Gahing's Space

Bringing Up the RK3576 NPU on Mainline Linux

Mon, 15 Jun 2026 00:00:00 +0000

Chasing all-zero NPU output on the RK3576 — the wrong theories, the offsets I got right, and the on-chip buffer that still won't hand the math real numbers.

Porting OP-TEE to the RK3576

Fri, 12 Jun 2026 00:00:00 +0000

Bringing up a secure world on the RK3576 — a silent console, a different TRNG, an OTP key you can only write once, and a review that made all of it better.

RK3576 UEFI: Teaching EDK2 to Drive HDMI, USB, and eMMC

Sun, 31 May 2026 00:00:00 +0000

Replacing U-Boot proper with EDK2 on the RK3576 — and the three peripherals that each had their own way of refusing to work.

A One-Line TF-A Fix, and the Review That Came With It

Sun, 24 May 2026 00:00:00 +0000

Deleting one redundant line from Trusted Firmware-A's RK3576 platform — and what upstreaming even a trivial patch actually looks like.

About

Mon, 01 Jan 0001 00:00:00 +0000

Ga Hing Woo (Jiaxing Hu)

Hi — I’m Ga Hing Woo. I’m finishing high school and about to start university, and in the meantime I spend an unreasonable amount of my free time at the very bottom of the software stack: firmware, embedded Linux, and bringing up ARM SoCs that don’t quite work yet. Lately that’s meant living inside the Rockchip RK3576.

I like the layer where there’s no app, no framework, sometimes no documentation — just a board, a serial console, and a peripheral that refuses to cooperate. Most of what I do is the same loop: form a theory, flash it, watch what the hardware actually does, and let it tell me I was wrong. I usually am, for a while. That’s the fun part.