[PATCH 0/3] drm/panel: ilitek-ili9806e: add Rocktech RK050HR345-CT106A support

[PATCH 0/3] drm/panel: ilitek-ili9806e: add Rocktech RK050HR345-CT106A support

[Dario Binacchi]

This series extends the Ilitek ILI9806E panel driver to support the
Rocktech RK050HR345-CT106A model via SPI.

To achieve this, the current driver (previously restricted to DSI) is
refactored to support both DSI and SPI variants independently.

The series includes:
 1. A refactoring of the existing driver and Kconfig to support
    multiple buses.
 2. DT binding documentation for the Rocktech RK050HR345-CT106A.
 3. The implementation of the SPI-based driver for the Rocktech panel.


Dario Binacchi (3):
  drm/panel: ilitek-ili9806e: prepare for multiple bus support
  dt-bindings: ili9806e: add Rocktech RK050HR345-CT106A display
  drm/panel: ilitek-ili9806e: add Rocktech RK050HR345-CT106A SPI panel

 .../display/panel/ilitek,ili9806e.yaml        |  43 ++-
 MAINTAINERS                                   |   4 +-
 drivers/gpu/drm/panel/Kconfig                 |  23 +-
 drivers/gpu/drm/panel/Makefile                |   3 +-
 ...ili9806e.c => panel-ilitek-ili9806e-dsi.c} |   2 +-
 .../gpu/drm/panel/panel-ilitek-ili9806e-spi.c | 327 ++++++++++++++++++
 6 files changed, 394 insertions(+), 8 deletions(-)
 rename drivers/gpu/drm/panel/{panel-ilitek-ili9806e.c => panel-ilitek-ili9806e-dsi.c} (99%)
 create mode 100644 drivers/gpu/drm/panel/panel-ilitek-ili9806e-spi.c

-- 
2.43.0

base-commit: 7f98ab9da046865d57c102fd3ca9669a29845f67
branch: rk050hr345-ct106a

[PATCH 1/3] drm/panel: ilitek-ili9806e: prepare for multiple bus support

[Dario Binacchi]

This change clarifies that the current implementation is specific to the
MIPI-DSI interface. By separating the core config from the DSI-specific
one, we prepare the driver for future support of other buses (like
SPI) while maintaining backward compatibility through the default
assignment in Kconfig.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

 MAINTAINERS                                            |  2 +-
 drivers/gpu/drm/panel/Kconfig                          | 10 +++++++++-
 drivers/gpu/drm/panel/Makefile                         |  2 +-
 ...l-ilitek-ili9806e.c => panel-ilitek-ili9806e-dsi.c} |  2 +-
 4 files changed, 12 insertions(+), 4 deletions(-)
 rename drivers/gpu/drm/panel/{panel-ilitek-ili9806e.c => panel-ilitek-ili9806e-dsi.c} (99%)

diff --git a/MAINTAINERS b/MAINTAINERS
index a0dd762f5648..40a77e5fd2fd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7909,7 +7909,7 @@ F:	drivers/gpu/drm/panel/panel-ilitek-ili9805.c
 DRM DRIVER FOR ILITEK ILI9806E PANELS
 M:	Michael Walle <mwalle@kernel.org>
 S:	Maintained
-F:	drivers/gpu/drm/panel/panel-ilitek-ili9806e.c
+F:	drivers/gpu/drm/panel/panel-ilitek-ili9806e-dsi.c
 
 DRM DRIVER FOR JADARD JD9365DA-H3 MIPI-DSI LCD PANELS
 M:	Jagan Teki <jagan@edgeble.ai>
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 7a83804fedca..9ab72f3ab32e 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -260,12 +260,20 @@ config DRM_PANEL_ILITEK_ILI9805
 config DRM_PANEL_ILITEK_ILI9806E
 	tristate "Ilitek ILI9806E-based panels"
 	depends on OF
-	depends on DRM_MIPI_DSI
 	depends on BACKLIGHT_CLASS_DEVICE
 	help
 	  Say Y if you want to enable support for panels based on the
 	  Ilitek ILI9806E controller.
 
