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* Audio
- Based on AOSP hikey audio HAL:
https://android.googlesource.com/device/linaro/hikey/+/refs/heads/master/audio/
- ALSA based on Android-x86
- ALSA loop is used to support HDMI audio on Pi 4 because VC4 HDMI
audio devices use SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE that is not
supported on Android
https://github.com/raspberrypi/linux/issues/4651
https://github.com/raspberrypi/linux/issues/4654
* Bluetooth
- AOSP Broadcom vendor stack with some additional fixes from android-rpi
* Camera
- libcamera for official Raspberry Pi CSI camera modules based on GloDroid
- AOSP external camera HAL for UVC USB webcams:
https://source.android.com/docs/core/camera/external-usb-cameras
* Graphics
- OpenGL & Vulkan: upstream Mesa with GloDroid patches
- Upstream drm_hwcomposer with force resolution patch from Android-x86 and
my additional fixes
- minigbm based on GloDroid
* Health
- Based on AOSP cuttlefish health HAL
* Kernel
- Merge of Raspberry Pi and AOSP common kernel with my additional fixes
and configurations
https://github.com/raspberrypi/linux
https://android.googlesource.com/kernel/common/
* Lights
- Based on LineageOS Xiaomi msm8996-common lights HAL
* suspend_blocker
- Based on AOSP cuttlefish
* v4l2_codec2
- Based on AOSP with my Raspberry Pi 4 specific fixes
* Wifi
- AOSP Broadcom vendor stack with my additional fixes