Green Daddy

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  1. The driver you quoted is for legacy kernel. LCD enabling is much simpler with legacy. Mainline needs the steps mentioned in the tutorial. Hope that helps!
  2. <OT> First post - so hi everyone and thanks for the great stuff here. I am new to Armbian, just installed yesterday (replace bananian), migrated everything, fine. </OT> It took me several hours to get my 5" LCD display working on Bananapro but it's working now :-) . All the stuff to do it is there, however it wasn't easy for me as a noob to get the relevant items out and to adopt to changes that occurred over time. So, by summarizing the different steps I'd like to give back - maybe it's useful. If I did not understand correctly, just drop me a note. Of course, dates and version numbers may progress. Full credits to @MartinKeppler and @zador.blood.stained It's basically 2 steps: You need a u-boot version that supports the LCD - must be compiled You need a dtb (Device Tree Blob) file that fits to your Kernel and supports pwm (Power for the LCD) ad 1) You need a Linux x64 PC to compile u-boot. NOTE: If you want to compile on a Windows 10 Subsystem for Linux, build will fail due to fakeroot incompatibility. You need to replace fakeroot with fakeroot-tcp: sudo update-alternatives --set fakeroot /usr/bin/fakeroot-tcp Go to https://github.com/armbian/build and follow instructions from README.md (as root) with change in bold: CREATE_PATCHES=yes tells the compile process to stop after downloading and preparing the sources, so they can be modified when needed (and yes, we need to do that) This takes a loooong while when run for the first time on a vanilla linux. Build u-boot and Kernel only (Kernel will not be needed). The Build process downloads the Sources. So you can only modify them when prompted to do so. When prompted to modify, change the following files: build/cache/sources/u-boot/v2017.11/configs/Bananapro_defconfig For 5" display append the following (or see your params at http://linux-sunxi.org/LCD ) CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:24,pclk_khz:30000,le:40,ri:40,up:29,lo:13,hs:48,vs:3,sync:3,vmode:0" CONFIG_VIDEO_LCD_POWER="PH12" CONFIG_VIDEO_LCD_BL_EN="PH8" CONFIG_VIDEO_LCD_BL_PWM="PB2" build/cache/sources/u-boot/v2017.11/arch/arm/dts/sun7i-a20-bananapro.dts build/cache/sources/u-boot/v2017.11/arch/arm/dts/sun7i-a20-bananapi.dts build/cache/sources/linux-mainline/linux-4.14.y/arch/arm/boot/dts/sun7i-a20-bananapro.dts build/cache/sources/linux-mainline/linux-4.14.y/arch/arm/boot/dts/sun7i-a20-bananapi.dts Add (after &pio section) : Let the compiler finish u-boot. You will find build/output/debs/linux-u-boot-next-bananapipro_5.37_armhf.deb install it on your pi using sudo dpkg -i linux-u-boot-next-bananapipro_5.37_armhf.deb Step 1 completed. ad 2) To create a device specific file fitting to your Kernel and Board, you can recompile your kernel version directly on the PI. I used the guide supplied by @zador.blood.stained mkdir kernel cd kernel git init . git remote add origin "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git" git fetch --depth 1 origin tags/v4.13.16 sudo git checkout -f FETCH_HEAD Then edit arch/arm/boot/dts/sun7i-a20-bananapi.dts and arch/arm/boot/dts/sun7i-a20-bananapro.dts to include changes from above (add the &pwm section) Run in the top directory of kernel source tree sudo cp /boot/config-`uname -r` .config sudo make ARCH=arm dtbs After the process is finished, you should get compiled DT files arch/arm/boot/dts/sun7i-a20-bananapi.dtb arch/arm/boot/dts/sun7i-a20-bananapro.dtb Copy them to /boot/dtb, reboot and pray. End of Step 2 DISCLAIMER: It worked for me - however you may end up with a non-bootable SD Card so be careful and have a backup :-)