Samsung Galaxy A7 2015 (samsung-a7)

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Samsung Galaxy A7 (2015)
neofetch
neofetch
Manufacturer Samsung
Name Galaxy A7 (2015)
Codename samsung-a7
Released 2015
Category testing
Original software Android 4.4.4 / 5.0.2
postmarketOS kernel Mainline
Hardware
Chipset Qualcomm Snapdragon 615 (MSM8939)
CPU 4x1.2 Ghz Cortex-A53 & 4x1.0 GHz Cortex-A53
GPU Adreno 405
Display 1080 x 1920
Storage 16 GB
Memory 2 GB
Architecture aarch64
Unixbench Whet/Dhry score 1022.4
Features
USB Networking
Works
Flashing
Works
Touchscreen
Works
Display
Partial
WiFi
Works
FDE
Works
Mainline
Works
Battery
Partial
3D Acceleration
Partial
Audio
Works
Bluetooth
Works
Camera
Broken
GPS
Mobile data
Works
SMS
Works
Calls
Works
USB OTG
Partial
NFC
Works
Sensors
Accelerometer
Works
Magnetometer
Works
Ambient Light
Broken
Proximity
Broken
Hall Effect
Works
Barometer
Power Sensor
Misc
Keyboard
Touchpad
USB-A
HDMI/DP
Ir TX
TrustZone
FOSS bootloader


This device is based on the Snapdragon 615.
See the SoC page for common tips, guides and troubleshooting steps

Users owning this device


How to enter flash mode

Press Volume Down, Power, and Home all at the same time to boot to Odin mode. After lk2nd is installed, press Volume Down and Power at the same time.

Installation

Some variants are released with Kitkat 4.4, which doesn't boot arm64 kernel, so upgrade to Lollipop 5.0 or later first.

lk2nd is a secondary bootloader that provides a standard fastboot interface.

  1. Download lk2nd-msm8916.img from Releases page on Github.
  2. Boot your phone to bootloader (download) mode by holding Volume Down and Home while powering up.
  3. Follow lk2nd instructions to install lk2nd. Basically flash it to boot partition (heimdall flash --BOOT lk2nd-msm8916.img)
  4. Follow Qualcomm_Snapdragon_410/412_(MSM8916)#Installation to install postmarketOS.
Note Note: Enter lk2nd fastboot mode by pressing only Volume Down + Power (without Home). Pressing Home additionally will bring you to the Samsung Download mode.

Audio

Icon WARNING: The speakers are rather loud on 100% volume and may produce distorted sound that may damage your speakers after long use. Please make sure to use reasonable volumes - your ears and your speaker will thank you!

Screen

Screen works partially. While displaying the UI works fine, adjusting the brightness doesn't work.

Touch keys

See Tm2-touchkey.

Charging

rt5033-charger driver is not available, so the charging is not controlled and there is no charging status reporting. There is also a forgotten patch[1], Jakko is looking into this.

USB OTG

Another rt5033-charger driver issue. It's currently unable to power up a usb device in mainline. Try a hub with external power supply.

3D acceleration

Framerate is reduced to 5/6x [2] on mainline. Instead of 60 fps, A7 runs at 30 fps instead. With panel driver patched, it runs at only 25 fps now.

Touchscreen

There is no successful attempt on SM-A700H for now.

$ dmesg | grep cyttsp5
[   14.031305] cyttsp5 6-0024: Error on deassert int r=-6
[   14.031344] cyttsp5 6-0024: Fail initial startup r=-19

Ambient Light/Proximity Sensor

The driver for tmd3782 ambient light/proximity sensor is not available.

Reboot Loop

There are some issues on the hardware, which cause endless reboot even you have a 100% charged battery.

See also

References