I looks you are not in the correct directory to apply the patch.
you should be in (..)sources/arm-openstlinux_weston-linux-gnueabi/linux-stm32mp-4.19-r0/linux-4.19.9
and use this command : $for p in `ls -1 ../*.patch`; do patch -p1 < $p; done
Also, are you in shell compatible with SDK cross-compilation ?
If not please do this before any other command :
$source [Developer_Package_Path]/SDK/environment-setup-cortexa7t2hf-neon-vfpv4-openstlinux_weston-linux-gnueabi
Hope it help
Olivier
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