+config DRM_PANEL_ILITEK_ILI9806E_DSI
+	tristate "Ilitek ILI9806E DSI panel"
+	depends on DRM_MIPI_DSI
+	depends on DRM_PANEL_ILITEK_ILI9806E
+	default DRM_PANEL_ILITEK_ILI9806E
+	help
+	  Say Y here if you want to be able to access the Ilitek
+	  ILI9806E panel using DSI.
+
 config DRM_PANEL_ILITEK_ILI9881C
 	tristate "Ilitek ILI9881C-based panels"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index b9562a6fdcb3..00071a983242 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -26,7 +26,7 @@ obj-$(CONFIG_DRM_PANEL_HYDIS_HV101HD1) += panel-hydis-hv101hd1.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9341) += panel-ilitek-ili9341.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9805) += panel-ilitek-ili9805.o
-obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9806E) += panel-ilitek-ili9806e.o
+obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9806E_DSI) += panel-ilitek-ili9806e-dsi.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9882T) += panel-ilitek-ili9882t.o
 obj-$(CONFIG_DRM_PANEL_INNOLUX_EJ030NA) += panel-innolux-ej030na.o
diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9806e.c b/drivers/gpu/drm/panel/panel-ilitek-ili9806e-dsi.c
similarity index 99%
rename from drivers/gpu/drm/panel/panel-ilitek-ili9806e.c
rename to drivers/gpu/drm/panel/panel-ilitek-ili9806e-dsi.c
index 18aa6222b0c5..e02e28b67e29 100644
--- a/drivers/gpu/drm/panel/panel-ilitek-ili9806e.c
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9806e-dsi.c
@@ -561,5 +561,5 @@ module_mipi_dsi_driver(ili9806e_dsi_driver);
 
 MODULE_AUTHOR("Gunnar Dibbern <gunnar.dibbern@lht.dlh.de>");
 MODULE_AUTHOR("Michael Walle <mwalle@kernel.org>");
-MODULE_DESCRIPTION("Ilitek ILI9806E Controller Driver");
+MODULE_DESCRIPTION("Ilitek ILI9806E LCD DSI Controller Driver");
 MODULE_LICENSE("GPL");
-- 
2.43.0

[PATCH 2/3] dt-bindings: ili9806e: add Rocktech RK050HR345-CT106A display

[Dario Binacchi]

Document the Rocktech 5" 480x854 panel based on the Ilitek ILI9806E
controller.

This panel uses SPI for control and an RGB interface for display
data, so adjust the binding requirements accordingly.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

 .../display/panel/ilitek,ili9806e.yaml        | 43 +++++++++++++++++--
 1 file changed, 40 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml b/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml
index f80307579485..61d035419126 100644
--- a/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml
+++ b/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml
@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/display/panel/ilitek,ili9806e.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Ilitek ILI9806E based MIPI-DSI panels
+title: Ilitek ILI9806E based panels
 
 maintainers:
   - Michael Walle <mwalle@kernel.org>
@@ -18,6 +18,7 @@ properties:
       - enum:
           - densitron,dmt028vghmcmi-1d
           - ortustech,com35h3p70ulc
+          - rocktech,rk050hr345-ct106a
       - const: ilitek,ili9806e
 
   reg:
@@ -29,12 +30,29 @@ properties:
 required:
   - compatible
   - reg
-  - vdd-supply
-  - vccio-supply
   - reset-gpios
   - backlight
   - port
 
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - rocktech,rk050hr345-ct106a
+then:
+  $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+  properties:
+    spi-max-frequency: true
+
+  required:
+    - spi-max-frequency
+else:
+  required:
+    - vdd-supply
+    - vccio-supply
+
 unevaluatedProperties: false
 
 examples:
@@ -60,5 +78,24 @@ examples:
             };
         };
     };
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
 
+        panel@0 {
+            compatible = "rocktech,rk050hr345-ct106a", "ilitek,ili9806e";
+            reg = <0>;
+            spi-max-frequency = <10000000>;
+            reset-gpios = <&gpiob 6 GPIO_ACTIVE_LOW>;
+            backlight = <&backlight>;
+            port {
+                panel_in_rgb: endpoint {
+                    remote-endpoint = <&ltdc_out_rgb>;
+                };
+            };
+        };
+    };
 ...
-- 
2.43.0

[PATCH 3/3] drm/panel: ilitek-ili9806e: add Rocktech RK050HR345-CT106A SPI panel

[Dario Binacchi]

Add support for the Rocktech RK050HR345-CT106A panel based on the
Ilitek ILI9806E controller using the SPI bus.

