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/*
* LCD: LG4573, TFT 4.3", 480x800, RGB24
* LCD initialization via SPI
*
* SPDX-License-Identifier: GPL-2.0
*
*/
#include <common.h>
#include <errno.h>
#include <spi.h>
#define PWR_ON_DELAY_MSECS 120
static int lb043wv_spi_write_u16(struct spi_slave *spi, u16 val)
{
unsigned long flags = SPI_XFER_BEGIN;
unsigned short buf16 = htons(val);
int ret = 0;
flags |= SPI_XFER_END;
ret = spi_xfer(spi, 16, &buf16, NULL, flags);
if (ret)
debug("%s: Failed to send: %d\n", __func__, ret);
return ret;
}
static void lb043wv_spi_write_u16_array(struct spi_slave *spi, u16 *buff,
int size)
{
int i;
for (i = 0; i < size; i++)
lb043wv_spi_write_u16(spi, buff[i]);
}
static void lb043wv_display_mode_settings(struct spi_slave *spi)
{
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(spi, display_mode_settings,
ARRAY_SIZE(display_mode_settings));
}
static void lb043wv_power_settings(struct spi_slave *spi)
{
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(spi, power_settings,
ARRAY_SIZE(power_settings));
}
static void lb043wv_gamma_settings(struct spi_slave *spi)
{
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(spi, gamma_settings,
ARRAY_SIZE(gamma_settings));
}
static void lb043wv_display_on(struct spi_slave *spi)
{
static u16 sleep_out = 0x7011;
static u16 display_on = 0x7029;
lb043wv_spi_write_u16(spi, sleep_out);
mdelay(PWR_ON_DELAY_MSECS);
lb043wv_spi_write_u16(spi, display_on);
}
int lg4573_spi_startup(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode)
{
struct spi_slave *spi;
int ret;
spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
if (!spi) {
debug("%s: Failed to set up slave\n", __func__);
return -1;
}
ret = spi_claim_bus(spi);
if (ret) {
debug("%s: Failed to claim SPI bus: %d\n", __func__, ret);
goto err_claim_bus;
}
lb043wv_display_mode_settings(spi);
lb043wv_power_settings(spi);
lb043wv_gamma_settings(spi);
lb043wv_display_on(spi);
return 0;
err_claim_bus:
spi_free_slave(spi);
return -1;
}
static int do_lgset(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
lg4573_spi_startup(0, 0, 10000000, SPI_MODE_0);
return 0;
}
U_BOOT_CMD(
lgset, 2, 1, do_lgset,
"set lgdisplay",
""
);
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