LG LH400WV3-SD04 is a color active matrix TFT (Thin Film Transistor)
liquid crystal display (LCD). The resolution of a 4" contains 480 x 800
pixels.
Signed-off-by: Svyatoslav Ryhel <clamo...@gmail.com>
---
drivers/video/Kconfig | 8 ++
drivers/video/Makefile | 1 +
drivers/video/lg-lh400wv3-sd04.c | 230 +++++++++++++++++++++++++++++++
3 files changed, 239 insertions(+)
create mode 100644 drivers/video/lg-lh400wv3-sd04.c
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index c2f6a72af42..3551aefae89 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -554,6 +554,14 @@ config VIDEO_LCD_LG_LD070WX3
Say Y here if you want to enable support for LG LD070WX3
800x1280 DSI video mode panel.
+config VIDEO_LCD_LG_LH400WV3
+ bool "LH400WV3-SD04 DSI LCD panel support"
+ depends on PANEL && BACKLIGHT
+ select VIDEO_MIPI_DSI
+ help
+ Say Y here if you want to enable support for LG LH400WV3
+ 480x800 DSI video mode panel.
+
config VIDEO_LCD_RAYDIUM_RM68200
bool "RM68200 DSI LCD panel support"
select VIDEO_MIPI_DSI
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 914ae885b70..ccd791cac59 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_VIDEO_LCD_HIMAX_HX8394) += himax-hx8394.o
obj-$(CONFIG_VIDEO_LCD_HITACHI_TX10D07VM0BAA) += hitachi-tx10d07vm0baa.o
obj-$(CONFIG_VIDEO_LCD_HITACHI_TX18D42VM) += hitachi_tx18d42vm_lcd.o
obj-$(CONFIG_VIDEO_LCD_LG_LD070WX3) += lg-ld070wx3.o
+obj-$(CONFIG_VIDEO_LCD_LG_LH400WV3) += lg-lh400wv3-sd04.o
obj-$(CONFIG_VIDEO_LCD_MOT) += mot-panel.o
obj-$(CONFIG_VIDEO_LCD_ORISETECH_OTM8009A) += orisetech_otm8009a.o
obj-$(CONFIG_VIDEO_LCD_RAYDIUM_RM68200) += raydium-rm68200.o
diff --git a/drivers/video/lg-lh400wv3-sd04.c b/drivers/video/lg-lh400wv3-sd04.c
new file mode 100644
index 00000000000..0385b39867f
--- /dev/null
+++ b/drivers/video/lg-lh400wv3-sd04.c
@@ -0,0 +1,230 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * LG LH400WV3-SD04 DSI panel driver
+ *
+ * Copyright (c) 2025 Svyatoslav Ryhel <clamo...@gmail.com>
+ */
+
+#include <backlight.h>
+#include <dm.h>
+#include <panel.h>
+#include <log.h>
+#include <mipi_dsi.h>
+#include <linux/delay.h>
+#include <power/regulator.h>
+#include <asm/gpio.h>
+
+struct lg_lh400wv3_priv {
+ struct udevice *avci;
+ struct udevice *iovcc;
+
+ struct udevice *backlight;
+
+ struct gpio_desc reset_gpio;
+};
+
+static struct display_timing default_timing = {
+ .pixelclock.typ = 29816000,
+ .hactive.typ = 480,
+ .hfront_porch.typ = 10,
+ .hback_porch.typ = 10,
+ .hsync_len.typ = 10,
+ .vactive.typ = 800,
+ .vfront_porch.typ = 4,
+ .vback_porch.typ = 4,
+ .vsync_len.typ = 4,
+};
+
+#define dsi_generic_write_seq(dsi, cmd, seq...) do { \
+ static const u8 b[] = { cmd, seq }; \
+ int ret; \
+ ret = mipi_dsi_dcs_write_buffer(dsi, b, ARRAY_SIZE(b)); \
+ if (ret < 0) \
+ return ret; \
+ } while (0)
+
+static int lg_lh400wv3_enable_backlight(struct udevice *dev)
+{
+ struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
+ struct mipi_dsi_device *dsi = plat->device;
+ int ret;
+
+ dsi_generic_write_seq(dsi, MIPI_DCS_EXIT_INVERT_MODE);
+ dsi_generic_write_seq(dsi, MIPI_DCS_SET_TEAR_ON);
+
+ ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
+ MIPI_DCS_PIXEL_FMT_24BIT << 4);
+ if (ret < 0) {
+ log_debug("%s: failed to set pixel format: %d\n", __func__,
ret);
+ return ret;
+ }
+
+ dsi_generic_write_seq(dsi, 0xb2, 0x00, 0xc8);
+ dsi_generic_write_seq(dsi, 0xb3, 0x00);
+ dsi_generic_write_seq(dsi, 0xb4, 0x04);
+ dsi_generic_write_seq(dsi, 0xb5, 0x42, 0x10, 0x10, 0x00, 0x20);
+ dsi_generic_write_seq(dsi, 0xb6, 0x0b, 0x0f, 0x3c, 0x13, 0x13, 0xe8);
+ dsi_generic_write_seq(dsi, 0xb7, 0x4c, 0x06, 0x0c, 0x00, 0x00);