The driver is designed to be easily extensible to support other panels
with different initialization sequences and display timings by
providing a specific descriptor structure for each model.

Kconfig and Makefile are updated to allow selecting the SPI variant
independently from the DSI one.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>

---

 MAINTAINERS                                   |   2 +
 drivers/gpu/drm/panel/Kconfig                 |  13 +-
 drivers/gpu/drm/panel/Makefile                |   1 +
 .../gpu/drm/panel/panel-ilitek-ili9806e-spi.c | 327 ++++++++++++++++++
 4 files changed, 342 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/panel/panel-ilitek-ili9806e-spi.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 40a77e5fd2fd..a03fc4a97c67 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7908,8 +7908,10 @@ F:	drivers/gpu/drm/panel/panel-ilitek-ili9805.c
 
 DRM DRIVER FOR ILITEK ILI9806E PANELS
 M:	Michael Walle <mwalle@kernel.org>
+M:	Dario Binacchi <dario.binacchi@amarulasolutions.com>
 S:	Maintained
 F:	drivers/gpu/drm/panel/panel-ilitek-ili9806e-dsi.c
+F:	drivers/gpu/drm/panel/panel-ilitek-ili9806e-spi.c
 
 DRM DRIVER FOR JADARD JD9365DA-H3 MIPI-DSI LCD PANELS
 M:	Jagan Teki <jagan@edgeble.ai>
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 9ab72f3ab32e..7651be0d8bae 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -263,7 +263,8 @@ config DRM_PANEL_ILITEK_ILI9806E
 	depends on BACKLIGHT_CLASS_DEVICE
 	help
 	  Say Y if you want to enable support for panels based on the
-	  Ilitek ILI9806E controller.
+	  Ilitek ILI9806E controller. This panel can be accessed using
+	  DSI or SPI.
 
 config DRM_PANEL_ILITEK_ILI9806E_DSI
 	tristate "Ilitek ILI9806E DSI panel"
@@ -274,6 +275,16 @@ config DRM_PANEL_ILITEK_ILI9806E_DSI
 	  Say Y here if you want to be able to access the Ilitek
 	  ILI9806E panel using DSI.
 
