summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/panel/panel-novatek-nt35950.c
blob: 3a844917da075b1251f055cfe40b7045518929cb (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
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Novatek NT35950 DriverIC panels driver
 *
 * Copyright (c) 2021 AngeloGioacchino Del Regno
 *                    <angelogioacchino.delregno@somainline.org>
 */
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/regulator/consumer.h>

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

#define MCS_CMD_MAUCCTR			0xf0 /* Manufacturer command enable */
#define MCS_PARAM_SCALER_FUNCTION	0x58 /* Scale-up function */
#define MCS_PARAM_SCALEUP_MODE		0xc9
 #define MCS_SCALEUP_SIMPLE		0x0
 #define MCS_SCALEUP_BILINEAR		BIT(0)
 #define MCS_SCALEUP_DUPLICATE		(BIT(0) | BIT(4))

/* VESA Display Stream Compression param */
#define MCS_PARAM_VESA_DSC_ON		0x03

/* Data Compression mode */
#define MCS_PARAM_DATA_COMPRESSION	0x90
 #define MCS_DATA_COMPRESSION_NONE	0x00
 #define MCS_DATA_COMPRESSION_FBC	0x02
 #define MCS_DATA_COMPRESSION_DSC	0x03

/* Display Output control */
#define MCS_PARAM_DISP_OUTPUT_CTRL	0xb4
 #define MCS_DISP_OUT_SRAM_EN		BIT(0)
 #define MCS_DISP_OUT_VIDEO_MODE	BIT(4)

/* VESA Display Stream Compression setting */
#define MCS_PARAM_VESA_DSC_SETTING	0xc0

/* SubPixel Rendering (SPR) */
#define MCS_PARAM_SPR_EN		0xe3
#define MCS_PARAM_SPR_MODE		0xef
 #define MCS_SPR_MODE_YYG_RAINBOW_RGB	0x01

#define NT35950_VREG_MAX		4

struct nt35950 {
	struct drm_panel panel;
	struct drm_connector *connector;
	struct mipi_dsi_device *dsi[2];
	struct regulator_bulk_data vregs[NT35950_VREG_MAX];
	struct gpio_desc *reset_gpio;
	const struct nt35950_panel_desc *desc;

	int cur_mode;
	u8 last_page;
	bool prepared;
};

struct nt35950_panel_mode {
	const struct drm_display_mode mode;

	bool enable_sram;
	bool is_video_mode;
	u8 scaler_on;
	u8 scaler_mode;
	u8 compression;
	u8 spr_en;
	u8 spr_mode;
};

struct nt35950_panel_desc {
	const char *model_name;
	const struct mipi_dsi_device_info dsi_info;
	const struct nt35950_panel_mode *mode_data;

	bool is_dual_dsi;
	u8 num_lanes;
	u8 num_modes;
};

static inline struct nt35950 *to_nt35950(struct drm_panel *panel)
{
	return container_of(panel, struct nt35950, panel);
}

#define dsi_dcs_write_seq(dsi, seq...) do {				\
		static const u8 d[] = { seq };				\
		int ret;						\
		ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d));	\
		if (ret < 0)						\
			return ret;					\
	} while (0)

static void nt35950_reset(struct nt35950 *nt)
{
	gpiod_set_value_cansleep(nt->reset_gpio, 1);
	usleep_range(12000, 13000);
	gpiod_set_value_cansleep(nt->reset_gpio, 0);
	usleep_range(300, 400);
	gpiod_set_value_cansleep(nt->reset_gpio, 1);
	usleep_range(12000, 13000);
}

