Open Menu / drivers / video / samsung-ltl106hl02.c
Loading...
  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
// SPDX-License-Identifier: GPL-2.0+
/*
 * Samsung LTL106HL02-001 DSI panel driver
 *
 * Copyright (c) 2020 Anton Bambura <jenneron@protonmail.com>
 * Copyright (c) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
 * Copyright (c) 2024 Jonas Schwöbel <jonasschwoebel@yahoo.de>
 */

#include <backlight.h>
#include <dm.h>
#include <panel.h>
#include <log.h>
#include <mipi_dsi.h>
#include <asm/gpio.h>
#include <linux/delay.h>
#include <power/regulator.h>

struct samsung_ltl106hl02_priv {
	struct udevice *vdd;
	struct udevice *backlight;

	struct gpio_desc reset_gpio;
};

static struct display_timing default_timing = {
	.pixelclock.typ		= 137000000,
	.hactive.typ		= 1920,
	.hfront_porch.typ	= 32,
	.hback_porch.typ	= 64,
	.hsync_len.typ		= 32,
	.vactive.typ		= 1080,
	.vfront_porch.typ	= 2,
	.vback_porch.typ	= 26,
	.vsync_len.typ		= 3,
};

static int samsung_ltl106hl02_enable_backlight(struct udevice *dev)
{
	struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
	struct mipi_dsi_device *dsi = plat->device;
	int ret;

	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
	if (ret < 0) {
		log_debug("%s: failed to exit sleep mode: %d\n",
			  __func__, ret);
		return ret;
	}
	mdelay(70);

	ret = mipi_dsi_dcs_set_display_on(dsi);
	if (ret < 0) {
		log_debug("%s: failed to enable display: %d\n",
			  __func__, ret);
		return ret;
	}
	mdelay(5);

	return 0;
}

static int samsung_ltl106hl02_set_backlight(struct udevice *dev, int percent)
{
	struct samsung_ltl106hl02_priv *priv = dev_get_priv(dev);
	int ret;

	ret = backlight_enable(priv->backlight);
	if (ret)
		return ret;

	return backlight_set_brightness(priv->backlight, percent);
}

static int samsung_ltl106hl02_timings(struct udevice *dev,
				      struct display_timing *timing)
{
	memcpy(timing, &default_timing, sizeof(*timing));
	return 0;
}

static int samsung_ltl106hl02_of_to_plat(struct udevice *dev)
{
	struct samsung_ltl106hl02_priv *priv = dev_get_priv(dev);
	int ret;

	ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
					   "backlight", &priv->backlight);
	if (ret) {
		log_debug("%s: cannot get backlight: ret = %d\n",
			  __func__, ret);
		return ret;
	}

	ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
					   "vdd-supply", &priv->vdd);
	if (ret)
		log_debug("%s: cannot get vdd-supply: error %d\n",
			  __func__, ret);

	ret = gpio_request_by_name(dev, "reset-gpios", 0,
				   &priv->reset_gpio, GPIOD_IS_OUT);
	if (ret)
		log_debug("%s: cannot get reset-gpios: error %d\n",
			  __func__, ret);

	return 0;
}

static int samsung_ltl106hl02_hw_init(struct udevice *dev)
{
	struct samsung_ltl106hl02_priv *priv = dev_get_priv(dev);

	dm_gpio_set_value(&priv->reset_gpio, 1);
	regulator_set_enable_if_allowed(priv->vdd, 1);

	/* Dataheets states at least 8.5 msec for vdd stabilization */
	mdelay(10);

	dm_gpio_set_value(&priv->reset_gpio, 0);

	return 0;
}

static int samsung_ltl106hl02_probe(struct udevice *dev)
{
	struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);

	/* fill characteristics of DSI data link */
	plat->lanes = 4;
	plat->format = MIPI_DSI_FMT_RGB888;
	plat->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM;

	return samsung_ltl106hl02_hw_init(dev);
}

static const struct panel_ops samsung_ltl106hl02_ops = {
	.enable_backlight	= samsung_ltl106hl02_enable_backlight,
	.set_backlight		= samsung_ltl106hl02_set_backlight,
	.get_display_timing	= samsung_ltl106hl02_timings,
};

static const struct udevice_id samsung_ltl106hl02_ids[] = {
	{ .compatible = "samsung,ltl106hl02-001" },
	{ }
};

U_BOOT_DRIVER(samsung_ltl106hl02) = {
	.name		= "samsung_ltl106hl02",
	.id		= UCLASS_PANEL,
	.of_match	= samsung_ltl106hl02_ids,
	.ops		= &samsung_ltl106hl02_ops,
	.of_to_plat	= samsung_ltl106hl02_of_to_plat,
	.probe		= samsung_ltl106hl02_probe,
	.plat_auto	= sizeof(struct mipi_dsi_panel_plat),
	.priv_auto	= sizeof(struct samsung_ltl106hl02_priv),
};