[PATCH 0/2] Add SPI display support for UNIHIKER M10 V1.2

[PATCH 0/2] Add SPI display support for UNIHIKER M10 V1.2

[Miotsuki Mizuno]

Describe the onboard 240x320 RGB565 display with panel-mipi-dbi.
The series adds the panel compatible and enables SPI2, GPIO reset/D-C
and the PWM1 backlight. It uses the existing DRM and SPI drivers.

This series is based on the separate board I2C2 preparation commit.
The prerequisite board patch was submitted separately:
https://lore.kernel.org/r/20261010232831.26908-1-founder@crepuse.com
It does not depend on the pending NS2009 driver or binding.

The 132-byte initialization firmware is available from:
https://github.com/mio-tsuki/panel-mipi-dbi-firmware/releases/tag/v1.0.0
Required filename: dfrobot,unihiker-m10-display.bin
SHA256: 50412ae6d29c5bbfb7fac585528a761fb249d7944011a1b19c5e0f80a0418e5f
The test kernel embeds it with CONFIG_EXTRA_FIRMWARE. Public release
does not imply linux-firmware acceptance.

The nominal active area is 43.2 x 57.6 mm, represented as 43 x 58 mm.
The published V1.3 schematic is not used as evidence for V1.2 supply
connections; optional power/io supply properties are omitted.

SPI2 input is assigned 100 MHz. Active transfer register readback
showed BAUDR=2, corresponding to 50 MHz. No oscilloscope measurement
is claimed. GPIO_ACTIVE_HIGH reset matches the existing DRM helper
and leaves the physical reset pin HIGH after initialization.

Built against Rockchip v7.4-armsoc/dts64, commit
ae965b9856f033145e292b0c29082a26bcc45efd. Target DTS/schema, binding
examples and strict checkpatch checks passed. 
The exact display DTS booted through normal U-Boot three times in this
retest with the original test kernel, without pstore instrumentation,
clk_ignore_unused or regulator_ignore_unused. Physical corner patterns
were confirmed; full and partial updates and five DRM disable/enable
cycles completed. The exact display/touch combination also booted and
its physical output was confirmed.

Earlier boots reset during early userspace; one partial USB log recorded
an instruction abort. This was not reproduced in the latest retest.
The resets may have resulted from accidental contact with a loose
jumper wire during reboot. The cause has not been established, and no
software fix is claimed.
Exact-DTS cold boot and deep suspend/resume have not been tested.

Mizuno Miotsuki (2):
  dt-bindings: display: panel-mipi-dbi-spi: Add UNIHIKER M10 display
  arm64: dts: rockchip: Enable display on UNIHIKER M10 V1.2

 .../display/panel/panel-mipi-dbi-spi.yaml     |  1 +
 .../dts/rockchip/rk3308-unihiker-m10-v1.2.dts | 53 +++++++++++++++++++
 2 files changed, 54 insertions(+)


base-commit: f4f7ecd2e0e8debcbab4789717cc79d570d665e3
-- 
2.56.0

[PATCH 1/2] dt-bindings: display: panel-mipi-dbi-spi: Add UNIHIKER M10 display

[Miotsuki Mizuno]

The DFRobot UNIHIKER M10 V1.2 has a 240x320 SPI display with an
ILI9341-compatible command interface. Its initialization sequence can
be supplied to the existing panel-mipi-dbi driver as firmware.

Add dfrobot,unihiker-m10-display as the panel-specific compatible,
with panel-mipi-dbi-spi as the fallback.

Signed-off-by: Mizuno Miotsuki <founder@crepuse.com>
---
 .../devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
index 6f0290c4e291..adef35f91670 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
@@ -72,6 +72,7 @@ properties:
   compatible:
     items:
       - enum:
+          - dfrobot,unihiker-m10-display
           - saef,sftc154b
           - sainsmart18
           - shineworld,lh133k

base-commit: f4f7ecd2e0e8debcbab4789717cc79d570d665e3
-- 
2.56.0

[PATCH 2/2] arm64: dts: rockchip: Enable display on UNIHIKER M10 V1.2

[Miotsuki Mizuno]

Enable the onboard 240x320 SPI display using panel-mipi-dbi. Add its
D/C and reset GPIOs, display timing, and PWM1 backlight, and enable
SPI2 with a maximum transfer frequency of 50 MHz.

