On 2/21/26 10:42, Dario Binacchi wrote:
> Add support for the Rocktech RK050HR345-CT106A RGB panel. This model
> uses an Ilitek ILI9806E controller over the SPI bus for initialization
> and register configuration only.
>
> The driver is designed to be easily extensible to support other panels
> with different sequences and timings by providing a specific descriptor
> structure for each model.
>
> Signed-off-by: Dario Binacchi <[email protected]>
> ---
>
> Changes in v2:
> - Rplace tristate with bool in drivers/video/Kconfig
>
> drivers/video/Kconfig | 8 +
> drivers/video/Makefile | 1 +
> drivers/video/ilitek-ili9806e.c | 354 ++++++++++++++++++++++++++++++++
> 3 files changed, 363 insertions(+)
> create mode 100644 drivers/video/ilitek-ili9806e.c
>
> diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
> index 08c9b0207884..c2acc13139c0 100644
> --- a/drivers/video/Kconfig
> +++ b/drivers/video/Kconfig
> @@ -552,6 +552,14 @@ config VIDEO_LCD_HIMAX_HX8394
> Say Y here if you want to enable support for Himax HX8394
> dsi 4dl panel.
>
> +config VIDEO_LCD_ILITEK_ILI9806E
> + bool "Ilitek ILI9806E-based panels"
> + depends on PANEL && BACKLIGHT
> + help
> + Say Y here if you want to enable support for panels base on
> + the Ilitek ILI9806E controller. Currently only the DBI panel
> + is implemented.
> +
> config VIDEO_LCD_MOT
> tristate "Atrix 4G and Droid X2 540x960 DSI video mode panel"
> depends on PANEL && BACKLIGHT
> diff --git a/drivers/video/Makefile b/drivers/video/Makefile
> index 984768ea156d..74846a8106e4 100644
> --- a/drivers/video/Makefile
> +++ b/drivers/video/Makefile
> @@ -61,6 +61,7 @@ obj-$(CONFIG_VIDEO_LCD_ENDEAVORU) += endeavoru-panel.o
> obj-$(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-$(CONFIG_VIDEO_LCD_ILITEK_ILI9806E) += ilitek-ili9806e.o
> obj-$(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
> diff --git a/drivers/video/ilitek-ili9806e.c b/drivers/video/ilitek-ili9806e.c
> new file mode 100644
> index 000000000000..e1b27e12dde5
> --- /dev/null
> +++ b/drivers/video/ilitek-ili9806e.c
> @@ -0,0 +1,354 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (C) 2026 Amarula Solutions, Dario Binacchi
> <[email protected]>
> + */
> +
> +#include <backlight.h>
> +#include <dm.h>
> +#include <mipi_display.h>
> +#include <panel.h>
> +#include <spi.h>
> +#include <asm/gpio.h>
> +#include <dm/device_compat.h>
> +#include <linux/delay.h>
> +#include <power/regulator.h>
> +
> +struct ilitek_ili9806e_priv {
> + struct udevice *vdd;
> + struct udevice *backlight;
> + struct gpio_desc reset_gpio;
> + const struct ilitek_ili9806e_desc *desc;
> +};
> +
> +struct ilitek_ili9806e_desc {
> + const struct display_timing timing;
> + void (*init_sequence)(struct udevice *dev);
> +};
> +
> +static int ilitek_ili9806e_dcs_write(struct udevice *dev, u8 cmd, const u8
> *seq, int len)
> +{
> + u16 data[16];
> + int i, ret;
> +
> + if ((len + 1) > ARRAY_SIZE(data)) {
> + dev_err(dev, "Command length (%d) exceeds buffer size (%lu)\n",
> + len + 1, ARRAY_SIZE(data));
> + return -EMSGSIZE;
> + }
> +
> + data[0] = cmd;
> + if (len) {
> + for (i = 0; i < len; i++)
> + data[i + 1] = seq[i] | 0x0100;
> + }
> +
> + ret = dm_spi_xfer(dev, (len + 1) * 8 * sizeof(u16), data, NULL,
> + SPI_XFER_ONCE);
> + return 0;
> +}
> +
> +#define ilitek_ili9806e_dcs_write_seq(dev, cmd, seq...) \
> +({ \
> + static const u8 b[] = { seq }; \
> + ilitek_ili9806e_dcs_write(dev, cmd, b, ARRAY_SIZE(b)); \
> +})
> +
> +static int ilitek_ili9806e_enable_backlight(struct udevice *dev)
> +{
> + struct ilitek_ili9806e_priv *priv = dev_get_priv(dev);
> + const struct ilitek_ili9806e_desc *desc = priv->desc;
> +
> + desc->init_sequence(dev);
> +
> + return panel_set_backlight(dev, BACKLIGHT_DEFAULT);
> +}
> +
> +static int ilitek_ili9806e_set_backlight(struct udevice *dev, int percent)
> +{
> + struct ilitek_ili9806e_priv *priv = dev_get_priv(dev);
> + int ret;
> +
> + ret = backlight_enable(priv->backlight);
> + if (ret) {
> + dev_err(dev, "Cannot enable backlight\n");
> + return ret;
> + }
> +
> + ret = backlight_set_brightness(priv->backlight, percent);
> + if (ret)
> + dev_err(dev, "Cannot set backlight brightness\n");
> +
> + return ret;
> +}
> +
> +static int ilitek_ili9806e_get_display_timing(struct udevice *dev,
> + struct display_timing *timing)
> +{
> + struct ilitek_ili9806e_priv *priv = dev_get_priv(dev);
> +
> + memcpy(timing, &priv->desc->timing, sizeof(*timing));
Insert a blank line before return.
