Notes on software, hardware, and debugging.https://andiradulescu.github.io/https://andiradulescu.github.io/posts/openpilot-cameras-mainline-linux/https://andiradulescu.github.io/posts/openpilot-cameras-mainline-linux/Bringing three cameras, tinygrad DMA-BUF inference, hardware encoding, and audio together on vamOS with Linux 7.2.Sun, 20 Sep 2026 20:28:17 GMThttps://andiradulescu.github.io/posts/tinygrad-msm-drm-part-3/https://andiradulescu.github.io/posts/tinygrad-msm-drm-part-3/Porting MSM to HCQ2, fixing JIT views and GPU timestamps, and preparing a narrower Adreno 630 implementation for upstream review.Sat, 19 Sep 2026 18:45:00 GMThttps://andiradulescu.github.io/posts/how-i-listen-to-music-now/https://andiradulescu.github.io/posts/how-i-listen-to-music-now/A second-hand iPod Shuffle, a battery I replaced myself, inexpensive Samsung earphones, and keeping AAC audio instead of converting it to MP3.Sat, 19 Sep 2026 17:00:00 GMThttps://andiradulescu.github.io/posts/xbox-1556-battery-i2c-reset/https://andiradulescu.github.io/posts/xbox-1556-battery-i2c-reset/Diagnosing and resetting an Xbox model 1556 battery charger over I²C, with a verified pinout and before-and-after register readings.Fri, 18 Sep 2026 12:00:00 GMThttps://andiradulescu.github.io/posts/reverse-engineering-vw-steering-limit-part-1/https://andiradulescu.github.io/posts/reverse-engineering-vw-steering-limit-part-1/Two failed attempts to increase openpilot steering torque, and the firmware analysis that traced the VW EPS rejection to internal model checks.Thu, 30 Jul 2026 12:00:00 GMThttps://andiradulescu.github.io/posts/tinygrad-msm-drm-part-2/https://andiradulescu.github.io/posts/tinygrad-msm-drm-part-2/Reusing QCOM, fixing an instruction-size mismatch, and discovering why green checks and device runs were not enough for an upstream contribution.Thu, 30 Jul 2026 09:00:00 GMThttps://andiradulescu.github.io/posts/tinygrad-msm-drm-part-1/https://andiradulescu.github.io/posts/tinygrad-msm-drm-part-1/The first MSM DRM backend, its buffer-lifetime experiments, and why passing small GPU tests did not make it a working openpilot runtime.Sun, 26 Jul 2026 18:00:00 GMThttps://andiradulescu.github.io/posts/openpilot-cameras-mainline-linux-first-attempt/https://andiradulescu.github.io/posts/openpilot-cameras-mainline-linux-first-attempt/My first CAMSS camera port: kernel-side sensor and ISP configuration, raw capture, broken lookup tables, and the unfinished openpilot integration.Wed, 08 Apr 2026 12:00:00 GMT