/*
 * nt35950_set_cmd2_page - Select manufacturer control (CMD2) page
 * @nt:   Main driver structure
 * @page: Page number (0-7)
 *
 * Return: Number of transferred bytes or negative number on error
 */
static int nt35950_set_cmd2_page(struct nt35950 *nt, u8 page)
{
	const u8 mauc_cmd2_page[] = { MCS_CMD_MAUCCTR, 0x55, 0xaa, 0x52,
				      0x08, page };
	int ret;

	ret = mipi_dsi_dcs_write_buffer(nt->dsi[0], mauc_cmd2_page,
					ARRAY_SIZE(mauc_cmd2_page));
	if (ret < 0)
		return ret;

	nt->last_page = page;
	return 0;
}

/*
 * nt35950_set_data_compression - Set data compression mode
 * @nt:        Main driver structure
 * @comp_mode: Compression mode
 *
 * Return: Number of transferred bytes or negative number on error
 */
static int nt35950_set_data_compression(struct nt35950 *nt, u8 comp_mode)
{
	u8 cmd_data_compression[] = { MCS_PARAM_DATA_COMPRESSION, comp_mode };
	u8 cmd_vesa_dsc_on[] = { MCS_PARAM_VESA_DSC_ON, !!comp_mode };
	u8 cmd_vesa_dsc_setting[] = { MCS_PARAM_VESA_DSC_SETTING, 0x03 };
	u8 last_page = nt->last_page;
	int ret;

	/* Set CMD2 Page 0 if we're not there yet */
	if (last_page != 0) {
		ret = nt35950_set_cmd2_page(nt, 0);
		if (ret < 0)
			return ret;
	}

	ret = mipi_dsi_dcs_write_buffer(nt->dsi[0], cmd_data_compression,
					ARRAY_SIZE(cmd_data_compression));
	if (ret < 0)
		return ret;

	ret = mipi_dsi_dcs_write_buffer(nt->dsi[0], cmd_vesa_dsc_on,
					ARRAY_SIZE(cmd_vesa_dsc_on));
	if (ret < 0)
		return ret;

	/* Set the vesa dsc setting on Page 4 */
	ret = nt35950_set_cmd2_page(nt, 4);
	if (ret < 0)
		return ret;

	/* Display Stream Compression setting, always 0x03 */
	ret = mipi_dsi_dcs_write_buffer(nt->dsi[0], cmd_vesa_dsc_setting,
					ARRAY_SIZE(cmd_vesa_dsc_setting));
	if (ret < 0)
		return ret;

	/* Get back to the previously set page */
	return nt35950_set_cmd2_page(nt, last_page);
}

/*
 * nt35950_set_scaler - Enable/disable resolution upscaling
 * @nt:        Main driver structure
 * @scale_up:  Scale up function control
 *
 * Return: Number of transferred bytes or negative number on error
 */
static int nt35950_set_scaler(struct nt35950 *nt, u8 scale_up)
{
	u8 cmd_scaler[] = { MCS_PARAM_SCALER_FUNCTION, scale_up };

	return mipi_dsi_dcs_write_buffer(nt->dsi[0], cmd_scaler,
					 ARRAY_SIZE(cmd_scaler));
}

/*
 * nt35950_set_scale_mode - Resolution upscaling mode
 * @nt:   Main driver structure
 * @mode: Scaler mode (MCS_DATA_COMPRESSION_*)
 *
 * Return: Number of transferred bytes or negative number on error
 */
static int nt35950_set_scale_mode(struct nt35950 *nt, u8 mode)
{
	u8 cmd_scaler[] = { MCS_PARAM_SCALEUP_MODE, mode };

	return mipi_dsi_dcs_write_buffer(nt->dsi[0], cmd_scaler,
					 ARRAY_SIZE(cmd_scaler));
}

/*
 * nt35950_inject_black_image - Display a completely black image
 * @nt:   Main driver structure
 *
 * After IC setup, the attached panel may show random data
 * due to driveric behavior changes (resolution, compression,
 * scaling, etc). This function, called after parameters setup,
 * makes the driver ic to output a completely black image to
 * the display.
 * It makes sense to push a black image before sending the sleep-out
 * and display-on commands.
 *
 * Return: Number of transferred bytes or negative number on error
 */
static int nt35950_inject_black_image(struct nt35950 *nt)
{
	const u8 cmd0_black_img[] = { 0x6f, 0x01 };
	const u8 cmd1_black_img[] = { 0xf3, 0x10 };
	u8 cmd_test[] = { 0xff, 0xaa, 0x55, 0xa5, 0x80 };
	int ret;

