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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2025 Ion Agorria <[email protected]>
*/
#include <backlight.h>
#include <dm.h>
#include <panel.h>
#include <log.h>
#include <spi.h>
#include <mipi_display.h>
#include <linux/delay.h>
#include <power/regulator.h>
#include <asm/gpio.h>
#define SONY_L4F00430T01_DCS_CMD 0
#define SONY_L4F00430T01_DCS_DATA 1
struct sony_l4f00430t01_priv {
struct udevice *vdd1v8;
struct udevice *vdd3v0;
struct udevice *backlight;
struct gpio_desc reset_gpio;
};
static struct display_timing default_timing = {
.pixelclock.typ = 24000000,
.hactive.typ = 480,
.hfront_porch.typ = 10,
.hback_porch.typ = 20,
.hsync_len.typ = 10,
.vactive.typ = 800,
.vfront_porch.typ = 3,
.vback_porch.typ = 4,
.vsync_len.typ = 2,
.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_NEGEDGE,
};
static int sony_l4f00430t01_write(struct udevice *dev, u8 cmd, const u8 *seq, int len)
{
u8 data[2];
int i, ret;
data[0] = SONY_L4F00430T01_DCS_CMD;
data[1] = cmd;
ret = dm_spi_xfer(dev, 9, &data, NULL, SPI_XFER_ONCE);
if (ret)
return ret;
for (i = 0; i < len; i++) {
data[0] = SONY_L4F00430T01_DCS_DATA;
data[1] = seq[i];
ret = dm_spi_xfer(dev, 9, &data, NULL, SPI_XFER_ONCE);
if (ret)
return ret;
}
return 0;
}
#define sony_l4f00430t01_write_seq(dev, cmd, seq...) do { \
static const u8 b[] = { seq }; \
sony_l4f00430t01_write(dev, cmd, b, ARRAY_SIZE(b)); \
} while (0)
static int sony_l4f00430t01_enable_backlight(struct udevice *dev)
{
sony_l4f00430t01_write_seq(dev, MIPI_DCS_SET_ADDRESS_MODE, 0xd4);
mdelay(25);
sony_l4f00430t01_write_seq(dev, MIPI_DCS_EXIT_SLEEP_MODE);
mdelay(150);
sony_l4f00430t01_write_seq(dev, MIPI_DCS_SET_DISPLAY_ON);
return 0;
}
static int sony_l4f00430t01_set_backlight(struct udevice *dev, int percent)
{
struct sony_l4f00430t01_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 = backlight_enable(priv->backlight);
if (ret)
return ret;
return backlight_set_brightness(priv->backlight, percent);
}
static int sony_l4f00430t01_get_display_timing(struct udevice *dev,
struct display_timing *timing)
{
memcpy(timing, &default_timing, sizeof(*timing));
return 0;
}
static int sony_l4f00430t01_of_to_plat(struct udevice *dev)
{
struct sony_l4f00430t01_priv *priv = dev_get_priv(dev);
int ret;
ret = device_get_supply_regulator(dev, "vdd1v8-supply", &priv->vdd1v8);
if (ret) {
log_debug("%s: cannot get vdd1v8-supply: ret = %d\n",
__func__, ret);
return ret;
}
ret = device_get_supply_regulator(dev, "vdd3v0-supply", &priv->vdd3v0);
if (ret) {
log_debug("%s: cannot get vdd3v0-supply: ret = %d\n",
__func__, ret);
return ret;
}
ret = gpio_request_by_name(dev, "reset-gpios", 0,
&priv->reset_gpio, GPIOD_IS_OUT);
if (ret) {
log_debug("%s: cannot decode reset-gpios (%d)\n",
__func__, ret);
return ret;
}
return 0;
}
static int sony_l4f00430t01_hw_init(struct udevice *dev)
{
struct sony_l4f00430t01_priv *priv = dev_get_priv(dev);
int ret;
ret = dm_gpio_set_value(&priv->reset_gpio, 1);
if (ret) {
log_debug("%s: error entering reset (%d)\n", __func__, ret);
return ret;
}
ret = regulator_set_enable_if_allowed(priv->vdd1v8, 1);
if (ret) {
log_debug("%s: enabling vdd1v8-supply failed (%d)\n",
__func__, ret);
return ret;
}
ret = regulator_set_enable_if_allowed(priv->vdd3v0, 1);
if (ret) {
log_debug("%s: enabling vdd3v0-supply failed (%d)\n",
__func__, ret);
return ret;
}
mdelay(15);
ret = dm_gpio_set_value(&priv->reset_gpio, 0);
if (ret) {
log_debug("%s: error exiting reset (%d)\n", __func__, ret);
return ret;
}
mdelay(100);
return 0;
}
static int sony_l4f00430t01_probe(struct udevice *dev)
{
struct spi_slave *slave = dev_get_parent_priv(dev);
int ret;
ret = spi_claim_bus(slave);
if (ret) {
log_err("SPI bus allocation failed (%d)\n", ret);
return ret;
}
return sony_l4f00430t01_hw_init(dev);
}
static const struct panel_ops sony_l4f00430t01_ops = {
.enable_backlight = sony_l4f00430t01_enable_backlight,
.set_backlight = sony_l4f00430t01_set_backlight,
.get_display_timing = sony_l4f00430t01_get_display_timing,
};
static const struct udevice_id sony_l4f00430t01_ids[] = {
{ .compatible = "sony,l4f00430t01" },
{ }
};
U_BOOT_DRIVER(sony_l4f00430t01) = {
.name = "sony_l4f00430t01",
.id = UCLASS_PANEL,
.of_match = sony_l4f00430t01_ids,
.ops = &sony_l4f00430t01_ops,
.of_to_plat = sony_l4f00430t01_of_to_plat,
.probe = sony_l4f00430t01_probe,
.priv_auto = sizeof(struct sony_l4f00430t01_priv),
};
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