0x17, 0x00 },
	{ 0x18, 0xBF },
	{ 0x19, 0x01 },
	{ 0x1A, 0x00 },
	{ 0x1B, 0xBF },
	{ 0x1C, 0x01 },
	{ 0x1F, 0x7C },
	{ 0x20, 0x26 },
	{ 0x21, 0x26 },
	{ 0x22, 0x4E },
	{ 0x37, 0x09 },
	{ 0x38, 0x04 },
	{ 0x39, 0x08 },
	{ 0x3A, 0x1F },
	{ 0x3B, 0x1F },
	{ 0x3C, 0x78 },
	{ 0x3D, 0xFF },
	{ 0x3E, 0xFF },
	{ 0x3F, 0x00 },
	{ 0x40, 0x04 },
	{ 0x41, 0xA0 },
	{ 0x43, 0x0F },
	{ 0x44, 0x0A },
	{ 0x45, 0x24 },
	{ 0x55, 0x01 },
	{ 0x56, 0x01 },
	{ 0x57, 0xA5 },
	{ 0x58, 0x0A },
	{ 0x59, 0x4A },
	{ 0x5A, 0x38 },
	{ 0x5B, 0x10 },
	{ 0x5C, 0x19 },
	{ 0x5D, 0x7C },
	{ 0x5E, 0x64 },
	{ 0x5F, 0x54 },
	{ 0x60, 0x48 },
	{ 0x61, 0x44 },
	{ 0x62, 0x35 },
	{ 0x63, 0x3A },
	{ 0x64, 0x24 },
	{ 0x65, 0x3B },
	{ 0x66, 0x39 },
	{ 0x67, 0x37 },
	{ 0x68, 0x56 },
	{ 0x69, 0x41 },
	{ 0x6A, 0x47 },
	{ 0x6B, 0x2F },
	{ 0x6C, 0x23 },
	{ 0x6D, 0x13 },
	{ 0x6E, 0x02 },
	{ 0x6F, 0x08 },
	{ 0x70, 0x7C },
	{ 0x71, 0x64 },
	{ 0x72, 0x54 },
	{ 0x73, 0x48 },
	{ 0x74, 0x44 },
	{ 0x75, 0x35 },
	{ 0x76, 0x3A },
	{ 0x77, 0x22 },
	{ 0x78, 0x3B },
	{ 0x79, 0x39 },
	{ 0x7A, 0x38 },
	{ 0x7B, 0x52 },
	{ 0x7C, 0x41 },
	{ 0x7D, 0x47 },
	{ 0x7E, 0x2F },
	{ 0x7F, 0x23 },
	{ 0x80, 0x13 },
	{ 0x81, 0x02 },
	{ 0x82, 0x08 },
	{ 0xE0, 0x02 },
	{ 0x00, 0x57 },
	{ 0x01, 0x77 },
	{ 0x02, 0x44 },
	{ 0x03, 0x46 },
	{ 0x04, 0x48 },
	{ 0x05, 0x4A },
	{ 0x06, 0x4C },
	{ 0x07, 0x4E },
	{ 0x08, 0x50 },
	{ 0x09, 0x55 },
	{ 0x0A, 0x52 },
	{ 0x0B, 0x55 },
	{ 0x0C, 0x55 },
	{ 0x0D, 0x55 },
	{ 0x0E, 0x55 },
	{ 0x0F, 0x55 },
	{ 0x10, 0x55 },
	{ 0x11, 0x55 },
	{ 0x12, 0x55 },
	{ 0x13, 0x40 },
	{ 0x14, 0x55 },
	{ 0x15, 0x55 },
	{ 0x16, 0x57 },
	{ 0x17, 0x77 },
	{ 0x18, 0x45 },
	{ 0x19, 0x47 },
	{ 0x1A, 0x49 },
	{ 0x1B, 0x4B },
	{ 0x1C, 0x4D },
	{ 0x1D, 0x4F },
	{ 0x1E, 0x51 },
	{ 0x1F, 0x55 },
	{ 0x20, 0x53 },
	{ 0x21, 0x55 },
	{ 0x22, 0x55 },
	{ 0x23, 0x55 },
	{ 0x24, 0x55 },
	{ 0x25, 0x55 },
	{ 0x26, 0x55 },
	{ 0x27, 0x55 },
	{ 0x28, 0x55 },
	{ 0x29, 0x41 },
	{ 0x2A, 0x55 },
	{ 0x2B, 0x55 },
	{ 0x2C, 0x57 },
	{ 0x2D, 0x77 },
	{ 0x2E, 0x4F },
	{ 0x2F, 0x4D },
	{ 0x30, 0x4B },
	{ 0x31, 0x49 },
	{ 0x32, 0x47 },
	{ 0x33, 0x45 },
	{ 0x34, 0x41 },
	{ 0x35, 0x55 },
	{ 0x36, 0x53 },
	{ 0x37, 0x55 },
	{ 0x38, 0x55 },
	{ 0x39, 0x55 },
	{ 0x3A, 0x55 },
	{ 0x3B, 0x55 },
	{ 0x3C, 0x55 },
	{ 0x3D, 0x55 },
	{ 0x3E, 0x55 },
	{ 0x3F, 0x51 },
	{ 0x40, 0x55 },
	{ 0x41, 0x55 },
	{ 0x42, 0x57 },
	{ 0x43, 0x77 },
	{ 0x44, 0x4E },
	{ 0x45, 0x4C },
	{ 0x46, 0x4A },
	{ 0x47, 0x48 },
	{ 0x48, 0x46 },
	{ 0x49, 0x44 },
	{ 0x4A, 0x40 },
	{ 0x4B, 0x55 },
	{ 0x4C, 0x52 },
	{ 0x4D, 0x55 },
	{ 0x4E, 0x55 },
	{ 0x4F, 0x55 },
	{ 0x50, 0x55 },
	{ 0x51, 0x55 },
	{ 0x52, 0x55 },
	{ 0x53, 0x55 },
	{ 0x54, 0x55 },
	{ 0x55, 0x50 },
	{ 0x56, 0x55 },
	{ 0x57, 0x55 },
	{ 0x58, 0x40 },
	{ 0x59, 0x00 },
	{ 0x5A, 0x00 },
	{ 0x5B, 0x10 },
	{ 0x5C, 0x09 },
	{ 0x5D, 0x30 },
	{ 0x5E, 0x01 },
	{ 0x5F, 0x02 },
	{ 0x60, 0x30 },
	{ 0x61, 0x03 },
	{ 0x62, 0x04 },
	{ 0x63, 0x06 },
	{ 0x64, 0x6A },
	{ 0x65, 0x75 },
	{ 0x66, 0x0F },
	{ 0x67, 0xB3 },
	{ 0x68, 0x0B },
	{ 0x69, 0x06 },
	{ 0x6A, 0x6A },
	{ 0x6B, 0x10 },
	{ 0x6C, 0x00 },
	{ 0x6D, 0x04 },
	{ 0x6E, 0x04 },
	{ 0x6F, 0x88 },
	{ 0x70, 0x00 },
	{ 0x71, 0x00 },
	{ 0x72, 0x06 },
	{ 0x73, 0x7B },
	{ 0x74, 0x00 },
	{ 0x75, 0xBC },
	{ 0x76, 0x00 },
	{ 0x77, 0x05 },
	{ 0x78, 0x2E },
	{ 0x79, 0x00 },
	{ 0x7A, 0x00 },
	{ 0x7B, 0x00 },
	{ 0x7C, 0x00 },
	{ 0x7D, 0x03 },
	{ 0x7E, 0x7B },
	{ 0xE0, 0x04 },
	{ 0x09, 0x10 },
	{ 0x2B, 0x2B },
	{ 0x2E, 0x44 },
	{ 0xE0, 0x00 },
	{ 0xE6, 0x02 },
	{ 0xE7, 0x02 },
	{ 0x35, 0x00 },
};