	/* Enable test command */
	ret = mipi_dsi_dcs_write_buffer(nt->dsi[0], cmd_test, ARRAY_SIZE(cmd_test));
	if (ret < 0)
		return ret;

	/* Send a black image */
	ret = mipi_dsi_dcs_write_buffer(nt->dsi[0], cmd0_black_img,
					ARRAY_SIZE(cmd0_black_img));
	if (ret < 0)
		return ret;
	ret = mipi_dsi_dcs_write_buffer(nt->dsi[0], cmd1_black_img,
					ARRAY_SIZE(cmd1_black_img));
	if (ret < 0)
		return ret;

	/* Disable test command */
	cmd_test[ARRAY_SIZE(cmd_test) - 1] = 0x00;
	return mipi_dsi_dcs_write_buffer(nt->dsi[0], cmd_test, ARRAY_SIZE(cmd_test));
}

/*
 * nt35950_set_dispout - Set Display Output register parameters
 * @nt:    Main driver structure
 *
 * Return: Number of transferred bytes or negative number on error
 */
static int nt35950_set_dispout(struct nt35950 *nt)
{
	u8 cmd_dispout[] = { MCS_PARAM_DISP_OUTPUT_CTRL, 0x00 };
	const struct nt35950_panel_mode *mode_data = nt->desc->mode_data;

	if (mode_data[nt->cur_mode].is_video_mode)
		cmd_dispout[1] |= MCS_DISP_OUT_VIDEO_MODE;
	if (mode_data[nt->cur_mode].enable_sram)
		cmd_dispout[1] |= MCS_DISP_OUT_SRAM_EN;

	return mipi_dsi_dcs_write_buffer(nt->dsi[0], cmd_dispout,
					 ARRAY_SIZE(cmd_dispout));
}

static int nt35950_get_current_mode(struct nt35950 *nt)
{
	struct drm_connector *connector = nt->connector;
	struct drm_crtc_state *crtc_state;
	int i;

	/* Return the default (first) mode if no info available yet */
	if (!connector->state || !connector->state->crtc)
		return 0;

	crtc_state = connector->state->crtc->state;

	for (i = 0; i < nt->desc->num_modes; i++) {
		if (drm_mode_match(&crtc_state->mode,
				   &nt->desc->mode_data[i].mode,
				   DRM_MODE_MATCH_TIMINGS | DRM_MODE_MATCH_CLOCK))
			return i;
	}

	return 0;
}

static int nt35950_on(struct nt35950 *nt)
{
	const struct nt35950_panel_mode *mode_data = nt->desc->mode_data;
	struct mipi_dsi_device *dsi = nt->dsi[0];
	struct device *dev = &dsi->dev;
	int ret;

	nt->cur_mode = nt35950_get_current_mode(nt);
	nt->dsi[0]->mode_flags |= MIPI_DSI_MODE_LPM;
	nt->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM;

	ret = nt35950_set_cmd2_page(nt, 0);
	if (ret < 0)
		return ret;

	ret = nt35950_set_data_compression(nt, mode_data[nt->cur_mode].compression);
	if (ret < 0)
		return ret;

	ret = nt35950_set_scale_mode(nt, mode_data[nt->cur_mode].scaler_mode);
	if (ret < 0)
		return ret;

	ret = nt35950_set_scaler(nt, mode_data[nt->cur_mode].scaler_on);
	if (ret < 0)
		return ret;

	ret = nt35950_set_dispout(nt);
	if (ret < 0)
		return ret;

	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
	if (ret < 0) {
		dev_err(dev, "Failed to set tear on: %d\n", ret);
		return ret;
	}

	ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0);
	if (ret < 0) {
		dev_err(dev, "Failed to set tear scanline: %d\n", ret);
		return ret;
	}

	/* CMD2 Page 1 */
	ret = nt35950_set_cmd2_page(nt, 1);
	if (ret < 0)
		return ret;

	/* Unknown command */
	dsi_dcs_write_seq(dsi, 0xd4, 0x88, 0x88);

	/* CMD2 Page 7 */
	ret = nt35950_set_cmd2_page(nt, 7);
	if (ret < 0)
		return ret;

	/* Enable SubPixel Rendering */
	dsi_dcs_write_seq(dsi, MCS_PARAM_SPR_EN, 0x01);

	/* SPR Mode: YYG Rainbow-RGB */
	dsi_dcs_write_seq(dsi, MCS_PARAM_SPR_MODE, MCS_SPR_MODE_YYG_RAINBOW_RGB);

	/* CMD3 */
	ret = nt35950_inject_black_image(nt);
	if (ret < 0)
		return ret;

	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
	if (ret < 0)
		return ret;
	msleep(120);

	ret = mipi_dsi_dcs_set_display_on(dsi);
	if (ret < 0)
		return ret;
	msleep(120);

	nt->dsi[0]->mode_flags &= ~MIPI_DSI_MODE_LPM;
	nt->dsi[1]->mode_flags &= ~MIPI_DSI_MODE_LPM;

	return 0;
}

static int nt35950_off(struct nt35950 *nt)
{
	struct device *dev = &nt->dsi[0]->dev;
	int ret;

	ret = mipi_dsi_dcs_set_display_off(nt->dsi[0]);
	if (ret < 0) {
		dev_err(dev, "Failed to set display off: %d\n", ret);
		goto set_lpm;
	}
	usleep_range(10000, 11000);

	ret = mipi_dsi_dcs_enter_sleep_mode(nt->dsi[0]);
	if (ret < 0) {
		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
		goto set_lpm;
	}
	msleep(150);

set_lpm:
	nt->dsi[0]->mode_flags |= MIPI_DSI_MODE_LPM;
	nt->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM;

	return 0;
}

static int nt35950_sharp_init_vregs(struct nt35950 *nt, struct device *dev)
{
	int ret;

	nt->vregs[0].supply = "vddio";
	nt->vregs[1].supply = "avdd";
	nt->vregs[2].supply = "avee";
	nt->vregs[3].supply = "dvdd";
	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(nt->vregs),
				      nt->vregs);
	if (ret < 0)
		return ret;

	ret = regulator_is_supported_voltage(nt->vregs[0].consumer,
					     1750000, 1950000);
	if (!ret)
		return -EINVAL;
	ret = regulator_is_supported_voltage(nt->vregs[1].consumer,
					     5200000, 5900000);
	if (!ret)
		return -EINVAL;
	/* AVEE is negative: -5.90V to -5.20V */
	ret = regulator_is_supported_voltage(nt->vregs[2].consumer,
					     5200000, 5900000);
	if (!ret)
		return -EINVAL;

	ret = regulator_is_supported_voltage(nt->vregs[3].consumer,
					     1300000, 1400000);
	if (!ret)
		return -EINVAL;

	return 0;
}

static int nt35950_prepare(struct drm_panel *panel)
{
	struct nt35950 *nt = to_nt35950(panel);
	struct device *dev = &nt->dsi[0]->dev;
	int ret;

	if (nt->prepared)
		return 0;

	ret = regulator_enable(nt->vregs[0].consumer);
	if (ret)
		return ret;
	usleep_range(2000, 5000);

	ret = regulator_enable(nt->vregs[3].consumer);
	if (ret)
		goto end;
	usleep_range(15000, 18000);

	ret = regulator_enable(nt->vregs[1].consumer);
	if (ret)
		goto end;

	ret = regulator_enable(nt->vregs[2].consumer);
	if (ret)
		goto end;
	usleep_range(12000, 13000);

