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aports: extract aw88261_acf.bin on-device instead of shipping it
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New package fp6-vendor-blobs: a manifest-driven systemd oneshot that
copies proprietary blobs out of the stock Android partitions on first
boot. pmOS installs flash only boot+userdata, so every installed unit
still carries the stock vendor/dsp partitions - the device duplicates a
file it already contains, for its own operation, and nothing proprietary
is distributed by us. Partitions are mounted read-only (ext4 additionally
with noload - not even a journal replay touches the stock data), every
copy is sha256-pinned and a miss fails loudly, and the consuming devices
are unbound and re-probed afterwards so the feature works the same boot.

The rebind is unconditional by design: aw88261 binds on a bare i2c
chip-id probe and requests the ACF only at ASoC card init (~21 s, after
SoundWire enumeration), so a bound device can still be one that lost the
firmware race - and that failed request is never retried.

soc-fairphone-fp6-audio (pkgver 4) stops shipping the blob, installs the
manifest fragment instead, and re-runs the extractor from
post-install/post-upgrade so upgrades restore the file immediately (the
old package version removed it on upgrade). License drops back to plain
BSD-3-Clause - nothing proprietary left in the package.

Verified on the dev phone (fp6 repo journal/blobs/captures/
2026-08-24-first-boot-extractor-verification.txt): first-boot extraction
+ same-boot audio, mid-session post-upgrade recovery, and the everyday
fast-path no-op; committed files byte-identical to the tested deployment.

Assisted-by: Claude:claude-fable-5
This commit is contained in:
Jorijn van der Graaf 2026-08-24 21:00:34 +02:00
commit 1e673ca1c4
9 changed files with 290 additions and 15 deletions
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1
build.sh
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@ -129,6 +129,7 @@ rm -rf "$WORK/pmaports/device/testing/linux-postmarketos-qcom-milos" \
mkdir -p "$WORK/pmaports/temp"
cp -r aports/device/linux-postmarketos-qcom-milos "$WORK/pmaports/device/testing/"
cp -r aports/device/soc-fairphone-fp6-audio "$WORK/pmaports/device/"
cp -r aports/device/fp6-vendor-blobs "$WORK/pmaports/device/"
cp -r aports/device/callaudioshim "$WORK/pmaports/device/"
cp -r aports/device/fp6-device-tweaks "$WORK/pmaports/device/"
cp -r aports/device/fp6-charging-mode "$WORK/pmaports/device/"