+
+ dsi_generic_write_seq(dsi, 0xc0, 0x01, 0x11);
+ dsi_generic_write_seq(dsi, 0xc3, 0x07, 0x03, 0x04, 0x04, 0x04);
+ dsi_generic_write_seq(dsi, 0xc4, 0x12, 0x24, 0x18, 0x18, 0x02, 0x49);
+ dsi_generic_write_seq(dsi, 0xc5, 0x65);
+ dsi_generic_write_seq(dsi, 0xc6, 0x41, 0x63);
+
+ dsi_generic_write_seq(dsi, 0xd0, 0x00, 0x46, 0x74, 0x32, 0x1d, 0x03,
0x51, 0x15, 0x04);
+ dsi_generic_write_seq(dsi, 0xd1, 0x00, 0x46, 0x74, 0x32, 0x1d, 0x03,
0x51, 0x15, 0x04);
+ dsi_generic_write_seq(dsi, 0xd2, 0x00, 0x46, 0x74, 0x32, 0x1f, 0x03,
0x51, 0x15, 0x04);
+ dsi_generic_write_seq(dsi, 0xd3, 0x00, 0x46, 0x74, 0x32, 0x1f, 0x03,
0x51, 0x15, 0x04);
+ dsi_generic_write_seq(dsi, 0xd4, 0x01, 0x46, 0x74, 0x25, 0x00, 0x03,
0x51, 0x15, 0x04);
+ dsi_generic_write_seq(dsi, 0xd5, 0x01, 0x46, 0x74, 0x25, 0x00, 0x03,
0x51, 0x15, 0x04);
+
+ dsi_generic_write_seq(dsi, MIPI_DCS_SET_COLUMN_ADDRESS, 0x00, 0x00,
0x01, 0xdf);
+ dsi_generic_write_seq(dsi, MIPI_DCS_SET_PAGE_ADDRESS, 0x00, 0x00, 0x03,
0x1f);
+
+ 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(120);
+
+ dsi_generic_write_seq(dsi, MIPI_DCS_WRITE_MEMORY_START);
+
+ ret = mipi_dsi_dcs_set_display_on(dsi);
+ if (ret < 0) {
+ log_debug("%s: failed to set display on: %d\n", __func__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lg_lh400wv3_set_backlight(struct udevice *dev, int percent)
+{
+ struct lg_lh400wv3_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 lg_lh400wv3_timings(struct udevice *dev, struct display_timing
*timing)
+{
+ memcpy(timing, &default_timing, sizeof(*timing));
+ return 0;
+}
+
+static int lg_lh400wv3_of_to_plat(struct udevice *dev)
+{
+ struct lg_lh400wv3_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 = device_get_supply_regulator(dev, "avci-supply", &priv->avci);
+ if (ret) {
+ log_debug("%s: cannot get avci-supply: ret = %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = device_get_supply_regulator(dev, "iovcc-supply", &priv->iovcc);
+ if (ret) {
+ log_debug("%s: cannot get iovcc-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 lg_lh400wv3_hw_init(struct udevice *dev)
+{
+ struct lg_lh400wv3_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->iovcc, 1);
+ if (ret) {
+ log_debug("%s: enabling iovcc-supply failed (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = regulator_set_enable_if_allowed(priv->avci, 1);
+ if (ret) {
+ log_debug("%s: enabling avci-supply failed (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ mdelay(1);
+
+ ret = dm_gpio_set_value(&priv->reset_gpio, 0);
+ if (ret) {
+ log_debug("%s: error exiting reset (%d)\n", __func__, ret);
+ return ret;
+ }
+
+ mdelay(10);
+
+ return 0;
+}
+
+static int lg_lh400wv3_probe(struct udevice *dev)
+{
+ struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
+
+ /* fill characteristics of DSI data link */
+ plat->lanes = 2;
+ plat->format = MIPI_DSI_FMT_RGB888;
+ plat->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM;
+
+ return lg_lh400wv3_hw_init(dev);
+}
+
+static const struct panel_ops lg_lh400wv3_ops = {
+ .enable_backlight = lg_lh400wv3_enable_backlight,
+ .set_backlight = lg_lh400wv3_set_backlight,
+ .get_display_timing = lg_lh400wv3_timings,
+};
+
+static const struct udevice_id lg_lh400wv3_ids[] = {
+ { .compatible = "lg,lh400wv3-sd04" },
+ { }
+};
+
+U_BOOT_DRIVER(lg_lh400wv3) = {
+ .name = "lg_lh400wv3",
+ .id = UCLASS_PANEL,
+ .of_match = lg_lh400wv3_ids,
+ .ops = &lg_lh400wv3_ops,
+ .of_to_plat = lg_lh400wv3_of_to_plat,
+ .probe = lg_lh400wv3_probe,
+ .plat_auto = sizeof(struct mipi_dsi_panel_plat),
+ .priv_auto = sizeof(struct lg_lh400wv3_priv),
+};
--
2.43.0