static inline
struct ltk500hd1829 *panel_to_ltk500hd1829(struct drm_panel *panel)
{
	return container_of(panel, struct ltk500hd1829, panel);
}

static int ltk500hd1829_unprepare(struct drm_panel *panel)
{
	struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
	int ret;

	if (!ctx->prepared)
		return 0;

	ret = mipi_dsi_dcs_set_display_off(dsi);
	if (ret < 0)
		dev_err(panel->dev, "failed to set display off: %d\n", ret);

	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
	if (ret < 0) {
		dev_err(panel->dev, "failed to enter sleep mode: %d\n", ret);
	}

	/* 120ms to enter sleep mode */
	msleep(120);

	regulator_disable(ctx->iovcc);
	regulator_disable(ctx->vcc);

	ctx->prepared = false;

	return 0;
}

static int ltk500hd1829_prepare(struct drm_panel *panel)
{
	struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
	unsigned int i;
	int ret;

	if (ctx->prepared)
		return 0;

	ret = regulator_enable(ctx->vcc);
	if (ret < 0) {
		dev_err(ctx->dev, "Failed to enable vci supply: %d\n", ret);
		return ret;
	}
	ret = regulator_enable(ctx->iovcc);
	if (ret < 0) {
		dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);
		goto disable_vcc;
	}

	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
	/* tRW: 10us */
	usleep_range(10, 20);
	gpiod_set_value_cansleep(ctx->reset_gpio, 0);

	/* tRT: >= 5ms */
	usleep_range(5000, 6000);

	for (i = 0; i < ARRAY_SIZE(init_code); i++) {
		ret = mipi_dsi_generic_write(dsi, &init_code[i],
					     sizeof(struct ltk500hd1829_cmd));
		if (ret < 0) {
			dev_err(panel->dev, "failed to write init cmds: %d\n", ret);
			goto disable_iovcc;
		}
	}

	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
	if (ret < 0) {
		dev_err(panel->dev, "failed to exit sleep mode: %d\n", ret);
		goto disable_iovcc;
	}

