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sd-image: fix raspberry pi 0 boot
Raspberry Pi 0 was stuck at rainbow image on hdmi output and was not booting. Both dtbs are needed _and_ the enable_uart=1. Any of them missing leaves RPI0 stuck at the rainbow image.
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@ -17,6 +17,10 @@
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sdImage = {
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populateFirmwareCommands = let
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configTxt = pkgs.writeText "config.txt" ''
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# u-boot refuses to start (gets stuck at rainbow polygon) without this,
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# at least on Raspberry Pi 0.
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enable_uart=1
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# Prevent the firmware from smashing the framebuffer setup done by the mainline kernel
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# when attempting to show low-voltage or overtemperature warnings.
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avoid_warnings=1
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@ -28,7 +32,7 @@
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kernel=u-boot-rpi1.bin
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'';
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in ''
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(cd ${pkgs.raspberrypifw}/share/raspberrypi/boot && cp bootcode.bin fixup*.dat start*.elf $NIX_BUILD_TOP/firmware/)
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(cd ${pkgs.raspberrypifw}/share/raspberrypi/boot && cp bootcode.bin fixup*.dat start*.elf *.dtb $NIX_BUILD_TOP/firmware/)
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cp ${pkgs.ubootRaspberryPiZero}/u-boot.bin firmware/u-boot-rpi0.bin
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cp ${pkgs.ubootRaspberryPi}/u-boot.bin firmware/u-boot-rpi1.bin
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cp ${configTxt} firmware/config.txt
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