	nt35950_reset(nt);

	ret = nt35950_on(nt);
	if (ret < 0) {
		dev_err(dev, "Failed to initialize panel: %d\n", ret);
		goto end;
	}
	nt->prepared = true;

end:
	if (ret < 0) {
		regulator_bulk_disable(ARRAY_SIZE(nt->vregs), nt->vregs);
		return ret;
	}

	return 0;
}

static int nt35950_unprepare(struct drm_panel *panel)
{
	struct nt35950 *nt = to_nt35950(panel);
	struct device *dev = &nt->dsi[0]->dev;
	int ret;

	if (!nt->prepared)
		return 0;

	ret = nt35950_off(nt);
	if (ret < 0)
		dev_err(dev, "Failed to deinitialize panel: %d\n", ret);

	gpiod_set_value_cansleep(nt->reset_gpio, 0);
	regulator_bulk_disable(ARRAY_SIZE(nt->vregs), nt->vregs);

	nt->prepared = false;
	return 0;
}

static int nt35950_get_modes(struct drm_panel *panel,
			     struct drm_connector *connector)
{
	struct nt35950 *nt = to_nt35950(panel);
	int i;

	for (i = 0; i < nt->desc->num_modes; i++) {
		struct drm_display_mode *mode;

		mode = drm_mode_duplicate(connector->dev,
					  &nt->desc->mode_data[i].mode);
		if (!mode)
			return -ENOMEM;

		drm_mode_set_name(mode);

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

		drm_mode_probed_add(connector, mode);
	}

	connector->display_info.bpc = 8;
	connector->display_info.height_mm = nt->desc->mode_data[0].mode.height_mm;
	connector->display_info.width_mm = nt->desc->mode_data[0].mode.width_mm;
	nt->connector = connector;

	return nt->desc->num_modes;
}

static const struct drm_panel_funcs nt35950_panel_funcs = {
	.prepare = nt35950_prepare,
	.unprepare = nt35950_unprepare,
	.get_modes = nt35950_get_modes,
};

static int nt35950_probe(struct mipi_dsi_device *dsi)
{
	struct device *dev = &dsi->dev;
	struct device_node *dsi_r;
	struct mipi_dsi_host *dsi_r_host;
	struct nt35950 *nt;
	const struct mipi_dsi_device_info *info;
	int i, num_dsis = 1, ret;

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

	ret = nt35950_sharp_init_vregs(nt, dev);
	if (ret)
		return dev_err_probe(dev, ret, "Regulator init failure.\n");

	nt->desc = of_device_get_match_data(dev);
	if (!nt->desc)
		return -ENODEV;

	nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_ASIS);
	if (IS_ERR(nt->reset_gpio)) {
		return dev_err_probe(dev, PTR_ERR(nt->reset_gpio),
				     "Failed to get reset gpio\n");
	}

	/* If the panel is connected on two DSIs then DSI0 left, DSI1 right */
	if (nt->desc->is_dual_dsi) {
		info = &nt->desc->dsi_info;
		dsi_r = of_graph_get_remote_node(dsi->dev.of_node, 1, -1);
		if (!dsi_r) {
			dev_err(dev, "Cannot get secondary DSI node.\n");
			return -ENODEV;
		}
		dsi_r_host = of_find_mipi_dsi_host_by_node(dsi_r);
		of_node_put(dsi_r);
		if (!dsi_r_host) {
			dev_err(dev, "Cannot get secondary DSI host\n");
			return -EPROBE_DEFER;
		}

		nt->dsi[1] = mipi_dsi_device_register_full(dsi_r_host, info);
		if (!nt->dsi[1]) {
			dev_err(dev, "Cannot get secondary DSI node\n");
			return -ENODEV;
		}
		num_dsis++;
	}

	nt->dsi[0] = dsi;
	mipi_dsi_set_drvdata(dsi, nt);