	/* 120ms to exit sleep mode */
	msleep(120);

	ret = mipi_dsi_dcs_set_display_on(dsi);
	if (ret < 0) {
		dev_err(panel->dev, "failed to set display on: %d\n", ret);
		goto disable_iovcc;
	}

	ctx->prepared = true;

	return 0;

disable_iovcc:
	regulator_disable(ctx->iovcc);
disable_vcc:
	regulator_disable(ctx->vcc);
	return ret;
}

static const struct drm_display_mode default_mode = {
	.hdisplay	= 720,
	.hsync_start	= 720 + 50,
	.hsync_end	= 720 + 50 + 50,
	.htotal		= 720 + 50 + 50 + 50,
	.vdisplay	= 1280,
	.vsync_start	= 1280 + 30,
	.vsync_end	= 1280 + 30 + 4,
	.vtotal		= 1280 + 30 + 4 + 12,
	.clock		= 69217,
	.width_mm	= 62,
	.height_mm	= 110,
};

static int ltk500hd1829_get_modes(struct drm_panel *panel,
				  struct drm_connector *connector)
{
	struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
	struct drm_display_mode *mode;

	mode = drm_mode_duplicate(connector->dev, &default_mode);
	if (!mode) {
		dev_err(ctx->dev, "failed to add mode %ux%u@%u\n",
			default_mode.hdisplay, default_mode.vdisplay,
			drm_mode_vrefresh(&default_mode));
		return -ENOMEM;
	}

	drm_mode_set_name(mode);

	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
	connector->display_info.width_mm = mode->width_mm;
	connector->display_info.height_mm = mode->height_mm;
	drm_mode_probed_add(connector, mode);

	return 1;
}

static const struct drm_panel_funcs ltk500hd1829_funcs = {
	.unprepare = ltk500hd1829_unprepare,
	.prepare = ltk500hd1829_prepare,
	.get_modes = ltk500hd1829_get_modes,
};

static int ltk500hd1829_probe(struct mipi_dsi_device *dsi)
{
	struct ltk500hd1829 *ctx;
	struct device *dev = &dsi->dev;
	int ret;

	ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;

	ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
	if (IS_ERR(ctx->reset_gpio)) {
		dev_err(dev, "cannot get reset gpio\n");
		return PTR_ERR(ctx->reset_gpio);
	}

	ctx->vcc = devm_regulator_get(dev, "vcc");
	if (IS_ERR(ctx->vcc)) {
		ret = PTR_ERR(ctx->vcc);
		if (ret != -EPROBE_DEFER)
			dev_err(dev, "Failed to request vcc regulator: %d\n", ret);
		return ret;
	}

	ctx->iovcc = devm_regulator_get(dev, "iovcc");
	if (IS_ERR(ctx->iovcc)) {
		ret = PTR_ERR(ctx->iovcc);
		if (ret != -EPROBE_DEFER)
			dev_err(dev, "Failed to request iovcc regulator: %d\n", ret);
		return ret;
	}

	mipi_dsi_set_drvdata(dsi, ctx);

	ctx->dev = dev;

	dsi->lanes = 4;
	dsi->format = MIPI_DSI_FMT_RGB888;
	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
			  MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET;

	drm_panel_init(&ctx->panel, &dsi->dev, &ltk500hd1829_funcs,
		       DRM_MODE_CONNECTOR_DSI);

	ret = drm_panel_of_backlight(&ctx->panel);
	if (ret)
		return ret;

	drm_panel_add(&ctx->panel);

	ret = mipi_dsi_attach(dsi);
	if (ret < 0) {
		dev_err(dev, "mipi_dsi_attach failed: %d\n", ret);
		drm_panel_remove(&ctx->panel);
		return ret;
	}

	return 0;
}

static void ltk500hd1829_shutdown(struct mipi_dsi_device *dsi)
{
	struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi);
	int ret;

	ret = drm_panel_unprepare(&ctx->panel);
	if (ret < 0)
		dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);

	ret = drm_panel_disable(&ctx->panel);
	if (ret < 0)
		dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret);
}

static int ltk500hd1829_remove(struct mipi_dsi_device *dsi)
{
	struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi);
	int ret;

	ltk500hd1829_shutdown(dsi);

	ret = mipi_dsi_detach(dsi);
	if (ret < 0)
		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);

	drm_panel_remove(&ctx->panel);

	return 0;
}

static const struct of_device_id ltk500hd1829_of_match[] = {
	{ .compatible = "leadtek,ltk500hd1829", },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ltk500hd1829_of_match);

static struct mipi_dsi_driver ltk500hd1829_driver = {
	.driver = {
		.name = "panel-leadtek-ltk500hd1829",
		.of_match_table = ltk500hd1829_of_match,
	},
	.probe = ltk500hd1829_probe,
	.remove = ltk500hd1829_remove,
	.shutdown = ltk500hd1829_shutdown,
};
module_mipi_dsi_driver(ltk500hd1829_driver);

MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");
MODULE_DESCRIPTION("Leadtek LTK500HD1829 panel driver");
MODULE_LICENSE("GPL v2");