Hello smp,
sorry for my late reply, thank you very much for your great help.
I got it working by creating two folders a and b and then copying all existing kernel files (libreelec extracted during a first clean build run without the patched kernel) in the folder a, and then the modifyed/created new files from the linux-media repository in the b folder. Then I used the following comand to create the combined patchfile:
And then I copied the patchfile to this folder: projects/Generic/patches/linux/. And lastly enabled the tbsecp3 driver in libreELEC by adding CONFIG_DVB_TBSECP3=m to the config in projects/Generic/linux/linux.x86_64.conf.
best regards
jonnybe