	drm_panel_init(&nt->panel, dev, &nt35950_panel_funcs,
		       DRM_MODE_CONNECTOR_DSI);

	ret = drm_panel_of_backlight(&nt->panel);
	if (ret)
		return dev_err_probe(dev, ret, "Failed to get backlight\n");

	drm_panel_add(&nt->panel);

	for (i = 0; i < num_dsis; i++) {
		nt->dsi[i]->lanes = nt->desc->num_lanes;
		nt->dsi[i]->format = MIPI_DSI_FMT_RGB888;

		nt->dsi[i]->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS |
					 MIPI_DSI_MODE_LPM;

		if (nt->desc->mode_data[0].is_video_mode)
			nt->dsi[i]->mode_flags |= MIPI_DSI_MODE_VIDEO;

		ret = mipi_dsi_attach(nt->dsi[i]);
		if (ret < 0) {
			return dev_err_probe(dev, ret,
					     "Cannot attach to DSI%d host.\n", i);
		}
	}

	/* Make sure to set RESX LOW before starting the power-on sequence */
	gpiod_set_value_cansleep(nt->reset_gpio, 0);
	return 0;
}

static void nt35950_remove(struct mipi_dsi_device *dsi)
{
	struct nt35950 *nt = mipi_dsi_get_drvdata(dsi);
	int ret;

	ret = mipi_dsi_detach(nt->dsi[0]);
	if (ret < 0)
		dev_err(&dsi->dev,
			"Failed to detach from DSI0 host: %d\n", ret);

	if (nt->dsi[1]) {
		ret = mipi_dsi_detach(nt->dsi[1]);
		if (ret < 0)
			dev_err(&dsi->dev,
				"Failed to detach from DSI1 host: %d\n", ret);
		mipi_dsi_device_unregister(nt->dsi[1]);
	}

	drm_panel_remove(&nt->panel);
}

static const struct nt35950_panel_mode sharp_ls055d1sx04_modes[] = {
	{
		/* 1920x1080 60Hz no compression */
		.mode = {
			.clock = 214537,
			.hdisplay = 1080,
			.hsync_start = 1080 + 400,
			.hsync_end = 1080 + 400 + 40,
			.htotal = 1080 + 400 + 40 + 300,
			.vdisplay = 1920,
			.vsync_start = 1920 + 12,
			.vsync_end = 1920 + 12 + 2,
			.vtotal = 1920 + 12 + 2 + 10,
			.width_mm = 68,
			.height_mm = 121,
		},
		.compression = MCS_DATA_COMPRESSION_NONE,
		.enable_sram = true,
		.is_video_mode = false,
		.scaler_on = 1,
		.scaler_mode = MCS_SCALEUP_DUPLICATE,
	},
	/* TODO: Add 2160x3840 60Hz when DSC is supported */
};

static const struct nt35950_panel_desc sharp_ls055d1sx04 = {
	.model_name = "Sharp LS055D1SX04",
	.dsi_info = {
		.type = "LS055D1SX04",
		.channel = 0,
		.node = NULL,
	},
	.mode_data = sharp_ls055d1sx04_modes,
	.num_modes = ARRAY_SIZE(sharp_ls055d1sx04_modes),
	.is_dual_dsi = true,
	.num_lanes = 4,
};

static const struct of_device_id nt35950_of_match[] = {
	{ .compatible = "sharp,ls055d1sx04", .data = &sharp_ls055d1sx04 },
	{  }
};
MODULE_DEVICE_TABLE(of, nt35950_of_match);

static struct mipi_dsi_driver nt35950_driver = {
	.probe = nt35950_probe,
	.remove = nt35950_remove,
	.driver = {
		.name = "panel-novatek-nt35950",
		.of_match_table = nt35950_of_match,
	},
};
module_mipi_dsi_driver(nt35950_driver);

MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>");
MODULE_DESCRIPTION("Novatek NT35950 DriverIC panels driver");
MODULE_LICENSE("GPL v2");