mfreudenberg

Hi, i'm currently trying to disable the serial console on port 2 on my Rockchip based Rockpi 4B (based on rk3399). I already found the following forum thread, that describes in brief, that i basically have to recompile my own armbian image. But still I'm missing some information. I have read the docs in docs.armbian.com and watched the YouTube video on how to build an armbian image. So far, i was able to setup a VM for building an image on my workstation. I also had a successful compile run yesterday, that created some output in my output folder. Now, I'd like to apply a patch, that changes the serial debugging console during boot from port 2 to port 4. I have created a patchfile using the source code files from the mainline linux repository with the following command: ``` diff -Naur rk3399-rock-pi-4.dtsi rk3399-rock-pi-4.dtsi.1 > rk3399-rock-pi-4.dtsi.patch ``` My patch file looks like this now: --- rk3399-rock-pi-4.dtsi 2022-08-29 12:33:21.534325708 +0000 +++ rk3399-rock-pi-4.dtsi.1 2022-08-29 12:36:59.535513608 +0000 @@ -17,7 +17,7 @@ }; chosen { - stdout-path = "serial2:1500000n8"; + stdout-path = "serial4:1500000n8"; }; clkin_gmac: external-gmac-clock { The original file is from here. My question(s) would be: - is this the correct way to create the patch file? - Where do i put the patch file (and how do i name it)? I have the following folder structure in my userpatches/u-boot directory: drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-clearfog/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-helios4/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-imx6/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-imx7d-current/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-imx7d-legacy/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-media/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-meson/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-meson64/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-mt7623/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-mvebu64/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-mvebu-edge/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-odroid/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-odroidxu4/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-rk322x/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-rk35xx/ drwxrwsr-x 2 root sudo 4096 Aug 30 08:08 u-boot-rockchip/ // <---- i would place the patch file here. Is that correct? drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-rockchip64/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-rockchip-rk3588/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-rockpis/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-s5p6818/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-sun50iw9/ drwxrwsr-x 2 root sudo 4096 Aug 29 12:45 u-boot-sunxi/ I'd appreciate any help and input! Thanks in advance, Michael