Talk Intermediate First Talk

From HIDL to Stable AIDL: Modernizing Android HAL Interfaces

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Session Description

Android is transitioning from HIDL to Stable AIDL to improve HAL interface stability and long-term maintainability. However, many production devices still depend on legacy HIDL implementations, making upgrades difficult.

This talk presents a migration of a HAL from HIDL to Stable AIDL, focusing on real-world challenges. It covers key differences in interface definition, versioning, Binder IPC, and VINTF compatibility. The session walks through a step-by-step migration: rewriting interfaces, updating services, and modifying manifests.

Hands-on guide for engineers who must modernize existing HIDL HALs to Stable AIDL in shipping devices.

Key Takeaways

Explain the core architectural differences between HIDL and AIDL in the Android HAL stack.
List the Android version milestones that make AIDL mandatory for new and production devices.
Execute a step-by-step HIDL → AIDL migration for a real hardware interface.
Address SELinux policy changes, VINTF manifest updates, and compatibility matrix versioning required by the migration.
Identify and mitigate common failure, validation.

References

https://source.android.com/docs/core/architecture/aidl/stable-aidl

Session Categories

Technology architecture

Engineering practice - productivity, debugging

Which track are you applying for?

Android Open Source Project (AOSP)

Speakers

Ankit Siddhapura Technical Lead - Embedded Software | Silicon Signals Pvt. Ltd

Ankit Siddhapura is a Technical lead in embedded software at Silicon Signals pvt ltd.

A dedicated contributor to the Android Open Source Project (AOSP) and the Android custom ROM.

Embedded Software Engineer with expertise in Android/Linux BSP, AOSP camera stack, and IoT solutions. Experienced with Qualcomm, NXP, and Amlogic platforms, camera HAL, and wireless protocols like Wi-Fi, Zigbee, and LoRaWAN.

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