[PATCH v2 1/7] video: panel: add LG LG070WX3 MIPI DSI panel driver
Svyatoslav Ryhel
clamor95 at gmail.com
Wed Jan 31 07:57:15 CET 2024
The LD070WX3 is a Color Active Matrix Liquid Crystal Display with
an integral Light Emitting Diode (LED) backlight system. The
matrix employs a-Si Thin Film Transistor as the active element. It
is a transmissive type display operating in the normally Black
mode. This TFT-LCD has 7.0 inches diagonally measured active
display area with WXGA resolution (800 by 1280 pixel array).
Signed-off-by: Svyatoslav Ryhel <clamor95 at gmail.com>
---
drivers/video/Kconfig | 8 ++
drivers/video/Makefile | 1 +
drivers/video/lg-ld070wx3.c | 186 ++++++++++++++++++++++++++++++++++++
3 files changed, 195 insertions(+)
create mode 100644 drivers/video/lg-ld070wx3.c
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index e2016d73d1..05567a0095 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -522,6 +522,14 @@ config VIDEO_LCD_ORISETECH_OTM8009A
Say Y here if you want to enable support for Orise Technology
otm8009a 480x800 dsi 2dl panel.
+config VIDEO_LCD_LG_LD070WX3
+ bool "LD070WX3 DSI LCD panel support"
+ depends on PANEL && BACKLIGHT
+ select VIDEO_MIPI_DSI
+ help
+ Say Y here if you want to enable support for LG LD070WX3
+ 800x1280 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 fdc2937632..bb6d9b74b9 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -58,6 +58,7 @@ obj-$(CONFIG_VIDEO_LCD_ANX9804) += anx9804.o
obj-$(CONFIG_VIDEO_LCD_ENDEAVORU) += endeavoru-panel.o
obj-$(CONFIG_VIDEO_LCD_HIMAX_HX8394) += himax-hx8394.o
obj-$(CONFIG_VIDEO_LCD_HITACHI_TX18D42VM) += hitachi_tx18d42vm_lcd.o
+obj-$(CONFIG_VIDEO_LCD_LG_LD070WX3) += lg-ld070wx3.o
obj-$(CONFIG_VIDEO_LCD_ORISETECH_OTM8009A) += orisetech_otm8009a.o
obj-$(CONFIG_VIDEO_LCD_RAYDIUM_RM68200) += raydium-rm68200.o
obj-$(CONFIG_VIDEO_LCD_RENESAS_R61307) += renesas-r61307.o
diff --git a/drivers/video/lg-ld070wx3.c b/drivers/video/lg-ld070wx3.c
new file mode 100644
index 0000000000..610a06ffe7
--- /dev/null
+++ b/drivers/video/lg-ld070wx3.c
@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * LG LD070WX3-SL01 DSI panel driver
+ *
+ * Copyright (c) 2023 Svyatoslav Ryhel <clamor95 at 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>
+
+struct lg_ld070wx3_priv {
+ struct udevice *vdd;
+ struct udevice *vcc;
+
+ struct udevice *backlight;
+};
+
+static struct display_timing default_timing = {
+ .pixelclock.typ = 70000000,
+ .hactive.typ = 800,
+ .hfront_porch.typ = 32,
+ .hback_porch.typ = 48,
+ .hsync_len.typ = 8,
+ .vactive.typ = 1280,
+ .vfront_porch.typ = 5,
+ .vback_porch.typ = 3,
+ .vsync_len.typ = 1,
+};
+
+static void dcs_write_one(struct mipi_dsi_device *dsi, u8 cmd, u8 data)
+{
+ mipi_dsi_dcs_write(dsi, cmd, &data, 1);
+}
+
+static int lg_ld070wx3_enable_backlight(struct udevice *dev)
+{
+ struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
+ struct mipi_dsi_device *dsi = plat->device;
+ int ret;
+
+ ret = mipi_dsi_dcs_soft_reset(dsi);
+ if (ret < 0) {
+ log_debug("%s: failed to soft reset panel: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /* Delay before sending new command after soft reset */
+ mdelay(20);
+
+ /* Differential input impedance selection */
+ dcs_write_one(dsi, 0xAE, 0x0B);
+
+ /* Enter test mode 1 and 2*/
+ dcs_write_one(dsi, 0xEE, 0xEA);
+ dcs_write_one(dsi, 0xEF, 0x5F);
+
+ /* Increased MIPI CLK driving ability */
+ dcs_write_one(dsi, 0xF2, 0x68);
+
+ /* Exit test mode 1 and 2 */
+ dcs_write_one(dsi, 0xEE, 0x00);
+ dcs_write_one(dsi, 0xEF, 0x00);
+
+ return 0;
+}
+
+static int lg_ld070wx3_set_backlight(struct udevice *dev, int percent)
+{
+ struct lg_ld070wx3_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_ld070wx3_timings(struct udevice *dev,
+ struct display_timing *timing)
+{
+ memcpy(timing, &default_timing, sizeof(*timing));
+ return 0;
+}
+
+static int lg_ld070wx3_of_to_plat(struct udevice *dev)
+{
+ struct lg_ld070wx3_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 = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
+ "vdd-supply", &priv->vdd);
+ if (ret) {
+ log_debug("%s: cannot get vdd-supply: ret = %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
+ "vcc-supply", &priv->vcc);
+ if (ret) {
+ log_debug("%s: cannot get vcc-supply: ret = %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lg_ld070wx3_hw_init(struct udevice *dev)
+{
+ struct lg_ld070wx3_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = regulator_set_enable_if_allowed(priv->vcc, 1);
+ if (ret) {
+ log_debug("%s: enabling vcc-supply failed (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = regulator_set_enable_if_allowed(priv->vdd, 1);
+ if (ret) {
+ log_debug("%s: enabling vdd-supply failed (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /*
+ * According to spec delay between enabling supply is 0,
+ * for regulators to reach required voltage ~5ms needed.
+ * MIPI interface signal for setup requires additional
+ * 110ms which in total results in 115ms.
+ */
+ mdelay(115);
+
+ return 0;
+}
+
+static int lg_ld070wx3_probe(struct udevice *dev)
+{
+ struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
+
+ /* fill characteristics of DSI data link */
+ plat->lanes = 4;
+ plat->format = MIPI_DSI_FMT_RGB888;
+ plat->mode_flags = MIPI_DSI_MODE_VIDEO;
+
+ return lg_ld070wx3_hw_init(dev);
+}
+
+static const struct panel_ops lg_ld070wx3_ops = {
+ .enable_backlight = lg_ld070wx3_enable_backlight,
+ .set_backlight = lg_ld070wx3_set_backlight,
+ .get_display_timing = lg_ld070wx3_timings,
+};
+
+static const struct udevice_id lg_ld070wx3_ids[] = {
+ { .compatible = "lg,ld070wx3-sl01" },
+ { }
+};
+
+U_BOOT_DRIVER(lg_ld070wx3) = {
+ .name = "lg_ld070wx3",
+ .id = UCLASS_PANEL,
+ .of_match = lg_ld070wx3_ids,
+ .ops = &lg_ld070wx3_ops,
+ .of_to_plat = lg_ld070wx3_of_to_plat,
+ .probe = lg_ld070wx3_probe,
+ .plat_auto = sizeof(struct mipi_dsi_panel_plat),
+ .priv_auto = sizeof(struct lg_ld070wx3_priv),
+};
--
2.40.1
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