Samsung Galaxy S4 Mini LTE (samsung-serranolte)

Features
Flashing	Works
USB Networking	Works
Internal storage
SD card
Battery	Works
Screen	Works
Touchscreen	Works
Multimedia
3D Acceleration	Broken
Audio	Broken
Camera	Broken
Camera Flash
Connectivity
WiFi	Works
Bluetooth	Broken
GPS	Broken
NFC
Modem
Calls	Broken
SMS	Works
Mobile data	Broken
Miscellaneous
FDE
USB OTG
HDMI/DP
Sensors
Accelerometer	Broken
Magnetometer
Ambient Light
Proximity
Hall Effect
Haptics
Barometer

Samsung Galaxy S4 Mini LTE
	; S4 Mini running PostmarketOS and Xfce4
Manufacturer	Samsung
Name	Galaxy S4 Mini LTE
Codename	samsung-serranolte
Released	2013
Type	handset
Hardware
Chipset	Qualcomm Snapdragon 400 (MSM8930)
CPU	1.7 GHz dual-core Krait 300
GPU	Adreno 305
Display	960x540
Storage	8 GB, microSD
Memory	1.5GB
Architecture	armv7
Software
Original software	Android
Original version	4.4.2
postmarketOS
Category	testing
Pre-built images	no
Mainline	no

Contributors

rrooij (initial port)
scintill (USB network, modem)
maccraft123 (broken his s4mini)
Zocker1012 (broken glass, experimenting with edge channel)
Everyone else on IRC (feel free to put your name)

Users owning this device

Bastindo (Notes: I have several of these)
Gfgit (Notes: Boots LineageOS 18.1 kernel, WiFi needs fixing)
Ignapk (Notes: Current test subject)
Jakko
Mykhal (Notes: TODO; and elsewhere i9195 is named serranoltexx, so not sure)
Piero-e (Notes: international LTE / gt-i9195 / running unofficial /e/OS android.11 based (serranoltexx))
SmP971 (Notes: stock rom)
TPJS (Notes: Mint condition; stock so far)
Ungeskriptet

What works

Compiling the kernel
Flashing postmarketos
Booting
Screen display
Multi-touch
Plasma Mobile(slideshow mode)
Xfce
Mate
Weston
Touch screen (!1313)
USB Networking (!1260)
Sending SMS via terminal (!1314)
Accelerometer (echo 1 > /sys/class/input/input2/enable)
Proximity sensor (echo 1 > /sys/class/input/input4/enable)
Light sensor (echo 1 > /sys/class/input/input5/enable)
Power button (/dev/input/event0)
Volume/Home buttons (/dev/input/event8)
Menu/Back touch buttons (/dev/input/event9)

What does not work

HW acceleration (we need libhybris or mainlining or freedreno)
User Interface: gnome (stuck at boot animation)
User Interface: gnome-mobile (won't install through pmbootstrap)

Installation

Heimdall method (recommended)

Heimdall is a cross-platform and open-source tool suite used for flashing software onto Samsung devices which is integrated in pmbootstrap script.

To interact with the device through Heimdall you need to enter "flash mode": 1. Switch off the phone 2. Press and hold the VolumeDown, Home and Power buttons until a warning screen appears 3. Connect the phone to the computer 4. Press the VolumeUp button

Then the device can be interacted with through the pmbootstrap script:

   $ pmbootstrap flasher flash_rootfs # Flash the rootfs with postmarketOS distribution data

   $ pmbootstrap flasher flash_kernel # Flash the rootfs with the linux kernel

The phone might reboot after the flasher sub-command, if it does re-enter the flash mode as explained above and flash the remaining.

adb sideload method

The alternative method for those who want to maintain their custom recovery image is adb sideload from recoveries that support it e.g. TWRP

   $ pmbootstrap install --android-recovery-zip # Set up pmos for sideloading

   $ pmbootstrap flasher --method=adb sideload # Flash the pmos on the device through sideloading

Hardware

Component	Model	Notes
MUIC	Texas Instruments TSU6721
eMMC	Sandisk SEM08G	8GB
Charging	PM8921	Uses PMIC
Volume/Power/Home keys	GPIO
Touchscreen	Atmel MXT336S
Capacitive keys	Coreriver TC360
Gyroscope/Accelerometer	TDK InvenSense MPU-6500
Light/Proximity sensor	Sharp GP2A	gp2a020
Magnetometer	Yamaha YAS532
Audio	msm8230tapansnd
Audio DAC	Qualcomm WCD9304
Infrared blaster	Lattice ice4
GPU	Adreno 305
Wi-Fi/Bluetooth	Qualcomm Atheros Prima (WCN3660)
NFC	Broadcom BCM2079x
GPS	?
Modem	?
Front camera	Samsung s5k6a3yx
Main camera	Samsung s5k3h5xa

HID Buttons

See Troubleshooting:HID buttons

evtest /dev/input/event9 shows these events:

Event type 0 (EV_SYN) Event type 1 (EV_KEY)

 Event code 102 (KEY_HOME)
 Event code 114 (KEY_VOLUMEDOWN)
 Event code 115 (KEY_VOLUMEUP)

Event type 5 (EV_SW)

 Event code 0 (SW_LID) state 0

evtest /dev/input/event10 shows these events:

Event type 0 (EV_SYN)

 Event type 1 (EV_KEY)
   Event code 158 (KEY_BACK)
   Event code 254 (?)
 Event type 3 (EV_ABS)
 Event type 17 (EV_LED)
   Event code 8 (LED_MISC) state 0

Notes

This newer kernel seems to boot. I've applied some patches on top. https://github.com/gfgit/android_kernel_samsung_msm8930-common/tree/fix_gcc6_build

Some devices have a samsung-serranoltexx codename which appears to be compatible with the image of samsung-serranolte, it's unknown what the difference is.

Mainline preliminary work

This section lists all information I've found online which can be useful to mainline this device. Please edit if you found more stuff to add.

Device tree for MSM8930 and experimental charger driver

https://github.com/flto/linux/tree/msm8930

This branch contains 12 commits to support MSM8930 and PM8291 charger plus some Nokia Lumia 625 (nokia-rm941) specific code that we should skip.

Other similar charger driver to use as reference code qcom_smbb

Touchscreen

exynos5420-peach-pit.dts#L660

exynos5420 board seems to have same touchscreen chip Atmel MXT336S (Datasheet PDF)

Kernel Docs

WiFi WCN3660

qcom_wcnss_iris.c#L170

Main Camera s5k3h5xa

Downstream kernel drive seems crashing at boot, still have to investigate. Did not yet try LineageOS 18.1 kernel. Did not yet found newer driver code.

There is a maybe relevant discussion on XDA cyanogenmod-10-2