+config DRM_PANEL_ILITEK_ILI9806E_SPI
+	tristate "Ilitek ILI9806E RGB SPI panel"
+	depends on SPI
+	depends on DRM_PANEL_ILITEK_ILI9806E
+	select DRM_MIPI_DBI
+	select VIDEOMODE_HELPERS
+	help
+	  Say Y here if you want to be able to access the Ilitek
+	  ILI9806E panel using SPI.
+
 config DRM_PANEL_ILITEK_ILI9881C
 	tristate "Ilitek ILI9881C-based panels"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 00071a983242..acc1d49983cb 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -27,6 +27,7 @@ obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9341) += panel-ilitek-ili9341.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9805) += panel-ilitek-ili9805.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9806E_DSI) += panel-ilitek-ili9806e-dsi.o
+obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9806E_SPI) += panel-ilitek-ili9806e-spi.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o
 obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9882T) += panel-ilitek-ili9882t.o
 obj-$(CONFIG_DRM_PANEL_INNOLUX_EJ030NA) += panel-innolux-ej030na.o
diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9806e-spi.c b/drivers/gpu/drm/panel/panel-ilitek-ili9806e-spi.c
new file mode 100644
index 000000000000..25b19dfd2924
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9806e-spi.c
@@ -0,0 +1,327 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SPI interface to the Ilitek ILI9806E panel.
+ *
+ * Copyright (c) 2026 Amarula Solutions, Dario Binacchi <dario.binacchi@amarulasolutions.com>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+struct ili9806e_spi_panel {
+	struct mipi_dbi dbi;
+	struct drm_panel panel;
+	const struct ili9806e_spi_panel_desc *desc;
+};
+
+struct ili9806e_spi_panel_desc {
+	const struct drm_display_mode *display_mode;
+	u32 bus_format;
+	u32 bus_flags;
+	void (*init_sequence)(struct ili9806e_spi_panel *ctx);
+};
+
+static inline struct ili9806e_spi_panel *panel_to_ili9806e_spi(struct drm_panel *panel)
+{
+	return container_of(panel, struct ili9806e_spi_panel, panel);
+}
+
+static int ili9806e_spi_unprepare(struct drm_panel *panel)
+{
+	struct ili9806e_spi_panel *ctx = panel_to_ili9806e_spi(panel);
+	struct mipi_dbi *dbi = &ctx->dbi;
+
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF, 0x00);
+	mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE, 0x00);
+
+	return 0;
+}
+
+static int ili9806e_spi_prepare(struct drm_panel *panel)
+{
+	struct ili9806e_spi_panel *ctx = panel_to_ili9806e_spi(panel);
+
+	gpiod_set_value(ctx->dbi.reset, 1);
+	usleep_range(15, 50);
+	gpiod_set_value(ctx->dbi.reset, 0);
+	msleep(125);
+
+	if (ctx->desc->init_sequence)
+		ctx->desc->init_sequence(ctx);
+
+	return 0;
+}
+
+static int ili9806e_spi_get_modes(struct drm_panel *panel,
+			      struct drm_connector *connector)
