Disable debug options and SMP, and remove support for other platforms.
Unixbench reports a speedup for process creation and syscalls, from
Process Creation 126.0 1043.8 82.8
System Call Overhead 15000.0 235497.3 157.0
to
Process Creation 126.0 1826.7 145.0
System Call Overhead 15000.0 421030.2 280.7
Updated the kernel to the latest version from LineageOS [1] (branch
`cm-14.1`), copied their configuration file and updated it according
to `pmbootstrap kconfig check`. Previous kernel was from `cm-12.1`
branch.
Fixed firmware package. Switched firmware source to
LineageOS/TheMuppets and install only the Wi-Fi firmware, but into the
correct directory. Previously all available firmware was simply copied
into wrong directories.
[1] https://github.com/LineageOS/android_kernel_htc_msm8960
[ci:skip-build] already built successfully in CI
This device runs on linux-postmarketos-rockchip which at the moment of
writing is 5.13.0 with (only) 6 patches applied, so close-to mainline.
I personally use 2 of these devices with postmarketOS installed daily as
my homeserver setup and it has worked really well. It's also a good
target to run Plasma Bigscreen on as a TV setupbox
When kernel variants were renamed in
69cd6ff843
these dtb vars were forgotten, making it impossible to boot a kernel
build with `pmbootstrap build linux-postmarketos-exynos4`, no dtb is
appended to the zImage and we get stuck on samsungs boot logo.
Merged in mainline since 5.9-rc2-next-grate:
- all previously applied patches specific for Tegra and Nexus 7
New features, not merged yet in mainline (only in -next-grate):
- improved power management
- implemented USB OTG
New configuration options
- enable F2FS support (incl. compression), which leads to prolonging
eMMC life
Tested on E1565.
Signed-off-by: David Heidelberg <david@ixit.cz>
There's a generic udev rule to set group ownership of backlights to
'video', but it only runs on the ADD action, which seems to be too
late(?) since the backlight device is never owned by 'video' on boot.
This rule will run on CHANGE too, which might be overkill but seems to
get the job done. It's now possible to set the backlight brightness on
the PBP as a normal user.
Now that CPU scaling is enabled, there is no need to disable the big cluster,
which was hurting performance before by staying at 19.2 MHz. Remove maxcpus=2
from the command line arguments.
[ci:skip-build] Already built successfully on CI
Upgrade to 5.13.0 mainline and disable staging drivers.
Staging drivers are not used by this device and cause
build failures [1].
[1] https://github.com/tobetter/linux/issues/29
[ci:skip-build]: already built successfully in CI
Support the downstream kernel and a close-to-mainline fork. Waveform
data for the eInk display and the Wi-Fi driver are not included yet.
Everything else should work.
