Samsung Exynos 9820 (samsung-exynos9820)

U-Boot
Primary Bootloader Whether it is possible to replace stock bootloader with U-Boot.	Broken
Secondary Bootloader Whether it is possible to chainload U-Boot from stock bootloader.	Works
Mainline Whether latest upstream versions of U-Boot are not broken and it is possible to use them.	Broken
Internal Storage Whether it is possible to boot from internal storage (e.g. eMMC or UFS).	Works
SD card Whether it is possible to boot from SD card.	Broken
USB Host Whether it is possible to boot from a USB storage or connect a keyboard.	Broken
USB Peripheral Whether it is possible to use device as a peripheral in U-Boot, e.g. for fastboot mode.	Broken
Display	Works
Buttons Whether it is possible to navigate in boot menu or grub with volume and power buttons.	Works

Features
Flashing Whether it is possible to flash the device with pmbootstrap flasher.	Broken
USB Networking After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).	Works
Internal storage eMMC, SD cards, UFS...	Works
SD card Also includes other external storage cards.	Broken
Battery Whether charging and battery level reporting work.	Broken
Screen Whether the display works; ideally with sleep mode and brightness control.	Partial
Touchscreen	Partial
Multimedia
3D Acceleration	Broken
Audio Audio playback, microphone, headset and buttons.	Broken
Camera	Broken
Camera Flash	Broken
Connectivity
WiFi	Broken
Bluetooth	Broken
GPS	Broken
NFC Near Field Communication	Broken
Modem
Calls	Broken
SMS	Broken
Mobile data	Broken
Miscellaneous
FDE Full disk encryption and unlocking with unl0kr.	Untested
USB OTG USB On-The-Go or USB-C Role switching.	Broken
Fingerprint Fingerprint reader.	Broken
Sensors
Accelerometer Handles automatic screen rotation in many interfaces.	Broken
Magnetometer Sensor to measure the Earth's magnetism	Broken
Ambient Light Measures the light level; used for automatic screen dimming in many interfaces.	Broken
Proximity	Broken
Hall Effect Measures magnetic fields; usually used as a flip cover sensor	Broken
Haptics	Broken
Barometer Sensor to measure air pressure	Broken
Power Sensor Sensor to monitor current, voltage and power. Not fuel gauge!	Broken

Samsung Exynos 9820
	; Samsung Galaxy S10 running GNOME
Manufacturer	Samsung
Name	Exynos 9820
Codename	samsung-exynos9820
Type	handset
Hardware
Chipset	Samsung Exynos 9820
Architecture	aarch64
Software
Original software The software and version the device was shipped with.	Android (One UI) 9 (One UI 1.1)
Extended version The most recent supported version from the manufacturer.	Android (One UI) 12 (One UI 4.1)
Optional software	Android (LineageOS)
FOSS bootloader	partial
postmarketOS
Category	testing
Pre-built images Whether pre-built images are available from the postmarketOS Installation page.	no
Mainline Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.	yes
pmOS kernel The kernel version that runs on the device's port.	7.2.0
Unixbench score Unixbench Whetstone/Dhrystone score. See Unixbench.	6044.6
Device package	device-samsung-exynos9820
Kernel package	linux-postmarketos-exynos9820
Initial MR Initial merge request.	pmaports!8999

This is a generic port that boots with UEFI for Samsung Exynos 9820 based devices.

Device	Codename	Chipset	Architecture
Samsung Galaxy S10	samsung-beyond1lte	Samsung Exynos 9820	aarch64
Samsung Galaxy S10+	samsung-beyond2lte	Samsung Exynos 9820	aarch64

Contributors

User:Chiffa

Users owning this device

How to enter flash mode

TWRP (Recovery): hold Volume Up+Bixby while connecting a USB host, or (with USB debugging enabled) - execute $ adb reboot recovery on a connected usb host.

Installation

Prerequisites

The following steps are required before attempting to install postmarketOS on this device:

Perform an OEM unlock.
Install developer vbmeta.img.
Install TWRP.

After performing an OEM unlock, the device will start reporting the following message at every boot:

This phone's bootloader is unlocked and its software integrity can't be verified. Any data on this phone may be vulnerable to attackers. Don't store any important or sensitive information on this phone. Press power key to continue.

It's not required to press the power key to continue booting.

WARNING:

Performing an OEM unlock and installing a custom OS will trip the Knox bit and the boot screen will show message below at every boot. This operation is irreversible.

This phone is not running Samsung's official software. You may have problems with features or security, and you won't be able to install software updates.

U-Boot

Exynos 9820 devices come with the S-Boot that handles CPU, DRAM, UFS and screen initialization. Trying to cover all that initialization in a FOSS project is too much work, so it's used as a primary bootloader. The issue with S-Boot is that it ignores cmdline and boot offset parameters from the boot.img and doesn't accept mainline-compatible DTBs.

To work around that, this port uses a custom U-Boot fork that features pinctrl and a UFS driver, which is enough to boot the kernel using EFI. There are no pre-built u-boot images available at the moment. There is ongoing work aimed at cleaning up the fork and submitting the relevant patches upstream. This will open up a path to add the device to Tauchgang U-Boot and have automatic bootloader updates.

The U-boot fork is located at https://github.com/chiffathefox/u-boot/tree/exynos9820 and can be built with the following commands:

git clone https://github.com/chiffathefox/u-boot -b exynos9820
cd u-boot
make CC=aarch64-linux-gnu-gcc-10 CROSS_COMPILE=aarch64-linux-gnu- exynos9820_defconfig
make CC=aarch64-linux-gnu-gcc-10 CROSS_COMPILE=aarch64-linux-gnu- -j "$(nproc)"
mkbootimg --kernel u-boot.bin -o boot.img

adb wait-for-recovery
adb push boot.img /tmp
adb shell dd if=/tmp/boot.img of=/dev/block/platform/13d60000.ufs/by-name/boot

Using pmbootstrap

Follow Installation/Using pmbootstrap. When asked for the device's vendor/codename, select samsung as the vendor and exynos9820 as the codename.

To flash the image to the device, enter TWRP (see #How to enter flash mode), connect your device to the PC and run the following commands:

adb wait-for-recovery
adb push "$(pmbootstrap config work)/chroot_native/home/pmos/rootfs/samsung-exynos9820.img" /tmp
adb shell dd if=/tmp/samsung-exynos9820.img of=/dev/block/platform/13d60000.ufs/by-name/userdata
adb shell sync
adb shell twrp reboot