+{
+	struct ili9806e_spi_panel *ctx = panel_to_ili9806e_spi(panel);
+	const struct ili9806e_spi_panel_desc *desc = ctx->desc;
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(connector->dev, desc->display_mode);
+	if (!mode)
+		return -ENOMEM;
+
+	drm_mode_set_name(mode);
+
+	connector->display_info.width_mm = mode->width_mm;
+	connector->display_info.height_mm = mode->height_mm;
+	connector->display_info.bus_flags = desc->bus_flags;
+	drm_display_info_set_bus_formats(&connector->display_info,
+					 &desc->bus_format, 1);
+
+	drm_mode_probed_add(connector, mode);
+
+	return 1;
+}
+
+static const struct drm_panel_funcs ili9806e_spi_drm_funcs = {
+	.unprepare = ili9806e_spi_unprepare,
+	.prepare   = ili9806e_spi_prepare,
+	.get_modes = ili9806e_spi_get_modes,
+};
+
+static int ili9806e_spi_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct ili9806e_spi_panel *ctx;
+	int err;
+
+	ctx = devm_kzalloc(dev, sizeof(struct ili9806e_spi_panel), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->desc = device_get_match_data(dev);
+
+	drm_panel_init(&ctx->panel, dev, &ili9806e_spi_drm_funcs,
+		       DRM_MODE_CONNECTOR_DPI);
+
+	spi_set_drvdata(spi, ctx);
+
+	ctx->dbi.reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->dbi.reset))
+		return dev_err_probe(dev, PTR_ERR(ctx->dbi.reset), "cannot get reset-gpios\n");
+
+	err = drm_panel_of_backlight(&ctx->panel);
+	if (err)
+		return dev_err_probe(dev, err, "Failed to get backlight\n");
+
+	err = mipi_dbi_spi_init(spi, &ctx->dbi, NULL);
+	if (err)
+		return dev_err_probe(dev, err, "MIPI DBI init failed\n");
+
+	drm_panel_add(&ctx->panel);
+
+	return 0;
+}
+
+static void ili9806e_spi_remove(struct spi_device *spi)
+{
+	struct ili9806e_spi_panel *ctx = spi_get_drvdata(spi);
+
+	drm_panel_remove(&ctx->panel);
+}
+
+static void rk050hr345_ct106a_init(struct ili9806e_spi_panel *ctx)
+{
+	struct mipi_dbi *dbi = &ctx->dbi;
+
+	/* Switch to page 1 */
+	mipi_dbi_command(dbi, 0xff, 0xff, 0x98, 0x06, 0x04, 0x01);
+	/* Interface Settings */
+	mipi_dbi_command(dbi, 0x08, 0x10);
+	mipi_dbi_command(dbi, 0x21, 0x01);
+	/* Panel Settings */
+	mipi_dbi_command(dbi, 0x30, 0x01);
+	mipi_dbi_command(dbi, 0x31, 0x00);
+	/* Power Control */
+	mipi_dbi_command(dbi, 0x40, 0x15);
+	mipi_dbi_command(dbi, 0x41, 0x44);
+	mipi_dbi_command(dbi, 0x42, 0x03);
+	mipi_dbi_command(dbi, 0x43, 0x09);
+	mipi_dbi_command(dbi, 0x44, 0x09);
+	mipi_dbi_command(dbi, 0x50, 0x78);
+	mipi_dbi_command(dbi, 0x51, 0x78);
+	mipi_dbi_command(dbi, 0x52, 0x00);
+	mipi_dbi_command(dbi, 0x53, 0x3a);
+	mipi_dbi_command(dbi, 0x57, 0x50);
+	/* Timing Control */
+	mipi_dbi_command(dbi, 0x60, 0x07);
+	mipi_dbi_command(dbi, 0x61, 0x00);
+	mipi_dbi_command(dbi, 0x62, 0x08);
+	mipi_dbi_command(dbi, 0x63, 0x00);
+	/* Gamma Settings */
