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Switch Raspberry Pi builds from proprietary firmware direct-boot to a firmware → U-Boot → GRUB → kernel chain using GPT partitioning: - GPT partition layout with fixed UUIDs matching os_install: firmware (128MB), ESP (100MB), boot (2GB FAT32), root (btrfs) - U-Boot as the kernel in config.txt, chainloading GRUB EFI - Pi-specific GRUB config overrides (console, USB quirks, cgroup) - Btrfs root with shrink-to-minimum for image compression - init_resize.sh updated for GPT (sgdisk -e) and btrfs resize - Removed os-partitions from config.yaml (now derived from fstab)
45 lines
874 B
Bash
45 lines
874 B
Bash
#!/bin/sh
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cat << EOF
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# Enable audio (loads snd_bcm2835)
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dtparam=audio=on
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# Automatically load overlays for detected cameras
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camera_auto_detect=1
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# Automatically load overlays for detected DSI displays
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display_auto_detect=1
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# Enable DRM VC4 V3D driver
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dtoverlay=vc4-kms-v3d
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max_framebuffers=2
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# Run in 64-bit mode
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arm_64bit=1
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# Disable compensation for displays with overscan
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disable_overscan=1
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[cm4]
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# Enable host mode on the 2711 built-in XHCI USB controller.
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# This line should be removed if the legacy DWC2 controller is required
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# (e.g. for USB device mode) or if USB support is not required.
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otg_mode=1
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[pi4]
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# Run as fast as firmware / board allows
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arm_boost=1
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[all]
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gpu_mem=16
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dtoverlay=pwm-2chan,disable-bt
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# Enable UART for U-Boot and serial console
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enable_uart=1
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# Load U-Boot as the bootloader (GRUB is chainloaded from U-Boot)
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kernel=u-boot.bin
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EOF
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