Digitalman1983 2 Posted November 20, 2020 Share Posted November 20, 2020 LCD support does not appear to be working in the latest builds (stable kernel 5.8.6, development kernel 5.9.7) My understanding is that this has been an issue for a while with A64 boards, specifically the Pine64, but that it was working at one time. Here's what I've tried so far: -Followed instructions at https://docs.armbian.com/Hardware_Allwinner/ and added "setenv video-mode sunxi:480x272-24@60,monitor=lcd,hpd=1,edid=1" to boot.cmd and put "saveenv" at the end, re-compiled boot.scr -Did a modprobe of panel-olimex-lcd-olinuxino -Rebooted several times -Ensured that LCD jumper was closed and verified LCD was working with Olimex builds. Screen flickers at startup then stays white. Any thoughts? Link to post Share on other sites More sharing options...
Digitalman1983 2 Posted November 20, 2020 Author Share Posted November 20, 2020 One additional comment, I noticed according to the hardware notes in armbian docs that CONFIG_VIDEO_LCD_MODE must be enabled in kernel configuration. I just checked my kernel configuration and that option does not exist. Link to post Share on other sites More sharing options...
Gediz 2 Posted November 23, 2020 Share Posted November 23, 2020 On 11/20/2020 at 7:05 PM, Digitalman1983 said: One additional comment, I noticed according to the hardware notes in armbian docs that CONFIG_VIDEO_LCD_MODE must be enabled in kernel configuration. I just checked my kernel configuration and that option does not exist. I do not know about the other issues but if i recall correctly CONFIG_VIDEO_LCD_MODE is actually an option in U-Boot, not kernel. 1 Link to post Share on other sites More sharing options...
Digitalman1983 2 Posted November 23, 2020 Author Share Posted November 23, 2020 Thanks for that, Gediz, In looking at the Olimex forum post https://www.olimex.com/forum/index.php?topic=4463.0 regarding the A13, as well as http://linux-sunxi.org/LCD it would appear that the CONFIG_VIDEO_LCD_MODE is indeed part of the configuration for U-Boot, which requires U-boot to be custom built: git clone git://git.denx.de/u-boot.git cd u-boot/ git checkout v2015.04 -b tmp https://developer.arm.com/-/media/Files/downloads/gnu-a/9.2-2019.12/binrel/gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu.tar.xz tar -xvf gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu.tar.xz make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- a64-olinuxino_defconfig make menuconfig This allows the configuration of U-boot where the LCD can be properly enabled. I'm working on the next step, which is properly linking the compiler to build the U-boot image, as well as adding a user patch to armbian build tools to allow use of the custom U-boot binary. Stay tuned. Link to post Share on other sites More sharing options...
Gediz 2 Posted November 24, 2020 Share Posted November 24, 2020 18 hours ago, Digitalman1983 said: Thanks for that, Gediz, In looking at the Olimex forum post https://www.olimex.com/forum/index.php?topic=4463.0 regarding the A13, as well as http://linux-sunxi.org/LCD it would appear that the CONFIG_VIDEO_LCD_MODE is indeed part of the configuration for U-Boot, which requires U-boot to be custom built: git clone git://git.denx.de/u-boot.git cd u-boot/ git checkout v2015.04 -b tmp https://developer.arm.com/-/media/Files/downloads/gnu-a/9.2-2019.12/binrel/gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu.tar.xz tar -xvf gcc-arm-9.2-2019.12-x86_64-aarch64-none-linux-gnu.tar.xz make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- a64-olinuxino_defconfig make menuconfig This allows the configuration of U-boot where the LCD can be properly enabled. I'm working on the next step, which is properly linking the compiler to build the U-boot image, as well as adding a user patch to armbian build tools to allow use of the custom U-boot binary. Stay tuned. You're welcome. If you don't mind, I'd recommend you to use a more recent U-Boot version if there isn't any special purpose to use v2015.04. By the way, I had to spend a little bit amount of time to integrate a custom U-Boot and Linux to Armbian for my own use case. I thought that it'd help to see what/where should i add/modify back in then. Maybe this may help you a bit. By the way, do not mind FEX. It was for a really old kernel. . ├── config │ ├── boards │ │ └── myboard-a13.csc │ ├── fex │ │ └── olinux-som-a13.fex │ ├── kernel │ │ └── linux-sun5i-default.config │ └── sources │ └── sun5i.conf ├── defconfig │ └── u-boot │ └── myboard-a13_defconfig └── userpatches ├── config-myboard.conf └── u-boot └── u-boot-sunxi-legacy └── myboard-a13_defconfig.patch Just after copying an overlay like this to your Armbian build directory, then ./compile.sh myboard This configuration may be outdated to an extent. It's been some months. 1 Link to post Share on other sites More sharing options...
Digitalman1983 2 Posted November 24, 2020 Author Share Posted November 24, 2020 Good catch.... "git checkout v2015.04 -b tmp" should be "git checkout v2020.10 -b tmp" Link to post Share on other sites More sharing options...
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