Seems like "pmbootstrap kconfig edit" causes unrelated kernel config
changes for some reason (probably because pmbootstrap does not install
a cross compiler for it). For now let's just edit the config manually
with the new options so everything else stays as-is.
We are in the midst of the Linux 5.8 merge window so there is no new
-rc version to rebase on. -rc1 next week is also not the perfect choice
for a release (first rc is usually still a bit unstable).
On the other hand the changes that landed the last few days are quite
nice and ready to go, so I decided to rebase on a stable kernel release
(5.7.1). Not sure if I'm ever going to do this again :)
Changes:
- Update to Linux 5.7.1
- bq-paella: Add sound and modem
- Enable some new kernel options for DB410c
- Update to Linux 5.7-rc2
- Initial support for BQ Aquaris X5 (bq-paella/picmt)
- Add speaker for samsung-gt510wifi/matissevewifi
- Add flash LED for wileyfox-crackling
- Update to Linux 5.6-rc5
- Basic audio support on samsung-gt510wifi (speaker is WIP)
- Initial support for samsung-matissevewifi
- Enable some kernel config options for elogind/Anbox/fbkeyboard
- Update to Linux 5.6-rc2
- Major improvements for Motorola Moto G4 Play (motorola-harpia)
- Display
- Touchscreen
- Accelerometer
- Audio
- Modem
- Vibrator
- Fix headphones/headset detection for wileyfox-crackling
- Add mount-matrix for samsung-a3ulte/a5ulte to fix
orientation detection with iio-sensor-proxy
- A lot of cleanup everywhere
- APKBUILD: Clean up makedepends (a lot of them are unneeded)
Unfortunately, early firmware versions on MSM8916 (used together with
Android 4.4) are not capable of booting aarch64 kernels. MSM8916 was
Qualcomm's first 64-bit capable CPU, and back when it was introduced
Android did not even support aarch64 yet. So the aarch64 capable
hardware was usually used together with armv7 binaries.
To make things worse, this firmware is also signed (usually per-device),
making it (currently) impossible to update it without help from the manufacturer.
This means that we are currently unable to run mainline on devices
that never received an update to Android 5.0
(e.g. the Samsung Galaxy S4 Mini Value Edition).
One way to circumvent this limitation is to build mainline for armv7.
This works surprisingly well with some additional fixes.
Devices with this firmware limitation are still unable to use aarch64
binaries, but at least we can run mainline on them!