> + return 0;
> +}
> +
> +static int ilitek_ili9806e_of_to_plat(struct udevice *dev)
> +{
> + struct ilitek_ili9806e_priv *priv = dev_get_priv(dev);
> + int ret;
> +
> + if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
> + ret = device_get_supply_regulator(dev, "vdd-supply",
> &priv->vdd);
> + if (ret) {
> + dev_err(dev, "Cannot get vdd supply\n");
> + return ret;
> + }
> + }
> +
> + ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
> + "backlight", &priv->backlight);
> + if (ret) {
> + dev_err(dev, "Cannot get backlight\n");
> + return ret;
> + }
> +
> + ret = gpio_request_by_name(dev, "reset-gpios", 0,
> + &priv->reset_gpio, GPIOD_IS_OUT);
> + if (ret) {
> + dev_err(dev, "Cannot get reset GPIO\n");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int ilitek_ili9806e_hw_init(struct udevice *dev)
> +{
> + struct ilitek_ili9806e_priv *priv = dev_get_priv(dev);
> + int ret;
> +
> + ret = dm_gpio_set_value(&priv->reset_gpio, 1);
> + if (ret) {
> + dev_err(dev, "Cannot enter reset\n");
> + return ret;
> + }
> +
> + ret = regulator_set_enable_if_allowed(priv->vdd, 1);
> + if (ret) {
> + dev_err(dev, "Cannot enable vdd-supply\n");
> + return ret;
> + }
> +
> + mdelay(20);
> +
> + ret = dm_gpio_set_value(&priv->reset_gpio, 0);
> + if (ret) {
> + dev_err(dev, "Cannot exit reset\n");
> + return ret;
> + }
> +
> + mdelay(20);
> +
> + return 0;
> +}
> +
> +static int ilitek_ili9806e_probe(struct udevice *dev)
> +{
> + struct ilitek_ili9806e_priv *priv = dev_get_priv(dev);
> + struct spi_slave *slave = dev_get_parent_priv(dev);
> + int ret;
> +
> + ret = spi_set_wordlen(slave, 9);
> + if (ret) {
> + dev_err(dev, "Cannot set SPI.bits_per_word\n");
> + return ret;
> + }
> +
> + ret = spi_claim_bus(slave);
> + if (ret) {
> + dev_err(dev, "Cannot get SPI bus\n");
> + return ret;
> + }
> +
> + priv->desc = (struct ilitek_ili9806e_desc *)dev_get_driver_data(dev);
Add a blank line before return.