+	mipi_dbi_command(dbi, 0xa0, 0x00);
+	mipi_dbi_command(dbi, 0xa1, 0x03);
+	mipi_dbi_command(dbi, 0xa2, 0x0b);
+	mipi_dbi_command(dbi, 0xa3, 0x0f);
+	mipi_dbi_command(dbi, 0xa4, 0x0b);
+	mipi_dbi_command(dbi, 0xa5, 0x1b);
+	mipi_dbi_command(dbi, 0xa6, 0x0a);
+	mipi_dbi_command(dbi, 0xa7, 0x0a);
+	mipi_dbi_command(dbi, 0xa8, 0x02);
+	mipi_dbi_command(dbi, 0xa9, 0x07);
+	mipi_dbi_command(dbi, 0xaa, 0x05);
+	mipi_dbi_command(dbi, 0xab, 0x03);
+	mipi_dbi_command(dbi, 0xac, 0x0e);
+	mipi_dbi_command(dbi, 0xad, 0x32);
+	mipi_dbi_command(dbi, 0xae, 0x2d);
+	mipi_dbi_command(dbi, 0xaf, 0x00);
+	mipi_dbi_command(dbi, 0xc0, 0x00);
+	mipi_dbi_command(dbi, 0xc1, 0x03);
+	mipi_dbi_command(dbi, 0xc2, 0x0e);
+	mipi_dbi_command(dbi, 0xc3, 0x10);
+	mipi_dbi_command(dbi, 0xc4, 0x09);
+	mipi_dbi_command(dbi, 0xc5, 0x17);
+	mipi_dbi_command(dbi, 0xc6, 0x09);
+	mipi_dbi_command(dbi, 0xc7, 0x07);
+	mipi_dbi_command(dbi, 0xc8, 0x04);
+	mipi_dbi_command(dbi, 0xc9, 0x09);
+	mipi_dbi_command(dbi, 0xca, 0x06);
+	mipi_dbi_command(dbi, 0xcb, 0x06);
+	mipi_dbi_command(dbi, 0xcc, 0x0c);
+	mipi_dbi_command(dbi, 0xcd, 0x25);
+	mipi_dbi_command(dbi, 0xce, 0x20);
+	mipi_dbi_command(dbi, 0xcf, 0x00);
+
+	/* Switch to page 6 */
+	mipi_dbi_command(dbi, 0xff, 0xff, 0x98, 0x06, 0x04, 0x06);
+	/* GIP settings */
+	mipi_dbi_command(dbi, 0x00, 0x21);
+	mipi_dbi_command(dbi, 0x01, 0x09);
+	mipi_dbi_command(dbi, 0x02, 0x00);
+	mipi_dbi_command(dbi, 0x03, 0x00);
+	mipi_dbi_command(dbi, 0x04, 0x01);
+	mipi_dbi_command(dbi, 0x05, 0x01);
+	mipi_dbi_command(dbi, 0x06, 0x80);
+	mipi_dbi_command(dbi, 0x07, 0x05);
+	mipi_dbi_command(dbi, 0x08, 0x02);
+	mipi_dbi_command(dbi, 0x09, 0x80);
+	mipi_dbi_command(dbi, 0x0a, 0x00);
+	mipi_dbi_command(dbi, 0x0b, 0x00);
+	mipi_dbi_command(dbi, 0x0c, 0x0a);
+	mipi_dbi_command(dbi, 0x0d, 0x0a);
+	mipi_dbi_command(dbi, 0x0e, 0x00);
+	mipi_dbi_command(dbi, 0x0f, 0x00);
+	mipi_dbi_command(dbi, 0x10, 0xe0);
+	mipi_dbi_command(dbi, 0x11, 0xe4);
+	mipi_dbi_command(dbi, 0x12, 0x04);
+	mipi_dbi_command(dbi, 0x13, 0x00);
+	mipi_dbi_command(dbi, 0x14, 0x00);
+	mipi_dbi_command(dbi, 0x15, 0xc0);
+	mipi_dbi_command(dbi, 0x16, 0x08);
+	mipi_dbi_command(dbi, 0x17, 0x00);
+	mipi_dbi_command(dbi, 0x18, 0x00);
+	mipi_dbi_command(dbi, 0x19, 0x00);
+	mipi_dbi_command(dbi, 0x1a, 0x00);
+	mipi_dbi_command(dbi, 0x1b, 0x00);
+	mipi_dbi_command(dbi, 0x1c, 0x00);
+	mipi_dbi_command(dbi, 0x1d, 0x00);
+	mipi_dbi_command(dbi, 0x20, 0x01);
+	mipi_dbi_command(dbi, 0x21, 0x23);
+	mipi_dbi_command(dbi, 0x22, 0x45);
+	mipi_dbi_command(dbi, 0x23, 0x67);
+	mipi_dbi_command(dbi, 0x24, 0x01);
+	mipi_dbi_command(dbi, 0x25, 0x23);
+	mipi_dbi_command(dbi, 0x26, 0x45);
+	mipi_dbi_command(dbi, 0x27, 0x67);
+	mipi_dbi_command(dbi, 0x30, 0x01);
+	mipi_dbi_command(dbi, 0x31, 0x11);
+	mipi_dbi_command(dbi, 0x32, 0x00);
