[v2,0/2] Enable compressed files in EXTRA_FIRMWARE

Message

Kevin Martin Jan. 5, 2024, 6:10 a.m. UTC

The linux-firmware packages on Gentoo, Fedora, Arch, and others compress
the firmware files. This works well with CONFIG_FW_LOADER_COMPRESS, but
does not work with CONFIG_EXTRA_FIRMWARE. This patch allows the build
system to decompress firmware files specified by CONFIG_EXTRA_FIRMWARE.

PATCH 1/2 adds decompression routines next to the compression routines
in scripts/Makefile.lib. That patch is then used by PATCH 2/2 to
decompress files before compiling them into the kernel.

The patch works by copying or decompressing the specified firmware files
into the build directory, then compiling them in from there. I would
prefer to not copy any uncompressed files, but I have not found a clean
way to do that.

 drivers/base/firmware_loader/Kconfig            |  5 ++++-
 drivers/base/firmware_loader/builtin/.gitignore |  5 ++++-
 drivers/base/firmware_loader/builtin/Makefile   | 16 ++++++++++++----
 scripts/Makefile.lib                            |  6 ++++++
 4 files changed, 26 insertions(+), 6 deletions(-)