linux: update to 4.14.37

[MilhouseVH]

Changelog: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.31
Changelog: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.32
Changelog: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.33
Changelog: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.34
Changelog: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.35 (not released)
Changelog: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.36 (not released)
Changelog: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.37

[MilhouseVH]

Updated kernel-firmware: diff

• linux-firmware: intel: Update Geminilake audio firmware
• linux-firmware: intel: Update Kabylake audio firmware
• linux-firmware: intel: Update Broxton audio firmware
• linux-firmware: intel: Update Skylake audio firmware

[MilhouseVH]

amdgpu: update vce firmware for Polaris
Update firmware files for Intel Bluetooth 9560, 9260, 8265 and 8260.

[lrusak]

what's the status here?

[MilhouseVH]

Not yet reached 4.14.35...

[HiassofT]

@MilhouseVH could you add this commit: HiassofT@e9fd8be

This enables dynamic debug in the kernel, i.e. debug texts are compiled into the kernel and can be enabled at runtime. See here for more info: https://www.kernel.org/doc/html/v4.14/admin-guide/dynamic-debug-howto.html

This option has been enabled in major Linux distros like Debian, Ubuntu etc for quite some time now (oldest Debian I have here is Jessie with kernel 3.16, and the x86 kernel has it enabled).

It'll increase kernel size a bit but it's not dramatic:
RPi2 build without DYNAMIC_DEBUG

-rw-r--r-- 1 hias hias   6984288 Apr 21 16:18 LibreELEC-RPi2.arm-9.0-devel-20180421161200-r28484-g1c10176468.kernel
-rw-r--r-- 1 hias hias 127942656 Apr 21 16:18 LibreELEC-RPi2.arm-9.0-devel-20180421161200-r28484-g1c10176468.system
-rw-r--r-- 1 hias hias 140001280 Apr 21 16:18 LibreELEC-RPi2.arm-9.0-devel-20180421161200-r28484-g1c10176468.tar

and with DYNAMIC_DEBUG enabled

-rw-r--r-- 1 hias hias   7078552 Apr 22 11:57 LibreELEC-RPi2.arm-9.0-devel-20180422112749-r28485-gd547f10333.kernel
-rw-r--r-- 1 hias hias 128536576 Apr 22 11:58 LibreELEC-RPi2.arm-9.0-devel-20180422112749-r28485-gd547f10333.system
-rw-r--r-- 1 hias hias 140687360 Apr 22 11:58 LibreELEC-RPi2.arm-9.0-devel-20180422112749-r28485-gd547f10333.tar

[MilhouseVH]

@HiassofT should we include DYNAMIC_DEBUG for WeTek_Core and WeTek_Play - that would complete the set.

[HiassofT]

Good catch, I totally missed the wetek projects.

Yes, please enable DYNAMIC_DEBUG there as well then all projects should be in line

[MilhouseVH]

DYNAMIC_DEBUG now enabled for all projects.

[HiassofT]

Another small RPi config change: could you pick this commit: HiassofT@85095c9

This adds the missing gpio_keys and rotary_encoder modules that are enabled in the foundation kernel and should fix the gpio-shutdown overlay not working - see here: https://forum.libreelec.tv/thread/12322-rpi-enable-dtoverlay-gpio-shutdown-to-allow-a-switched-power-on-off/