Assign SPI2 a 100 MHz input clock from DPLL so that the controller's
even baud-rate divider can provide 50 MHz for pixel transfers.

Describe the 43.2 x 57.6 mm active area as 43 x 58 mm in the integer
millimetre properties. The panel uses RGB565 pixel data and requires the
external
initialization file dfrobot,unihiker-m10-display.bin. No DRM or SPI
controller driver changes are needed.

Signed-off-by: Mizuno Miotsuki <founder@crepuse.com>
---
 .../dts/rockchip/rk3308-unihiker-m10-v1.2.dts | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3308-unihiker-m10-v1.2.dts b/arch/arm64/boot/dts/rockchip/rk3308-unihiker-m10-v1.2.dts
index 0c03f118378a..4dc01ea73e44 100644
--- a/arch/arm64/boot/dts/rockchip/rk3308-unihiker-m10-v1.2.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3308-unihiker-m10-v1.2.dts
@@ -22,6 +22,14 @@ chosen {
 		stdout-path = "serial0:1500000n8";
 	};
 
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm1 0 10000 0>;
+		brightness-levels = <0 16 32 48 64 80 96 112 128
+				     144 160 176 192 208 224 240 255>;
+		default-brightness-level = <12>;
+	};
+
 	keys {
 		compatible = "gpio-keys";
 
@@ -154,6 +162,13 @@ &pinctrl {
 	pinctrl-names = "default";
 	pinctrl-0 = <&rtc_32k>;
 
+	lcd {
+		lcd_control: lcd-control {
+			rockchip,pins = <1 RK_PB4 RK_FUNC_GPIO &pcfg_pull_none>,
+				       <1 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	sdmmc {
 		sd_vcc_en: sd-vcc-en {
 			rockchip,pins = <4 RK_PD6 RK_FUNC_GPIO &pcfg_pull_none>;
@@ -183,6 +198,10 @@ &pwm0 {
 	status = "okay";
 };
 
+&pwm1 {
+	status = "okay";
+};
+
 &sdio {
 	#address-cells = <1>;
 	#size-cells = <0>;
@@ -216,6 +235,40 @@ &sdmmc {
 	status = "okay";
 };
 
+&spi2 {
+	assigned-clocks = <&cru SCLK_SPI2>;
+	assigned-clock-parents = <&cru PLL_DPLL>;
+	assigned-clock-rates = <100000000>;
+	status = "okay";
+
+	display@0 {
+		compatible = "dfrobot,unihiker-m10-display", "panel-mipi-dbi-spi";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&lcd_control>;
+		dc-gpios = <&gpio1 RK_PB6 GPIO_ACTIVE_HIGH>;
+		/* The DBI reset helper drives logical low, then high. */
+		reset-gpios = <&gpio1 RK_PB4 GPIO_ACTIVE_HIGH>;
+		backlight = <&backlight>;
+		format = "r5g6b5";
+		width-mm = <43>;
+		height-mm = <58>;
+
+		panel-timing {
+			clock-frequency = <0>;
+			hactive = <240>;
+			vactive = <320>;
+			hback-porch = <0>;
+			hfront-porch = <0>;
+			hsync-len = <0>;
+			vback-porch = <0>;
+			vfront-porch = <0>;
+			vsync-len = <0>;
+		};
+	};
+};
+
 &u2phy {
 	status = "okay";
 };
-- 
2.56.0

Re: [PATCH 1/2] dt-bindings: display: panel-mipi-dbi-spi: Add UNIHIKER M10 display

[Krzysztof Kozlowski]

On Sat, Oct 10, 2026 at 11:28:59PM +0000, Miotsuki Mizuno wrote:
> The DFRobot UNIHIKER M10 V1.2 has a 240x320 SPI display with an
> ILI9341-compatible command interface. Its initialization sequence can
> be supplied to the existing panel-mipi-dbi driver as firmware.
> 
> Add dfrobot,unihiker-m10-display as the panel-specific compatible,
> with panel-mipi-dbi-spi as the fallback.
> 
> Signed-off-by: Mizuno Miotsuki <founder@crepuse.com>

Same issues as with all your patches.

