Anssi Hannula
Design Engineer at Bitwise Oy
Tampere, Pirkanmaa, Finland
Summary
🤩
Rockstar🎓
Top SchoolAnssi Hannula is a seasoned design engineer with 26 years of experience specializing in embedded Linux, board support and driver development for ARM SoCs. Based in Tampere, he combines hands‑on platform image work with Buildroot and Yocto, deep kernel and audio/HID subsystems expertise, and practical debugging of hardware interactions. His long-term open source contributions span PowerTOP, Buildroot, Kodi and kernel HID fixes, reflecting a focus on power profiling, build robustness and multimedia/USB device support. Comfortable both as a volunteer contributor and in industry at Bitwise Oy, he brings a pragmatic, low-level systems mindset that bridges firmware, drivers and user-facing media features. Notably, he has adapted tools to changing kernel tracing and power interfaces, showing an aptitude for keeping legacy tooling relevant as kernels evolve.
26 years of coding experience
Tampere University of Technology 1965-2018
Github Skills (37)
c-language10
system-programming10
buildroot10
c-programming10
c1110
linux-kernel10
c1710
kernel10
audio10
gdb10
substr10
device-driver10
driver10
sys10
android10
Programming languages (10)
Github contributions (5)
xbmc/xbmc
Jan 2011 - Dec 2019
Kodi is an award-winning free and open source home theater/media center software and entertainment hub for digital media. With its beautiful interface and powerful skinning engine, it's available for Android, BSD, Linux, macOS, iOS, tvOS and Windows.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:163 commits, 12 PRs, 4 pushes in 9 years 1 month
Contributions summary:Anssi primarily contributed to the audio engine and subtitle handling components of the Kodi project. Their work included implementing support for the ALSA channel mapping API, which improved audio output on various devices. Additionally, the user fixed bugs related to manual loading and autoloading of VobSub subtitles, and addressed timestamping issues. They also worked on handling TrueHD audio streams, and on Android-specific improvements to the audio playback.
pythonentertainmentc-plus-plusiosmultimedia
jonsmirl/mpc5200
Jul 2005 - Feb 2011
Digispeaker
Role in this project:Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:50 commits in 5 years 8 months
Contributions summary:Anssi primarily contributed to the HID (Human Interface Device) subsystem of the Linux kernel, specifically within the context of USB-based devices, including force feedback and gamepads. They addressed a lockup regression in the HID core, modifying `hid-core.c`, `hid-pidff.c`, and `usbhid.h` to fix an issue related to the handling of force feedback events and report queues. The user also added support for new device IDs, and addressed conflicts with DVB devices in the aw2 driver, which highlights debugging and understanding of hardware interactions within the kernel.
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