+	mipi_dbi_command(dbi, 0x33, 0xee);
+	mipi_dbi_command(dbi, 0x34, 0xff);
+	mipi_dbi_command(dbi, 0x35, 0xbb);
+	mipi_dbi_command(dbi, 0x36, 0xca);
+	mipi_dbi_command(dbi, 0x37, 0xdd);
+	mipi_dbi_command(dbi, 0x38, 0xac);
+	mipi_dbi_command(dbi, 0x39, 0x76);
+	mipi_dbi_command(dbi, 0x3a, 0x67);
+	mipi_dbi_command(dbi, 0x3b, 0x22);
+	mipi_dbi_command(dbi, 0x3c, 0x22);
+	mipi_dbi_command(dbi, 0x3d, 0x22);
+	mipi_dbi_command(dbi, 0x3e, 0x22);
+	mipi_dbi_command(dbi, 0x3f, 0x22);
+	mipi_dbi_command(dbi, 0x40, 0x22);
+	mipi_dbi_command(dbi, 0x52, 0x10);
+	mipi_dbi_command(dbi, 0x53, 0x10);
+
+	/* Switch to page 7 */
+	mipi_dbi_command(dbi, 0xff, 0xff, 0x98, 0x06, 0x04, 0x07);
+	mipi_dbi_command(dbi, 0x17, 0x22);
+	mipi_dbi_command(dbi, 0x02, 0x77);
+	mipi_dbi_command(dbi, 0xe1, 0x79);
+	mipi_dbi_command(dbi, 0xb3, 0x10);
+
+	/* Switch to page 0 */
+	mipi_dbi_command(dbi, 0xff, 0xff, 0x98, 0x06, 0x04, 0x00);
+	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, 0x00); // 0x36
+	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); // 0x11
+
+	msleep(120);
+
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
+
+	msleep(120);
+}
+
+static const struct drm_display_mode rk050hr345_ct106a_mode = {
+	.width_mm    = 62,
+	.height_mm   = 110,
+	.clock       = 27000,
+	.hdisplay    = 480,
+	.hsync_start = 480 + 10,
+	.hsync_end   = 480 + 10 + 10,
+	.htotal      = 480 + 10 + 10 + 10,
+	.vdisplay    = 854,
+	.vsync_start = 854 + 10,
+	.vsync_end   = 854 + 10 + 10,
+	.vtotal      = 854 + 10 + 10 + 10,
+	.flags       = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+	.type        = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER,
+};
+
+static const struct ili9806e_spi_panel_desc rk050hr345_ct106a_desc = {
+	.init_sequence = rk050hr345_ct106a_init,
+	.display_mode = &rk050hr345_ct106a_mode,
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH |
+		     DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+};
+
+static const struct of_device_id ili9806e_spi_of_match[] = {
+	{ .compatible = "rocktech,rk050hr345-ct106a", .data = &rk050hr345_ct106a_desc },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ili9806e_spi_of_match);
+
+static const struct spi_device_id ili9806e_spi_ids[] = {
+	{ "rk050hr345-ct106a", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(spi, ili9806e_ids);
+
+static struct spi_driver ili9806e_spi_driver = {
+	.driver = {
+		.name = "ili9806e-spi",
+		.of_match_table = ili9806e_spi_of_match,
+	},
+	.probe = ili9806e_spi_probe,
+	.remove = ili9806e_spi_remove,
+	.id_table = ili9806e_spi_ids,
+};
+module_spi_driver(ili9806e_spi_driver);
+
+MODULE_AUTHOR("Dario Binacchi <dario.binacchi@amarulasolutions.com>");
+MODULE_DESCRIPTION("Ilitek ILI9806E LCD SPI Driver");
+MODULE_LICENSE("GPL");
-- 
2.43.0

