forumtrekker

Hello! First of all, thank you robertoj for this treasure trove of information - truly, I searched so much of the internet before finding this, because seemingly nobody is sharing DTS files for tft screens at all that aren't on a raspberry pi (which uses a different system afaik). I am using a rockpi 4bplus, trying to get an ili9488/86 tft screen to work, and struggling. I've used your latest DTS from page 1, using panel-mipi, verified it loads into initramfs using your other threads, compiled my own armbian edge on kernel 6.18 (and tried on kernel 6.12), corrected all FDT err not found errors on the DTS for my use case (my gpio numbers were out of scope)... still, all I get on my display is a blank white screen with no dmesg errors or comments about spi, panel etc... ;-; Not sure what else to try at this point. I'll post my files below, along with translated gpio pin numbers: /dts-v1/; /plugin/; /{ compatible = "radxa,rockpi4b-plus", "radxa,rockpi4", "rockchip,rk3399"; fragment@0 { target = <&spi1>; __overlay__ { #address-cells = <1>; #size-cells = <0>; pinctrl-names = "default"; /* new for linux 6.13 */ pinctrl-0 = <&spi1_clk &spi1_cs0 &spi1_rx &spi1_tx>; /* new for linux 6.13 */ cs-gpios = <&spi1_cs0>, <&gpio4 26 0>; /* lcd, touch chip select */ panel: panel@0 { compatible = "panel-mipi-dbi-spi"; status = "okay"; reg = <0>; spi-max-frequency = <40000000>; width-mm=<84>; height-mm=<56>; reset-gpios = <&gpio4 29 1>; /* taken from rock3c setup, then modified for armbian */ dc-gpios = <&gpio4 28 0>; /* 1 is low, 0 is high */ write-only; format = "b6x2g6x2r6x2"; panel-timing { hactive = <480>; vactive = <320>; hback-porch = <0>; vback-porch = <0>; clock-frequency = <0>; hfront-porch = <0>; hsync-len = <0>; vfront-porch = <0>; vsync-len = <0>; }; }; ads7846: ads7846@1 { compatible = "ti,ads7846"; reg = <1>; pinctrl-names = "default"; spi-max-frequency = <1000000>; interrupt-parent = <&gpio4>; interrupts = <21 2>; /* 2 is IRQ_TYPE_EDGE_FALLING pendown-gpio = <&gpio4 21 0>; /* same as interrupt, pulled high */ vcc-supply = <&vcc5v0_sys>; /* Fill in the voltage according to the actual power supply c> /* OPTIONS */ ti,x-min = /bits/ 16 <0>; ti,y-min = /bits/ 16 <0>; ti,x-max = /bits/ 16 <0XFFF>; ti,y-max = /bits/ 16 <0XFFF>; ti,pressure-min = /bits/ 16 <0>; ti,pressure-max = /bits/ 16 <0XFFF>; ti,x-plate-ohms = /bits/ 16 <400>; ti,swap-xy = <1>; }; }; }; };