* I2C address for the panel regulator driver depends on the device and
DSI port the display is connected on. Add more backlight paths to support
different hardware configurations. Also add path for legacy rpi_backlight
driver to make testing easier.
* Needed for AIDL HDMI-CEC HAL to work. Some functions that were in the
HIDL HDMI-CEC HAL have been moved to separate HDMI connection HAL in the
AIDL versions. Only returns connection status of HDMI ports on Pi.
onHotplugEvent is not implemented.
* Use hardware/interfaces/tv/hdmi/connection/aidl/ as reference.
* Use vendor property to allow labeling it for SELinux.
* Remove unneeded properties to set version and vendor id. Using the
default values in any case.
* Start the service later at 'class hal' to avoid making this into bootstrap
APEX. 'class early_hal' is started on trigger 'on late-fs' which is too
early for vendor APEX.
* Use device as an identifier in package names so APEXs on rpi4/rpi5 trees
can co-exist. Somehow apex definitions escape the soong namespace. It
doesn't complain about duplicate package names but dependecies later in
the build after analyzing Android.bp files and generating ninja file.
FAILED: ninja: ... multiple rules generate com.android.hardware.bluetooth.rpi-deps-info [-w dupbuild=err]
https://android.googlesource.com/platform/build/soong/+/refs/heads/main/README.md#namespaces
* Not sure if this is an AOSP bug or intended behaviour for apex targets.
Don't like using the rpi4/rpi5 tags but couldn't come up with better
solution to limit the visibility that worked.
* General cleanups. As APEX package contains all dependencies that are
needed for the service, remove unused shared libraries.
Run 'bpfmt -s -w Android.bp'.
* Old rpi_backlight driver is no longer used on recent kernel versions.
Regulator driver is used for backlight instead.
* Change the backlight path and implement scaling to support the official
Raspberry Pi 7" DSI Touch Display & Touch Display 2.
* The original Touch Display has max brightness of 255 while the new Touch
Display 2 has 31.
