linux-kernel - [PATCH v2 0/2] Enable compressed files in EXTRA

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Date: Fri,  5 Jan 2024 01:10:00 -0500
From: Kevin Martin <kevinmbecause@...il.com>
To: Luis Chamberlain <mcgrof@...nel.org>,
	Russ Weight <russ.weight@...ux.dev>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Masahiro Yamada <masahiroy@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Nicolas Schier <nicolas@...sle.eu>,
	linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Kevin Martin <kevinmbecause@...il.com>
Subject: [PATCH v2 0/2] Enable compressed files in EXTRA_FIRMWARE

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(-)

-- 
2.41.0