# Raspberry Pi Zero 2 On PicoCalc **URL:** \ **Category:** PicoCalc\ **Tags:** os, hardware, retroarch\ **Created:** [June 11, 2025, 2:36am UTC](https://forum.clockworkpi.com/t/raspberry-pi-zero-2-on-picocalc/17946 "2025-06-11T02:36:19Z")\ **Posts on this page:** 1\ **Showing post:** 328
**Author:** ![lolus](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/lolus/32/15141_2.png) [@lolus](https://forum.clockworkpi.com/u/lolus)\ **Post date:** [December 27, 2025, 12:08am UTC](https://forum.clockworkpi.com/t/raspberry-pi-zero-2-on-picocalc/17946/328 "2025-12-27T00:08:21Z")
Hi, I am working on getting this to work on radxa zero3w. currently I have keyboard working and I am like 90% there to have working display, if anyone have any idea why it does not work it would be great. display does not even flicker, I know it still works as I have put in the pico back in and it worked just fine, it also worked with raspberry pi zero, but that thing is gutless and does not have wifi pins: ```auto SPI3_MOSI_M1 GPIO4_C3 SPI3_MISO_M1 GPIO4_C5 SPI3_CLK_M1 GPIO4_C2 SPI3_CS0_M1 GPIO4_C6 RESET GPIO3_C1 DC GPIO3_B2 ``` I am using display init.txt from this gitrepo : [picocalc\_trixie/picomipi.txt at main · ironat/picocalc\_trixie · GitHub](https://github.com/ironat/picocalc_trixie/blob/main/picomipi.txt) > **picolcd.txt** > > ```command > delay 120 > > command 0x28 > command 0xCB 0x39 0x2C 0x00 0x34 0x02 > command 0xCF 0x00 0xC1 0x30 > command 0xED 0x64 0x03 0x12 0x81 > command 0xE8 0x85 0x00 0x78 > command 0xEA 0x00 0x00 > command 0xF7 0x20 > command 0xC0 0x23 > command 0xC1 0x10 > command 0xC5 0x3E 0x28 > command 0xC7 0x86 > command 0x36 0x48 > command 0x21 > command 0x3A 0x55 > command 0xB1 0x00 0x11 > command 0xB6 0x08 0x82 0x27 > command 0xF2 0x02 > command 0x26 0x01 > command 0xB4 0x02 > command 0xE0 0x0F 0x31 0x2B 0x0C 0x0E 0x08 0x4E 0xF1 0x37 0x07 0x10 0x03 0x0E 0x09 0x00 > command 0xE1 0x00 0x0E 0x14 0x03 0x11 0x07 0x31 0xC1 0x48 0x08 0x0F 0x0C 0x31 0x36 0x0F > command 0x11 > delay 64 > command 0x29 > delay 20 > > ``` here is my dts, I am 90 % it is correct as I can see the driver initialize > **DTS** > > ```GNU > /dts-v1/; > /plugin/; > > / { > compatible = "radxa,zero3"; /* Update to match your SoC */ > > fragment@0 { > target = <&spi3>; /* Correct SPI3 node */ > > __overlay__ { > #address-cells = <1>; > #size-cells = <0>; > > pinctrl-names = "default"; > pinctrl-0 = <&spi3m1_pins &spi3m1_cs0>; /* Reference correct pin configuration */ > > status = "okay"; /* Enable SPI3 */ > > panel: panel@0 { > compatible = "picolcd", "panel-mipi-dbi-spi"; > reg = <0>; > spi-max-frequency = <24000000>; > width-mm=<43>; > height-mm=<43>; > reset-gpios = <&gpio3 17 0>; //GPIO3_C1 > dc-gpios = <&gpio3 10 0>; // GPIO3_B2 > write-only; > debug = <3>; > panel-timing { > hactive = <320>; > vactive = <320>; > hback-porch = <0>; > vback-porch = <0>; > clock-frequency = <24000000>; > hfront-porch = <0>; > hsync-len = <0>; > vfront-porch = <0>; > vsync-len = <0>; > }; > }; > }; > }; > > fragment@1 { > target = <&pinctrl>; /* Ensure this matches your pin controller node */ > > __overlay__ { > spi3m1_pins: spi3m1-pins { > rockchip,pins = < > 4 23 3 0 /* GPIO4_C2 as SPI3_CLK_M1 */ > 4 19 3 0 /* GPIO4_C3 as SPI3_MOSI_M1 */ > 4 21 3 0 /* GPIO4_C5 as SPI3_MISO_M1 */ > 4 24 3 0 /* GPIO4_C6 as SPI3_CS0_M1 */ > >; > }; > }; > }; > }; > > ``` here is `dmesg | grep mipi` that shows that it is initializing the driver, btw I got more info here as I added `drm.debug=0x06` to extraargs in armbianEnv.txt > **dmesg | grep mipi** > > ````auto > [10.872660] panel-mipi-dbi-spi spi3.0: Looking up power-supply property in node /spi@fe640000/panel@0 failed > [10.872699] panel-mipi-dbi-spi spi3.0: supply power not found, using dummy regulator > [10.873047] [drm:mipi_dbi_spi_init] SPI speed: 24MHz > [10.873442] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] size=136 version=1 > [10.873478] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command 11 > [10.873502] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] sleep 120ms > [10.873522] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command 28 > [10.873543] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command cb 39 2c 00 34 02 > [10.873564] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command cf 00 c1 30 > [10.873585] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command ed 64 03 12 81 > [10.873605] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command e8 85 00 78 > [10.873624] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command ea 00 00 > [10.873644] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command f7 20 > [10.873664] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command c0 23 > [10.873683] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command c1 10 > [10.873702] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command c5 3e 28 > [10.873722] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command c7 86 > [10.873741] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command 36 48 > [10.873761] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command 21 > [10.873780] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command 3a 55 > [10.873800] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command b1 00 11 > [10.873819] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command b6 08 82 27 > [10.873838] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command f2 02 > [10.873858] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command 26 01 > [10.873877] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command b4 02 > [10.873896] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command e0 0f 31 2b 0c 0e 08 4e f1 37 07 10 03 0e 09 00 > [10.873916] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command e1 00 0e 14 03 11 07 31 c1 48 08 0f 0c 31 36 0f > [10.873936] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command 11 > [10.873956] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] sleep 64ms > [10.873976] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] command 29 > [10.873996] panel-mipi-dbi-spi spi3.0: [drm:panel_mipi_dbi_commands_from_fw] sleep 20ms > [10.874219] [drm:mipi_dbi_dev_init_with_formats] rotation = 0 > [10.874849] panel-mipi-dbi-spi spi3.0: [drm:drm_sysfs_connector_hotplug_event] [CONNECTOR:31:SPI-1] generating connector hotplug event > [10.874906] [drm] Initialized panel-mipi-dbi 1.0.0 20220103 for spi3.0 on minor 1 > [10.875295] panel-mipi-dbi-spi spi3.0: [drm:__drm_fb_helper_initial_config_and_unlock] test CRTC 0 primary plane > [10.875323] panel-mipi-dbi-spi spi3.0: [drm:drm_fb_helper_generic_probe] surface width(320), height(320) and bpp(16) > [10.876142] panel-mipi-dbi-spi spi3.0: [drm:drm_mode_addfb2] [FB:36] > [10.876672] panel-mipi-dbi-spi spi3.0: [drm] fb1: panel-mipi-dbid frame buffer device > [11.167646] rockchip-mipi-csi2-hw fdfb0000.mipi-csi2-hw: enter mipi csi2 hw probe! > [11.168105] rockchip-mipi-csi2-hw fdfb0000.mipi-csi2-hw: probe success, v4l2_dev:mipi-csi2-hw!``` > > ```` also here is the proof that GPIO pins from dts are getting set correctly, I got this by using command `sudo gpioinfo -c 3 | grep output` > **activated pins** > > ```auto > line 10: "PIN_18" output consumer="dc" > line 16: unnamed output > line 17: "PIN_22" output consumer="reset" > line 27: unnamed output active-low consumer=board-antenna > > ``` thanks in advance --- _[View the full topic](https://forum.clockworkpi.com/t/raspberry-pi-zero-2-on-picocalc/17946)._