2021-12-04 02:00:01 +00:00
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= Pinephone =
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The pinephone is a cheap generic linux phone.
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2021-12-04 22:30:01 +00:00
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== u-boot ==
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2021-12-04 03:45:01 +00:00
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2022-05-07 16:15:01 +00:00
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See [[u-boot]]
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2021-12-04 02:00:01 +00:00
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== Gentoo ==
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2022-05-07 19:00:01 +00:00
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=== Filesystem layout ===
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Iteration one, using the following layout
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* gpt disklabel
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* 2048 + 128M BIOS boot (ext4)
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* +4G Linux Swap
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* +-1 Linux filesystem (ext4)
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Choose to use the stage3-arm64-systemd
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2022-05-07 19:15:01 +00:00
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=== Chrooting ===
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In order to chroot into the system, you may need to use qemu to emulate the
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system architecture. This can be done using `qemu-user-static` and
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`binfmt-qemu-static`. These allow you to chroot into an enviroment of a
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different architecture.
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2022-05-07 20:15:01 +00:00
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To chroot into the enviroment, in the root of the to be chrooted filesystem,
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run
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{{{
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#replace * with the architecture
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cp $(which qemu-*-static) usr/bin/
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chroot . qemu-*-static /bin/bash
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}}}
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2021-12-04 02:00:01 +00:00
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=== Cross compiler ===
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First, we will be compiling on a host gentoo system. To do this, first install
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2022-05-07 16:00:01 +00:00
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crossdev and the needed toolchain (See [[cross_toolchain]]).
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If your host system is not gentoo, be sure to install a cross compiler for
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aarch64.
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*The pinephone triple is aarch64-unknown-linux-gnu*
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2021-12-04 02:00:01 +00:00
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{{{
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emerge -av git ninja crossdev
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crossdev --target arm-none-eabi
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}}}
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2022-05-06 21:15:01 +00:00
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2021-12-04 02:00:01 +00:00
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=== GPU Support ===
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2021-12-04 02:15:01 +00:00
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The pinephone pro uses a Mali T860 quadcore CPU, and therefore is run using the
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lima drivers. In the phones make.conf, be sure to add
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{{{
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#/etc/portage/make.conf (chroot in phone)
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VIDEO_CARDS="lima"
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}}}
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2022-05-06 21:15:01 +00:00
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2021-12-04 02:15:01 +00:00
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In your global use, be sure to add
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{{{
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#/etc/portage/make.conf (chroot in phone)
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USE="gles gles2-only"
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}}}
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This ensures that we will only compile programs using OpenGL ES, or OpenGL for
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embedded systems.
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2022-05-06 21:15:01 +00:00
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== Troubleshooting ==
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=== Phone not booting due to fully drained battery ===
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Battery voltage will be ~2.4V when dead in my experience. To get the phone to
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boot
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1) Remove SDcard
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2) Remove battery, serial, and usb cables
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3) Reinstert the battery
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4) Hold down the RESET button
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5) While holding the button down, connect the USB port to a computer
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6) let go of the button
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7) in `lsusb` you should see `2207:330c Rockship electrions`
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