diff options
Diffstat (limited to 'roms/u-boot/drivers/video/lg4573.c')
| -rw-r--r-- | roms/u-boot/drivers/video/lg4573.c | 331 |
1 files changed, 331 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/video/lg4573.c b/roms/u-boot/drivers/video/lg4573.c new file mode 100644 index 000000000..dd87fc461 --- /dev/null +++ b/roms/u-boot/drivers/video/lg4573.c @@ -0,0 +1,331 @@ +// 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 <log.h> +#include <dm/read.h> +#include <dm/uclass-internal.h> +#include <errno.h> +#include <spi.h> +#include <asm/gpio.h> +#include <linux/delay.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_DRIVER_GET(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_of_to_plat(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, + .of_to_plat = lg4573_of_to_plat, + .of_match = lg4573_ids, + .bind = lg4573_bind, + .probe = lg4573_probe, + .priv_auto = sizeof(struct lg4573_lcd_priv), +}; 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