Samsung Galaxy Tab E 7.0 (SM-T116) (samsung-goyave3g)

Features
Flashing	Works
Internal storage	Works
SD card	Works
Battery	Works
Screen	Partial
Touchscreen	Partial
Multimedia
3D Acceleration	Broken
Audio	Partial
Camera	Broken
Connectivity
WiFi	Partial
Bluetooth	Broken
GPS
Modem
Calls
SMS
Mobile data
Miscellaneous
FDE
USB OTG
Sensors
Accelerometer
Power Sensor

Samsung Galaxy Tab E 7.0 /
Galaxy Tab 3V Lite
	; Galaxy Tab E 7.0 running XFCE4
Manufacturer	Samsung
Name	Galaxy Tab E 7.0 /; Galaxy Tab 3V Lite
Codename	samsung-goyave3g
Model	SM-T116BU
Released	2015
Type	tablet
Hardware
Chipset	Spreadtrum SC8830
CPU	4x 1.3 GHz Cortex-A7
GPU	Mali-400MP
Display	600x1024 TFT
Storage	8GB
Memory	1GB
Architecture	armv7
Software
Original software	Android (TouchWiz)
Original version	4.4.4
FOSS bootloader	no
postmarketOS
Category	testing
Pre-built images	no
postmarketOS kernel	3.10.17
Unixbench Whet/Dhry score	793.6

Contributors

JoseskVolpe

Users owning this device

JoseskVolpe

How to enter flash mode

Download mode: Volume Down + Power + Home
Recovery mode: Volume Up + Power + Home

Installation

$ pmbootstrap flasher flash_rootfs  # to install system
$ pmbootstrap flasher flash_kernel  # to install kernel

Boot

Boot screen is broken after Spreadtrum video patches are applied, but system boots normally.

Display

Needs this and this patch for Xorg to work properly.
After applying sprdfb-fix-swapped-colors.patch the boot screen breaks. Xorg works after system is booted. (plymouth)
Using msm-fb-refresher
Adjusting screen brightness works.

Touchscreen

Touchscreen goes to opposite locations, see pmaports #1883.

Wi-Fi and Bluetooth

Needs proprietary firmware (BCM43438).

Current status: Firmware loads, wlan0 shows up and networks are identified, but module crashes while attempting to connect to any network.

nmcli throws:

Error: Connection activation failed: The device could not be readied for configuration.

Findings

The kernel doesn't requires modules, but requires 4 files to be extracted: bcmdhd_sta.bin, nvram_net.txt, nvram_mfg_DCXO.txt, nvram_net_DCXO.txt.
Needs to change CONFIG_BCMDHD_FW_PATH and CONFIG_BCMDHD_NVRAM_PATH on config files to PostmarketOS' relative path.
Kernel's files in arch/arm/boot/dts/ needs to be patched to use PostmarketOS' relative paths for nv_path and nv_mfg_path
There are 2 proprietary binary files relative to BCM4343 in Android stock ROM at /system/vendor/firmware, but they don't seem to be needed: BCM43430A1_001.002.009.0013.0017_ORC_Goya_VE_37_4MHz.hcd and goyave3gREV02/BCM43430A1_001.002.009.0013.0015_ORC_Goya_VE.hcd

Building driver as module and loading on boot gives this error:

dhd_module_init in                 
[   11.043701] [c3] no wifi platform data, skip                                                
[   11.043731] [c3] DHD wifi platform data is required for Android build

Camera

Needs proprietary firmware.

Audio

Needs soc-sprd-audio-sc8830
Back speaker works
Headphone works
Frontal speaker not tested
Microphone works (both handset and headset), but is really low.
Sometimes audio won't work, specially after booting the device. Connecting headphone and disconnecting fixes that

PulseAudio

Edit default ALSA card and device in /usr/share/alsa/alsa.conf, then reboot

defaults.ctl.card sprdphone
defaults.pcm.card sprdphone
defaults.pcm.device sprdphone

Alternatively, you may also add these lines at /etc/asound.conf instead:

defaults.ctl.card 1
defaults.pcm.card 1
defaults.pcm.device 1

After that, PulseAudio successfully connects to Spreadtrum audio card. However, playing sounds freezes the audio buffer, playing a continuous buzz. Microphone doesn't works either. To fix that, find the following line in /etc/pulse/default.pa and disable timer-based schedulling:

load-module module-udev-detect tsched=0

3D Acceleration

Needs proprietary Mali driver, or attempt to setup open-source Lima driver on this good old manufacturer kernel.

Additional notes

Contributor is currently unable to upstream due to issues about GitLab requesting sensitive information.
Firewall doesn't works: Downstream kernel doesn't supports nftables