This is required for kernels earlier than 4.7 for bwrap to work for
normal users, and therefore for gnome web (epiphany) and flatpak.
[ci:skip-build] [ci:ignore-count]
Simply disabling FIMC IS does not work however due to compilation
errors and a null pointer dereference. 01-fix-FIMC-IS-disabling.patch
takes care of this.
As with other exynos devices some additional things had to be disabled
to make the kernel compile after FIMC IS had been disabled,
specifically:
CONFIG_CAMERA_EEPROM
CONFIG_VIDEO_EXYNOS_MIPI_CSIS
CONFIG_LEDS_MAX77803
Apart from that we also have:
02-netfilter-symbols.patch, which fixes another compilation error.
03-usb_gadget-set-random-rndis-host-MAC-address-to-prev.patch (taken
from another device) which prevents host mac address being set to
00:00:00:00:00.
Kernel sources have been changed to the lineage-16.0 branch in the
exynos5420 repo, as that is where development happens at the moment.
With these kernel sources the device boots successfully,
sometimes. Usually, kernel panics and device reboots a couple of
times, but after a few attempts (maybe 1, maybe 7) it succeeds to
boot. The problems seem to be related to FIMC IS, unfortunately it
does not seem to be possible to just disable it in the kernel config,
as that leads to compilation errors.
I have so far just experimented with getting wifi up and running, but
it does not work out of the box even after adding firmware package
with files from TheMuppets, wpa_supplicant fails to connect and dmesg
is filed with lines like:
```
[ 112.509235] [L0: wl_event_handle: 3109] CFG80211-INFO2) wl_escan_handler : Couldn't find P2PIE in probe response/beacon
```
[ci:skip-build]: already built successfully in CI
Enable CONFIG_CRYPTO_XTS for each kernel, so we can switch to using
aes-xts-plain64 as default cipher for cryptsetup (override with
"pmbootstrap --cipher"), instead of aes-cbc-plain64 (pmbootstrap#1940).
I have executed "pmbootstrap kconfig edit" on each kernel, and manually
toggled the option. The diff is not always clean, because for some
kernels it is apparently the first time, that menuconfig was executed on
the configs like that. In a few instances, it turned out that
CONFIG_ANDROID_PARANOID_NETWORK needed to be disabled too (this is
already a requirement, but as the config was incomplete, it was not
visible that this option was enabled). Very few times, I had to enable
CONFIG_EXPERIMENTAL in order to see and enable CONFIG_CRYPTO_XTS.
It would be great if we could automate such mass kconfig edits in the
future, see pmbootstrap#1942.
[skip ci]: I have verified, that every single one of these kernels builds.
CI will likely run out of time while downloading source tarballs.
