P treble configuraton:
- The project MTK will release is New Launch in Android P, so the default configuration in the release will be New Launch in Android P
- Need to change to OTA (O to P) configuration for Upgrade to Android P project
| Topic | New launch in Android P (by default) | OTA (O to P) |
| Overall config | device/mediatek/common/device.mk PRODUCT_SHIPPING_API_LEVEL := 28 |
device/mediatekprojects/[PROJ]/device.mk PRODUCT_SHIPPING_API_LEVEL_OVERRIDE := 26 |
| VNDK enforcement | Enabled by default when we set PRODUCT_SHIPPING_API_LEVEL as 28 | Can support and can enable by setting following config device/mediatekprojects/[PROJ]/device.mk BOARD_VNDK_VERSION := current |
| System property compatibility | Enabled by default when we set PRODUCT_SHIPPING_API_LEVEL as 28 | Cannot support and need to disable device/mediatekprojects/[PROJ]/device.mk PRODUCT_COMPATIBLE_PROPERTY_OVERRIDE := false |
| System SDK | Enabled by default when we set PRODUCT_SHIPPING_API_LEVEL as 28 | Can support and can enable by setting following config device/mediatekprojects/[PROJ]/device.mk BOARD_SYSTEMSDK_VERSIONS := 28 |
| HIDL | Set initial Android version as P and use device/mediatek/common/manifest_target_level_p.xml when we set PRODUCT_SHIPPING_API_LEVEL as 28 | Set initial Android version as O and use device/mediatek/common/manifest_target_level_o.xml when we set PRODUCT_SHIPPING_API_LEVEL_OVERRIDE as 26 |
| System as root
Note: kernel-4.4 should enable DM_ANDROID_VERITY and kernel-4.9 should enable AVB2.0 |
vendor/mediatek/proprietary/bootable/bootloader/lk/project/${PROJ}.mk SYSTEM_AS_ROOT = yeskernel-4.4 platform kernel-4.4/drivers/misc/mediatek/Kconfig SYSTEM_AS_ROOT default y MTK_GROUP_ENABLE_VERITY default y kernel-4.9 platform |
Can support and can enable by setting following config device/mediatekprojects/[PROJ]/ProjectConfig.mk SYSTEM_AS_ROOT = yesvendor/mediatek/proprietary/bootable/bootloader/lk/project/${PROJ}.mk SYSTEM_AS_ROOT = yes kernel-4.4 platform SYSTEM_AS_ROOT default y kernel-4.9 platform Additional setting if project already enabled AVB2.0 in O: |
| 64-bit binder | Should support in both 32-bit and 64-bit project devide/mediatek/[PLAT]/BoardConfig.mk TARGET_USES_64_BIT_BINDER := truekernel-4.4/drivers/misc/mediatek/Kconfig kernel-4.9/drivers/misc/mediatek/Kconfig ANDROID_BINDER_IPC_32BIT default n |
Can support and can enable by setting following config devide/mediatek/[PLAT]/BoardConfig.mk TARGET_USES_64_BIT_BINDER := truekernel-4.4/drivers/misc/mediatek/Kconfig kernel-4.9/drivers/misc/mediatek/Kconfig ANDROID_BINDER_IPC_32BIT default n |