Contributions to the Linux kernel

I’ve first used Linux when I was in middle school. Since then I’ve used a wide variety of operating systems, spending lots of time with FreeBSD and getting my kernel development career started there, but I did eventually come back to the one and only big kernel due to shifting priorities and whatnot and started contributing as I went.

Bug Trophy Rack

• drm/rockchip: vop: clear DMA stop bit on RK3066: unbroke RGB display output on an ancient SoC just for fun
• drm/dp: drm_edp_backlight_set_level: do not always send 3-byte commands: quickly caught a regression that broke my laptop backlight control
• phy: qcom: edp: Fix NULL pointer dereference for phy v6 (x1e80100): just an instance of boot breaking entirely
• media: iris: use fallback size when S_FMT is called without width/height: unbroke userspace clients by matching their expectations
• phy: qcom: qmp-combo: Move pipe_clk on/off to common: unbroke USB 2.0 functionality on Type-C ports in DP alt mode
• ASoC: codecs: aw88261: support changing sample rate and bit width, &c: overhauled a disastrously broken and lying driver for a speaker amp chip used in phones
• arm64: dts: qcom: x1-dell-thena: remove i2c20 (battery SMBus) and reserve its pins: sometimes I am the one putting down a rake for myself to later step on…
• remoteproc: qcom_wcnss: Fix handling the lack of PD regulators in v3: fixed broken initialization that only showed up on LLVM-compiled kernels that was due to reading past an array
• cpuidle: warn and fixup on sanity check instead of rejecting the driver (fixed differently): caught the cpuidle subsystem rejecting the entire driver after an update
• Re: gpio: improve support for shared GPIOs: helped debug GPIO patches that broke audio initialization on X1E
• Re: soc: qcom: mdt_loader: Fix error return values in mdt_header_valid(): caught an overly optimistic patch that expected a not-quite-ELF format to be fully compliant
• Re: usb: gadget: f_ncm: Fix net_device lifecycle with device_move: caught a NULL dereference in a USB gadget driver

Devices Upstreamed

• Dell Latitude 7455 / Inspiron 14 Plus 7441 (collab): a very nice arm64 laptop
• ECS LIVA QC710: the original Windows on Snapdragon dev kit
• Motorola Edge 30: my first kinda-actually daily-driveable mainline-Linux smartphone

Virtualization Work

• drm/virtio: Allow importing prime buffers when 3D is enabled: removed a restriction that was preventing udmabuf usage for zero-copy guest-to-host buffer passing