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// SPDX-License-Identifier: GPL-2.0
/*
* LCD: LG4573, TFT 4.3", 480x800, RGB24
* LCD initialization via SPI
*
*/
#include <common.h>
#include <backlight.h>
#include <command.h>
#include <display.h>
#include <dm.h>
#include <dm/read.h>
#include <dm/uclass-internal.h>
#include <errno.h>
#include <spi.h>
#include <asm/gpio.h>
#define PWR_ON_DELAY_MSECS 120
static int lb043wv_spi_write_u16(struct spi_slave *slave, u16 val)
{
unsigned short buf16 = htons(val);
int ret = 0;
ret = spi_xfer(slave, 16, &buf16, NULL,
SPI_XFER_BEGIN | SPI_XFER_END);
if (ret)
debug("%s: Failed to send: %d\n", __func__, ret);
return ret;
}
static void lb043wv_spi_write_u16_array(struct spi_slave *slave, u16 *buff,
int size)
{
int i;
for (i = 0; i < size; i++)
lb043wv_spi_write_u16(slave, buff[i]);
}
static void lb043wv_display_mode_settings(struct spi_slave *slave)
{
static u16 display_mode_settings[] = {
0x703A,
0x7270,
0x70B1,
0x7208,
0x723B,
0x720F,
0x70B2,
0x7200,
0x72C8,
0x70B3,
0x7200,
0x70B4,
0x7200,
0x70B5,
0x7242,
0x7210,
0x7210,
0x7200,
0x7220,
0x70B6,
0x720B,
0x720F,
0x723C,
0x7213,
0x7213,
0x72E8,
0x70B7,
0x7246,
0x7206,
0x720C,
0x7200,
0x7200,
};
debug("transfer display mode settings\n");
lb043wv_spi_write_u16_array(slave, display_mode_settings,
ARRAY_SIZE(display_mode_settings));
}
static void lb043wv_power_settings(struct spi_slave *slave)
{
static u16 power_settings[] = {
0x70C0,
0x7201,
0x7211,
0x70C3,
0x7207,
0x7203,
0x7204,
0x7204,
0x7204,
0x70C4,
0x7212,
0x7224,
0x7218,
0x7218,
0x7202,
0x7249,
0x70C5,
0x726F,
0x70C6,
0x7241,
0x7263,
};
debug("transfer power settings\n");
lb043wv_spi_write_u16_array(slave, power_settings,
ARRAY_SIZE(power_settings));
}
static void lb043wv_gamma_settings(struct spi_slave *slave)
{
static u16 gamma_settings[] = {
0x70D0,
0x7203,
0x7207,
0x7273,
0x7235,
0x7200,
0x7201,
0x7220,
0x7200,
0x7203,
0x70D1,
0x7203,
0x7207,
0x7273,
0x7235,
0x7200,
0x7201,
0x7220,
0x7200,
0x7203,
0x70D2,
0x7203,
0x7207,
0x7273,
0x7235,
0x7200,
0x7201,
0x7220,
0x7200,
0x7203,
0x70D3,
0x7203,
0x7207,
0x7273,
0x7235,
0x7200,
0x7201,
0x7220,
0x7200,
0x7203,
0x70D4,
0x7203,
0x7207,
0x7273,
0x7235,
0x7200,
0x7201,
0x7220,
0x7200,
0x7203,
0x70D5,
0x7203,
0x7207,
0x7273,
0x7235,
0x7200,
0x7201,
0x7220,
0x7200,
0x7203,
};
debug("transfer gamma settings\n");
lb043wv_spi_write_u16_array(slave, gamma_settings,
ARRAY_SIZE(gamma_settings));
}
static void lb043wv_display_on(struct spi_slave *slave)
{
static u16 sleep_out = 0x7011;
static u16 display_on = 0x7029;
lb043wv_spi_write_u16(slave, sleep_out);
mdelay(PWR_ON_DELAY_MSECS);
lb043wv_spi_write_u16(slave, display_on);
}
static int lg4573_spi_startup(struct spi_slave *slave)
{
int ret;
ret = spi_claim_bus(slave);
if (ret)
return ret;
lb043wv_display_mode_settings(slave);
lb043wv_power_settings(slave);
lb043wv_gamma_settings(slave);
lb043wv_display_on(slave);
spi_release_bus(slave);
return 0;
}
static int do_lgset(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct spi_slave *slave;
struct udevice *dev;
int ret;
ret = uclass_get_device_by_driver(UCLASS_DISPLAY,
DM_GET_DRIVER(lg4573_lcd), &dev);
if (ret) {
printf("%s: Could not get lg4573 device\n", __func__);
return ret;
}
slave = dev_get_parent_priv(dev);
if (!slave) {
printf("%s: No slave data\n", __func__);
return -ENODEV;
}
lg4573_spi_startup(slave);
return 0;
}
U_BOOT_CMD(
lgset, 2, 1, do_lgset,
"set lgdisplay",
""
);
static int lg4573_bind(struct udevice *dev)
{
return 0;
}
static int lg4573_probe(struct udevice *dev)
{
return 0;
}
static const struct udevice_id lg4573_ids[] = {
{ .compatible = "lg,lg4573" },
{ }
};
struct lg4573_lcd_priv {
struct display_timing timing;
struct udevice *backlight;
struct gpio_desc enable;
int panel_bpp;
u32 power_on_delay;
};
static int lg4573_lcd_read_timing(struct udevice *dev,
struct display_timing *timing)
{
struct lg4573_lcd_priv *priv = dev_get_priv(dev);
memcpy(timing, &priv->timing, sizeof(struct display_timing));
return 0;
}
static int lg4573_lcd_enable(struct udevice *dev, int bpp,
const struct display_timing *edid)
{
struct spi_slave *slave = dev_get_parent_priv(dev);
struct lg4573_lcd_priv *priv = dev_get_priv(dev);
int ret = 0;
dm_gpio_set_value(&priv->enable, 1);
ret = backlight_enable(priv->backlight);
mdelay(priv->power_on_delay);
lg4573_spi_startup(slave);
return ret;
};
static const struct dm_display_ops lg4573_lcd_ops = {
.read_timing = lg4573_lcd_read_timing,
.enable = lg4573_lcd_enable,
};
static int lg4573_ofdata_to_platdata(struct udevice *dev)
{
struct lg4573_lcd_priv *priv = dev_get_priv(dev);
int ret;
ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
"backlight", &priv->backlight);
if (ret) {
debug("%s: Cannot get backlight: ret=%d\n", __func__, ret);
return log_ret(ret);
}
ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable,
GPIOD_IS_OUT);
if (ret) {
debug("%s: Warning: cannot get enable GPIO: ret=%d\n",
__func__, ret);
if (ret != -ENOENT)
return log_ret(ret);
}
priv->power_on_delay = dev_read_u32_default(dev, "power-on-delay", 10);
return 0;
}
U_BOOT_DRIVER(lg4573_lcd) = {
.name = "lg4573",
.id = UCLASS_DISPLAY,
.ops = &lg4573_lcd_ops,
.ofdata_to_platdata = lg4573_ofdata_to_platdata,
.of_match = lg4573_ids,
.bind = lg4573_bind,
.probe = lg4573_probe,
.priv_auto_alloc_size = sizeof(struct lg4573_lcd_priv),
};
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