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// 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;
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),
};
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