Best regards,
Krzysztof

Re: [PATCH 0/2] Add SPI display support for UNIHIKER M10 V1.2

[Icenowy Zheng]

在 2026-10-10六的 23:28 +0000，Miotsuki Mizuno写道：
> Describe the onboard 240x320 RGB565 display with panel-mipi-dbi.
> The series adds the panel compatible and enables SPI2, GPIO reset/D-C
> and the PWM1 backlight. It uses the existing DRM and SPI drivers.
> 
> This series is based on the separate board I2C2 preparation commit.
> The prerequisite board patch was submitted separately:
> https://lore.kernel.org/r/20261010232831.26908-1-founder@crepuse.com
> It does not depend on the pending NS2009 driver or binding.

I just came across here via mailing list.

It seems that NS2009 is designed to be mostly compatible with TI
TSC2007, and the TSC2007 driver should be able to made work with
minimal effort.

Thanks,
Icenowy

> 
> The 132-byte initialization firmware is available from:
> https://github.com/mio-tsuki/panel-mipi-dbi-firmware/releases/tag/v1.0.0
> Required filename: dfrobot,unihiker-m10-display.bin
> SHA256:
> 50412ae6d29c5bbfb7fac585528a761fb249d7944011a1b19c5e0f80a0418e5f
> The test kernel embeds it with CONFIG_EXTRA_FIRMWARE. Public release
> does not imply linux-firmware acceptance.
> 
> The nominal active area is 43.2 x 57.6 mm, represented as 43 x 58 mm.
> The published V1.3 schematic is not used as evidence for V1.2 supply
> connections; optional power/io supply properties are omitted.
> 
> SPI2 input is assigned 100 MHz. Active transfer register readback
> showed BAUDR=2, corresponding to 50 MHz. No oscilloscope measurement
> is claimed. GPIO_ACTIVE_HIGH reset matches the existing DRM helper
> and leaves the physical reset pin HIGH after initialization.
> 
> Built against Rockchip v7.4-armsoc/dts64, commit
> ae965b9856f033145e292b0c29082a26bcc45efd. Target DTS/schema, binding
> examples and strict checkpatch checks passed. 
> The exact display DTS booted through normal U-Boot three times in
> this
> retest with the original test kernel, without pstore instrumentation,
> clk_ignore_unused or regulator_ignore_unused. Physical corner
> patterns
> were confirmed; full and partial updates and five DRM disable/enable
> cycles completed. The exact display/touch combination also booted and
> its physical output was confirmed.
> 
> Earlier boots reset during early userspace; one partial USB log
> recorded
> an instruction abort. This was not reproduced in the latest retest.
> The resets may have resulted from accidental contact with a loose
> jumper wire during reboot. The cause has not been established, and no
> software fix is claimed.
> Exact-DTS cold boot and deep suspend/resume have not been tested.
> 
> Mizuno Miotsuki (2):
>   dt-bindings: display: panel-mipi-dbi-spi: Add UNIHIKER M10 display
>   arm64: dts: rockchip: Enable display on UNIHIKER M10 V1.2
> 
>  .../display/panel/panel-mipi-dbi-spi.yaml     |  1 +
>  .../dts/rockchip/rk3308-unihiker-m10-v1.2.dts | 53
> +++++++++++++++++++
>  2 files changed, 54 insertions(+)
> 
> 
> base-commit: f4f7ecd2e0e8debcbab4789717cc79d570d665e3