Re: [PATCH 2/3] dt-bindings: ili9806e: add Rocktech RK050HR345-CT106A display

[Krzysztof Kozlowski]

On Tue, Jan 06, 2026 at 04:43:15PM +0100, Dario Binacchi wrote:
> @@ -29,12 +30,29 @@ properties:
>  required:
>    - compatible
>    - reg
> -  - vdd-supply
> -  - vccio-supply
>    - reset-gpios
>    - backlight
>    - port
>  
> +if:
> +  properties:
> +    compatible:
> +      contains:
> +        enum:
> +          - rocktech,rk050hr345-ct106a
> +then:
> +  $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +  properties:
> +    spi-max-frequency: true

This two lines are not needed.

> +
> +  required:
> +    - spi-max-frequency

How does it work without any supplies?

> +else:
> +  required:
> +    - vdd-supply
> +    - vccio-supply

Best regards,
Krzysztof

Re: [PATCH 1/3] drm/panel: ilitek-ili9806e: prepare for multiple bus support

[Neil Armstrong]

On 1/6/26 16:43, Dario Binacchi wrote:
> This change clarifies that the current implementation is specific to the
> MIPI-DSI interface. By separating the core config from the DSI-specific
> one, we prepare the driver for future support of other buses (like
> SPI) while maintaining backward compatibility through the default
> assignment in Kconfig.
> 
> Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
> ---
> 
>   MAINTAINERS                                            |  2 +-
>   drivers/gpu/drm/panel/Kconfig                          | 10 +++++++++-
>   drivers/gpu/drm/panel/Makefile                         |  2 +-
>   ...l-ilitek-ili9806e.c => panel-ilitek-ili9806e-dsi.c} |  2 +-
>   4 files changed, 12 insertions(+), 4 deletions(-)
>   rename drivers/gpu/drm/panel/{panel-ilitek-ili9806e.c => panel-ilitek-ili9806e-dsi.c} (99%)
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index a0dd762f5648..40a77e5fd2fd 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -7909,7 +7909,7 @@ F:	drivers/gpu/drm/panel/panel-ilitek-ili9805.c
>   DRM DRIVER FOR ILITEK ILI9806E PANELS
>   M:	Michael Walle <mwalle@kernel.org>
>   S:	Maintained
> -F:	drivers/gpu/drm/panel/panel-ilitek-ili9806e.c
> +F:	drivers/gpu/drm/panel/panel-ilitek-ili9806e-dsi.c
>   
>   DRM DRIVER FOR JADARD JD9365DA-H3 MIPI-DSI LCD PANELS
>   M:	Jagan Teki <jagan@edgeble.ai>
> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index 7a83804fedca..9ab72f3ab32e 100644
> --- a/drivers/gpu/drm/panel/Kconfig
> +++ b/drivers/gpu/drm/panel/Kconfig
> @@ -260,12 +260,20 @@ config DRM_PANEL_ILITEK_ILI9805
>   config DRM_PANEL_ILITEK_ILI9806E
>   	tristate "Ilitek ILI9806E-based panels"
>   	depends on OF
> -	depends on DRM_MIPI_DSI

You may need to check if this symbol is used in a kernel config and rename it,
and I think this one should be renamed as _CORE, with the tristate and help
text removed, the DSI and SPI should simply select it.

But first in this patch, just remove this entry and re-introduce an hidden
code config on the next patch.

>   	depends on BACKLIGHT_CLASS_DEVICE
>   	help
>   	  Say Y if you want to enable support for panels based on the
>   	  Ilitek ILI9806E controller.
>   
> +config DRM_PANEL_ILITEK_ILI9806E_DSI
> +	tristate "Ilitek ILI9806E DSI panel"
> +	depends on DRM_MIPI_DSI
> +	depends on DRM_PANEL_ILITEK_ILI9806E
> +	default DRM_PANEL_ILITEK_ILI9806E
> +	help
> +	  Say Y here if you want to be able to access the Ilitek
> +	  ILI9806E panel using DSI.
> +
>   config DRM_PANEL_ILITEK_ILI9881C
>   	tristate "Ilitek ILI9881C-based panels"
>   	depends on OF
> diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
> index b9562a6fdcb3..00071a983242 100644
> --- a/drivers/gpu/drm/panel/Makefile
> +++ b/drivers/gpu/drm/panel/Makefile
> @@ -26,7 +26,7 @@ obj-$(CONFIG_DRM_PANEL_HYDIS_HV101HD1) += panel-hydis-hv101hd1.o
>   obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o
>   obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9341) += panel-ilitek-ili9341.o
>   obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9805) += panel-ilitek-ili9805.o
> -obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9806E) += panel-ilitek-ili9806e.o
> +obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9806E_DSI) += panel-ilitek-ili9806e-dsi.o
>   obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o
>   obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9882T) += panel-ilitek-ili9882t.o
>   obj-$(CONFIG_DRM_PANEL_INNOLUX_EJ030NA) += panel-innolux-ej030na.o
> diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9806e.c b/drivers/gpu/drm/panel/panel-ilitek-ili9806e-dsi.c
> similarity index 99%
> rename from drivers/gpu/drm/panel/panel-ilitek-ili9806e.c
> rename to drivers/gpu/drm/panel/panel-ilitek-ili9806e-dsi.c
> index 18aa6222b0c5..e02e28b67e29 100644
> --- a/drivers/gpu/drm/panel/panel-ilitek-ili9806e.c
> +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9806e-dsi.c
> @@ -561,5 +561,5 @@ module_mipi_dsi_driver(ili9806e_dsi_driver);
>   
>   MODULE_AUTHOR("Gunnar Dibbern <gunnar.dibbern@lht.dlh.de>");
>   MODULE_AUTHOR("Michael Walle <mwalle@kernel.org>");
> -MODULE_DESCRIPTION("Ilitek ILI9806E Controller Driver");
> +MODULE_DESCRIPTION("Ilitek ILI9806E LCD DSI Controller Driver");
>   MODULE_LICENSE("GPL");