Unfortunately, at the moment MSM8916 devices always have to install
all of linux-firmware-qcom (~ 60 MiB) when they actually just use
~ 0.008 MiB of GPU firmware in there. Everything else is just big
firmware blobs for other SoCs that are never going to be useful.
It's much more efficient to package the necessary firmware separately
to save rootfs space. The DB410c linux-board-support-package contains
all the firmware from linux-firmware as well, so we can easily package
it as part of the firmware-qcom-db410c package.
This commit makes the following changes to firmware-qcom-db410c:
1. Package venus() firmware that was previously installed from
linux-firmware-qcom. GPU firmware is packaged in firmware-qcom-adreno.
2. Use new firmware paths for DB410c that were applied upstream
3. "Squash" the firmware blobs to a single file using pil-squasher
Right now we have all firmware packages under firmware/*.
This is problematic for mainly two reasons:
- It's not immediately clear which firmware packages we need to keep
when forking a new stable branch. (Where we delete testing devices
at the moment...) We might end up deleting firmware packages that
are actually used by one of the devices in community.
- When backporting devices to the stable we cannot just cherry-pick
the commit that moved the device to community (since it does not
contain the firmware package). Instead we need to cherry-pick
earlier commits as well, which may touch a lot of deleted files
in the testing directory.
Let's make this consistent by also placing the firmware packages in
the device/* directory. We already have the common firmware- prefix
to distinguish them from device/kernel packages, which are already
both under the device/* directory.
