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Samsung Galaxy S5 (samsung-klte)

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Samsung Galaxy S5
Samsung Galaxy S5
Samsung Galaxy S5
Manufacturer Samsung
Name Galaxy S5
Codename samsung-klte
Released 2014
Hardware
Chipset Qualcomm MSM8974PRO-AC Snapdragon 801
CPU Quad-core 2.5 GHz Krait 400
GPU Adreno 330
Display 1080 x 1920 AMOLED
Storage 16/32 GB
Memory 2 GB
Architecture armv7
Software
Original software Android 4.4.2 (KitKat)
postmarketOS
Category testing
Pre-built images no
Mainline yes
postmarketOS kernel 3.4.113 / 5.6
Unixbench Whet/Dhry score 884.3
Features
Flashing
Works
USB Networking
Works
Internal storage
No data
SD card
No data
Battery
Works
Screen
Partial
Touchscreen
Works
Multimedia
3D Acceleration
Partial
Audio
Broken
Camera
Broken
Camera Flash
No data
Connectivity
WiFi
Works
Bluetooth
Broken
GPS
Broken
NFC
No data
Modem
Calls
Broken
SMS
Broken
Mobile data
Broken
Miscellaneous
FDE
No data
USB OTG
No data
HDMI/DP
No data
Sensors
Accelerometer
Broken
Magnetometer
No data
Ambient Light
No data
Proximity
No data
Hall Effect
No data
Haptics
No data
Barometer
No data


Contributors

Maintainer(s)

Users owning this device


Kernels comparision

There are two kernels packaged for samsung-klte in postmarketOS: downstream caf-based 3.4.113 and mainline. Supported features are different between them, for detailed info see full Component_support_table below. Short features comparison:

Component Downstream 3.4 kernel Mainline kernel
USB Networking Y Y
Touchscreen Y Y
Display P (only framebuffer) P (msm8974 has issues)
WiFi Y Y
Xwayland Y Y
Battery Y P (Percentage reporting works, no charger driver yet)
3D Acceleration (GPU) N Y
Sensors N N
Audio N (might be possible) N
Everything else N/untested N/untested

How to enter flash mode

Press and hold Volume Down + Home + Power simultaneously. Then click Volume Up to confirm.

How to enter recovery mode

Press and hold Volume Up + Home + Power simultaneously.

Installation

First, install pmbootstrap.

Setup device to be used:

$ pmbootstrap init
...
Vendor [samsung]: samsung <- enter this
Device codename [i9100]: klte   <- enter this
Kernel [downstream]: downstream        <- you probably want downstream for now
User interface [weston]:               <- choose any UI by your preference
...

Build the rootfs image:

$ pmbootstrap install

Then in order to flash it put your device in download mode, and plug it in USB. Then do:

$ pmbootstrap flasher flash_rootfs

 Hold "Volume down" + "Home" buttons at the end of the process,
 so that when phone reboots put it in flashing mode again 

$ pmbootstrap flasher flash_kernel

 This time, don't hold any button, let it reboot to Linux!

Additional info

Useful helper scripts

Default installation includes a couple of useful scripts to be used from a terminal: battery-status and set-brightness. battery-status allows you to check for battery charge level, and set-brightness allows to view/set lcd backlight brightness in range 0-255.

samsung-klte:~$ battery-status 
25
samsung-klte:~$ set-brightness 
255
samsung-klte:~$ sudo set-brightness 20
20

Mainlining Notes

Power IC

The phone uses max77804k MFD (Multi Function Device) IC to handle charging, extcon (cable detect), vibrator, flash led. This device is not in mainline, but it is very similar (i.e the same) to max77693 in register layout. In the next paragraph I'll refer to max77804k code as downstream and max77693 code as upstream.

  • Charging : downstream charging code is scary. Mainline code only reads info, and doesn't charge, so a brave soul might be able to figure out a minimal setup that does charge the phone.
  • Extcon : downstream extcon is not too bad, and it is trivial to follow the basic use cases and ensure they are ported correctly. Mainline code is different and writes different values for diffrent use cases, but following a similar structure it can be made to behave.
  • Flash Leds : these are pretty straight forward, the existing mainline code is a bit weird, but I wrote a port of downstream and it does work for the most part.
  • Vibrator : the mainline code is for a different kind of vibrator. It shouldn't be too hard to port the downstream code.

USB

At the moment usb-networking works only the first time it is plugged, and only if the (experimental) max77804k is not enabled.

There are 2 different blocks for USB on the klte. One has a good driver, and manages the somewhat working usb networking -- let's call it simple. But if the max77804k driver is enabled, it switches to the other IP block which does not have mainline drivers -- let's call it complex. Downstream only has code for the complex block.

Drivers for the complex block are present on newer SoCs from qualcomm, but at least to me, they look different than the downstream code (downstream doesn't have the notion of phy's, and this is a pretty big deal). So this could be a simple fix, but likely isn't.

Another possible approach will be to somehow let the simple block handle all the USB, but without documentation on max77804k/usb blocks this is pretty hard.

Graphics/Display

There is mainline support for the GPU with 3D Acceleration. kmscube works.

If you run phosh or plamo, you'll "crash" the display. The phone continues to work, so this shouldn't be too hard to figure out. Check this issue: https://gitlab.com/postmarketOS/pmaports/-/issues/424

If you just let the phone sit, even with no ui (terminal cursor blinking) the whole phone hard freezes, including usb networking, wifi networking, uart console. And there is no warning in dmesg.

Parts Bin code

max77693 to max77804k port (incl some usb work): https://gitlab.com/ichernev/linux-postmarketos/-/tree/max77693-update

max77804k with leds only: https://gitlab.com/ichernev/linux-postmarketos/-/tree/max77804k

Running on pure mainline

At the moment (5.6), if you want to use real mainline (from torvalds tree), you'd need this patch:

Patch:

I won't be surprised if more issues pop up in the future, as nobody is really testing for regressions on phones.

Partition layout

Partition layout:

Component support table

Component Codename Mainline kernel Since when Downstream 3.4 kernel
Debug serial msm_serial /dev/ttyMSM0 Working v4.17-rc1 yes, /dev/ttyHSL0
Volume & home buttons gpio-keys Working 5.8 yes
Regulator nodes pma8084, Maxim max77826 Working 5.8 yes
Internal storage sdhci-msm Working 5.8 yes
SD card storage sdhci-msm Working 5.11-rc1 yes
USB Networking usb_dwc3_qcom Working 5.8 yes
Display panel-simple Working In pmOS kernel fork yes
Touchscreen synaptics rmi4-i2c Working In pmOS kernel fork yes
Touchkeys Cypress tm2-touchkey Working In pmOS kernel fork yes
Vibration motor Not working yes
Notification LED Panasonic AN30259A Working 5.11-rc1 yes
WiFi brcmfmac + PCAL6416A GPIO Expander Working 5.11-rc1 yes
USB OTG Not working yes
Bluetooth brcmfmac Not working no
Battery charger Maxim max77804k Not working yes
Battery fuelgauge Maxim max17048 Working 5.11-rc1 yes
GPU drm_msm Working in pmOS kernel fork works with libhybris (test_hwcomposer_7_1_caf)
Audio Not working with libhybris (pulseaudio-modules-droid)
Modem qcom-q6v5-mss Not working powers up with libhybris
Sensors Not working yes (libhybris's test_sensors)

Links

postmarketOS packages:

Mainline kernel patches:

Development branch:

Extra:

Photos