Huge thanks to smp and nvdias for helping
I tweaked the linux.aarch64.conf file as smp suggested, re-compiled and now my scottish friend is up and running with a current matrix LE using tbs5520SE
Next steps...
- I'll go back and explore nvdias kernel overlay so I understand it
- if I get time I'll post up a Noobs guide to compiling LE with what I have learnt (if that is helpful?)
Thanks smp . I followed your instructions to the letter
tbs5520SE not recognised, beyond lsusb seeing it (below)
(pastekodi and other debug info below)
I checked the build logs and it looks like your excellent patch is being applied (54.log excerpt below)
Having followed nvdias above, I wonder if...
- firmware is correctly installed for tbs5520se ?? I haven't tweaked any firmware
Any help anyone can give is much appreciated
For interest - I am actually trying to debug my friends tbs5520SE a few hundred miles away in Scotland so he is not without TV - smile 
______________________
kernel is shown as aarch64 5.10.52
54.log
patching file kernel/power/main.c
Hunk #1 succeeded at 95 (offset 49 lines).
[1;32mAPPLY PATCH [1;37m(common - raspberrypi)[0m[0m packages/linux/patches/raspberrypi/linux-tbs5520se.patch
patching file drivers/media/dvb-frontends/Kconfig
patching file drivers/media/dvb-frontends/Makefile
patching file drivers/media/dvb-frontends/si2183.c
patching file drivers/media/dvb-frontends/si2183.h
patching file drivers/media/usb/dvb-usb/Kconfig
Hunk #1 succeeded at 343 (offset 3 lines).
patching file drivers/media/usb/dvb-usb/Makefile
patching file drivers/media/usb/dvb-usb/tbs5520se.c
patching file drivers/media/usb/dvb-usb/tbs5520se.h
patching file drivers/media/tuners/Kconfig
patching file drivers/media/tuners/Makefile
patching file drivers/media/tuners/av201x.c
patching file drivers/media/tuners/av201x.h
patching file drivers/media/tuners/av201x_priv.h
patching file drivers/media/usb/dvb-usb/dvb-usb.h
patching file drivers/media/dvb-core/dvb_frontend.c
Hunk #3 succeeded at 2716 (offset -73 lines).
patching file include/media/dvb_frontend.h
patching file drivers/media/usb/dvb-usb/dvb-usb-dvb.c
patching file drivers/media/tuners/si2157.c
patching file include/uapi/linux/dvb/frontend.h
[1;33mBUILD[0m linux [1;37m(host)[0m
[1;35mTOOLCHAIN[0m make (auto-detect)
pastekodi - http://ix.io/3wXv
pi4:~ # lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 734c:5521 TBS Technologies China
Bus 001 Device 003: ID 1997:2433 Shenzhen Riitek Technology Co., Ltd wireless mini keyboard with touchpad
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
pi4:~ # lspci
00:00.0 PCI bridge: Broadcom Inc. and subsidiaries Device 2711 (rev 10)
01:00.0 USB controller: VIA Technologies, Inc. VL805 USB 3.0 Host Controller (rev 01)
My thanks to nvdias, smp and cvh for their work on this issue.
I have realised that the tbs drivers are very kernel specific when I tried to compile them
I have RPi4 and tbs5520se.
I compiled releases 9.95.2 (kernel 5.10.27) and 9.95.1 (kernel 5.10.17) successfully, but neither will work with the nvdias overlay driver for kernel 5.10.25
Sorry if a Noob question...
How do I find or generate a libreelec image with a kernel 5.10.25, so I can use nvdias patch (from above)?
or please point me to a libreelec image that will definitely work with tbs5520SE?
Alternatively, how do I recompile the tbs drivers for a newer kernel?
Someone said 9.2.6 works with Rpi4 ?? I'm greedy, I want 9.2.8 with widevine fix as well
Thanks
There seems to be a problem with these cards in newer kernels, see
A couple of possible solutions in the thread, but they involve building/tweaking
Huge thanks to crazycat and LE team for their work. I'm looking forward to a solution to this