> + return ilitek_ili9806e_hw_init(dev);
> +}
> +
> +static const struct panel_ops ilitek_ili9806e_ops = {
> + .enable_backlight = ilitek_ili9806e_enable_backlight,
> + .set_backlight = ilitek_ili9806e_set_backlight,
> + .get_display_timing = ilitek_ili9806e_get_display_timing,
> +};
> +
> +static void rk050hr345_ct106a_init(struct udevice *dev)
> +{
> + /* Switch to page 1 */
> + ilitek_ili9806e_dcs_write_seq(dev, 0xff, 0xff, 0x98, 0x06, 0x04, 0x01);
> + /* Interface Settings */
> + ilitek_ili9806e_dcs_write_seq(dev, 0x08, 0x10);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x21, 0x01);
> + /* Panel Settings */
> + ilitek_ili9806e_dcs_write_seq(dev, 0x30, 0x01);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x31, 0x00);
> + /* Power Control */
> + ilitek_ili9806e_dcs_write_seq(dev, 0x40, 0x15);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x41, 0x44);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x42, 0x03);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x43, 0x09);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x44, 0x09);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x50, 0x78);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x51, 0x78);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x52, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x53, 0x3a);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x57, 0x50);
> + /* Timing Control */
> + ilitek_ili9806e_dcs_write_seq(dev, 0x60, 0x07);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x61, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x62, 0x08);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x63, 0x00);
> + /* Gamma Settings */
> + ilitek_ili9806e_dcs_write_seq(dev, 0xa0, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xa1, 0x03);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xa2, 0x0b);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xa3, 0x0f);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xa4, 0x0b);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xa5, 0x1b);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xa6, 0x0a);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xa7, 0x0a);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xa8, 0x02);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xa9, 0x07);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xaa, 0x05);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xab, 0x03);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xac, 0x0e);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xad, 0x32);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xae, 0x2d);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xaf, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xc0, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xc1, 0x03);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xc2, 0x0e);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xc3, 0x10);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xc4, 0x09);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xc5, 0x17);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xc6, 0x09);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xc7, 0x07);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xc8, 0x04);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xc9, 0x09);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xca, 0x06);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xcb, 0x06);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xcc, 0x0c);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xcd, 0x25);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xce, 0x20);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xcf, 0x00);
> +
> + /* Switch to page 6 */
> + ilitek_ili9806e_dcs_write_seq(dev, 0xff, 0xff, 0x98, 0x06, 0x04, 0x06);
> + /* GIP settings */
> + ilitek_ili9806e_dcs_write_seq(dev, 0x00, 0x21);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x01, 0x09);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x02, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x03, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x04, 0x01);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x05, 0x01);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x06, 0x80);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x07, 0x05);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x08, 0x02);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x09, 0x80);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x0a, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x0b, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x0c, 0x0a);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x0d, 0x0a);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x0e, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x0f, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x10, 0xe0);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x11, 0xe4);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x12, 0x04);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x13, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x14, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x15, 0xc0);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x16, 0x08);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x17, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x18, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x19, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x1a, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x1b, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x1c, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x1d, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x20, 0x01);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x21, 0x23);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x22, 0x45);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x23, 0x67);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x24, 0x01);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x25, 0x23);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x26, 0x45);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x27, 0x67);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x30, 0x01);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x31, 0x11);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x32, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x33, 0xee);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x34, 0xff);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x35, 0xbb);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x36, 0xca);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x37, 0xdd);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x38, 0xac);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x39, 0x76);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x3a, 0x67);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x3b, 0x22);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x3c, 0x22);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x3d, 0x22);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x3e, 0x22);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x3f, 0x22);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x40, 0x22);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x52, 0x10);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x53, 0x10);
> +
> + /* Switch to page 7 */
> + ilitek_ili9806e_dcs_write_seq(dev, 0xff, 0xff, 0x98, 0x06, 0x04, 0x07);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x17, 0x22);
> + ilitek_ili9806e_dcs_write_seq(dev, 0x02, 0x77);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xe1, 0x79);
> + ilitek_ili9806e_dcs_write_seq(dev, 0xb3, 0x10);
> +
> + /* Switch to page 0 */
> + ilitek_ili9806e_dcs_write_seq(dev, 0xff, 0xff, 0x98, 0x06, 0x04, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
> + ilitek_ili9806e_dcs_write_seq(dev, MIPI_DCS_EXIT_SLEEP_MODE);
> +
> + mdelay(120);
> +
> + ilitek_ili9806e_dcs_write_seq(dev, MIPI_DCS_SET_DISPLAY_ON);
> +
> + mdelay(120);
> +}
> +
> +static const struct ilitek_ili9806e_desc rk050hr345_ct106a_desc = {
> + .timing = {
> + .pixelclock.typ = 27000000,
> + .hactive.typ = 480,
> + .hfront_porch.typ = 10,
> + .hback_porch.typ = 10,
> + .hsync_len.typ = 10,
> + .vactive.typ = 854,
> + .vfront_porch.typ = 10,
> + .vback_porch.typ = 10,
> + .vsync_len.typ = 10,
> + .flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW,
> + },
> + .init_sequence = rk050hr345_ct106a_init,
> +};
> +
> +static const struct udevice_id ilitek_ili9806e_ids[] = {
> + {
> + .compatible = "rocktech,rk050hr345-ct106a",
> + .data = (ulong)&rk050hr345_ct106a_desc,
> + },
> + { }
> +};
> +
> +U_BOOT_DRIVER(ilitek_ili9806e) = {
> + .name = "ilitek_ili9806e",
> + .id = UCLASS_PANEL,
> + .of_match = ilitek_ili9806e_ids,
> + .ops = &ilitek_ili9806e_ops,
> + .of_to_plat = ilitek_ili9806e_of_to_plat,
> + .probe = ilitek_ili9806e_probe,
> + .priv_auto = sizeof(struct ilitek_ili9806e_priv),
> + .flags = DM_FLAG_PRE_RELOC,
> +};
